chore: reduce Renovate noise - monthly schedule, group major updates

2026-10-03 16:27:47 +08:00 · 2026-01-10 23:26:42 +09:00
188 changed files with 12989 additions and 46600 deletions
@@ -47,10 +47,6 @@ To run tests with UI mode:
 npx playwright test --ui
 ```

-## Before You Start
-
-For **significant changes** (new features, architecture changes, large refactors, etc.), please **open an issue first** to discuss your proposal before writing code. This helps avoid wasted effort and ensures alignment with the project direction. Small bug fixes and minor improvements can go straight to a PR.
-
 ## Pull Requests

 1. Create a feature branch
@@ -61,21 +57,6 @@ For **significant changes** (new features, architecture changes, large refactors

 CI will run the full test suite on your PR.

-## Using AI Tools
-
-AI-assisted contributions are welcome. But please **review the output before opening a PR**:
-
-1. **Review the code** — understand what was generated, don't just commit blindly
-2. **Write a PR description** — explain what changed and why
-3. **Rebase on latest `main`** — AI tools often work on stale branches, run `git rebase origin/main` before pushing
-4. **Clean up artifacts** — remove IDE configs (`.idea/`, `.kiro/`), env files, scratch notes, and throwaway test scripts that AI tools leave behind
-
-## Code Review
-
-This project uses GitHub Copilot for automated code review. If you receive review comments from Copilot on your PR:
- **Valid suggestions**: Please address them in your code.
- **Invalid or irrelevant suggestions**: Feel free to click "Resolve" to dismiss them.
-
 ## Issues

 Include steps to reproduce, expected vs actual behavior, and AI provider used.
@@ -33,11 +33,6 @@
            "matchPackagePatterns": ["@ai-sdk/*", "ai", "next"],
            "groupName": "Core framework packages",
            "automerge": false
-        },
-        {
-            "matchPackageNames": ["@biomejs/biome"],
-            "groupName": "Biome",
-            "automerge": false
        }
    ],
    "vulnerabilityAlerts": {
@@ -23,9 +23,7 @@ jobs:
          node-version: '24'

      - name: Run Biome format
-        # Pin to the version in package.json so CI matches local/pre-commit
-        # (npx @latest drifts — e.g. 2.5.0 broke this job on unrelated PRs).
-        run: npx @biomejs/[email protected] check --write --no-errors-on-unmatched .
+        run: npx @biomejs/biome@latest check --write --no-errors-on-unmatched .

      - name: Check for changes
        id: changes
@@ -40,3 +40,5 @@ jobs:
      - name: Build
        run: npm run build

+      - name: Security audit
+        run: npm audit --audit-level=high --omit=dev
@@ -58,8 +58,6 @@ jobs:
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
-          provenance: mode=max
-          sbom: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
@@ -91,3 +89,4 @@ jobs:
          docker pull ghcr.io/${REPO_LOWER}:latest
          docker tag ghcr.io/${REPO_LOWER}:latest ${{ secrets.AWS_ACCOUNT_ID }}.dkr.ecr.ap-northeast-1.amazonaws.com/next-ai-draw-io:latest
          docker push ${{ secrets.AWS_ACCOUNT_ID }}.dkr.ecr.ap-northeast-1.amazonaws.com/next-ai-draw-io:latest
+
@@ -34,15 +34,6 @@ jobs:
          node-version: 24
          cache: "npm"

-      - name: Download draw.io static files for offline use
-        run: |
-          rm -rf public/drawio
-          git clone --depth 1 https://github.com/jgraph/drawio.git /tmp/drawio
-          mkdir -p public/drawio
-          cp -r /tmp/drawio/src/main/webapp/* public/drawio/
-          rm -rf public/drawio/WEB-INF
-          rm -rf public/drawio/META-INF
-
      - name: Install dependencies
        run: npm install

@@ -66,16 +57,6 @@ jobs:
          node-version: 24
          cache: "npm"

-      - name: Download draw.io static files for offline use
-        shell: bash
-        run: |
-          rm -rf public/drawio
-          git clone --depth 1 https://github.com/jgraph/drawio.git /tmp/drawio
-          mkdir -p public/drawio
-          cp -r /tmp/drawio/src/main/webapp/* public/drawio/
-          rm -rf public/drawio/WEB-INF
-          rm -rf public/drawio/META-INF
-
      - name: Install dependencies
        run: npm install

@@ -99,7 +80,7 @@ jobs:
          api-token: ${{ secrets.SIGNPATH_API_TOKEN }}
          organization-id: '880a211d-2cd3-4e7b-8d04-3d1f8eb39df5'
          project-slug: 'next-ai-draw-io'
-          signing-policy-slug: 'release-signing'
+          signing-policy-slug: 'test-signing'
          artifact-configuration-slug: 'windows-exe'
          github-artifact-id: ${{ steps.upload-unsigned.outputs.artifact-id }}
          wait-for-completion: true
@@ -1,67 +0,0 @@
-name: Publish MCP Server
-
-# Publishes @next-ai-drawio/mcp-server to npm via OIDC trusted publishing
-# (no token, no OTP). Triggers when packages/mcp-server changes on main;
-# skips silently if the package.json version is already on npm — so a
-# release is just "bump the version in a PR and merge".
-on:
-  push:
-    branches:
-      - main
-    paths:
-      - "packages/mcp-server/**"
-  workflow_dispatch:
-
-permissions:
-  contents: read
-  id-token: write # OIDC token for npm trusted publishing
-
-concurrency:
-  group: publish-mcp
-  cancel-in-progress: false
-
-jobs:
-  publish:
-    runs-on: ubuntu-latest
-    defaults:
-      run:
-        working-directory: packages/mcp-server
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v6
-
-      - name: Setup Node.js
-        uses: actions/setup-node@v6
-        with:
-          node-version: 24
-          cache: "npm"
-          cache-dependency-path: packages/mcp-server/package-lock.json
-          registry-url: "https://registry.npmjs.org"
-
-      # Trusted publishing requires npm >= 11.5.1
-      - name: Update npm
-        run: npm install -g npm@latest
-
-      - name: Check if version is already published
-        id: version
-        run: |
-          LOCAL=$(node -p "require('./package.json').version")
-          if npm view "@next-ai-drawio/mcp-server@${LOCAL}" version >/dev/null 2>&1; then
-            echo "Version ${LOCAL} already on npm - nothing to publish"
-            echo "publish=false" >> "$GITHUB_OUTPUT"
-          else
-            echo "Version ${LOCAL} not on npm - publishing"
-            echo "publish=true" >> "$GITHUB_OUTPUT"
-          fi
-
-      - name: Install dependencies
-        if: steps.version.outputs.publish == 'true'
-        run: npm ci
-
-      - name: Test
-        if: steps.version.outputs.publish == 'true'
-        run: npm test
-
-      - name: Publish to npm
-        if: steps.version.outputs.publish == 'true'
-        run: npm publish
@@ -28,16 +28,6 @@ jobs:
      - name: Run unit tests
        run: npm run test -- --run

-      # The MCP server package ships its own vitest because its DOM polyfill
-      # (linkedom) needs `environment: node`, while the root vitest uses jsdom
-      # for the Next.js app. Install + run its tests separately so CI catches
-      # multi-page mxfile regressions.
-      - name: Install MCP server dependencies
-        run: npm --prefix packages/mcp-server ci
-
-      - name: Run MCP server unit tests
-        run: npm --prefix packages/mcp-server test
-
  e2e:
    name: E2E Tests
    runs-on: ubuntu-latest
@@ -56,8 +56,6 @@ push-via-ec2.sh
 /dist-electron/
 /release/
 /electron-standalone/
-# Draw.io static files (downloaded during CI build)
-public/drawio/
 *.dmg
 *.exe
 *.AppImage
@@ -69,15 +67,4 @@ CLAUDE.md
 .spec-workflow

 # edgeone
-.edgeone
-opencode.json
-ai-models.json
-
-# local backups
-*.bak
-.gstack/
-
-# admin panel settings (contains secrets)
-data/
-# ...but the diagram engine's stencil catalog is generated source, not settings
-!lib/diagram-engine/data/
+.edgeone
@@ -9,7 +9,6 @@ WORKDIR /app
 COPY package.json package-lock.json* ./

 # Install dependencies
-ARG ELECTRON_SKIP_BINARY_DOWNLOAD=1
 RUN npm install

 # Stage 2: Build application
@@ -35,11 +34,6 @@ ENV NEXT_PUBLIC_SHOW_ABOUT_AND_NOTICE=${NEXT_PUBLIC_SHOW_ABOUT_AND_NOTICE}
 ARG NEXT_PUBLIC_BASE_PATH=""
 ENV NEXT_PUBLIC_BASE_PATH=${NEXT_PUBLIC_BASE_PATH}

-# Control sponsorship and self-hosting messaging in quota notifications.
-# Set NEXT_PUBLIC_SELFHOSTED="true" in self-hosted deployments to hide sponsorship/self-host links and related text in quota popups.
-ARG NEXT_PUBLIC_SELFHOSTED=""
-ENV NEXT_PUBLIC_SELFHOSTED="${NEXT_PUBLIC_SELFHOSTED}"
-
 # Build Next.js application (standalone mode)
 RUN npm run build

@@ -61,9 +55,6 @@ COPY --from=builder /app/public ./public
 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

-# Writable dir for admin panel settings (data/settings.json)
-RUN mkdir -p /app/data && chown nextjs:nodejs /app/data
-
 USER nextjs

 EXPOSE 3000
@@ -1,52 +0,0 @@
-next-ai-draw-io
-Copyright the next-ai-draw-io contributors
-
-This product includes software developed by third parties, as set out below.
-
--------------------------------------------------------------------------------
-lib/diagram-engine/ — layout and rendering
--------------------------------------------------------------------------------
-
-The declarative layout algorithm (bottom-up measure, top-down place, sibling
-size equalisation), the swimlane-pool geometry, and the mxCell/style emission in
-`lib/diagram-engine/layout.ts` and `lib/diagram-engine/render.ts` are derived
-from drawio-ai-kit:
-
-    https://github.com/sparklabx/drawio-ai-kit
-    Copyright (c) sparklabx
-    Licensed under the MIT License
-
-Original to this repository:
-
-  - the XML→tree reverse parser (`parse.ts`), which that project does not have
-  - the style-marker scheme (`markers.ts`) that lets structure survive a
-    round-trip through the draw.io editor
-  - the structural-operations layer (`operations.ts`)
-  - the invisible-container approach that replaces that project's "phantom" nodes
-  - the edge router (`route.ts`)
-  - the graph→layers pass (`graph.ts`): layer assignment, cycle breaking and
-    barycentre crossing reduction, which turn a flat node/arrow list into a
-    flowchart
-  - the sequence-diagram and radial (mind map / org chart) layouts
-
--------------------------------------------------------------------------------
-lib/diagram-engine/data/aws-stencils.json — stencil catalog
--------------------------------------------------------------------------------
-
-A name→style map for the mxgraph.aws4 stencil family, generated from
-drawio-ai-kit's `catalog/aws.json`, which in turn was generated from the draw.io
-shape index published by jgraph:
-
-    https://github.com/jgraph/drawio-mcp
-    Copyright (c) JGraph Ltd
-    Licensed under the Apache License, Version 2.0
-
-The style strings are reproduced verbatim from that index. They reference the
-official AWS Architecture Icons, which are trademarks of Amazon Web Services and
-are NOT covered by this repository's licence. Their use is governed by the AWS
-Architecture Icons terms:
-
-    https://aws.amazon.com/architecture/icons/
-
-The catalog contains stencil *names and style strings* only — it does not embed
-any AWS icon artwork. draw.io supplies the artwork at render time.
@@ -19,7 +19,7 @@ English | [中文](./docs/cn/README_CN.md) | [日本語](./docs/ja/README_JA.md)

 A Next.js web application that integrates AI capabilities with draw.io diagrams. Create, modify, and enhance diagrams through natural language commands and AI-assisted visualization.

-> Note: Thanks to <img src="https://raw.githubusercontent.com/DayuanJiang/next-ai-draw-io/main/public/doubao-color.png" alt="" height="20" /> [ByteDance Doubao](https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio) sponsorship, the demo site now uses the powerful glm-4.7 model!
+> Note: Thanks to <img src="https://raw.githubusercontent.com/DayuanJiang/next-ai-draw-io/main/public/doubao-color.png" alt="" height="20" /> [ByteDance Doubao](https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project) sponsorship, the demo site now uses the powerful K2-thinking model!


 https://github.com/user-attachments/assets/9d60a3e8-4a1c-4b5e-acbb-26af2d3eabd1
@@ -31,7 +31,7 @@ https://github.com/user-attachments/assets/9d60a3e8-4a1c-4b5e-acbb-26af2d3eabd1
  - [Table of Contents](#table-of-contents)
  - [Examples](#examples)
  - [Features](#features)
-  - [MCP Server](#mcp-server)
+  - [MCP Server (Preview)](#mcp-server-preview)
    - [Claude Code CLI](#claude-code-cli)
  - [Getting Started](#getting-started)
    - [Try it Online](#try-it-online)
@@ -43,8 +43,6 @@ https://github.com/user-attachments/assets/9d60a3e8-4a1c-4b5e-acbb-26af2d3eabd1
    - [Deploy on Vercel](#deploy-on-vercel)
    - [Deploy on Cloudflare Workers](#deploy-on-cloudflare-workers)
  - [Multi-Provider Support](#multi-provider-support)
-    - [Server-Side Multi-Model Configuration](#server-side-multi-model-configuration)
-    - [Admin Panel](#admin-panel)
  - [How It Works](#how-it-works)
  - [Support \& Contact](#support--contact)
  - [FAQ](#faq)
@@ -65,24 +63,24 @@ Here are some example prompts and their generated diagrams:
  </tr>
  <tr>
    <td width="50%" valign="top">
-      <strong>RAG Technique Diagram</strong><br />
-      <p><strong>Prompt:</strong> Generate a RAG architecture diagram for **chat application**. Use connected diagram for data ingestion</p>
-      <img src="./public/rag_prod.svg" alt="RAG Architecture Diagram" width="480" />
+      <strong>GCP architecture diagram</strong><br />
+      <p><strong>Prompt:</strong> Generate a GCP architecture diagram with **GCP icons**. In this diagram, users connect to a frontend hosted on an instance.</p>
+      <img src="./public/gcp_demo.svg" alt="GCP Architecture Diagram" width="480" />
    </td>
    <td width="50%" valign="top">
-      <strong>Authentication using React and AWS</strong><br />
-      <p><strong>Prompt:</strong> Generate authentication process using React with **AWS**. Use Serverless architecture.</p>
-      <img src="./public/auth.svg" alt="Authentication Architecture Diagram" width="480" />
+      <strong>AWS architecture diagram</strong><br />
+      <p><strong>Prompt:</strong> Generate a AWS architecture diagram with **AWS icons**. In this diagram, users connect to a frontend hosted on an instance.</p>
+      <img src="./public/aws_demo.svg" alt="AWS Architecture Diagram" width="480" />
    </td>
  </tr>
  <tr>
    <td width="50%" valign="top">
-      <strong>Open Innovation</strong><br />
-      <p><strong>Prompt:</strong> Create visualization of Henry Chesbrough's Open Innovation model.</p>
-      <img src="./public/inno.svg" alt="Open Innovation Diagram" width="480" />
+      <strong>Azure architecture diagram</strong><br />
+      <p><strong>Prompt:</strong> Generate a Azure architecture diagram with **Azure icons**. In this diagram, users connect to a frontend hosted on an instance.</p>
+      <img src="./public/azure_demo.svg" alt="Azure Architecture Diagram" width="480" />
    </td>
    <td width="50%" valign="top">
-      <strong>Cat sketch</strong><br />
+      <strong>Cat sketch prompt</strong><br />
      <p><strong>Prompt:</strong> Draw a cute cat for me.</p>
      <img src="./public/cat_demo.svg" alt="Cat Drawing" width="240" />
    </td>
@@ -99,10 +97,11 @@ Here are some example prompts and their generated diagrams:
 -   **Diagram History**: Comprehensive version control that tracks all changes, allowing you to view and restore previous versions of your diagrams before the AI editing.
 -   **Interactive Chat Interface**: Communicate with AI to refine your diagrams in real-time
 -   **Cloud Architecture Diagram Support**: Specialized support for generating cloud architecture diagrams (AWS, GCP, Azure)
-   **Computed Layout**: For architecture diagrams, flowcharts, swimlane/BPMN diagrams, sequence diagrams, mind maps and org charts, the AI declares only the structure — what contains what, or what points at what — and the app computes every coordinate, size and arrow route. Containers always fit their contents, siblings never overlap, and arrows are routed around the shapes they would otherwise cross. Anything you then move or recolour by hand is read back as part of the diagram, so a later edit does not undo it.
 -   **Animated Connectors**: Create dynamic and animated connectors between diagram elements for better visualization

-## MCP Server
+## MCP Server (Preview)
+
+> **Preview Feature**: This feature is experimental and may not be stable.

 Use Next AI Draw.io with AI agents like Claude Desktop, Cursor, and VS Code via MCP (Model Context Protocol).

@@ -203,16 +202,14 @@ See the [Next.js deployment documentation](https://nextjs.org/docs/app/building-

 ## Multi-Provider Support

-   [ByteDance Doubao](https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio)
+-   [ByteDance Doubao](https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project)
 -   AWS Bedrock (default)
 -   OpenAI
 -   Anthropic
 -   Google AI
-   Google Vertex AI
 -   Azure OpenAI
 -   Ollama
 -   OpenRouter
-   AIHubMix
 -   DeepSeek
 -   SiliconFlow
 -   ModelScope
@@ -224,16 +221,6 @@ All providers except AWS Bedrock and OpenRouter support custom endpoints.

 📖 **[Detailed Provider Configuration Guide](./docs/en/ai-providers.md)** - See setup instructions for each provider.

-### Server-Side Multi-Model Configuration
-
-Administrators can configure multiple server-side models that are available to all users without requiring personal API keys. Configure via `AI_MODELS_CONFIG` environment variable (JSON string) or `ai-models.json` file. For a single-provider quick setup, list comma-separated model IDs in `AI_MODEL`.
-
-### Admin Panel
-
-Set the `ADMIN_PASSWORD` environment variable and visit `/admin` to manage server settings (models, access codes, features, observability, quota) from a web panel instead of hand-editing `.env`.
-
-📖 **[Admin Panel Guide](./docs/en/admin-panel.md)** — setup, precedence rules, and notes.
-
 **Model Requirements**: This task requires strong model capabilities for generating long-form text with strict formatting constraints (draw.io XML). Recommended models include Claude Sonnet 4.5, GPT-5.1, Gemini 3 Pro, and DeepSeek V3.2/R1.

 Note that the `claude` series has been trained on draw.io diagrams with cloud architecture logos like AWS, Azure, GCP. So if you want to create cloud architecture diagrams, this is the best choice.
@@ -252,7 +239,7 @@ Diagrams are represented as XML that can be rendered in draw.io. The AI processe

 ## Support & Contact

-**Special thanks to [ByteDance Doubao](https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio) for sponsoring the API token usage of the demo site!** Register on the ARK platform to get 500K free tokens for all models!
+**Special thanks to [ByteDance Doubao](https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project) for sponsoring the API token usage of the demo site!** Register on the ARK platform to get 500K free tokens for all models!

 If you find this project useful, please consider [sponsoring](https://github.com/sponsors/DayuanJiang) to help me host the live demo site!

@@ -1,7 +1,7 @@
 import type { Metadata } from "next"
+import Image from "next/image"
 import Link from "next/link"
 import { FaGithub } from "react-icons/fa"
-import Image from "@/components/image-with-basepath"

 export const metadata: Metadata = {
    title: "关于 - Next AI Draw.io",
@@ -78,7 +78,7 @@ export default function AboutCN() {
                                <p>
                                    好消息！感谢{" "}
                                    <a
-                                        href="https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio"
+                                        href="https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project"
                                        target="_blank"
                                        rel="noopener noreferrer"
                                        className="font-semibold text-blue-600 hover:underline"
@@ -87,7 +87,7 @@ export default function AboutCN() {
                                    </a>
                                    的慷慨赞助，演示站点现已接入强大的{" "}
                                    <span className="font-semibold text-amber-700">
-                                        glm-4.7
+                                        K2-thinking
                                    </span>{" "}
                                    模型，图表生成效果更佳！点击链接注册即可领取{" "}
                                    <span className="font-semibold text-amber-700">
@@ -97,23 +97,6 @@ export default function AboutCN() {
                                </p>
                            </div>

-                            {/* Invite Poster */}
-                            <div className="text-center mb-5">
-                                <a
-                                    href="https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio"
-                                    target="_blank"
-                                    rel="noopener noreferrer"
-                                >
-                                    <Image
-                                        src="/volcengine-invite.png"
-                                        alt="火山引擎方舟 Coding Plan"
-                                        width={300}
-                                        height={400}
-                                        className="mx-auto rounded-lg"
-                                    />
-                                </a>
-                            </div>
-
                            {/* Bring Your Own Key */}
                            <div className="text-center">
                                <h4 className="text-base font-bold text-gray-900 mb-2">
@@ -160,11 +143,6 @@ export default function AboutCN() {
                            <strong>AWS架构图支持</strong>
                            ：专门支持生成AWS架构图
                        </li>
-                        <li>
-                            <strong>自动计算布局</strong>
-                            ：画架构图、流程图、泳道图、时序图、思维导图和组织架构图时，AI
-                            只描述结构，所有坐标、尺寸和连线路径都由程序计算——容器一定装得下里面的内容，图形不会重叠，连线会绕开本来会穿过的图形
-                        </li>
                        <li>
                            <strong>动画连接器</strong>
                            ：在图表元素之间创建动态动画连接器，实现更好的可视化效果
@@ -180,106 +158,92 @@ export default function AboutCN() {
                    </p>

                    <div className="space-y-8">
-                        {/* ResNet50 Architecture */}
+                        {/* Animated Transformer */}
                        <div className="text-center">
                            <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                ResNet50模型架构动画
+                                动画Transformer连接器
                            </h3>
                            <p className="text-gray-600 mb-4">
-                                <strong>Prompt:</strong> Give me an{" "}
-                                <strong>animated</strong> architecture diagram
-                                of the ResNet50 model.
+                                <strong>提示词：</strong> 给我一个带有
+                                <strong>动画连接器</strong>的Transformer架构图。
                            </p>
-                            <div className="bg-neutral-950 rounded-lg p-4 inline-block">
-                                <Image
-                                    src="/resnet50.svg"
-                                    alt="ResNet50模型架构图"
-                                    width={480}
-                                    height={360}
-                                    className="mx-auto"
-                                />
-                            </div>
+                            <Image
+                                src="/animated_connectors.svg"
+                                alt="带动画连接器的Transformer架构"
+                                width={480}
+                                height={360}
+                                className="mx-auto"
+                            />
                        </div>

-                        {/* Diagram Grid */}
+                        {/* Cloud Architecture Grid */}
                        <div className="grid md:grid-cols-2 gap-6">
                            <div className="text-center">
                                <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    RAG技术图
+                                    GCP架构图
                                </h3>
                                <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate a RAG
-                                    architecture diagram for{" "}
-                                    <strong>chat application</strong>. Use
-                                    connected diagram for data ingestion
+                                    <strong>提示词：</strong> 使用
+                                    <strong>GCP图标</strong>
+                                    生成一个GCP架构图。用户连接到托管在实例上的前端。
                                </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
-                                    <Image
-                                        src="/rag_prod.svg"
-                                        alt="RAG架构图"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
-                                    />
-                                </div>
+                                <Image
+                                    src="/gcp_demo.svg"
+                                    alt="GCP架构图"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
+                                />
                            </div>
                            <div className="text-center">
                                <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    React和AWS认证流程
+                                    AWS架构图
                                </h3>
                                <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate
-                                    authentication process using React with{" "}
-                                    <strong>AWS</strong>. Use Serverless
-                                    architecture.
+                                    <strong>提示词：</strong> 使用
+                                    <strong>AWS图标</strong>
+                                    生成一个AWS架构图。用户连接到托管在实例上的前端。
                                </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
-                                    <Image
-                                        src="/auth.svg"
-                                        alt="认证架构图"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
-                                    />
-                                </div>
+                                <Image
+                                    src="/aws_demo.svg"
+                                    alt="AWS架构图"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
+                                />
                            </div>
                            <div className="text-center">
                                <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    敏捷Scrum流程
+                                    Azure架构图
                                </h3>
                                <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate agile
-                                    scrum workflow diagram for software
-                                    development team.
+                                    <strong>提示词：</strong> 使用
+                                    <strong>Azure图标</strong>
+                                    生成一个Azure架构图。用户连接到托管在实例上的前端。
                                </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
-                                    <Image
-                                        src="/agile_scrum.svg"
-                                        alt="敏捷Scrum流程图"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
-                                    />
-                                </div>
+                                <Image
+                                    src="/azure_demo.svg"
+                                    alt="Azure架构图"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
+                                />
                            </div>
                            <div className="text-center">
                                <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    开放式创新
+                                    猫咪素描
                                </h3>
                                <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Create
-                                    visualization of Henry Chesbrough&apos;s
-                                    Open Innovation model.
+                                    <strong>提示词：</strong>{" "}
+                                    给我画一只可爱的猫。
                                </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
-                                    <Image
-                                        src="/inno.svg"
-                                        alt="开放式创新图"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
-                                    />
-                                </div>
+                                <Image
+                                    src="/cat_demo.svg"
+                                    alt="猫咪绘图"
+                                    width={240}
+                                    height={240}
+                                    className="mx-auto"
+                                />
                            </div>
                        </div>
                    </div>
@@ -313,7 +277,7 @@ export default function AboutCN() {
                    <ul className="list-disc pl-6 text-gray-700 space-y-1">
                        <li>
                            <a
-                                href="https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio"
+                                href="https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project"
                                target="_blank"
                                rel="noopener noreferrer"
                                className="text-blue-600 hover:underline"
@@ -328,7 +292,6 @@ export default function AboutCN() {
                        </li>
                        <li>Anthropic</li>
                        <li>Google AI</li>
-                        <li>Google Vertex AI</li>
                        <li>Azure OpenAI</li>
                        <li>Ollama</li>
                        <li>OpenRouter</li>
@@ -348,7 +311,7 @@ export default function AboutCN() {
                    <p className="text-gray-700 mb-4 font-semibold">
                        特别感谢{" "}
                        <a
-                            href="https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio"
+                            href="https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project"
                            target="_blank"
                            rel="noopener noreferrer"
                            className="text-blue-600 hover:underline"
@@ -1,7 +1,7 @@
 import type { Metadata } from "next"
+import Image from "next/image"
 import Link from "next/link"
 import { FaGithub } from "react-icons/fa"
-import Image from "@/components/image-with-basepath"

 export const metadata: Metadata = {
    title: "概要 - Next AI Draw.io",
@@ -86,7 +86,7 @@ export default function AboutJA() {
                                <p>
                                    朗報です！
                                    <a
-                                        href="https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio"
+                                        href="https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project"
                                        target="_blank"
                                        rel="noopener noreferrer"
                                        className="font-semibold text-blue-600 hover:underline"
@@ -95,7 +95,7 @@ export default function AboutJA() {
                                    </a>
                                    様のご支援により、デモサイトでは強力な{" "}
                                    <span className="font-semibold text-amber-700">
-                                        glm-4.7
+                                        K2-thinking
                                    </span>{" "}
                                    モデルを利用できるようになり、より高品質なダイアグラム生成が可能になりました。リンクから登録すると、すべてのモデルで使える{" "}
                                    <span className="font-semibold text-amber-700">
@@ -153,11 +153,6 @@ export default function AboutJA() {
                            </strong>
                            ：AWSアーキテクチャダイアグラムの生成を専門的にサポート
                        </li>
-                        <li>
-                            <strong>レイアウトの自動計算</strong>
-                            ：アーキテクチャ図、フローチャート、スイムレーン図、シーケンス図、マインドマップ、組織図では、AI
-                            は構造だけを指定し、座標・サイズ・矢印の経路はすべてアプリが計算します——コンテナは必ず中身が収まり、図形は重ならず、矢印は本来通り抜けてしまう図形を避けて引かれます
-                        </li>
                        <li>
                            <strong>アニメーションコネクタ</strong>
                            ：より良い可視化のためにダイアグラム要素間に動的でアニメーション化されたコネクタを作成
@@ -173,106 +168,93 @@ export default function AboutJA() {
                    </p>

                    <div className="space-y-8">
-                        {/* ResNet50 Architecture */}
+                        {/* Animated Transformer */}
                        <div className="text-center">
                            <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                ResNet50モデルアーキテクチャアニメーション
+                                アニメーションTransformerコネクタ
                            </h3>
                            <p className="text-gray-600 mb-4">
-                                <strong>Prompt:</strong> Give me an{" "}
-                                <strong>animated</strong> architecture diagram
-                                of the ResNet50 model.
+                                <strong>プロンプト：</strong>{" "}
+                                <strong>アニメーションコネクタ</strong>
+                                付きのTransformerアーキテクチャ図を作成してください。
                            </p>
-                            <div className="bg-neutral-950 rounded-lg p-4 inline-block">
-                                <Image
-                                    src="/resnet50.svg"
-                                    alt="ResNet50モデルアーキテクチャ図"
-                                    width={480}
-                                    height={360}
-                                    className="mx-auto"
-                                />
-                            </div>
+                            <Image
+                                src="/animated_connectors.svg"
+                                alt="アニメーションコネクタ付きTransformerアーキテクチャ"
+                                width={480}
+                                height={360}
+                                className="mx-auto"
+                            />
                        </div>

-                        {/* Diagram Grid */}
+                        {/* Cloud Architecture Grid */}
                        <div className="grid md:grid-cols-2 gap-6">
                            <div className="text-center">
                                <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    RAG技術ダイアグラム
+                                    GCPアーキテクチャ図
                                </h3>
                                <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate a RAG
-                                    architecture diagram for{" "}
-                                    <strong>chat application</strong>. Use
-                                    connected diagram for data ingestion
+                                    <strong>プロンプト：</strong>{" "}
+                                    <strong>GCPアイコン</strong>
+                                    を使用してGCPアーキテクチャ図を生成してください。ユーザーがインスタンス上でホストされているフロントエンドに接続します。
                                </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
-                                    <Image
-                                        src="/rag_prod.svg"
-                                        alt="RAGアーキテクチャ図"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
-                                    />
-                                </div>
+                                <Image
+                                    src="/gcp_demo.svg"
+                                    alt="GCPアーキテクチャ図"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
+                                />
                            </div>
                            <div className="text-center">
                                <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    ReactとAWSによる認証
+                                    AWSアーキテクチャ図
                                </h3>
                                <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate
-                                    authentication process using React with{" "}
-                                    <strong>AWS</strong>. Use Serverless
-                                    architecture.
+                                    <strong>プロンプト：</strong>{" "}
+                                    <strong>AWSアイコン</strong>
+                                    を使用してAWSアーキテクチャ図を生成してください。ユーザーがインスタンス上でホストされているフロントエンドに接続します。
                                </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
-                                    <Image
-                                        src="/auth.svg"
-                                        alt="認証アーキテクチャ図"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
-                                    />
-                                </div>
+                                <Image
+                                    src="/aws_demo.svg"
+                                    alt="AWSアーキテクチャ図"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
+                                />
                            </div>
                            <div className="text-center">
                                <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    アジャイルスクラムプロセス
+                                    Azureアーキテクチャ図
                                </h3>
                                <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate agile
-                                    scrum workflow diagram for software
-                                    development team.
+                                    <strong>プロンプト：</strong>{" "}
+                                    <strong>Azureアイコン</strong>
+                                    を使用してAzureアーキテクチャ図を生成してください。ユーザーがインスタンス上でホストされているフロントエンドに接続します。
                                </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
-                                    <Image
-                                        src="/agile_scrum.svg"
-                                        alt="アジャイルスクラム図"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
-                                    />
-                                </div>
+                                <Image
+                                    src="/azure_demo.svg"
+                                    alt="Azureアーキテクチャ図"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
+                                />
                            </div>
                            <div className="text-center">
                                <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    オープンイノベーション
+                                    猫のスケッチ
                                </h3>
                                <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Create
-                                    visualization of Henry Chesbrough&apos;s
-                                    Open Innovation model.
+                                    <strong>プロンプト：</strong>{" "}
+                                    かわいい猫を描いてください。
                                </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
-                                    <Image
-                                        src="/inno.svg"
-                                        alt="オープンイノベーション図"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
-                                    />
-                                </div>
+                                <Image
+                                    src="/cat_demo.svg"
+                                    alt="猫の絵"
+                                    width={240}
+                                    height={240}
+                                    className="mx-auto"
+                                />
                            </div>
                        </div>
                    </div>
@@ -310,7 +292,7 @@ export default function AboutJA() {
                    <ul className="list-disc pl-6 text-gray-700 space-y-1">
                        <li>
                            <a
-                                href="https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio"
+                                href="https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project"
                                target="_blank"
                                rel="noopener noreferrer"
                                className="text-blue-600 hover:underline"
@@ -325,7 +307,6 @@ export default function AboutJA() {
                        </li>
                        <li>Anthropic</li>
                        <li>Google AI</li>
-                        <li>Google Vertex AI</li>
                        <li>Azure OpenAI</li>
                        <li>Ollama</li>
                        <li>OpenRouter</li>
@@ -345,7 +326,7 @@ export default function AboutJA() {
                    <p className="text-gray-700 mb-4 font-semibold">
                        デモサイトのAPIトークン使用を支援してくださった{" "}
                        <a
-                            href="https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio"
+                            href="https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project"
                            target="_blank"
                            rel="noopener noreferrer"
                            className="text-blue-600 hover:underline"
@@ -1,7 +1,7 @@
 import type { Metadata } from "next"
+import Image from "next/image"
 import Link from "next/link"
 import { FaGithub } from "react-icons/fa"
-import Image from "@/components/image-with-basepath"

 export const metadata: Metadata = {
    title: "About - Next AI Draw.io",
@@ -87,7 +87,7 @@ export default function About() {
                                    Great news! Thanks to the generous
                                    sponsorship from{" "}
                                    <a
-                                        href="https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio"
+                                        href="https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project"
                                        target="_blank"
                                        rel="noopener noreferrer"
                                        className="font-semibold text-blue-600 hover:underline"
@@ -96,7 +96,7 @@ export default function About() {
                                    </a>
                                    , the demo site now uses the powerful{" "}
                                    <span className="font-semibold text-amber-700">
-                                        glm-4.7
+                                        K2-thinking
                                    </span>{" "}
                                    model for better diagram generation! Sign up
                                    via the link to get{" "}
@@ -165,15 +165,6 @@ export default function About() {
                            Specialized support for generating AWS architecture
                            diagrams
                        </li>
-                        <li>
-                            <strong>Computed Layout</strong>: For architecture
-                            diagrams, flowcharts, swimlane diagrams, sequence
-                            diagrams, mind maps and org charts, the AI declares
-                            only the structure and the app computes every
-                            coordinate, size and arrow route — so containers fit
-                            their contents, shapes never overlap, and arrows are
-                            routed around what they would otherwise cross
-                        </li>
                        <li>
                            <strong>Animated Connectors</strong>: Create dynamic
                            and animated connectors between diagram elements for
@@ -191,106 +182,96 @@ export default function About() {
                    </p>

                    <div className="space-y-8">
-                        {/* ResNet50 Architecture */}
+                        {/* Animated Transformer */}
                        <div className="text-center">
                            <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                Animated ResNet50 Model Architecture
+                                Animated Transformer Connectors
                            </h3>
                            <p className="text-gray-600 mb-4">
                                <strong>Prompt:</strong> Give me an{" "}
-                                <strong>animated</strong> architecture diagram
-                                of the ResNet50 model.
+                                <strong>animated connector</strong> diagram of
+                                transformer&apos;s architecture.
                            </p>
-                            <div className="bg-neutral-950 rounded-lg p-4 inline-block">
-                                <Image
-                                    src="/resnet50.svg"
-                                    alt="Architecture diagram for ResNet50 model"
-                                    width={480}
-                                    height={360}
-                                    className="mx-auto"
-                                />
-                            </div>
+                            <Image
+                                src="/animated_connectors.svg"
+                                alt="Transformer Architecture with Animated Connectors"
+                                width={480}
+                                height={360}
+                                className="mx-auto"
+                            />
                        </div>

-                        {/* Diagram Grid */}
+                        {/* Cloud Architecture Grid */}
                        <div className="grid md:grid-cols-2 gap-6">
                            <div className="text-center">
                                <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    RAG Technique Diagram
+                                    GCP Architecture Diagram
                                </h3>
                                <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate a RAG
-                                    architecture diagram for{" "}
-                                    <strong>chat application</strong>. Use
-                                    connected diagram for data ingestion
+                                    <strong>Prompt:</strong> Generate a GCP
+                                    architecture diagram with{" "}
+                                    <strong>GCP icons</strong>. Users connect to
+                                    a frontend hosted on an instance.
                                </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
-                                    <Image
-                                        src="/rag_prod.svg"
-                                        alt="RAG Architecture Diagram"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
-                                    />
-                                </div>
+                                <Image
+                                    src="/gcp_demo.svg"
+                                    alt="GCP Architecture Diagram"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
+                                />
                            </div>
                            <div className="text-center">
                                <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    Authentication using React and AWS
+                                    AWS Architecture Diagram
                                </h3>
                                <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate
-                                    authentication process using React with{" "}
-                                    <strong>AWS</strong>. Use Serverless
-                                    architecture.
+                                    <strong>Prompt:</strong> Generate an AWS
+                                    architecture diagram with{" "}
+                                    <strong>AWS icons</strong>. Users connect to
+                                    a frontend hosted on an instance.
                                </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
-                                    <Image
-                                        src="/auth.svg"
-                                        alt="Authentication Architecture Diagram"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
-                                    />
-                                </div>
+                                <Image
+                                    src="/aws_demo.svg"
+                                    alt="AWS Architecture Diagram"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
+                                />
                            </div>
                            <div className="text-center">
                                <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    Agile Scrum Process
+                                    Azure Architecture Diagram
                                </h3>
                                <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate agile
-                                    scrum workflow diagram for software
-                                    development team.
+                                    <strong>Prompt:</strong> Generate an Azure
+                                    architecture diagram with{" "}
+                                    <strong>Azure icons</strong>. Users connect
+                                    to a frontend hosted on an instance.
                                </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
-                                    <Image
-                                        src="/agile_scrum.svg"
-                                        alt="Agile Scrum Diagram"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
-                                    />
-                                </div>
+                                <Image
+                                    src="/azure_demo.svg"
+                                    alt="Azure Architecture Diagram"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
+                                />
                            </div>
                            <div className="text-center">
                                <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    Open Innovation
+                                    Cat Sketch
                                </h3>
                                <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Create
-                                    visualization of Henry Chesbrough&apos;s
-                                    Open Innovation model.
+                                    <strong>Prompt:</strong> Draw a cute cat for
+                                    me.
                                </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
-                                    <Image
-                                        src="/inno.svg"
-                                        alt="Open Innovation Diagram"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
-                                    />
-                                </div>
+                                <Image
+                                    src="/cat_demo.svg"
+                                    alt="Cat Drawing"
+                                    width={240}
+                                    height={240}
+                                    className="mx-auto"
+                                />
                            </div>
                        </div>
                    </div>
@@ -330,7 +311,7 @@ export default function About() {
                    <ul className="list-disc pl-6 text-gray-700 space-y-1">
                        <li>
                            <a
-                                href="https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio"
+                                href="https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project"
                                target="_blank"
                                rel="noopener noreferrer"
                                className="text-blue-600 hover:underline"
@@ -345,7 +326,6 @@ export default function About() {
                        </li>
                        <li>Anthropic</li>
                        <li>Google AI</li>
-                        <li>Google Vertex AI</li>
                        <li>Azure OpenAI</li>
                        <li>Ollama</li>
                        <li>OpenRouter</li>
@@ -367,7 +347,7 @@ export default function About() {
                    <p className="text-gray-700 mb-4 font-semibold">
                        Special thanks to{" "}
                        <a
-                            href="https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio"
+                            href="https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project"
                            target="_blank"
                            rel="noopener noreferrer"
                            className="text-blue-600 hover:underline"
@@ -1,65 +0,0 @@
-import { getApiEndpoint } from "@/lib/base-path"
-import type { ProviderName } from "@/lib/types/model-config"
-
-export const SESSION_PASSWORD_KEY = "next-ai-draw-io-admin-password"
-
-// ── Shared types ─────────────────────────────────────────────────────
-
-export type SecretValue = { isSet: true; hint: string }
-
-export function isSecretValue(v: unknown): v is SecretValue {
-    return typeof v === "object" && v !== null && "isSet" in v
-}
-
-export interface SettingState {
-    key: string
-    source: "file" | "env" | "default"
-    value: string | SecretValue | null
-}
-
-export type SettingsMap = Record<string, SettingState>
-
-// Editable text of a saved setting; secrets have none (write-only)
-export function savedTextOf(state: SettingState | undefined): string {
-    return state && !isSecretValue(state.value) ? (state.value ?? "") : ""
-}
-
-// Admin provider in client state. Secret fields hold either a masked
-// marker (unchanged) or a plaintext string (new value).
-export interface AdminProvider {
-    id: string
-    provider: ProviderName
-    name?: string
-    apiKey?: string | SecretValue
-    baseUrl?: string
-    awsAccessKeyId?: string | SecretValue
-    awsSecretAccessKey?: string | SecretValue
-    awsRegion?: string
-    vertexApiKey?: string | SecretValue
-    models: string[]
-    isDefault?: boolean
-}
-
-// Provider defined in AI_MODELS_CONFIG / ai-models.json — shown read-only
-export interface EnvProvider {
-    name: string
-    provider: ProviderName
-    models: string[]
-    isDefault: boolean
-}
-
-export async function adminFetch(path: string, pw: string, init?: RequestInit) {
-    const res = await fetch(getApiEndpoint(path), {
-        ...init,
-        headers: {
-            ...init?.headers,
-            "x-admin-password": pw,
-            ...(init?.body ? { "Content-Type": "application/json" } : {}),
-        },
-    })
-    const data = await res.json().catch(() => ({}))
-    if (!res.ok) {
-        throw new Error(data.error || `Request failed (${res.status})`)
-    }
-    return data
-}
@@ -1,609 +0,0 @@
-import {
-    AlertCircle,
-    Check,
-    Loader2,
-    Plus,
-    Star,
-    Trash2,
-    X,
-    Zap,
-} from "lucide-react"
-import { useState } from "react"
-import { ProviderCredentialsFields } from "@/components/provider-credentials-fields"
-import { ProviderLogo } from "@/components/provider-logo"
-import {
-    AlertDialog,
-    AlertDialogAction,
-    AlertDialogCancel,
-    AlertDialogContent,
-    AlertDialogDescription,
-    AlertDialogFooter,
-    AlertDialogHeader,
-    AlertDialogTitle,
-} from "@/components/ui/alert-dialog"
-import { Button } from "@/components/ui/button"
-import { Input } from "@/components/ui/input"
-import { Label } from "@/components/ui/label"
-import {
-    Select,
-    SelectContent,
-    SelectItem,
-    SelectTrigger,
-} from "@/components/ui/select"
-import { Switch } from "@/components/ui/switch"
-import { useDictionary } from "@/hooks/use-dictionary"
-import { formatMessage } from "@/lib/i18n/utils"
-import {
-    FIXED_CRED_PROVIDERS,
-    PROVIDER_INFO,
-    type ProviderName,
-    SUGGESTED_MODELS,
-} from "@/lib/types/model-config"
-import { cn } from "@/lib/utils"
-import {
-    type AdminProvider,
-    adminFetch,
-    type EnvProvider,
-} from "./admin-shared"
-import { SecretInput } from "./setting-field"
-
-// ── Models section (mirrors the user ModelConfigDialog) ──────────────
-
-function ProviderDetail({
-    provider,
-    disabled,
-    password,
-    onUpdate,
-    onDelete,
-}: {
-    provider: AdminProvider
-    disabled: boolean
-    password: string
-    onUpdate: (patch: Partial<AdminProvider>) => void
-    onDelete: () => void
-}) {
-    const dict = useDictionary()
-    const [modelInput, setModelInput] = useState("")
-    const [deleteOpen, setDeleteOpen] = useState(false)
-    const [testing, setTesting] = useState<string | null>(null)
-    const [testResults, setTestResults] = useState<
-        Record<string, { ok: boolean; message: string }>
-    >({})
-
-    const info = PROVIDER_INFO[provider.provider]
-    const suggestions = (SUGGESTED_MODELS[provider.provider] || []).filter(
-        (m) => !provider.models.includes(m),
-    )
-
-    const addModel = (modelId: string) => {
-        const trimmed = modelId.trim()
-        if (!trimmed || provider.models.includes(trimmed)) return
-        onUpdate({ models: [...provider.models, trimmed] })
-        setModelInput("")
-    }
-
-    const testModel = async (modelId: string) => {
-        setTesting(modelId)
-        try {
-            const data = await adminFetch("/api/admin/test-model", password, {
-                method: "POST",
-                body: JSON.stringify({ provider, modelId }),
-            })
-            setTestResults((prev) => ({
-                ...prev,
-                [modelId]: data.valid
-                    ? {
-                          ok: true,
-                          message: formatMessage(dict.admin.testOk, {
-                              ms: data.responseTime,
-                          }),
-                      }
-                    : {
-                          ok: false,
-                          message: data.error || dict.admin.testFailed,
-                      },
-            }))
-        } catch (err) {
-            setTestResults((prev) => ({
-                ...prev,
-                [modelId]: {
-                    ok: false,
-                    message:
-                        err instanceof Error
-                            ? err.message
-                            : dict.admin.testFailed,
-                },
-            }))
-        } finally {
-            setTesting(null)
-        }
-    }
-
-    return (
-        <div className="space-y-6">
-            <div className="flex items-center gap-3">
-                <div className="flex h-10 w-10 items-center justify-center rounded-lg bg-muted">
-                    <ProviderLogo
-                        provider={provider.provider}
-                        className="size-5"
-                    />
-                </div>
-                <div className="min-w-0 flex-1">
-                    <h3 className="font-semibold">{info.label}</h3>
-                    <p className="text-xs text-muted-foreground">
-                        {provider.models.length === 0
-                            ? dict.admin.noModelsConfigured
-                            : formatMessage(
-                                  provider.models.length === 1
-                                      ? dict.admin.modelCount
-                                      : dict.admin.modelCountPlural,
-                                  { count: provider.models.length },
-                              )}
-                    </p>
-                </div>
-                <label className="flex cursor-pointer items-center gap-1.5 text-xs text-muted-foreground">
-                    <Star
-                        className={cn(
-                            "h-3.5 w-3.5",
-                            provider.isDefault &&
-                                "fill-amber-400 text-amber-400",
-                        )}
-                        aria-hidden="true"
-                    />
-                    {dict.admin.default}
-                    <Switch
-                        checked={!!provider.isDefault}
-                        disabled={disabled}
-                        aria-label={dict.admin.setAsDefault}
-                        onCheckedChange={(checked) =>
-                            onUpdate({ isDefault: checked })
-                        }
-                    />
-                </label>
-                <Button
-                    type="button"
-                    variant="ghost"
-                    size="sm"
-                    disabled={disabled}
-                    className="text-destructive hover:bg-destructive/10 hover:text-destructive"
-                    onClick={() => setDeleteOpen(true)}
-                >
-                    <Trash2 className="mr-1.5 h-4 w-4" aria-hidden="true" />
-                    {dict.admin.delete}
-                </Button>
-            </div>
-
-            {/* Credentials (shared with the user ModelConfigDialog) */}
-            <ProviderCredentialsFields
-                provider={provider.provider}
-                name={provider.name}
-                baseUrl={provider.baseUrl}
-                awsRegion={provider.awsRegion}
-                disabled={disabled}
-                onChange={(field, value) => onUpdate({ [field]: value })}
-                renderSecret={({ field, id }) => (
-                    // Bare id keeps the shared component's <Label htmlFor={id}>
-                    // associated; only one ProviderDetail is mounted at a time.
-                    <SecretInput
-                        id={id}
-                        keepOnEmpty
-                        value={provider[field]}
-                        disabled={disabled}
-                        onChange={(v) => onUpdate({ [field]: v })}
-                    />
-                )}
-            />
-
-            {/* Models */}
-            <div>
-                <div className="mb-2 flex flex-wrap items-center justify-between gap-2">
-                    <Label className="text-xs font-medium uppercase tracking-wider text-muted-foreground">
-                        {dict.admin.models}
-                    </Label>
-                    <div className="flex items-center gap-1.5">
-                        <Input
-                            value={modelInput}
-                            disabled={disabled}
-                            placeholder={dict.admin.modelIdPlaceholder}
-                            spellCheck={false}
-                            className="h-8 w-48 font-mono text-xs"
-                            onChange={(e) => setModelInput(e.target.value)}
-                            onKeyDown={(e) => {
-                                if (e.key === "Enter") addModel(modelInput)
-                            }}
-                        />
-                        <Button
-                            type="button"
-                            variant="outline"
-                            size="sm"
-                            className="h-8"
-                            disabled={disabled || !modelInput.trim()}
-                            aria-label={dict.admin.addModel}
-                            onClick={() => addModel(modelInput)}
-                        >
-                            <Plus className="h-3.5 w-3.5" aria-hidden="true" />
-                        </Button>
-                        {suggestions.length > 0 && (
-                            <Select
-                                disabled={disabled}
-                                onValueChange={(v) => addModel(v)}
-                            >
-                                <SelectTrigger className="h-8 w-28 text-xs">
-                                    {dict.admin.suggested}
-                                </SelectTrigger>
-                                <SelectContent className="max-h-72">
-                                    {suggestions.map((m) => (
-                                        <SelectItem
-                                            key={m}
-                                            value={m}
-                                            className="font-mono text-xs"
-                                        >
-                                            {m}
-                                        </SelectItem>
-                                    ))}
-                                </SelectContent>
-                            </Select>
-                        )}
-                    </div>
-                </div>
-                <div className="overflow-hidden rounded-lg border">
-                    {provider.models.length === 0 ? (
-                        <p className="p-5 text-center text-sm text-muted-foreground">
-                            {dict.admin.addProviderToOfferModels}
-                        </p>
-                    ) : (
-                        <ul className="divide-y">
-                            {provider.models.map((modelId, index) => {
-                                const result = testResults[modelId]
-                                return (
-                                    <li
-                                        key={modelId}
-                                        className="flex items-center gap-2 px-3 py-2"
-                                    >
-                                        <span className="min-w-0 flex-1 truncate font-mono text-xs">
-                                            {modelId}
-                                            {provider.isDefault &&
-                                                index === 0 && (
-                                                    <span className="ml-2 rounded bg-amber-500/10 px-1.5 py-0.5 text-[10px] font-medium uppercase text-amber-600 dark:text-amber-400">
-                                                        {
-                                                            dict.admin
-                                                                .defaultModel
-                                                        }
-                                                    </span>
-                                                )}
-                                        </span>
-                                        {result && (
-                                            <span
-                                                className={cn(
-                                                    "flex items-center gap-1 text-xs",
-                                                    result.ok
-                                                        ? "text-green-600 dark:text-green-400"
-                                                        : "text-destructive",
-                                                )}
-                                            >
-                                                {result.ok ? (
-                                                    <Check
-                                                        className="h-3.5 w-3.5"
-                                                        aria-hidden="true"
-                                                    />
-                                                ) : (
-                                                    <AlertCircle
-                                                        className="h-3.5 w-3.5"
-                                                        aria-hidden="true"
-                                                    />
-                                                )}
-                                                <span className="max-w-48 truncate">
-                                                    {result.message}
-                                                </span>
-                                            </span>
-                                        )}
-                                        <Button
-                                            type="button"
-                                            variant="ghost"
-                                            size="sm"
-                                            className="h-7 px-2 text-xs"
-                                            disabled={
-                                                disabled || testing !== null
-                                            }
-                                            onClick={() =>
-                                                void testModel(modelId)
-                                            }
-                                        >
-                                            {testing === modelId ? (
-                                                <Loader2
-                                                    className="h-3.5 w-3.5 animate-spin motion-reduce:animate-none"
-                                                    aria-hidden="true"
-                                                />
-                                            ) : (
-                                                <Zap
-                                                    className="h-3.5 w-3.5"
-                                                    aria-hidden="true"
-                                                />
-                                            )}
-                                            <span className="ml-1">
-                                                {dict.admin.test}
-                                            </span>
-                                        </Button>
-                                        <Button
-                                            type="button"
-                                            variant="ghost"
-                                            size="icon"
-                                            className="h-7 w-7"
-                                            disabled={disabled}
-                                            aria-label={formatMessage(
-                                                dict.admin.removeModel,
-                                                { model: modelId },
-                                            )}
-                                            onClick={() =>
-                                                onUpdate({
-                                                    models: provider.models.filter(
-                                                        (m) => m !== modelId,
-                                                    ),
-                                                })
-                                            }
-                                        >
-                                            <X
-                                                className="h-3.5 w-3.5"
-                                                aria-hidden="true"
-                                            />
-                                        </Button>
-                                    </li>
-                                )
-                            })}
-                        </ul>
-                    )}
-                </div>
-            </div>
-
-            <AlertDialog open={deleteOpen} onOpenChange={setDeleteOpen}>
-                <AlertDialogContent>
-                    <AlertDialogHeader>
-                        <AlertDialogTitle>
-                            {formatMessage(dict.admin.deleteProviderTitle, {
-                                name: provider.name || info.label,
-                            })}
-                        </AlertDialogTitle>
-                        <AlertDialogDescription>
-                            {dict.admin.deleteProviderDesc}
-                        </AlertDialogDescription>
-                    </AlertDialogHeader>
-                    <AlertDialogFooter>
-                        <AlertDialogCancel>
-                            {dict.admin.cancel}
-                        </AlertDialogCancel>
-                        <AlertDialogAction
-                            className="bg-destructive text-destructive-foreground hover:bg-destructive/90"
-                            onClick={() => {
-                                setDeleteOpen(false)
-                                onDelete()
-                            }}
-                        >
-                            {dict.admin.delete}
-                        </AlertDialogAction>
-                    </AlertDialogFooter>
-                </AlertDialogContent>
-            </AlertDialog>
-        </div>
-    )
-}
-
-export function ModelsSection({
-    providers,
-    envProviders,
-    disabled,
-    password,
-    onChange,
-}: {
-    providers: AdminProvider[]
-    envProviders: EnvProvider[]
-    disabled: boolean
-    password: string
-    onChange: (providers: AdminProvider[]) => void
-}) {
-    const dict = useDictionary()
-    const [selectedId, setSelectedId] = useState<string | null>(
-        providers[0]?.id ?? null,
-    )
-    const selected = providers.find((p) => p.id === selectedId)
-    const selectedEnv = envProviders.find((p) => `env:${p.name}` === selectedId)
-
-    const addProvider = (provider: ProviderName) => {
-        const newProvider: AdminProvider = {
-            id: crypto.randomUUID(),
-            provider,
-            models: [],
-            isDefault: providers.length === 0,
-        }
-        onChange([...providers, newProvider])
-        setSelectedId(newProvider.id)
-    }
-
-    const updateProvider = (id: string, patch: Partial<AdminProvider>) => {
-        onChange(
-            providers.map((p) => {
-                if (p.id !== id) {
-                    // Only one default at a time
-                    return patch.isDefault ? { ...p, isDefault: false } : p
-                }
-                return { ...p, ...patch }
-            }),
-        )
-    }
-
-    const deleteProvider = (id: string) => {
-        const next = providers.filter((p) => p.id !== id)
-        onChange(next)
-        setSelectedId(next[0]?.id ?? null)
-    }
-
-    return (
-        <div className="flex min-h-72 flex-col sm:flex-row">
-            {/* Provider list */}
-            <div className="flex w-full shrink-0 flex-col border-b sm:w-52 sm:border-b-0 sm:border-r">
-                <div className="flex-1 space-y-1 p-2">
-                    {providers.length === 0 && envProviders.length === 0 && (
-                        <p className="px-2 py-6 text-center text-xs text-muted-foreground">
-                            {dict.admin.addProviderHint}
-                        </p>
-                    )}
-                    {envProviders.map((p) => (
-                        <button
-                            key={`env:${p.name}`}
-                            type="button"
-                            onClick={() => setSelectedId(`env:${p.name}`)}
-                            className={cn(
-                                "flex w-full items-center gap-2 rounded-md px-2.5 py-2 text-left text-sm hover:bg-muted/60 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring",
-                                selectedId === `env:${p.name}` &&
-                                    "bg-muted font-medium",
-                            )}
-                        >
-                            <ProviderLogo provider={p.provider} />
-                            <span className="min-w-0 flex-1 truncate">
-                                {p.name}
-                            </span>
-                            <span className="rounded bg-muted px-1 py-0.5 text-[10px] font-medium uppercase text-muted-foreground">
-                                {dict.admin.sourceEnv}
-                            </span>
-                            {p.isDefault && (
-                                <Star
-                                    className="h-3.5 w-3.5 shrink-0 fill-amber-400 text-amber-400"
-                                    aria-label={dict.admin.defaultProvider}
-                                />
-                            )}
-                        </button>
-                    ))}
-                    {providers.map((p) => (
-                        <button
-                            key={p.id}
-                            type="button"
-                            onClick={() => setSelectedId(p.id)}
-                            className={cn(
-                                "flex w-full items-center gap-2 rounded-md px-2.5 py-2 text-left text-sm hover:bg-muted/60 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring",
-                                selectedId === p.id && "bg-muted font-medium",
-                            )}
-                        >
-                            <ProviderLogo provider={p.provider} />
-                            <span className="min-w-0 flex-1 truncate">
-                                {p.name || PROVIDER_INFO[p.provider].label}
-                            </span>
-                            {p.isDefault && (
-                                <Star
-                                    className="h-3.5 w-3.5 shrink-0 fill-amber-400 text-amber-400"
-                                    aria-label={dict.admin.defaultProvider}
-                                />
-                            )}
-                        </button>
-                    ))}
-                </div>
-                <div className="border-t p-2">
-                    <Select
-                        disabled={disabled}
-                        onValueChange={(v) => addProvider(v as ProviderName)}
-                    >
-                        <SelectTrigger className="w-full">
-                            <Plus
-                                className="mr-1 h-4 w-4 text-muted-foreground"
-                                aria-hidden="true"
-                            />
-                            {dict.modelConfig.addProvider}
-                        </SelectTrigger>
-                        <SelectContent className="max-h-72">
-                            {(Object.keys(PROVIDER_INFO) as ProviderName[]).map(
-                                (p) => {
-                                    // Global-credential providers already in
-                                    // the env config can't be added here —
-                                    // panel credentials would override theirs
-                                    const envBlocked =
-                                        FIXED_CRED_PROVIDERS.includes(p) &&
-                                        envProviders.some(
-                                            (e) => e.provider === p,
-                                        )
-                                    return (
-                                        <SelectItem
-                                            key={p}
-                                            value={p}
-                                            disabled={envBlocked}
-                                        >
-                                            <div className="flex items-center gap-2">
-                                                <ProviderLogo provider={p} />
-                                                {PROVIDER_INFO[p].label}
-                                                {envBlocked && (
-                                                    <span className="text-xs text-muted-foreground">
-                                                        {
-                                                            dict.admin
-                                                                .managedViaEnv
-                                                        }
-                                                    </span>
-                                                )}
-                                            </div>
-                                        </SelectItem>
-                                    )
-                                },
-                            )}
-                        </SelectContent>
-                    </Select>
-                </div>
-            </div>
-
-            {/* Detail */}
-            <div className="min-w-0 flex-1 p-4">
-                {selected ? (
-                    <ProviderDetail
-                        key={selected.id}
-                        provider={selected}
-                        disabled={disabled}
-                        password={password}
-                        onUpdate={(patch) => updateProvider(selected.id, patch)}
-                        onDelete={() => deleteProvider(selected.id)}
-                    />
-                ) : selectedEnv ? (
-                    <div className="space-y-4">
-                        <div className="flex items-center gap-3">
-                            <div className="flex h-10 w-10 items-center justify-center rounded-lg bg-muted">
-                                <ProviderLogo
-                                    provider={selectedEnv.provider}
-                                    className="size-5"
-                                />
-                            </div>
-                            <div className="min-w-0 flex-1">
-                                <h3 className="font-semibold">
-                                    {selectedEnv.name}
-                                </h3>
-                                <p className="text-xs text-muted-foreground">
-                                    {dict.admin.envReadOnly}
-                                </p>
-                            </div>
-                        </div>
-                        <div className="overflow-hidden rounded-lg border">
-                            <ul className="divide-y">
-                                {selectedEnv.models.map((modelId, index) => (
-                                    <li
-                                        key={modelId}
-                                        className="flex items-center gap-2 px-3 py-2"
-                                    >
-                                        <span className="min-w-0 flex-1 truncate font-mono text-xs">
-                                            {modelId}
-                                            {selectedEnv.isDefault &&
-                                                index === 0 && (
-                                                    <span className="ml-2 rounded bg-amber-500/10 px-1.5 py-0.5 text-[10px] font-medium uppercase text-amber-600 dark:text-amber-400">
-                                                        {
-                                                            dict.admin
-                                                                .defaultModel
-                                                        }
-                                                    </span>
-                                                )}
-                                        </span>
-                                    </li>
-                                ))}
-                            </ul>
-                        </div>
-                    </div>
-                ) : (
-                    <p className="py-12 text-center text-sm text-muted-foreground">
-                        {dict.admin.selectProviderHint}
-                    </p>
-                )}
-            </div>
-        </div>
-    )
-}
@@ -1,610 +0,0 @@
-"use client"
-
-import {
-    AlertTriangle,
-    Check,
-    Loader2,
-    LockKeyhole,
-    ShieldCheck,
-} from "lucide-react"
-import { useCallback, useEffect, useState } from "react"
-import { Button } from "@/components/ui/button"
-import { Input } from "@/components/ui/input"
-import { Label } from "@/components/ui/label"
-import { Switch } from "@/components/ui/switch"
-import { useDictionary } from "@/hooks/use-dictionary"
-import {
-    SETTING_GROUPS,
-    SETTINGS_BY_GROUP,
-} from "@/lib/admin/settings-registry"
-import { getApiEndpoint } from "@/lib/base-path"
-import { formatMessage } from "@/lib/i18n/utils"
-import { cn } from "@/lib/utils"
-import {
-    type AdminProvider,
-    adminFetch,
-    type EnvProvider,
-    isSecretValue,
-    SESSION_PASSWORD_KEY,
-    type SettingState,
-    type SettingsMap,
-    savedTextOf,
-} from "./admin-shared"
-import { ModelsSection } from "./models-section"
-import { SettingField } from "./setting-field"
-
-// ── Page ─────────────────────────────────────────────────────────────
-
-const NAV_GROUP_IDS = ["models", ...SETTING_GROUPS.map((g) => g.id)]
-
-export default function AdminPage() {
-    const dict = useDictionary()
-    // Localized group title/description, keyed by group id
-    const groupText = (id: string) =>
-        (
-            dict.admin.groups as Record<
-                string,
-                { title: string; description: string } | undefined
-            >
-        )[id]
-    const navItems = NAV_GROUP_IDS.map((id) => ({
-        id,
-        title:
-            id === "models" ? dict.admin.models : (groupText(id)?.title ?? id),
-    }))
-    const [password, setPassword] = useState("")
-    const [authedPassword, setAuthedPassword] = useState<string | null>(null)
-    const [authError, setAuthError] = useState("")
-    const [authLoading, setAuthLoading] = useState(false)
-
-    const [writable, setWritable] = useState(true)
-
-    // Models section state
-    const [providers, setProviders] = useState<AdminProvider[]>([])
-    const [envProviders, setEnvProviders] = useState<EnvProvider[]>([])
-    const [savedProviders, setSavedProviders] = useState<string>("[]")
-    const providersDirty = JSON.stringify(providers) !== savedProviders
-
-    // General settings state
-    const [settings, setSettings] = useState<SettingsMap>({})
-    const [pending, setPending] = useState<Record<string, string | null>>({})
-    const [errors, setErrors] = useState<Record<string, string>>({})
-    const [enabledGroups, setEnabledGroups] = useState<Record<string, boolean>>(
-        {},
-    )
-
-    const [saving, setSaving] = useState(false)
-    const [saveMessage, setSaveMessage] = useState<{
-        ok: boolean
-        text: string
-    } | null>(null)
-    const [activeGroup, setActiveGroup] = useState("models")
-
-    const dirtyCount = Object.keys(pending).length + (providersDirty ? 1 : 0)
-
-    const applySettingsResponse = useCallback(
-        (data: { writable: boolean; settings: SettingState[] }) => {
-            setWritable(data.writable)
-            const map: SettingsMap = {}
-            for (const s of data.settings) map[s.key] = s
-            setSettings(map)
-            // Seed each toggle once from whether the group has configured
-            // values; don't stomp a user's explicit toggle on later saves
-            setEnabledGroups((prev) => {
-                const next = { ...prev }
-                for (const group of SETTING_GROUPS) {
-                    if (!group.toggleable || group.id in next) continue
-                    next[group.id] = !!SETTINGS_BY_GROUP.get(group.id)?.some(
-                        (d) => map[d.key]?.source !== "default",
-                    )
-                }
-                return next
-            })
-        },
-        [],
-    )
-
-    const applyProvidersResponse = useCallback(
-        (data: {
-            providers: AdminProvider[]
-            envProviders?: EnvProvider[]
-        }) => {
-            setProviders(data.providers)
-            setSavedProviders(JSON.stringify(data.providers))
-            setEnvProviders(data.envProviders ?? [])
-        },
-        [],
-    )
-
-    const login = useCallback(
-        async (pw: string) => {
-            setAuthLoading(true)
-            setAuthError("")
-            try {
-                const [settingsData, providersData] = await Promise.all([
-                    adminFetch("/api/admin/settings", pw),
-                    adminFetch("/api/admin/providers", pw),
-                ])
-                applySettingsResponse(settingsData)
-                applyProvidersResponse(providersData)
-                setAuthedPassword(pw)
-                sessionStorage.setItem(SESSION_PASSWORD_KEY, pw)
-            } catch (err) {
-                setAuthError(
-                    err instanceof Error ? err.message : dict.admin.loginFailed,
-                )
-            } finally {
-                setAuthLoading(false)
-            }
-        },
-        [applySettingsResponse, applyProvidersResponse, dict],
-    )
-
-    // Restore session on mount
-    useEffect(() => {
-        const stored = sessionStorage.getItem(SESSION_PASSWORD_KEY)
-        if (stored) void login(stored)
-    }, [login])
-
-    // Warn before leaving with unsaved changes
-    const hasDirty = dirtyCount > 0
-    useEffect(() => {
-        if (!hasDirty) return
-        const handler = (e: BeforeUnloadEvent) => {
-            e.preventDefault()
-            // Some browsers only show the prompt when returnValue is set
-            e.returnValue = ""
-        }
-        window.addEventListener("beforeunload", handler)
-        return () => window.removeEventListener("beforeunload", handler)
-    }, [hasDirty])
-
-    // Highlight the section currently in view in the sidebar
-    useEffect(() => {
-        if (!authedPassword) return
-        const observer = new IntersectionObserver(
-            (entries) => {
-                const visible = entries
-                    .filter((e) => e.isIntersecting)
-                    .sort(
-                        (a, b) =>
-                            a.boundingClientRect.top - b.boundingClientRect.top,
-                    )
-                if (visible[0]) setActiveGroup(visible[0].target.id)
-            },
-            { rootMargin: "-10% 0px -50% 0px" },
-        )
-        for (const id of NAV_GROUP_IDS) {
-            const el = document.getElementById(id)
-            if (el) observer.observe(el)
-        }
-        return () => observer.disconnect()
-    }, [authedPassword])
-
-    const handleChange = useCallback(
-        (key: string, value: string | null) => {
-            setSaveMessage(null)
-            setErrors((prev) => {
-                if (!(key in prev)) return prev
-                const next = { ...prev }
-                delete next[key]
-                return next
-            })
-            setPending((prev) => {
-                const state = settings[key]
-                const isRevert =
-                    value !== null &&
-                    state?.source === "file" &&
-                    !isSecretValue(state?.value) &&
-                    value === savedTextOf(state)
-                const isNoop =
-                    value === "" &&
-                    (!state || state.source !== "file") &&
-                    !isSecretValue(state?.value)
-                if (isRevert || isNoop) {
-                    const next = { ...prev }
-                    delete next[key]
-                    return next
-                }
-                return { ...prev, [key]: value === "" ? null : value }
-            })
-        },
-        [settings],
-    )
-
-    // Toggling a group off stages deletion of its saved values so the
-    // feature actually turns off on save; toggling on drops those deletions.
-    const handleGroupToggle = useCallback(
-        (groupId: string, enabled: boolean) => {
-            setSaveMessage(null)
-            setEnabledGroups((prev) => ({ ...prev, [groupId]: enabled }))
-            const keys = (SETTINGS_BY_GROUP.get(groupId) ?? []).map(
-                (d) => d.key,
-            )
-            setPending((prev) => {
-                const next = { ...prev }
-                for (const key of keys) {
-                    if (!enabled) {
-                        // Stage deletion only for values currently set
-                        if (settings[key]?.source !== "default")
-                            next[key] = null
-                    } else if (next[key] === null) {
-                        delete next[key]
-                    }
-                }
-                return next
-            })
-        },
-        [settings],
-    )
-
-    const handleSave = useCallback(async () => {
-        if (!authedPassword || dirtyCount === 0) return
-        setSaving(true)
-        setSaveMessage(null)
-        setErrors({})
-        try {
-            if (providersDirty) {
-                const data = await adminFetch(
-                    "/api/admin/providers",
-                    authedPassword,
-                    { method: "PUT", body: JSON.stringify({ providers }) },
-                )
-                applyProvidersResponse(data)
-            }
-            if (Object.keys(pending).length > 0) {
-                const res = await fetch(getApiEndpoint("/api/admin/settings"), {
-                    method: "PUT",
-                    headers: {
-                        "Content-Type": "application/json",
-                        "x-admin-password": authedPassword,
-                    },
-                    body: JSON.stringify({ values: pending }),
-                })
-                const data = await res.json().catch(() => ({}))
-                if (!res.ok) {
-                    // Per-field validation errors come back as {errors: {...}}
-                    if (data.errors) {
-                        setErrors(data.errors)
-                        const firstKey = Object.keys(data.errors)[0]
-                        document.getElementById(`setting-${firstKey}`)?.focus()
-                        throw new Error(dict.admin.invalidSettings)
-                    }
-                    throw new Error(
-                        data.error || `Request failed (${res.status})`,
-                    )
-                }
-                applySettingsResponse(data)
-                setPending({})
-            }
-            setSaveMessage({
-                ok: true,
-                text: dict.admin.saved,
-            })
-            setTimeout(() => setSaveMessage(null), 4000)
-        } catch (err) {
-            setSaveMessage({
-                ok: false,
-                text:
-                    err instanceof Error ? err.message : dict.admin.saveFailed,
-            })
-        } finally {
-            setSaving(false)
-        }
-    }, [
-        authedPassword,
-        pending,
-        providers,
-        providersDirty,
-        dirtyCount,
-        applySettingsResponse,
-        applyProvidersResponse,
-        dict,
-    ])
-
-    // ── Login screen ─────────────────────────────────────────────────
-    if (!authedPassword) {
-        return (
-            <div className="flex min-h-screen items-center justify-center bg-background p-4">
-                <form
-                    className="w-full max-w-sm space-y-4 rounded-lg border bg-card p-6 shadow-sm"
-                    onSubmit={(e) => {
-                        e.preventDefault()
-                        void login(password)
-                    }}
-                >
-                    <div className="flex items-center gap-2">
-                        <LockKeyhole
-                            className="h-5 w-5 text-muted-foreground"
-                            aria-hidden="true"
-                        />
-                        <h1 className="text-lg font-semibold">
-                            {dict.admin.title}
-                        </h1>
-                    </div>
-                    <p className="text-sm text-muted-foreground">
-                        {dict.admin.loginPrompt}
-                    </p>
-                    <div className="space-y-1.5">
-                        <Label htmlFor="admin-password">
-                            {dict.admin.password}
-                        </Label>
-                        <Input
-                            id="admin-password"
-                            name="admin-password"
-                            type="password"
-                            value={password}
-                            autoComplete="current-password"
-                            spellCheck={false}
-                            onChange={(e) => setPassword(e.target.value)}
-                        />
-                    </div>
-                    <p
-                        className={cn(
-                            "text-sm text-destructive",
-                            !authError && "sr-only",
-                        )}
-                        aria-live="polite"
-                    >
-                        {authError}
-                    </p>
-                    <Button
-                        type="submit"
-                        className="w-full"
-                        disabled={authLoading}
-                    >
-                        {authLoading ? (
-                            <>
-                                <Loader2
-                                    className="mr-2 h-4 w-4 animate-spin motion-reduce:animate-none"
-                                    aria-hidden="true"
-                                />
-                                {dict.admin.signingIn}
-                            </>
-                        ) : (
-                            dict.admin.signIn
-                        )}
-                    </Button>
-                </form>
-            </div>
-        )
-    }
-
-    // ── Settings screen ──────────────────────────────────────────────
-    return (
-        <div className="min-h-screen bg-background">
-            <header className="sticky top-0 z-20 border-b bg-background/95 backdrop-blur">
-                <div className="mx-auto flex max-w-6xl items-center justify-between px-4 py-3">
-                    <div className="flex items-center gap-2">
-                        <ShieldCheck
-                            className="h-5 w-5 text-primary"
-                            aria-hidden="true"
-                        />
-                        <h1 className="text-lg font-semibold">
-                            {dict.admin.title}
-                        </h1>
-                    </div>
-                    <p className="text-xs text-muted-foreground">
-                        {dict.admin.precedence}
-                    </p>
-                </div>
-            </header>
-
-            {!writable && (
-                <div className="border-b bg-amber-500/10">
-                    <div className="mx-auto flex max-w-6xl items-center gap-2 px-4 py-3 text-sm text-amber-700 dark:text-amber-400">
-                        <AlertTriangle
-                            className="h-4 w-4 shrink-0"
-                            aria-hidden="true"
-                        />
-                        {dict.admin.notWritable}
-                    </div>
-                </div>
-            )}
-
-            <div className="mx-auto flex max-w-6xl gap-8 px-4 py-6">
-                <nav
-                    aria-label={dict.admin.settingGroups}
-                    className="sticky top-20 hidden h-fit w-44 shrink-0 md:block"
-                >
-                    <ul className="space-y-1">
-                        {navItems.map((item) => (
-                            <li key={item.id}>
-                                <a
-                                    href={`#${item.id}`}
-                                    aria-current={
-                                        activeGroup === item.id
-                                            ? "true"
-                                            : undefined
-                                    }
-                                    className={cn(
-                                        "block rounded-md px-3 py-1.5 text-sm hover:bg-muted hover:text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring",
-                                        activeGroup === item.id
-                                            ? "bg-muted font-medium text-foreground"
-                                            : "text-muted-foreground",
-                                    )}
-                                >
-                                    {item.title}
-                                </a>
-                            </li>
-                        ))}
-                    </ul>
-                </nav>
-
-                <main className="min-w-0 flex-1 pb-24">
-                    {/* Models section */}
-                    <section aria-labelledby="models" className="mb-10">
-                        <h2
-                            id="models"
-                            className="scroll-mt-20 text-base font-semibold"
-                        >
-                            {dict.admin.models}
-                        </h2>
-                        <p className="mb-3 mt-1 text-sm text-muted-foreground text-pretty">
-                            {dict.admin.modelsDescription}
-                        </p>
-                        <div className="overflow-hidden rounded-lg border bg-card">
-                            <ModelsSection
-                                providers={providers}
-                                envProviders={envProviders}
-                                disabled={!writable || saving}
-                                password={authedPassword}
-                                onChange={(next) => {
-                                    setSaveMessage(null)
-                                    setProviders(next)
-                                }}
-                            />
-                        </div>
-                    </section>
-
-                    {/* Registry-driven groups */}
-                    {SETTING_GROUPS.map((group) => {
-                        const defs = SETTINGS_BY_GROUP.get(group.id) ?? []
-                        const groupOff =
-                            group.toggleable && !enabledGroups[group.id]
-                        const fieldsDisabled = !writable || saving || !!groupOff
-                        const gt = groupText(group.id)
-                        const title = gt?.title ?? group.title
-                        return (
-                            <section
-                                key={group.id}
-                                aria-labelledby={group.id}
-                                className="mb-10"
-                            >
-                                <div className="flex items-center justify-between gap-4">
-                                    <h2
-                                        id={group.id}
-                                        className="scroll-mt-20 text-base font-semibold"
-                                    >
-                                        {title}
-                                    </h2>
-                                    {group.toggleable && (
-                                        <label
-                                            className={cn(
-                                                "flex cursor-pointer items-center gap-2 rounded-full border px-3 py-1.5 text-xs font-medium transition-colors motion-reduce:transition-none",
-                                                enabledGroups[group.id]
-                                                    ? "border-primary/30 bg-primary/5 text-primary"
-                                                    : "border-border bg-muted/50 text-muted-foreground hover:border-foreground/30 hover:text-foreground",
-                                            )}
-                                        >
-                                            {enabledGroups[group.id]
-                                                ? dict.admin.enabled
-                                                : dict.admin.disabled}
-                                            <Switch
-                                                checked={
-                                                    !!enabledGroups[group.id]
-                                                }
-                                                disabled={!writable || saving}
-                                                aria-label={formatMessage(
-                                                    dict.admin.enableGroup,
-                                                    { group: title },
-                                                )}
-                                                onCheckedChange={(checked) =>
-                                                    handleGroupToggle(
-                                                        group.id,
-                                                        checked,
-                                                    )
-                                                }
-                                            />
-                                        </label>
-                                    )}
-                                </div>
-                                <p className="mb-3 mt-1 text-sm text-muted-foreground text-pretty">
-                                    {gt?.description ?? group.description}
-                                </p>
-                                <div
-                                    className={cn(
-                                        "rounded-lg border bg-card px-4",
-                                        groupOff &&
-                                            "pointer-events-none opacity-50",
-                                    )}
-                                >
-                                    {defs.map((def) => (
-                                        <SettingField
-                                            key={def.key}
-                                            def={def}
-                                            state={settings[def.key]}
-                                            pendingValue={pending[def.key]}
-                                            error={errors[def.key]}
-                                            disabled={fieldsDisabled}
-                                            onChange={(v) =>
-                                                handleChange(def.key, v)
-                                            }
-                                        />
-                                    ))}
-                                </div>
-                            </section>
-                        )
-                    })}
-                </main>
-            </div>
-
-            {/* Always-mounted live region so save results are announced */}
-            <p aria-live="polite" className="sr-only">
-                {saveMessage?.text ?? ""}
-            </p>
-
-            {(dirtyCount > 0 || saveMessage) && (
-                <div className="fixed inset-x-0 bottom-0 z-30 border-t bg-background/95 backdrop-blur">
-                    <div className="mx-auto flex max-w-6xl items-center justify-between gap-4 px-4 py-3">
-                        <p
-                            className={cn(
-                                "flex min-w-0 items-center gap-1.5 truncate text-sm",
-                                saveMessage?.ok
-                                    ? "text-green-600 dark:text-green-400"
-                                    : saveMessage
-                                      ? "text-destructive"
-                                      : "text-muted-foreground",
-                            )}
-                        >
-                            {saveMessage?.ok && (
-                                <Check
-                                    className="h-4 w-4 shrink-0"
-                                    aria-hidden="true"
-                                />
-                            )}
-                            {saveMessage && !saveMessage.ok
-                                ? saveMessage.text
-                                : dirtyCount > 0
-                                  ? dict.admin.unsavedChanges
-                                  : saveMessage?.text}
-                        </p>
-                        {dirtyCount > 0 && (
-                            <div className="flex shrink-0 gap-2">
-                                <Button
-                                    type="button"
-                                    variant="outline"
-                                    disabled={saving}
-                                    onClick={() => {
-                                        setPending({})
-                                        setErrors({})
-                                        setProviders(JSON.parse(savedProviders))
-                                    }}
-                                >
-                                    {dict.admin.discard}
-                                </Button>
-                                <Button
-                                    type="button"
-                                    disabled={saving || !writable}
-                                    onClick={() => void handleSave()}
-                                >
-                                    {saving ? (
-                                        <>
-                                            <Loader2
-                                                className="mr-2 h-4 w-4 animate-spin motion-reduce:animate-none"
-                                                aria-hidden="true"
-                                            />
-                                            {dict.admin.saving}
-                                        </>
-                                    ) : (
-                                        dict.admin.saveChanges
-                                    )}
-                                </Button>
-                            </div>
-                        )}
-                    </div>
-                </div>
-            )}
-        </div>
-    )
-}
@@ -1,312 +0,0 @@
-import { Eye, EyeOff, X } from "lucide-react"
-import { useState } from "react"
-import { Button } from "@/components/ui/button"
-import { Input } from "@/components/ui/input"
-import { Label } from "@/components/ui/label"
-import {
-    Select,
-    SelectContent,
-    SelectItem,
-    SelectTrigger,
-    SelectValue,
-} from "@/components/ui/select"
-import { Switch } from "@/components/ui/switch"
-import { useDictionary } from "@/hooks/use-dictionary"
-import type { SettingDef } from "@/lib/admin/settings-registry"
-import { formatMessage } from "@/lib/i18n/utils"
-import { cn } from "@/lib/utils"
-import {
-    isSecretValue,
-    type SecretValue,
-    type SettingState,
-    savedTextOf,
-} from "./admin-shared"
-
-// ── Small shared UI bits ─────────────────────────────────────────────
-
-export function SourceChip({ source }: { source: "file" | "env" | "default" }) {
-    const dict = useDictionary()
-    if (source === "default") return null
-    return (
-        <span
-            className={cn(
-                "rounded px-1.5 py-0.5 text-[10px] font-medium uppercase tracking-wide",
-                source === "file"
-                    ? "bg-primary/10 text-primary"
-                    : "bg-muted text-muted-foreground",
-            )}
-            title={
-                source === "file"
-                    ? dict.admin.sourceSavedTitle
-                    : dict.admin.sourceEnvTitle
-            }
-        >
-            {source === "file" ? dict.admin.sourceSaved : dict.admin.sourceEnv}
-        </span>
-    )
-}
-
-export function RestartBadge() {
-    const dict = useDictionary()
-    return (
-        <span className="rounded bg-amber-500/10 px-1.5 py-0.5 text-[10px] font-medium uppercase tracking-wide text-amber-600 dark:text-amber-400">
-            {dict.admin.restartRequired}
-        </span>
-    )
-}
-
-// Secret input: shows masked hint as placeholder, typing replaces.
-// With keepOnEmpty, clearing the field reverts to the stored value
-// ("keep") instead of deleting it — explicit deletion is via the X button.
-export function SecretInput({
-    id,
-    value,
-    disabled,
-    keepOnEmpty,
-    onChange,
-}: {
-    id: string
-    value: string | SecretValue | undefined
-    disabled?: boolean
-    keepOnEmpty?: boolean
-    onChange: (value: string | SecretValue) => void
-}) {
-    const dict = useDictionary()
-    const [show, setShow] = useState(false)
-    // The stored marker as it was at mount, to revert to on empty
-    const [original] = useState(value)
-    const hadStored = isSecretValue(original)
-    const text = typeof value === "string" ? value : ""
-    const placeholder = isSecretValue(value)
-        ? formatMessage(dict.admin.savedReplace, { hint: value.hint })
-        : dict.admin.notSet
-    const handleText = (t: string) => {
-        if (t === "" && keepOnEmpty && hadStored && original) {
-            onChange(original)
-        } else {
-            onChange(t)
-        }
-    }
-    return (
-        <div className="flex items-center gap-1">
-            <Input
-                id={id}
-                type={show ? "text" : "password"}
-                value={text}
-                disabled={disabled}
-                spellCheck={false}
-                autoComplete="off"
-                placeholder={placeholder}
-                className="h-9 font-mono text-xs"
-                onChange={(e) => handleText(e.target.value)}
-            />
-            <Button
-                type="button"
-                variant="ghost"
-                size="icon"
-                className="shrink-0"
-                aria-label={show ? dict.admin.hideValue : dict.admin.showValue}
-                onClick={() => setShow((s) => !s)}
-            >
-                {show ? (
-                    <EyeOff className="h-4 w-4" aria-hidden="true" />
-                ) : (
-                    <Eye className="h-4 w-4" aria-hidden="true" />
-                )}
-            </Button>
-            {keepOnEmpty && (hadStored || text) && !disabled && (
-                <Button
-                    type="button"
-                    variant="ghost"
-                    size="icon"
-                    className="shrink-0"
-                    aria-label={dict.admin.removeValue}
-                    title={dict.admin.removeValueTitle}
-                    onClick={() => onChange("")}
-                >
-                    <X className="h-4 w-4" aria-hidden="true" />
-                </Button>
-            )}
-        </div>
-    )
-}
-
-// ── General settings field (registry-driven) ─────────────────────────
-
-export function SettingField({
-    def,
-    state,
-    pendingValue,
-    error,
-    disabled,
-    onChange,
-}: {
-    def: SettingDef
-    state: SettingState | undefined
-    pendingValue: string | null | undefined
-    error?: string
-    disabled: boolean
-    onChange: (value: string | null) => void
-}) {
-    const dict = useDictionary()
-    const isDirty = pendingValue !== undefined
-    const source = state?.source ?? "default"
-    const currentValue = isDirty ? (pendingValue ?? "") : savedTextOf(state)
-    const secretState = state && isSecretValue(state.value) ? state.value : null
-
-    // Localized label/description keyed by env var name, falling back to the
-    // registry's English (the registry stays canonical for the server).
-    const t = (
-        dict.admin.settings as Record<
-            string,
-            { label?: string; description?: string } | undefined
-        >
-    )[def.key]
-    const label = t?.label ?? def.label
-    const description = t?.description ?? def.description
-
-    const inputId = `setting-${def.key}`
-    const errorId = `${inputId}-error`
-
-    let control: React.ReactNode
-    switch (def.type) {
-        case "boolean": {
-            // When unset, reflect the built-in runtime default so the toggle
-            // matches actual behavior (e.g. ALLOW_PRIVATE_URLS defaults on).
-            const effective =
-                currentValue !== "" ? currentValue : (def.default ?? "false")
-            // A saved boolean can be cleared back to its env/default value.
-            const canClear =
-                (isDirty && pendingValue !== null) || source === "file"
-            control = (
-                <div className="flex items-center gap-3">
-                    <Switch
-                        id={inputId}
-                        checked={effective === "true"}
-                        disabled={disabled}
-                        onCheckedChange={(checked) =>
-                            onChange(checked ? "true" : "false")
-                        }
-                    />
-                    {canClear && !disabled && (
-                        <Button
-                            type="button"
-                            variant="ghost"
-                            size="sm"
-                            className="h-7 px-2 text-xs text-muted-foreground"
-                            onClick={() => onChange(null)}
-                        >
-                            {dict.admin.resetToDefault}
-                        </Button>
-                    )}
-                </div>
-            )
-            break
-        }
-        case "enum":
-            control = (
-                <Select
-                    value={currentValue || undefined}
-                    disabled={disabled}
-                    onValueChange={onChange}
-                >
-                    <SelectTrigger id={inputId} className="w-full max-w-xs">
-                        <SelectValue placeholder={dict.admin.notSet} />
-                    </SelectTrigger>
-                    <SelectContent>
-                        {def.options?.map((opt) => (
-                            <SelectItem key={opt} value={opt}>
-                                {opt}
-                            </SelectItem>
-                        ))}
-                    </SelectContent>
-                </Select>
-            )
-            break
-        case "secret":
-            control = (
-                <div className="w-full max-w-md">
-                    <SecretInput
-                        id={inputId}
-                        value={
-                            isDirty
-                                ? (pendingValue ?? "")
-                                : (secretState ?? currentValue)
-                        }
-                        disabled={disabled}
-                        onChange={(v) =>
-                            onChange(typeof v === "string" ? v : "")
-                        }
-                    />
-                </div>
-            )
-            break
-        case "number":
-            control = (
-                <Input
-                    id={inputId}
-                    type="number"
-                    inputMode="numeric"
-                    min={def.min}
-                    max={def.max}
-                    value={currentValue}
-                    disabled={disabled}
-                    placeholder={def.placeholder ?? dict.admin.notSet}
-                    className="w-full max-w-xs tabular-nums"
-                    aria-invalid={!!error}
-                    aria-describedby={error ? errorId : undefined}
-                    onChange={(e) => onChange(e.target.value)}
-                />
-            )
-            break
-        default:
-            control = (
-                <Input
-                    id={inputId}
-                    type="text"
-                    value={currentValue}
-                    disabled={disabled}
-                    spellCheck={false}
-                    autoComplete="off"
-                    placeholder={def.placeholder ?? dict.admin.notSet}
-                    className="w-full max-w-md"
-                    aria-invalid={!!error}
-                    aria-describedby={error ? errorId : undefined}
-                    onChange={(e) => onChange(e.target.value)}
-                />
-            )
-    }
-
-    return (
-        <div className="border-b border-border/60 py-4 last:border-b-0">
-            <div className="mb-1.5 flex flex-wrap items-center gap-2">
-                <Label htmlFor={inputId} className="text-sm font-medium">
-                    {label}
-                </Label>
-                <SourceChip source={source} />
-                {def.restartRequired && <RestartBadge />}
-                {isDirty && (
-                    <span className="rounded bg-blue-500/10 px-1.5 py-0.5 text-[10px] font-medium uppercase tracking-wide text-blue-600 dark:text-blue-400">
-                        {dict.admin.modified}
-                    </span>
-                )}
-            </div>
-            {description && (
-                <p className="mb-2 max-w-prose text-xs text-muted-foreground">
-                    {description}
-                </p>
-            )}
-            {control}
-            <p
-                id={errorId}
-                className={cn(
-                    "text-xs text-destructive",
-                    error ? "mt-1.5" : "sr-only",
-                )}
-                aria-live="polite"
-            >
-                {error ?? ""}
-            </p>
-        </div>
-    )
-}
@@ -41,24 +41,19 @@ export async function generateMetadata({
    params: Promise<{ lang: string }>
 }): Promise<Metadata> {
    const { lang: rawLang } = await params
-    const lang = (
-        rawLang in { en: 1, zh: 1, ja: 1, "zh-Hant": 1 } ? rawLang : "en"
-    ) as Locale
+    const lang = (rawLang in { en: 1, zh: 1, ja: 1 } ? rawLang : "en") as Locale

    // Default to English metadata
    const titles: Record<Locale, string> = {
        en: "Next AI Draw.io - AI-Powered Diagram Generator",
        zh: "Next AI Draw.io - AI powered diagram generator",
        ja: "Next AI Draw.io - AI-powered diagram generator",
-        "zh-Hant": "Next AI Draw.io - AI 驅動的圖表產生器",
    }

    const descriptions: Record<Locale, string> = {
        en: "Create AWS architecture diagrams, flowcharts, and technical diagrams using AI. Free online tool integrating draw.io with AI assistance for professional diagram creation.",
        zh: "Use AI to create AWS architecture diagrams, flowcharts, and technical diagrams. Free online tool integrated with draw.io and AI assistance for professional diagram creation.",
        ja: "Create AWS architecture diagrams, flowcharts, and technical diagrams using AI. Create professional diagrams with a free online tool that integrates draw.io with an AI assistant.",
-        "zh-Hant":
-            "使用 AI 建立 AWS 架構圖、流程圖和技術圖表。免費線上工具整合 draw.io 與 AI 輔助，輕鬆建立專業圖表。",
    }

    return {
@@ -85,14 +80,7 @@ export async function generateMetadata({
            type: "website",
            url: "https://next-ai-drawio.jiang.jp",
            siteName: "Next AI Draw.io",
-            locale:
-                lang === "zh"
-                    ? "zh_CN"
-                    : lang === "zh-Hant"
-                      ? "zh_HK"
-                      : lang === "ja"
-                        ? "ja_JP"
-                        : "en_US",
+            locale: lang === "zh" ? "zh_CN" : lang === "ja" ? "ja_JP" : "en_US",
            images: [
                {
                    url: "/architecture.png",
@@ -127,7 +115,6 @@ export async function generateMetadata({
                en: "/en",
                zh: "/zh",
                ja: "/ja",
-                "zh-Hant": "/zh-Hant",
            },
        },
    }
@@ -4,37 +4,32 @@ import { Suspense, useCallback, useEffect, useRef, useState } from "react"
 import { DrawIoEmbed } from "react-drawio"
 import type { ImperativePanelHandle } from "react-resizable-panels"
 import ChatPanel from "@/components/chat-panel"
+import { STORAGE_CLOSE_PROTECTION_KEY } from "@/components/settings-dialog"
 import {
    ResizableHandle,
    ResizablePanel,
    ResizablePanelGroup,
 } from "@/components/ui/resizable"
 import { useDiagram } from "@/contexts/diagram-context"
-import { type DrawioTheme, isDrawioTheme } from "@/lib/drawio-themes"
 import { i18n, type Locale } from "@/lib/i18n/config"

+const drawioBaseUrl =
+    process.env.NEXT_PUBLIC_DRAWIO_BASE_URL || "https://embed.diagrams.net"
+
 export default function Home() {
-    const {
-        drawioRef,
-        handleDiagramExport,
-        handleDiagramAutoSave,
-        onDrawioLoad,
-        resetDrawioReady,
-    } = useDiagram()
+    const { drawioRef, handleDiagramExport, onDrawioLoad, resetDrawioReady } =
+        useDiagram()
    const router = useRouter()
    const pathname = usePathname()
    // Extract current language from pathname (e.g., "/zh/about" → "zh")
    const currentLang = (pathname.split("/")[1] || i18n.defaultLocale) as Locale
    const [isMobile, setIsMobile] = useState(false)
    const [isChatVisible, setIsChatVisible] = useState(true)
-    const [drawioUi, setDrawioUi] = useState<DrawioTheme>("kennedy")
+    const [drawioUi, setDrawioUi] = useState<"min" | "sketch">("min")
    const [darkMode, setDarkMode] = useState(false)
    const [isLoaded, setIsLoaded] = useState(false)
    const [isDrawioReady, setIsDrawioReady] = useState(false)
-    const [isElectron, setIsElectron] = useState(false)
-    const [drawioBaseUrl, setDrawioBaseUrl] = useState(
-        process.env.NEXT_PUBLIC_DRAWIO_BASE_URL || "https://embed.diagrams.net",
-    )
+    const [closeProtection, setCloseProtection] = useState(false)

    const chatPanelRef = useRef<ImperativePanelHandle>(null)
    const isMobileRef = useRef(false)
@@ -54,7 +49,7 @@ export default function Home() {
        }

        const savedUi = localStorage.getItem("drawio-theme")
-        if (isDrawioTheme(savedUi)) {
+        if (savedUi === "min" || savedUi === "sketch") {
            setDrawioUi(savedUi)
        }

@@ -71,15 +66,11 @@ export default function Home() {
            document.documentElement.classList.toggle("dark", prefersDark)
        }

-        // Detect Electron and use bundled draw.io files for offline use
-        // Note: react-drawio uses `new URL(baseUrl)` so we need absolute URL
-        // Include /index.html because Next.js doesn't auto-serve index.html for directories
-        const electronDetected =
-            !process.env.NEXT_PUBLIC_DRAWIO_BASE_URL &&
-            !!(window as unknown as { electronAPI?: unknown }).electronAPI
-        if (electronDetected) {
-            setIsElectron(true)
-            setDrawioBaseUrl(`${window.location.origin}/drawio/index.html`)
+        const savedCloseProtection = localStorage.getItem(
+            STORAGE_CLOSE_PROTECTION_KEY,
+        )
+        if (savedCloseProtection === "true") {
+            setCloseProtection(true)
        }

        setIsLoaded(true)
@@ -99,9 +90,10 @@ export default function Home() {
        resetDrawioReady()
    }

-    const handleDrawioUiChange = (theme: DrawioTheme) => {
-        localStorage.setItem("drawio-theme", theme)
-        setDrawioUi(theme)
+    const handleDrawioUiChange = () => {
+        const newUi = drawioUi === "min" ? "sketch" : "min"
+        localStorage.setItem("drawio-theme", newUi)
+        setDrawioUi(newUi)
        setIsDrawioReady(false)
        resetDrawioReady()
    }
@@ -154,6 +146,20 @@ export default function Home() {
        return () => window.removeEventListener("keydown", handleKeyDown)
    }, [])

+    // Show confirmation dialog when user tries to leave the page
+    useEffect(() => {
+        if (!closeProtection) return
+
+        const handleBeforeUnload = (event: BeforeUnloadEvent) => {
+            event.preventDefault()
+            return ""
+        }
+
+        window.addEventListener("beforeunload", handleBeforeUnload)
+        return () =>
+            window.removeEventListener("beforeunload", handleBeforeUnload)
+    }, [closeProtection])
+
    return (
        <div className="h-screen bg-background relative overflow-hidden">
            <ResizablePanelGroup
@@ -177,10 +183,8 @@ export default function Home() {
                                    className={`h-full w-full ${isDrawioReady ? "" : "invisible absolute inset-0"}`}
                                >
                                    <DrawIoEmbed
-                                        key={`${drawioUi}-${darkMode}-${currentLang}-${isElectron}`}
+                                        key={`${drawioUi}-${darkMode}-${currentLang}`}
                                        ref={drawioRef}
-                                        autosave
-                                        onAutoSave={handleDiagramAutoSave}
                                        onExport={handleDiagramExport}
                                        onLoad={handleDrawioLoad}
                                        baseUrl={drawioBaseUrl}
@@ -191,13 +195,8 @@ export default function Home() {
                                            saveAndExit: false,
                                            noSaveBtn: true,
                                            noExitBtn: true,
-                                            dark:
-                                                darkMode || drawioUi === "dark",
+                                            dark: darkMode,
                                            lang: currentLang,
-                                            // Enable offline mode in Electron to disable external service calls
-                                            ...(isElectron && {
-                                                offline: true,
-                                            }),
                                        }}
                                    />
                                </div>
@@ -240,10 +239,11 @@ export default function Home() {
                                isVisible={isChatVisible}
                                onToggleVisibility={toggleChatPanel}
                                drawioUi={drawioUi}
-                                onDrawioUiChange={handleDrawioUiChange}
+                                onToggleDrawioUi={handleDrawioUiChange}
                                darkMode={darkMode}
                                onToggleDarkMode={handleDarkModeChange}
                                isMobile={isMobile}
+                                onCloseProtectionChange={setCloseProtection}
                            />
                        </Suspense>
                    </div>
@@ -1,89 +0,0 @@
-import { checkAdminAuth } from "@/lib/admin/auth"
-import {
-    AdminProvidersSchema,
-    deriveEnvUpdates,
-    loadAdminProviders,
-    maskAdminProviders,
-    mergeSecrets,
-    validateAdminProviders,
-} from "@/lib/admin/providers"
-import { isSettingsWritable, saveSettings } from "@/lib/admin/settings"
-import { loadEnvServerModelsConfig } from "@/lib/server-model-config"
-
-export const runtime = "nodejs"
-export const dynamic = "force-dynamic"
-
-async function payload() {
-    // Env-based providers (AI_MODELS_CONFIG / ai-models.json) are shown
-    // read-only in the panel; their credentials live in the environment
-    const envConfig = await loadEnvServerModelsConfig()
-    const adminProviders = loadAdminProviders()
-    // A panel default overrides any env default (matches the merge in
-    // loadRawServerModelsConfig), so env stars must reflect that
-    const adminHasDefault = adminProviders.some(
-        (p) => p.isDefault && p.models.length > 0,
-    )
-    return {
-        writable: isSettingsWritable(),
-        providers: maskAdminProviders(adminProviders),
-        envProviders:
-            envConfig?.providers.map((p) => ({
-                name: p.name,
-                provider: p.provider,
-                models: p.models,
-                isDefault: !!p.default && !adminHasDefault,
-            })) ?? [],
-    }
-}
-
-export async function GET(req: Request) {
-    const authError = checkAdminAuth(req)
-    if (authError) return authError
-    return Response.json(await payload())
-}
-
-export async function PUT(req: Request) {
-    const authError = checkAdminAuth(req)
-    if (authError) return authError
-
-    if (!isSettingsWritable()) {
-        return Response.json(
-            {
-                error: "Settings file is not writable on this deployment. Configure via environment variables instead.",
-            },
-            { status: 503 },
-        )
-    }
-
-    let body: unknown
-    try {
-        body = await req.json()
-    } catch {
-        return Response.json({ error: "Invalid JSON body" }, { status: 400 })
-    }
-
-    const parsed = AdminProvidersSchema.safeParse(
-        (body as { providers?: unknown })?.providers,
-    )
-    if (!parsed.success) {
-        return Response.json(
-            {
-                error: `Invalid providers: ${parsed.error.issues[0]?.message ?? "schema mismatch"}`,
-            },
-            { status: 400 },
-        )
-    }
-
-    const stored = loadAdminProviders()
-    const merged = mergeSecrets(parsed.data, stored)
-
-    const envConfig = await loadEnvServerModelsConfig()
-    const validationError = validateAdminProviders(merged, envConfig)
-    if (validationError) {
-        return Response.json({ error: validationError }, { status: 400 })
-    }
-
-    saveSettings(deriveEnvUpdates(merged, stored))
-
-    return Response.json(await payload())
-}
@@ -1,126 +0,0 @@
-import { checkAdminAuth, maskSecret } from "@/lib/admin/auth"
-import {
-    getEnvFallback,
-    getValueSource,
-    isSettingsWritable,
-    loadSettings,
-    saveSettings,
-} from "@/lib/admin/settings"
-import {
-    SETTINGS_BY_KEY,
-    SETTINGS_REGISTRY,
-    type SettingDef,
-} from "@/lib/admin/settings-registry"
-
-export const runtime = "nodejs"
-export const dynamic = "force-dynamic"
-
-function serializeSettings() {
-    const fileValues = loadSettings()
-    return SETTINGS_REGISTRY.map((def) => {
-        const source = getValueSource(def.key)
-        const raw =
-            source === "file"
-                ? fileValues[def.key]
-                : (getEnvFallback(def.key) ?? null)
-        const value = def.type === "secret" && raw ? maskSecret(raw) : raw
-        return { key: def.key, source, value }
-    })
-}
-
-export async function GET(req: Request) {
-    const authError = checkAdminAuth(req)
-    if (authError) return authError
-
-    return Response.json({
-        writable: isSettingsWritable(),
-        settings: serializeSettings(),
-    })
-}
-
-function validateValue(def: SettingDef, value: string): string | null {
-    switch (def.type) {
-        case "number": {
-            const num = Number(value)
-            if (!Number.isFinite(num)) return "Must be a number"
-            if (def.min !== undefined && num < def.min)
-                return `Must be at least ${def.min}`
-            if (def.max !== undefined && num > def.max)
-                return `Must be at most ${def.max}`
-            return null
-        }
-        case "boolean":
-            return value === "true" || value === "false"
-                ? null
-                : 'Must be "true" or "false"'
-        case "enum":
-            return def.options?.includes(value)
-                ? null
-                : `Must be one of: ${def.options?.join(", ")}`
-        default:
-            return null
-    }
-}
-
-export async function PUT(req: Request) {
-    const authError = checkAdminAuth(req)
-    if (authError) return authError
-
-    if (!isSettingsWritable()) {
-        return Response.json(
-            {
-                error: "Settings file is not writable on this deployment. Configure via environment variables instead.",
-            },
-            { status: 503 },
-        )
-    }
-
-    let body: { values?: Record<string, unknown> }
-    try {
-        body = await req.json()
-    } catch {
-        return Response.json({ error: "Invalid JSON body" }, { status: 400 })
-    }
-    if (!body.values || typeof body.values !== "object") {
-        return Response.json(
-            { error: "Body must contain a values object" },
-            { status: 400 },
-        )
-    }
-
-    const updates: Record<string, string | null> = {}
-    const errors: Record<string, string> = {}
-
-    for (const [key, value] of Object.entries(body.values)) {
-        const def = SETTINGS_BY_KEY.get(key)
-        if (!def) {
-            errors[key] = "Unknown setting"
-            continue
-        }
-        if (value === null || value === "") {
-            updates[key] = null
-            continue
-        }
-        if (typeof value !== "string") {
-            errors[key] = "Value must be a string"
-            continue
-        }
-        const error = validateValue(def, value)
-        if (error) {
-            errors[key] = error
-            continue
-        }
-        updates[key] = value
-    }
-
-    if (Object.keys(errors).length > 0) {
-        return Response.json({ errors }, { status: 400 })
-    }
-
-    saveSettings(updates)
-
-    return Response.json({
-        writable: true,
-        settings: serializeSettings(),
-    })
-}
@@ -1,66 +0,0 @@
-import { POST as validateModel } from "@/app/api/validate-model/route"
-import { checkAdminAuth } from "@/lib/admin/auth"
-import {
-    AdminProviderSchema,
-    loadAdminProviders,
-    mergeSecrets,
-} from "@/lib/admin/providers"
-
-export const runtime = "nodejs"
-export const dynamic = "force-dynamic"
-
-// Test a model with the client's CURRENT provider state (which may be
-// unsaved). Secret fields arrive either as plaintext (newly typed) or as
-// masked {isSet} markers, which are resolved against settings.json — so
-// testing works both before and after saving.
-export async function POST(req: Request) {
-    const authError = checkAdminAuth(req)
-    if (authError) return authError
-
-    let body: { provider?: unknown; modelId?: string }
-    try {
-        body = await req.json()
-    } catch {
-        return Response.json({ error: "Invalid JSON body" }, { status: 400 })
-    }
-
-    const parsed = AdminProviderSchema.safeParse(body.provider)
-    if (!parsed.success || !body.modelId) {
-        return Response.json(
-            { valid: false, error: "Invalid provider or model" },
-            { status: 400 },
-        )
-    }
-
-    // SECURITY: a stored secret is only resolved from an {isSet} marker if
-    // the endpoint it would be sent to (provider + baseUrl) still matches
-    // the stored entry. Otherwise a tampered baseUrl could exfiltrate the
-    // stored key to an arbitrary host. Mismatches must re-supply plaintext.
-    const stored = loadAdminProviders().find((p) => p.id === parsed.data.id)
-    const sameEndpoint =
-        stored &&
-        stored.provider === parsed.data.provider &&
-        (stored.baseUrl ?? "") === (parsed.data.baseUrl ?? "") &&
-        (stored.awsRegion ?? "") === (parsed.data.awsRegion ?? "")
-    const [resolved] = mergeSecrets(
-        [parsed.data],
-        sameEndpoint && stored ? [stored] : [],
-    )
-
-    return validateModel(
-        new Request(new URL("/api/validate-model", req.url), {
-            method: "POST",
-            headers: { "Content-Type": "application/json" },
-            body: JSON.stringify({
-                provider: resolved.provider,
-                apiKey: resolved.apiKey,
-                baseUrl: resolved.baseUrl,
-                modelId: body.modelId,
-                awsAccessKeyId: resolved.awsAccessKeyId,
-                awsSecretAccessKey: resolved.awsSecretAccessKey,
-                awsRegion: resolved.awsRegion,
-                vertexApiKey: resolved.vertexApiKey,
-            }),
-        }),
-    )
-}
@@ -1,61 +0,0 @@
-import { NextResponse } from "next/server"
-import {
-    AIHUBMIX_MODELS_ENDPOINT,
-    extractAihubmixModelIds,
-} from "@/lib/aihubmix-models"
-import { SUGGESTED_MODELS } from "@/lib/types/model-config"
-
-const SUCCESS_CACHE_CONTROL =
-    "public, max-age=300, s-maxage=3600, stale-while-revalidate=86400"
-
-function fallbackResponse() {
-    return NextResponse.json(
-        {
-            models: SUGGESTED_MODELS.aihubmix || [],
-            source: "fallback",
-        },
-        {
-            headers: {
-                "Cache-Control": "no-store",
-            },
-        },
-    )
-}
-
-export async function GET() {
-    try {
-        const response = await fetch(AIHUBMIX_MODELS_ENDPOINT, {
-            next: { revalidate: 3600 },
-        })
-
-        if (!response.ok) {
-            console.warn(
-                `[aihubmix-models] Failed to fetch models: ${response.status}`,
-            )
-            return fallbackResponse()
-        }
-
-        const payload = await response.json()
-        const models = extractAihubmixModelIds(payload)
-
-        if (models.length === 0) {
-            console.warn("[aihubmix-models] Model list response was empty")
-            return fallbackResponse()
-        }
-
-        return NextResponse.json(
-            {
-                models,
-                source: "aihubmix",
-            },
-            {
-                headers: {
-                    "Cache-Control": SUCCESS_CACHE_CONTROL,
-                },
-            },
-        )
-    } catch (error) {
-        console.warn("[aihubmix-models] Failed to load models:", error)
-        return fallbackResponse()
-    }
-}
@@ -8,11 +8,13 @@ import {
    stepCountIs,
    streamText,
 } from "ai"
+import fs from "fs/promises"
 import { jsonrepair } from "jsonrepair"
+import path from "path"
 import { z } from "zod"
 import {
    getAIModel,
-    SINGLE_SYSTEM_PROVIDERS,
+    supportsImageInput,
    supportsPromptCaching,
 } from "@/lib/ai-providers"
 import { findCachedResponse } from "@/lib/cached-responses"
@@ -21,7 +23,6 @@ import {
    replaceHistoricalToolInputs,
    validateFileParts,
 } from "@/lib/chat-helpers"
-import { OperationSchema, searchStencils } from "@/lib/diagram-engine"
 import {
    checkAndIncrementRequest,
    isQuotaEnabled,
@@ -33,17 +34,12 @@ import {
    setTraceOutput,
    wrapWithObserve,
 } from "@/lib/langfuse"
-import { findServerModelById } from "@/lib/server-model-config"
 import { getSystemPrompt } from "@/lib/system-prompts"
 import { getUserIdFromRequest } from "@/lib/user-id"

 export const maxDuration = 120

-// Helper function to create cached stream response.
-//
-// This replays a stored XML answer straight to the canvas, so it still speaks the
-// `display_diagram` wire format even though the model can no longer call that tool: the client
-// handler for it is what puts XML on the canvas. Nothing here goes through the model.
+// Helper function to create cached stream response
 function createCachedStreamResponse(xml: string): Response {
    const toolCallId = `cached-${Date.now()}`

@@ -92,12 +88,7 @@ async function handleChatRequest(req: Request): Promise<Response> {
        }
    }

-    const body = await req.json()
-    const { messages, xml, previousXml, sessionId } = body
-    const customSystemMessage =
-        typeof body.customSystemMessage === "string"
-            ? body.customSystemMessage.slice(0, 5000)
-            : ""
+    const { messages, xml, previousXml, sessionId } = await req.json()

    // Get user ID for Langfuse tracking and quota
    const userId = getUserIdFromRequest(req)
@@ -126,10 +117,7 @@ async function handleChatRequest(req: Request): Promise<Response> {
    // === SERVER-SIDE QUOTA CHECK START ===
    // Quota is opt-in: only enabled when DYNAMODB_QUOTA_TABLE env var is set
    const hasOwnApiKey = !!(
-        req.headers.get("x-ai-provider") &&
-        (req.headers.get("x-ai-api-key") ||
-            req.headers.get("x-aws-access-key-id") ||
-            req.headers.get("x-vertex-api-key"))
+        req.headers.get("x-ai-provider") && req.headers.get("x-ai-api-key")
    )

    // Skip quota check if: quota disabled, user has own API key, or is anonymous
@@ -180,7 +168,6 @@ async function handleChatRequest(req: Request): Promise<Response> {
    // Read client AI provider overrides from headers
    const provider = req.headers.get("x-ai-provider")
    let baseUrl = req.headers.get("x-ai-base-url")
-    const selectedModelId = req.headers.get("x-selected-model-id")

    // For EdgeOne provider, construct full URL from request origin
    // because createOpenAI needs absolute URL, not relative path
@@ -192,30 +179,8 @@ async function handleChatRequest(req: Request): Promise<Response> {
    // Get cookie header for EdgeOne authentication (eo_token, eo_time)
    const cookieHeader = req.headers.get("cookie")

-    // Check if this is a server model with custom env var names
-    let serverModelConfig: {
-        apiKeyEnv?: string | string[]
-        baseUrlEnv?: string
-        provider?: string
-    } = {}
-    if (selectedModelId?.startsWith("server:")) {
-        const serverModel = await findServerModelById(selectedModelId)
-        console.log(
-            `[Server Model Lookup] ID: ${selectedModelId}, Found: ${!!serverModel}, Provider: ${serverModel?.provider}`,
-        )
-        if (serverModel) {
-            serverModelConfig = {
-                apiKeyEnv: serverModel.apiKeyEnv,
-                baseUrlEnv: serverModel.baseUrlEnv,
-                // Use actual provider from config (client header may have incorrect value due to ID format change)
-                provider: serverModel.provider,
-            }
-        }
-    }
-
    const clientOverrides = {
-        // Server model provider takes precedence over client header
-        provider: serverModelConfig.provider || provider,
+        provider,
        baseUrl,
        apiKey: req.headers.get("x-ai-api-key"),
        modelId: req.headers.get("x-ai-model"),
@@ -224,10 +189,6 @@ async function handleChatRequest(req: Request): Promise<Response> {
        awsSecretAccessKey: req.headers.get("x-aws-secret-access-key"),
        awsRegion: req.headers.get("x-aws-region"),
        awsSessionToken: req.headers.get("x-aws-session-token"),
-        // Server model custom env var names
-        ...serverModelConfig,
-        // Vertex AI credentials (Express Mode)
-        vertexApiKey: req.headers.get("x-vertex-api-key"),
        // Pass cookies for EdgeOne Pages authentication
        ...(provider === "edgeone" &&
            cookieHeader && {
@@ -238,18 +199,9 @@ async function handleChatRequest(req: Request): Promise<Response> {
    // Read minimal style preference from header
    const minimalStyle = req.headers.get("x-minimal-style") === "true"

-    console.log(
-        `[Client Overrides] provider: ${clientOverrides.provider}, modelId: ${clientOverrides.modelId}`,
-    )
-
    // Get AI model with optional client overrides
-    const {
-        model,
-        providerOptions,
-        headers,
-        modelId,
-        provider: resolvedProvider,
-    } = getAIModel(clientOverrides)
+    const { model, providerOptions, headers, modelId } =
+        getAIModel(clientOverrides)

    // Check if model supports prompt caching
    const shouldCache = supportsPromptCaching(modelId)
@@ -259,19 +211,22 @@ async function handleChatRequest(req: Request): Promise<Response> {

    // Get the appropriate system prompt based on model (extended for Opus/Haiku 4.5)
    const systemMessage = getSystemPrompt(modelId, minimalStyle)
-    const finalSystemMessage = customSystemMessage
-        ? `${systemMessage}\n\n## Custom Instructions\n${customSystemMessage}`
-        : systemMessage

    // Extract file parts (images) from the last user message
    const fileParts =
        lastUserMessage?.parts?.filter((part: any) => part.type === "file") ||
        []

-    // Note: we used to pre-emptively reject images for models we guessed were
-    // text-only (by name matching). That heuristic misfired on newer models
-    // (see issue #874), so we now let the request through and surface the real
-    // provider error if the model genuinely can't accept images.
+    // Check if user is sending images to a model that doesn't support them
+    // AI SDK silently drops unsupported parts, so we need to catch this early
+    if (fileParts.length > 0 && !supportsImageInput(modelId)) {
+        return Response.json(
+            {
+                error: `The model "${modelId}" does not support image input. Please use a vision-capable model (e.g., GPT-4o, Claude, Gemini) or remove the image.`,
+            },
+            { status: 400 },
+        )
+    }

    // User input only - XML is now in a separate cached system message
    const formattedUserInput = `User input:
@@ -428,74 +383,37 @@ ${userInputText}
    }

    // System messages with multiple cache breakpoints for optimal caching:
-    // - Breakpoint 1: System instructions + custom instructions - changes when user updates custom system message
+    // - Breakpoint 1: Static instructions (~1500 tokens) - rarely changes
    // - Breakpoint 2: Current XML context - changes per diagram, but constant within a conversation turn
-    // Some providers (e.g. MiniMax) don't support multiple system messages
-    // Merge them into a single system message for compatibility
-    // Also merge for OpenAI-compatible providers with custom base URLs (e.g. vLLM, LMStudio)
-    // because open-source model chat templates (Qwen, Llama, etc.) typically reject multiple system messages
-    const isCustomOpenAIEndpoint =
-        resolvedProvider === "openai" &&
-        !!(
-            baseUrl ||
-            process.env.OPENAI_BASE_URL ||
-            (serverModelConfig.baseUrlEnv &&
-                process.env[serverModelConfig.baseUrlEnv])
-        )
-    const isSingleSystemProvider =
-        SINGLE_SYSTEM_PROVIDERS.has(resolvedProvider) || isCustomOpenAIEndpoint
-
-    const xmlContext = `${
-        previousXml
-            ? `Previous diagram XML (before user's last message):
-"""xml
-${previousXml}
-"""
-
-`
-            : ""
-    }Current diagram XML (AUTHORITATIVE - the source of truth):
-"""xml
-${xml || ""}
-"""
-
-IMPORTANT: The "Current diagram XML" is the SINGLE SOURCE OF TRUTH for what's on the canvas right now. The user can manually add, delete, or modify shapes directly in draw.io. Always count and describe elements based on the CURRENT XML, not on what you previously generated. If both previous and current XML are shown, compare them to understand what the user changed. When using edit_diagram, COPY search patterns exactly from the CURRENT XML - attribute order matters!`
-
-    const systemMessages = isSingleSystemProvider
-        ? [
-              {
-                  role: "system" as const,
-                  content: `${finalSystemMessage}\n\n${xmlContext}`,
-              },
-          ]
-        : [
-              // Cache breakpoint 1: Instructions (+ optional custom instructions)
-              {
-                  role: "system" as const,
-                  content: finalSystemMessage,
-                  ...(shouldCache && {
-                      providerOptions: {
-                          bedrock: { cachePoint: { type: "default" } },
-                      },
-                  }),
-              },
-              // Cache breakpoint 2: Previous and Current diagram XML context
-              {
-                  role: "system" as const,
-                  content: xmlContext,
-                  ...(shouldCache && {
-                      providerOptions: {
-                          bedrock: { cachePoint: { type: "default" } },
-                      },
-                  }),
-              },
-          ]
+    // This allows: if only user message changes, both system caches are reused
+    //              if XML changes, instruction cache is still reused
+    const systemMessages = [
+        // Cache breakpoint 1: Instructions (rarely change)
+        {
+            role: "system" as const,
+            content: systemMessage,
+            ...(shouldCache && {
+                providerOptions: {
+                    bedrock: { cachePoint: { type: "default" } },
+                },
+            }),
+        },
+        // Cache breakpoint 2: Previous and Current diagram XML context
+        {
+            role: "system" as const,
+            content: `${previousXml ? `Previous diagram XML (before user's last message):\n"""xml\n${previousXml}\n"""\n\n` : ""}Current diagram XML (AUTHORITATIVE - the source of truth):\n"""xml\n${xml || ""}\n"""\n\nIMPORTANT: The "Current diagram XML" is the SINGLE SOURCE OF TRUTH for what's on the canvas right now. The user can manually add, delete, or modify shapes directly in draw.io. Always count and describe elements based on the CURRENT XML, not on what you previously generated. If both previous and current XML are shown, compare them to understand what the user changed. When using edit_diagram, COPY search patterns exactly from the CURRENT XML - attribute order matters!`,
+            ...(shouldCache && {
+                providerOptions: {
+                    bedrock: { cachePoint: { type: "default" } },
+                },
+            }),
+        },
+    ]

    const allMessages = [...systemMessages, ...enhancedMessages]

    const result = streamText({
        model,
-        abortSignal: req.signal,
        ...(process.env.MAX_OUTPUT_TOKENS && {
            maxOutputTokens: parseInt(process.env.MAX_OUTPUT_TOKENS, 10),
        }),
@@ -523,13 +441,6 @@ IMPORTANT: The "Current diagram XML" is the SINGLE SOURCE OF TRUTH for what's on
                        inputToRepair = inputToRepair.replace(/:=/g, ": ")
                        // Fix `= "` instead of `: "`
                        inputToRepair = inputToRepair.replace(/=\s*"/g, ': "')
-                        // Fix inconsistent quote escaping in XML attributes within JSON strings
-                        // Pattern: attribute="value\" where opening quote is unescaped but closing is escaped
-                        // Example: y="-20\" should be y=\"-20\"
-                        inputToRepair = inputToRepair.replace(
-                            /(\w+)="([^"]*?)\\"/g,
-                            '$1=\\"$2\\"',
-                        )
                    }
                    // Use jsonrepair to fix truncated JSON
                    const repairedInput = jsonrepair(inputToRepair)
@@ -553,6 +464,15 @@ IMPORTANT: The "Current diagram XML" is the SINGLE SOURCE OF TRUTH for what's on
                            },
                        }
                    }
+                    if (toolCall.toolName === "display_diagram") {
+                        return {
+                            ...toolCall,
+                            input: {
+                                xml: "",
+                                _error: "JSON repair failed - empty diagram",
+                            },
+                        }
+                    }
                    return null
                }
            }
@@ -592,6 +512,44 @@ IMPORTANT: The "Current diagram XML" is the SINGLE SOURCE OF TRUTH for what's on
        },
        tools: {
            // Client-side tool that will be executed on the client
+            display_diagram: {
+                description: `Display a diagram on draw.io. Pass ONLY the mxCell elements - wrapper tags and root cells are added automatically.
+
+VALIDATION RULES (XML will be rejected if violated):
+1. Generate ONLY mxCell elements - NO wrapper tags (<mxfile>, <mxGraphModel>, <root>)
+2. Do NOT include root cells (id="0" or id="1") - they are added automatically
+3. All mxCell elements must be siblings - never nested
+4. Every mxCell needs a unique id (start from "2")
+5. Every mxCell needs a valid parent attribute (use "1" for top-level)
+6. Escape special chars in values: &lt; &gt; &amp; &quot;
+
+Example (generate ONLY this - no wrapper tags):
+<mxCell id="lane1" value="Frontend" style="swimlane;" vertex="1" parent="1">
+  <mxGeometry x="40" y="40" width="200" height="200" as="geometry"/>
+</mxCell>
+<mxCell id="step1" value="Step 1" style="rounded=1;" vertex="1" parent="lane1">
+  <mxGeometry x="20" y="60" width="160" height="40" as="geometry"/>
+</mxCell>
+<mxCell id="lane2" value="Backend" style="swimlane;" vertex="1" parent="1">
+  <mxGeometry x="280" y="40" width="200" height="200" as="geometry"/>
+</mxCell>
+<mxCell id="step2" value="Step 2" style="rounded=1;" vertex="1" parent="lane2">
+  <mxGeometry x="20" y="60" width="160" height="40" as="geometry"/>
+</mxCell>
+<mxCell id="edge1" style="edgeStyle=orthogonalEdgeStyle;endArrow=classic;" edge="1" parent="1" source="step1" target="step2">
+  <mxGeometry relative="1" as="geometry"/>
+</mxCell>
+
+Notes:
+- For AWS diagrams, use **AWS 2025 icons**.
+- For animated connectors, add "flowAnimation=1" to edge style.
+`,
+                inputSchema: z.object({
+                    xml: z
+                        .string()
+                        .describe("XML string to be displayed on draw.io"),
+                }),
+            },
            edit_diagram: {
                description: `Edit the current diagram by ID-based operations (update/add/delete cells).

@@ -634,169 +592,87 @@ Example - Delete container (children & edges auto-deleted):
                        .describe("Array of operations to apply"),
                }),
            },
-            restructure_diagram: {
-                description: `Build or edit a diagram by declaring STRUCTURE. The engine computes every coordinate.
+            append_diagram: {
+                description: `Continue generating diagram XML when previous display_diagram output was truncated due to length limits.

-PREFER THIS over edit_diagram whenever the diagram's meaning is in nesting or in a fixed frame: cloud architecture, swimlane/BPMN, sequence diagrams, mind maps, org charts — AND poster-style layouts: paper summaries, cheat sheets, infographics, comparison sheets. You declare what contains what; layout, sizing, alignment and arrow routing are computed. Containers always fit their contents and siblings never overlap, so the usual layout problems cannot occur.
+WHEN TO USE: Only call this tool after display_diagram was truncated (you'll see an error message about truncation).

-The layout model is FLEXBOX. row/col containers nest freely; a box with internal structure is an invisible col container (pad 10-14) holding smaller boxes. Three knobs: grow (columns split leftover WIDTH by weight — grow 3 / grow 2 gives a 3:2 page; for containers in a row, not for leaf boxes), align "stretch" (child fills its column's width; content keeps natural height and packs to the top — the engine leaves leftover vertical space at the bottom, never inflates boxes to fill it, so balance columns by moving content between them), pad (8-14 tight card, default 24 roomy section). Labels take inline HTML — <b>, <i>, <font color="#...">, <br> — so one box carries a bold keyword, a second paragraph, a coloured verdict line. Paragraphs set themselves flush-left automatically; short labels centre. Emoji in headings (💡 Core Idea) read instantly.
+CRITICAL INSTRUCTIONS:
+1. Do NOT include any wrapper tags - just continue the mxCell elements
+2. Continue from EXACTLY where your previous output stopped
+3. Complete the remaining mxCell elements
+4. If still truncated, call append_diagram again with the next fragment

-DECLARE THE PAGE SHAPE FIRST, with set_page. aspect is width:height — 1 square, 1.4 a landscape slide, 0.75 a portrait poster, 1.6 a wide architecture diagram. This is the one thing that has to come before everything else: it gives the top level a definite width, and until there is one there is no spare room to share out, so grow weights and column fractions have no effect at all. A row that then cannot fit wraps onto a second line rather than running off to the right.
-
-LAYOUT, TYPE AND SURFACE — Tailwind classes. Every add_container and add_box takes class, and it is the preferred way to say these things. Colour is the one thing a class never carries: that comes from role and group.
-  proportion    grow-3 / flex-3 / w-2/3 — a column's share of the row. Add min-w-0 to BOTH columns when you want the ratio exactly: without it a column will not shrink below the width of its own text, so a declared 3:1 lands wherever the text allows (this is how flexbox behaves in a browser too).
-  direction     flex-row, flex-col (or the dir field, which a class cannot override)
-  cross axis    items-stretch on the container (cards all span the same width — this is what makes a column line up), or self-start / self-center / self-end / self-stretch on one child
-  main axis     justify-start (default: packed, spare room at the far end) / justify-center / justify-end / justify-between / justify-around / justify-evenly. Reach for justify-between when a short column would otherwise leave a hole at the bottom.
-  spacing       gap-4 between children, p-6 inside. Tailwind's 4px scale, so gap-4 is 16px and p-6 is 24px. Use the scale; there is no gap-7.5.
-  width cap     max-w-md (448) or max-w-96, up to max-w-4xl. A capped box rewraps its text instead of stretching, which is what stops one long sentence flattening the page. A cap beats grow.
-  type          font-bold / font-normal, italic, underline, line-through, text-xs..text-4xl (12/14/16/18/20/24/30/36px), text-left|center|right, align-top|middle|bottom, whitespace-nowrap. An explicit alignment beats the engine's own "this looks like a paragraph" rule, so use text-center when you want a long label centred. line-through is for a superseded or cancelled step.
-  border        border or border-N for thickness, border-dashed / border-dotted / border-solid. A dashed frame is the conventional way to draw something planned, optional or purely logical. border-none removes the outline entirely, which is how you draw a plain colour field.
-  corners       rounded, rounded-sm, rounded-md, rounded-lg, rounded-xl, rounded-2xl, rounded-3xl, rounded-4xl (4/4/6/8/12/16/24/32px), rounded-full for a capsule, rounded-none for square. Real pixels, so the same class is the same corner on every box. Overrides the corner of a shape that has one, which is what you want on round and terminator.
-  elevation     shadow-sm / shadow-md / shadow-lg / shadow-xl, shadow-none. Use it to lift a card off a panel; one level on one group of cards, not on everything.
-NOT supported, and dropped with a note telling you which: EVERY colour class (bg-*, text-red-*, border-blue-*) and gradients — colour comes from role and group; the seven font weights between font-thin and font-black, because draw.io has one bold bit rather than a weight ladder; opacity-* (Tailwind's is any number, not a scale); truncate (draw.io cannot draw the ellipsis, so text would just be cut); PER-SIDE borders (border-l, border-t-4) — draw.io draws these with a shape called partialRectangle, which would take the place of the node's own shape, and what a node IS matters more than which of its edges show; PER-SIDE padding (pt-4, px-2) — the engine has one padding value, and draw.io's per-side keys pad the LABEL rather than making room for children; per-corner radius (rounded-tl-lg); text-shadow-*; tracking-* and uppercase/lowercase/capitalize and leading-* (draw.io has no letter-spacing, no text-transform and no per-node line height); outline-*, hover:*, responsive prefixes, and all transforms.
-
-PLAN THE COLUMNS BEFORE THE FIRST OPERATION. The engine places exactly what you declare; a column that runs out of content early leaves a hole at the bottom of the page and nothing later can fill it. So: list each section with a rough character count (heading ~20, paragraph ~its length, comparison card ~the sum of its parts, add_graph ~400); a column twice as wide runs about half as tall, so a column's SHARE OF THE TOTAL CONTENT must match its grow weight — grow 3 beside grow 1 holds about three times the characters, never fewer; add the columns up and check the ratio before emitting anything (1200 vs 1100 chars is grow 1 / grow 1, and wanting grow 3 / grow 1 for 900 vs 1100 means the plan is wrong — move sections across or equalise the weights); a full-width element (masthead, footnote, wide diagram) is its own row above or below the row of columns, never inside one, because a 900-wide diagram in one column forces that column wide and strands the others. State the numbers in your preamble ("left ~N chars / right ~M, so grow X / Y") — writing them down is what catches the mismatch.
-
-For a POSTER (paper summary, cheat sheet): set_page with aspect 0.75 (portrait) or 1.4 (landscape); one col container as the page with class "gap-4"; a banner box as the masthead with class "self-stretch" (do NOT also use set_title — the banner IS the title); a muted box for the byline; a row container class "gap-4" holding 2-4 col containers as columns, each class "grow-N min-w-0 items-stretch"; each section a heading-role box + content boxes. Give each section a distinct group name — sections sharing a group share a hue, so groups are how the poster gets its colour. Use roles on boxes: callout for the core idea, good/bad for verdict pairs, metric for the headline number, muted for fine print. A comparison card: add_container dir=col class="gap-2 p-3 grow-1 items-stretch" role=bad, then a bold title box, the body text, a role=bad answer bar, and a coloured "<font color=\\"#B85450\\"><b>✗ Often Wrong</b></font>" verdict with class "self-start".
-{"operations":[
-  {"op":"set_page","aspect":0.8},
-  {"op":"add_container","id":"page","label":"","dir":"col","class":"gap-4"},
-  {"op":"add_box","id":"mast","parent":"page","label":"Chain-of-Thought Prompting","role":"banner","class":"self-stretch"},
-  {"op":"add_container","id":"cols","parent":"page","label":"","dir":"row","class":"gap-4"},
-  {"op":"add_container","id":"left","parent":"cols","label":"","dir":"col","class":"grow-2 min-w-0 gap-3 items-stretch"},
-  {"op":"add_container","id":"right","parent":"cols","label":"","dir":"col","class":"grow-1 min-w-0 gap-3 items-stretch"},
-  {"op":"add_box","id":"h1","parent":"left","label":"What it is","role":"heading","group":"idea"},
-  {"op":"add_box","id":"p1","parent":"left","label":"Ask the model to show its steps...","group":"idea"}
-]}
-(Two thirds of the characters go in the grow-2 column, one third in the grow-1 column.)
-
-Never write coordinates, mxCell XML, or style strings. Look AWS icon names up with search_stencils first — an invented name is rejected with suggestions.
-
-Operations are applied in order, so you can add a container and fill it in the same call:
-{"operations":[
-  {"op":"add_container","id":"vpc","label":"VPC 10.0.0.0/16","dir":"col","gname":"group_vpc"},
-  {"op":"add_icon","id":"alb","parent":"vpc","name":"application_load_balancer","label":"ALB"},
-  {"op":"add_icon","id":"ec2","parent":"vpc","name":"ec2","label":"EC2"},
-  {"op":"link","source":"alb","target":"ec2","label":"route","step":1}
-]}
-
-Editing an existing diagram: the structure is re-read from the canvas each time, INCLUDING anything the user moved or recoloured by hand. To add one service, send one operation — do not re-send the diagram.
-
-CLOUD ARCHITECTURE (AWS/Azure/GCP/Kubernetes) — every zone is a container, and each one's dir is what makes the diagram readable: dir follows the traffic. Nesting is Region -> VPC -> Availability Zone -> Subnet, and managed/global services (CloudFront, Route 53, S3, DynamoDB, SQS, SNS, WAF, CloudWatch) sit OUTSIDE the VPC — a regional service inside a subnet states something false about the network. Use dir "row" wherever things are PEERS (availability zones side by side, replicas, a set of regional services) and dir "col" wherever traffic FLOWS THROUGH (the tiers inside one zone: public -> app -> data, top to bottom). Label every zone with its scope ("Availability Zone A", "Private Subnet (App)", "VPC 10.0.0.0/16") — an unlabelled frame makes the reader guess what the boundary means. Put the actor (Users / Internet) OUTSIDE the region as a plain box with shape "person" or "cloud" and link it inwards; it is not infrastructure. Two availability zones is the right default for "a sample architecture" — one reads as a single point of failure, three repeats the same information a third time. Number the request path on the links ("1. HTTPS", "2. forward", "3. route", "4. query") so the reader has an entry point, and make cross-cutting links (replication, telemetry) dashed and unnumbered. Keep each zone to 1-4 icons: one is fine when the boundary itself is the point (a subnet holding one NAT gateway), ten is a wall of icons — split it or use add_grid.
-{"operations":[
-  {"op":"add_box","id":"users","label":"Users / Internet","shape":"person"},
-  {"op":"add_container","id":"region","label":"Region (ap-southeast-1)","dir":"row","gname":"group_region"},
-  {"op":"add_container","id":"vpc","parent":"region","label":"VPC 10.0.0.0/16","dir":"col","gname":"group_vpc"},
-  {"op":"add_icon","id":"igw","parent":"vpc","name":"internet_gateway","label":"Internet Gateway"},
-  {"op":"add_icon","id":"alb","parent":"vpc","name":"application_load_balancer","label":"ALB"},
-  {"op":"add_container","id":"azs","parent":"vpc","dir":"row"},
-  {"op":"add_container","id":"az_a","parent":"azs","label":"Availability Zone A","dir":"col","gname":"group_availability_zone"},
-  {"op":"add_container","id":"pub_a","parent":"az_a","label":"Public Subnet","dir":"col","gname":"group_subnet"},
-  {"op":"add_icon","id":"nat_a","parent":"pub_a","name":"nat_gateway","label":"NAT Gateway"},
-  {"op":"add_container","id":"app_a","parent":"az_a","label":"Private Subnet (App)","dir":"col","gname":"group_subnet"},
-  {"op":"add_icon","id":"ec2_a","parent":"app_a","name":"ec2","label":"EC2 / ECS"},
-  {"op":"add_container","id":"db_a","parent":"az_a","label":"Private Subnet (Data)","dir":"col","gname":"group_subnet"},
-  {"op":"add_icon","id":"rds_a","parent":"db_a","name":"rds","label":"RDS (Primary)"},
-  {"op":"add_container","id":"reg_svc","parent":"region","label":"Regional / Edge services","dir":"col"},
-  {"op":"add_icon","id":"waf","parent":"reg_svc","name":"waf","label":"AWS WAF"},
-  {"op":"link","source":"users","target":"igw","label":"1. HTTPS"},
-  {"op":"link","source":"igw","target":"alb","label":"2. forward"},
-  {"op":"link","source":"alb","target":"ec2_a","label":"3. route"},
-  {"op":"link","source":"ec2_a","target":"rds_a","label":"4. query"},
-  {"op":"link","source":"rds_a","target":"rds_b","label":"Multi-AZ replication","dashed":true}
-]}
-(az_b mirrors az_a, with RDS labelled "(Standby)".)
-
-CONTAINERS — pick by what the diagram means:
-
-add_container: children stacked along one axis. dir "row" side by side, "col" one above the next. An empty label makes an invisible grouping wrapper (use it to group columns without drawing another frame). gname is an AWS group stencil (group_region, group_vpc, group_availability_zone, group_subnet, group_account) — omit it for a plain titled frame.
-
-add_grid: packs children into cols columns. Use it to pack 3-8 related icons into one labelled area rather than giving each its own frame.
-
-add_graph: an ARROW-ORDERED block. Give it nodes and edges, NO positions and NO nesting: the engine reads the arrows to work out how many rows the diagram has, which nodes share a row, and who goes left of whom — chosen to keep arrows from crossing each other or running through unrelated boxes. Loops and arrows that skip ahead are fine.
-  THIS IS THE ONLY WAY TO DRAW A FLOWCHART. Use it for flowcharts, decision trees, process and approval flows, CI/CD pipelines, state machines, git/branching workflows, dependency graphs, ER diagrams, site maps, data-flow diagrams, and any "illustrate how X works" where X is a sequence of steps or states. Never build one out of add_container/add_box by hand: declaring a flowchart as nesting puts every step in one column, so each branch has to jump over the step beside it.
-  Omit parent for a whole-page flowchart; set parent to put a flow inside one zone of a bigger diagram (a pipeline in an architecture diagram, a small flowchart in a poster column), where the block then joins the outer layout like any node. dir: "col" (default) flows down, "row" flows right.
-  Redrawing a whole-page flowchart: send clear first. One new arrow can change which row several nodes belong in, so a flowchart is rebuilt rather than patched.
-{"operations":[
-  {"op":"clear"},
-  {"op":"add_graph","id":"flow","nodes":[
-    {"id":"start","label":"Order received","shape":"terminator"},
-    {"id":"check","label":"Amount > $1000?","shape":"decision"},
-    {"id":"mgr","label":"Manager approval"},
-    {"id":"auto","label":"Auto-approve"},
-    {"id":"ship","label":"Ship order"}
-  ],"edges":[
-    {"source":"start","target":"check"},
-    {"source":"check","target":"mgr","label":"yes"},
-    {"source":"check","target":"auto","label":"no"},
-    {"source":"mgr","target":"ship"},
-    {"source":"auto","target":"ship"}
-  ]},
-  {"op":"set_title","title":"Order Approval"}
-]}
-  Grouping: when the nodes fall into natural zones (remote vs local, frontend vs backend, roles, phases), set the same group name on each zone's nodes and the engine colours each zone consistently. Set icon instead of shape to draw a node as a catalog icon.
-
-add_pool: a SWIMLANE diagram. lanes are the roles, top to bottom. Set orientation to "vertical" for vertical swimlanes, where the lanes become columns and the flow runs downwards. Each step is an add_box with lane (which role owns it) and col (which step of the process it is); columns advance left to right and an empty cell means that role does nothing at that point. Two steps with the same col happen at the same time. phases optionally labels groups of columns.
-{"operations":[
-  {"op":"add_pool","id":"p","label":"Expense claim","lanes":["Employee","Manager","Finance"],"phases":["Submit","Review","Pay"]},
-  {"op":"add_box","id":"fill","parent":"p","label":"Fill form","lane":0,"col":0,"shape":"terminator"},
-  {"op":"add_box","id":"rev","parent":"p","label":"Review","lane":1,"col":1},
-  {"op":"add_box","id":"ok","parent":"p","label":"Approved?","lane":1,"col":2,"shape":"decision"},
-  {"op":"add_box","id":"pay","parent":"p","label":"Pay out","lane":2,"col":3},
-  {"op":"link","source":"fill","target":"rev"},{"op":"link","source":"rev","target":"ok"},
-  {"op":"link","source":"ok","target":"pay","label":"yes"}
-]}
-
-add_sequence: a SEQUENCE diagram. One add_box per participant, left to right in the order they first act; the engine draws each one's lifeline. Every message is a link with a step number giving its order — number them 1, 2, 3… as they happen, and make a reply its own link back. A participant calling itself is a link from a node to itself.
-{"operations":[
-  {"op":"add_sequence","id":"s","label":"Login flow"},
-  {"op":"add_box","id":"u","parent":"s","label":"User"},
-  {"op":"add_box","id":"api","parent":"s","label":"API"},
-  {"op":"add_box","id":"db","parent":"s","label":"Database"},
-  {"op":"link","source":"u","target":"api","label":"POST /login","step":1},
-  {"op":"link","source":"api","target":"db","label":"find user","step":2},
-  {"op":"link","source":"db","target":"api","label":"user record","step":3},
-  {"op":"link","source":"api","target":"u","label":"JWT","step":4}
-]}
-
-add_radial: a MIND MAP or ORG CHART. Add every node with the radial container as its parent — a FLAT list, never nested inside another box — and let the links carry the hierarchy: link parent to child. The node nothing points at becomes the centre. spread "radial" fans branches out both sides (a mind map); "down" hangs everything below its parent (an org chart, where a reporting line only reads correctly downwards).
-{"operations":[
-  {"op":"add_radial","id":"o","label":"","spread":"down"},
-  {"op":"add_box","id":"ceo","parent":"o","label":"CEO"},
-  {"op":"add_box","id":"cto","parent":"o","label":"CTO"},
-  {"op":"add_box","id":"lead","parent":"o","label":"Platform Lead"},
-  {"op":"link","source":"ceo","target":"cto"},{"op":"link","source":"cto","target":"lead"}
-]}
-
-BOX SHAPES: add_box takes shape — "decision" for a branch (diamond), "terminator" for a start/end point, "data" for input or output, "document" for a report, "round" for a soft-edged step. Use them; a reader takes a diamond to mean a choice.`,
+Example: If previous output ended with '<mxCell id="x" style="rounded=1', continue with ';" vertex="1">...' and complete the remaining elements.`,
                inputSchema: z.object({
-                    operations: z
-                        .array(OperationSchema)
-                        .describe("Structural operations, applied in order"),
-                }),
-            },
-            search_stencils: {
-                description: `Find AWS stencil names for restructure_diagram. Returns names and official colours — call this before naming an icon, and batch the whole diagram's lookups into as few calls as possible.`,
-                inputSchema: z.object({
-                    query: z
+                    xml: z
                        .string()
                        .describe(
-                            "Service name or keyword, e.g. 's3' or 'nat gateway'",
+                            "Continuation XML fragment to append (NO wrapper tags)",
                        ),
-                    kind: z
-                        .enum(["icon", "group"])
-                        .optional()
-                        .describe(
-                            "Restrict to service icons or container frames",
-                        ),
-                    limit: z.number().optional(),
                }),
-                execute: async ({ query, kind, limit }) => {
-                    const hits = searchStencils(query, { kind, limit })
-                    if (hits.length === 0)
-                        return `No stencil matches "${query}". Try a shorter or more general term.`
-                    return JSON.stringify(hits)
+            },
+            get_shape_library: {
+                description: `Get draw.io shape/icon library documentation with style syntax and shape names.
+
+Available libraries:
+- Cloud: aws4, azure2, gcp2, alibaba_cloud, openstack, salesforce
+- Networking: cisco19, network, kubernetes, vvd, rack
+- Business: bpmn, lean_mapping
+- General: flowchart, basic, arrows2, infographic, sitemap
+- UI/Mockups: android
+- Enterprise: citrix, sap, mscae, atlassian
+- Engineering: fluidpower, electrical, pid, cabinets, floorplan
+- Icons: webicons
+
+Call this tool to get shape names and usage syntax for a specific library.`,
+                inputSchema: z.object({
+                    library: z
+                        .string()
+                        .describe(
+                            "Library name (e.g., 'aws4', 'kubernetes', 'flowchart')",
+                        ),
+                }),
+                execute: async ({ library }) => {
+                    // Sanitize input - prevent path traversal attacks
+                    const sanitizedLibrary = library
+                        .toLowerCase()
+                        .replace(/[^a-z0-9_-]/g, "")
+
+                    if (sanitizedLibrary !== library.toLowerCase()) {
+                        return `Invalid library name "${library}". Use only letters, numbers, underscores, and hyphens.`
+                    }
+
+                    const baseDir = path.join(
+                        process.cwd(),
+                        "docs/shape-libraries",
+                    )
+                    const filePath = path.join(
+                        baseDir,
+                        `${sanitizedLibrary}.md`,
+                    )
+
+                    // Verify path stays within expected directory
+                    const resolvedPath = path.resolve(filePath)
+                    if (!resolvedPath.startsWith(path.resolve(baseDir))) {
+                        return `Invalid library path.`
+                    }
+
+                    try {
+                        const content = await fs.readFile(filePath, "utf-8")
+                        return content
+                    } catch (error) {
+                        if (
+                            (error as NodeJS.ErrnoException).code === "ENOENT"
+                        ) {
+                            return `Library "${library}" not found. Available: aws4, azure2, gcp2, alibaba_cloud, cisco19, kubernetes, network, bpmn, flowchart, basic, arrows2, vvd, salesforce, citrix, sap, mscae, atlassian, fluidpower, electrical, pid, cabinets, floorplan, webicons, infographic, sitemap, android, lean_mapping, openstack, rack`
+                        }
+                        console.error(
+                            `[get_shape_library] Error loading "${library}":`,
+                            error,
+                        )
+                        return `Error loading library "${library}". Please try again.`
+                    }
                },
            },
        },
@@ -1,34 +1,58 @@
-import { extractFromHtml } from "@extractus/article-extractor"
+import { extract } from "@extractus/article-extractor"
 import { NextResponse } from "next/server"
 import TurndownService from "turndown"
-import { isPrivateUrl } from "@/lib/ssrf-protection"

 const MAX_CONTENT_LENGTH = 150000 // Match PDF limit
 const EXTRACT_TIMEOUT_MS = 15000
-const USER_AGENT = "Mozilla/5.0 (compatible; NextAIDrawio/1.0)"

-// Detect the page's charset so non-UTF-8 pages (Shift_JIS/GBK/EUC/Big5, common
-// on CJK sites) are decoded correctly. Response.text() always assumes UTF-8 and
-// would produce mojibake; the article-extractor library does the same detection
-// when it fetches the page itself, which we no longer rely on.
-function detectCharset(
-    contentType: string | null,
-    buffer: ArrayBuffer,
-): string {
-    // 1. HTTP Content-Type header charset (most authoritative).
-    const headerCharset = contentType?.match(/charset=([^;]+)/i)?.[1]?.trim()
-    // 2. <meta charset> / <meta http-equiv> in the first bytes of the document.
-    const head = new TextDecoder("utf-8").decode(buffer.slice(0, 4096))
-    const metaCharset =
-        head.match(/<meta[^>]+charset=["']?\s*([\w-]+)/i)?.[1] ||
-        head.match(/<meta[^>]+content=["'][^"']*charset=([\w-]+)/i)?.[1]
-    const charset = (headerCharset || metaCharset || "utf-8").toLowerCase()
-    // TextDecoder throws on unknown encoding labels; fall back to UTF-8.
+// SSRF protection - block private/internal addresses
+function isPrivateUrl(urlString: string): boolean {
    try {
-        new TextDecoder(charset)
-        return charset
+        const url = new URL(urlString)
+        const hostname = url.hostname.toLowerCase()
+
+        // Block localhost
+        if (
+            hostname === "localhost" ||
+            hostname === "127.0.0.1" ||
+            hostname === "::1"
+        ) {
+            return true
+        }
+
+        // Block AWS/cloud metadata endpoints
+        if (
+            hostname === "169.254.169.254" ||
+            hostname === "metadata.google.internal"
+        ) {
+            return true
+        }
+
+        // Check for private IPv4 ranges
+        const ipv4Match = hostname.match(
+            /^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/,
+        )
+        if (ipv4Match) {
+            const [, a, b] = ipv4Match.map(Number)
+            if (a === 10) return true // 10.0.0.0/8
+            if (a === 172 && b >= 16 && b <= 31) return true // 172.16.0.0/12
+            if (a === 192 && b === 168) return true // 192.168.0.0/16
+            if (a === 169 && b === 254) return true // 169.254.0.0/16 (link-local)
+            if (a === 127) return true // 127.0.0.0/8 (loopback)
+        }
+
+        // Block common internal hostnames
+        if (
+            hostname.endsWith(".local") ||
+            hostname.endsWith(".internal") ||
+            hostname.endsWith(".localhost")
+        ) {
+            return true
+        }
+
+        return false
    } catch {
-        return "utf-8"
+        return true // Invalid URL - block it
    }
 }

@@ -53,53 +77,28 @@ export async function POST(req: Request) {
            )
        }

-        // SSRF protection: parse-url has no use case for fetching internal
-        // hosts, so private URLs are always rejected. ALLOW_PRIVATE_URLS only
-        // governs LLM provider baseUrl overrides (validate-model, chat).
-        if (await isPrivateUrl(url)) {
+        // SSRF protection
+        if (isPrivateUrl(url)) {
            return NextResponse.json(
                { error: "Cannot access private/internal URLs" },
                { status: 400 },
            )
        }
-        // Fetch the page ourselves so we control redirect handling. The
-        // article-extractor library follows redirects internally and ignores a
-        // `redirect` option, which would let a public URL 302 to an internal
-        // host and bypass the SSRF check above. `redirect: "error"` rejects any
-        // redirect outright.
+
+        // Extract article content with timeout to avoid tying up server resources
        const controller = new AbortController()
        const timeoutId = setTimeout(() => {
            controller.abort()
        }, EXTRACT_TIMEOUT_MS)

-        let html: string
+        let article
        try {
-            const response = await fetch(url, {
-                headers: { "User-Agent": USER_AGENT },
-                redirect: "error",
+            article = await extract(url, undefined, {
+                headers: {
+                    "User-Agent": "Mozilla/5.0 (compatible; NextAIDrawio/1.0)",
+                },
                signal: controller.signal,
            })
-
-            const contentType = response.headers.get("content-type")
-            if (contentType?.includes("application/pdf")) {
-                return NextResponse.json(
-                    {
-                        error: "PDF URLs are not supported. Please download and upload the PDF file directly",
-                    },
-                    { status: 422 },
-                )
-            }
-
-            if (!response.ok) {
-                return NextResponse.json(
-                    { error: "Could not fetch URL content" },
-                    { status: 400 },
-                )
-            }
-
-            const buffer = await response.arrayBuffer()
-            const charset = detectCharset(contentType, buffer)
-            html = new TextDecoder(charset).decode(buffer)
        } catch (err: any) {
            if (err?.name === "AbortError") {
                return NextResponse.json(
@@ -107,25 +106,11 @@ export async function POST(req: Request) {
                    { status: 504 },
                )
            }
-            // Redirects are rejected with a TypeError ("failed to fetch" /
-            // "unexpected redirect") when redirect: "error" is set.
-            return NextResponse.json(
-                { error: "Could not fetch URL content" },
-                { status: 400 },
-            )
+            throw err
        } finally {
            clearTimeout(timeoutId)
        }

-        // extractFromHtml throws (not returns null) on empty/non-HTML bodies,
-        // so map any parse error to the same 400 as the no-content case.
-        let article: Awaited<ReturnType<typeof extractFromHtml>>
-        try {
-            article = await extractFromHtml(html, url)
-        } catch {
-            article = null
-        }
-
        if (!article || !article.content) {
            return NextResponse.json(
                { error: "Could not extract content from URL" },
@@ -1,14 +0,0 @@
-import { NextResponse } from "next/server"
-import { loadFlattenedServerModels } from "@/lib/server-model-config"
-
-// Use dynamic rendering to read AI_MODEL/AI_PROVIDER env vars at runtime
-// This ensures Docker users can set these values when starting containers
-export const dynamic = "force-dynamic"
-
-export async function GET() {
-    const models = await loadFlattenedServerModels()
-    return NextResponse.json({
-        models,
-        hasConfig: models.length > 0,
-    })
-}
@@ -1,136 +0,0 @@
-/**
- * API endpoint for VLM-based diagram validation.
- * Accepts a PNG image and streams validation results using useObject-compatible format.
- */
-
-import { streamObject } from "ai"
-import { getValidationModel } from "@/lib/ai-providers"
-import { VALIDATION_SYSTEM_PROMPT } from "@/lib/validation-prompts"
-import {
-    type ValidationResult,
-    ValidationResultSchema,
-} from "@/lib/validation-schema"
-
-export const maxDuration = 30
-
-interface ValidateDiagramRequest {
-    imageData: string // Base64 PNG data URL
-    sessionId?: string
-}
-
-// Default valid result for disabled/error cases
-const DEFAULT_VALID_RESULT: ValidationResult = {
-    valid: true,
-    issues: [],
-    suggestions: [],
-}
-
-/**
- * Create a streaming response for useObject compatibility.
- * useObject expects text stream format, not plain JSON.
- */
-function createStreamingResponse(result: ValidationResult): Response {
-    const encoder = new TextEncoder()
-    const stream = new ReadableStream({
-        start(controller) {
-            // Stream the JSON as text (useObject parses this)
-            controller.enqueue(encoder.encode(JSON.stringify(result)))
-            controller.close()
-        },
-    })
-    return new Response(stream, {
-        headers: { "Content-Type": "text/plain; charset=utf-8" },
-    })
-}
-
-export async function POST(req: Request): Promise<Response> {
-    try {
-        // Check if VLM validation is enabled (default: true)
-        const enableValidation = process.env.ENABLE_VLM_VALIDATION !== "false"
-        if (!enableValidation) {
-            return createStreamingResponse(DEFAULT_VALID_RESULT)
-        }
-
-        const body: ValidateDiagramRequest = await req.json()
-        const { imageData, sessionId } = body
-
-        if (!imageData) {
-            return Response.json(
-                { error: "Missing imageData" },
-                { status: 400 },
-            )
-        }
-
-        // Validate image data format
-        if (
-            !imageData.startsWith("data:image/png;base64,") &&
-            !imageData.startsWith("data:image/")
-        ) {
-            return Response.json(
-                { error: "Invalid image data format" },
-                { status: 400 },
-            )
-        }
-
-        // Get the validation model
-        let model
-        try {
-            model = getValidationModel()
-        } catch (error) {
-            console.warn(
-                "[validate-diagram] Validation model not available:",
-                error,
-            )
-            // Return valid if no vision model is configured
-            return createStreamingResponse(DEFAULT_VALID_RESULT)
-        }
-
-        // Parse timeout with validation (minimum 1000ms, default 10000ms)
-        const timeout =
-            Math.max(
-                1000,
-                parseInt(process.env.VALIDATION_TIMEOUT || "10000", 10),
-            ) || 10000
-
-        // Stream the VLM response for useObject consumption
-        const result = streamObject({
-            model,
-            schema: ValidationResultSchema,
-            system: VALIDATION_SYSTEM_PROMPT,
-            messages: [
-                {
-                    role: "user",
-                    content: [
-                        {
-                            type: "image",
-                            image: imageData,
-                        },
-                        {
-                            type: "text",
-                            text: "Please analyze this diagram for visual quality issues.",
-                        },
-                    ],
-                },
-            ],
-            maxOutputTokens: 1024,
-            abortSignal: AbortSignal.timeout(timeout),
-            onFinish: ({ object }) => {
-                if (sessionId && object) {
-                    console.log(
-                        `[validate-diagram] Session ${sessionId}: valid=${object.valid}, issues=${object.issues?.length ?? 0}`,
-                    )
-                }
-            },
-        })
-
-        return result.toTextStreamResponse()
-    } catch (error) {
-        // Log with session context if available
-        const errorMessage =
-            error instanceof Error ? error.message : String(error)
-        console.error("[validate-diagram] Error:", errorMessage)
-
-        // On error, return valid to not block the user
-        return createStreamingResponse(DEFAULT_VALID_RESULT)
-    }
-}
@@ -3,23 +3,74 @@ import { createAnthropic } from "@ai-sdk/anthropic"
 import { createDeepSeek, deepseek } from "@ai-sdk/deepseek"
 import { createGateway } from "@ai-sdk/gateway"
 import { createGoogleGenerativeAI } from "@ai-sdk/google"
-import { createVertex } from "@ai-sdk/google-vertex"
 import { createOpenAI } from "@ai-sdk/openai"
-import { createAihubmix } from "@aihubmix/ai-sdk-provider"
 import { createOpenRouter } from "@openrouter/ai-sdk-provider"
 import { generateText } from "ai"
 import { NextResponse } from "next/server"
 import { createOllama } from "ollama-ai-provider-v2"
-import {
-    AIHUBMIX_APP_CODE,
-    isAihubmixStandardBaseURL,
-    normalizeMiniMaxBaseURL,
-} from "@/lib/ai-providers"
-import { allowPrivateUrls, isPrivateUrl } from "@/lib/ssrf-protection"
-import { PROVIDER_INFO, type ProviderName } from "@/lib/types/model-config"

 export const runtime = "nodejs"

+/**
+ * SECURITY: Check if URL points to private/internal network (SSRF protection)
+ * Blocks: localhost, private IPs, link-local, AWS metadata service
+ */
+function isPrivateUrl(urlString: string): boolean {
+    try {
+        const url = new URL(urlString)
+        const hostname = url.hostname.toLowerCase()
+
+        // Block localhost
+        if (
+            hostname === "localhost" ||
+            hostname === "127.0.0.1" ||
+            hostname === "::1"
+        ) {
+            return true
+        }
+
+        // Block AWS/cloud metadata endpoints
+        if (
+            hostname === "169.254.169.254" ||
+            hostname === "metadata.google.internal"
+        ) {
+            return true
+        }
+
+        // Check for private IPv4 ranges
+        const ipv4Match = hostname.match(
+            /^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/,
+        )
+        if (ipv4Match) {
+            const [, a, b] = ipv4Match.map(Number)
+            // 10.0.0.0/8
+            if (a === 10) return true
+            // 172.16.0.0/12
+            if (a === 172 && b >= 16 && b <= 31) return true
+            // 192.168.0.0/16
+            if (a === 192 && b === 168) return true
+            // 169.254.0.0/16 (link-local)
+            if (a === 169 && b === 254) return true
+            // 127.0.0.0/8 (loopback)
+            if (a === 127) return true
+        }
+
+        // Block common internal hostnames
+        if (
+            hostname.endsWith(".local") ||
+            hostname.endsWith(".internal") ||
+            hostname.endsWith(".localhost")
+        ) {
+            return true
+        }
+
+        return false
+    } catch {
+        // Invalid URL - block it
+        return true
+    }
+}
+
 interface ValidateRequest {
    provider: string
    apiKey: string
@@ -29,8 +80,6 @@ interface ValidateRequest {
    awsAccessKeyId?: string
    awsSecretAccessKey?: string
    awsRegion?: string
-    // Vertex AI specific
-    vertexApiKey?: string // Express Mode API key
 }

 export async function POST(req: Request) {
@@ -44,8 +93,6 @@ export async function POST(req: Request) {
            awsAccessKeyId,
            awsSecretAccessKey,
            awsRegion,
-            // Note: Express Mode only needs vertexApiKey
-            vertexApiKey,
        } = body

        if (!provider || !modelId) {
@@ -56,7 +103,7 @@ export async function POST(req: Request) {
        }

        // SECURITY: Block SSRF attacks via custom baseUrl
-        if (baseUrl && !allowPrivateUrls() && (await isPrivateUrl(baseUrl))) {
+        if (baseUrl && isPrivateUrl(baseUrl)) {
            return NextResponse.json(
                { valid: false, error: "Invalid base URL" },
                { status: 400 },
@@ -74,16 +121,6 @@ export async function POST(req: Request) {
                    { status: 400 },
                )
            }
-        } else if (provider === "vertexai") {
-            if (!vertexApiKey) {
-                return NextResponse.json(
-                    {
-                        valid: false,
-                        error: "Vertex AI API key is required for Express Mode",
-                    },
-                    { status: 400 },
-                )
-            }
        } else if (provider !== "ollama" && provider !== "edgeone" && !apiKey) {
            return NextResponse.json(
                { valid: false, error: "API key is required" },
@@ -121,15 +158,6 @@ export async function POST(req: Request) {
                break
            }

-            case "vertexai": {
-                const vertex = createVertex({
-                    apiKey: vertexApiKey,
-                    ...(baseUrl && { baseURL: baseUrl }),
-                })
-                model = vertex(modelId)
-                break
-            }
-
            case "azure": {
                const azure = createOpenAI({
                    apiKey,
@@ -158,28 +186,6 @@ export async function POST(req: Request) {
                break
            }

-            case "aihubmix": {
-                const defaultBaseURL = PROVIDER_INFO.aihubmix.defaultBaseUrl
-
-                if (
-                    isAihubmixStandardBaseURL(baseUrl) ||
-                    baseUrl === defaultBaseURL
-                ) {
-                    const aihubmix = createAihubmix({
-                        apiKey,
-                        appCode: AIHUBMIX_APP_CODE,
-                    })
-                    model = aihubmix(modelId)
-                } else {
-                    const aihubmixCompatible = createOpenAI({
-                        apiKey,
-                        baseURL: baseUrl,
-                    })
-                    model = aihubmixCompatible.chat(modelId)
-                }
-                break
-            }
-
            case "deepseek": {
                if (baseUrl || apiKey) {
                    const ds = createDeepSeek({
@@ -203,21 +209,10 @@ export async function POST(req: Request) {
            }

            case "ollama": {
-                // SECURITY: Mirror ai-providers.ts guard — only use server
-                // OLLAMA_API_KEY when the URL is also from server config.
-                const ollamaApiKey = baseUrl
-                    ? apiKey || undefined
-                    : apiKey || process.env.OLLAMA_API_KEY || undefined
-                const ollamaProvider = createOllama({
-                    baseURL:
-                        baseUrl ||
-                        process.env.OLLAMA_BASE_URL ||
-                        "https://ollama.com/api",
-                    ...(ollamaApiKey && {
-                        headers: { Authorization: `Bearer ${ollamaApiKey}` },
-                    }),
+                const ollama = createOllama({
+                    baseURL: baseUrl || "http://localhost:11434",
                })
-                model = ollamaProvider(modelId)
+                model = ollama(modelId)
                break
            }

@@ -348,61 +343,6 @@ export async function POST(req: Request) {
                }
            }

-            case "minimax": {
-                const rawUrl =
-                    baseUrl ||
-                    PROVIDER_INFO.minimax?.defaultBaseUrl ||
-                    "https://api.minimaxi.com/anthropic"
-                const { baseURL: minimaxBaseUrl, isAnthropicCompatible } =
-                    normalizeMiniMaxBaseURL(rawUrl)
-
-                if (isAnthropicCompatible) {
-                    const minimax = createAnthropic({
-                        apiKey,
-                        baseURL: minimaxBaseUrl,
-                    })
-                    model = minimax.chat(modelId)
-                } else {
-                    const minimax = createOpenAI({
-                        apiKey,
-                        baseURL: minimaxBaseUrl,
-                    })
-                    model = minimax.chat(modelId)
-                }
-                break
-            }
-
-            // GLM, Qwen, Kimi, Qiniu, Novita, MiMo, Atlas Cloud - OpenAI compatible
-            case "glm":
-            case "qwen":
-            case "kimi":
-            case "qiniu":
-            case "novita":
-            case "atlascloud":
-            case "mimo": {
-                const baseURL =
-                    baseUrl ||
-                    PROVIDER_INFO[provider as ProviderName]?.defaultBaseUrl ||
-                    ""
-
-                if (!baseURL) {
-                    return NextResponse.json(
-                        {
-                            valid: false,
-                            error: `No base URL configured for provider: ${provider}`,
-                        },
-                        { status: 400 },
-                    )
-                }
-
-                const openai = createOpenAI({
-                    apiKey,
-                    baseURL,
-                })
-                model = openai.chat(modelId)
-                break
-            }
-
            default:
                return NextResponse.json(
                    { valid: false, error: `Unknown provider: ${provider}` },
@@ -1,13 +1,12 @@
 {
-    "$schema": "https://biomejs.dev/schemas/2.4.14/schema.json",
+    "$schema": "https://biomejs.dev/schemas/2.3.10/schema.json",
    "vcs": {
        "enabled": true,
        "clientKind": "git",
        "useIgnoreFile": true
    },
    "files": {
-        "ignoreUnknown": false,
-        "includes": ["**", "!public"]
+        "ignoreUnknown": false
    },
    "formatter": {
        "enabled": true,
@@ -1,6 +1,5 @@
 import { Cloud } from "lucide-react"
-import type { ComponentProps, ElementRef, ReactNode } from "react"
-import { useEffect, useRef, useState } from "react"
+import type { ComponentProps, ReactNode } from "react"
 import {
    Command,
    CommandDialog,
@@ -70,62 +69,20 @@ export type ModelSelectorListProps = ComponentProps<typeof CommandList>
 export const ModelSelectorList = ({
    className,
    ...props
-}: ModelSelectorListProps) => {
-    const listRef = useRef<ElementRef<typeof CommandList>>(null)
-    const [showShadow, setShowShadow] = useState(false)
-
-    useEffect(() => {
-        const listElement = listRef.current
-        if (!listElement) return
-
-        const checkScroll = () => {
-            const { scrollTop, scrollHeight, clientHeight } = listElement
-            // Show shadow if there is more content below
-            // Using a small threshold to handle fractional pixel rendering
-            setShowShadow(
-                scrollHeight > Math.ceil(scrollTop + clientHeight) + 1,
-            )
-        }
-
-        // Initial check
-        checkScroll()
-
-        // Event listeners
-        listElement.addEventListener("scroll", checkScroll)
-        window.addEventListener("resize", checkScroll)
-
-        // Observe content changes (e.g. async loading of items)
-        const observer = new MutationObserver(checkScroll)
-        observer.observe(listElement, { childList: true, subtree: true })
-
-        return () => {
-            listElement.removeEventListener("scroll", checkScroll)
-            window.removeEventListener("resize", checkScroll)
-            observer.disconnect()
-        }
-    }, [])
-
-    return (
-        <div className="relative">
-            <CommandList
-                ref={listRef}
-                className={cn(
-                    // Hide scrollbar on all platforms
-                    "[&::-webkit-scrollbar]:hidden [-ms-overflow-style:none] [scrollbar-width:none]",
-                    className,
-                )}
-                {...props}
-            />
-            {/* Bottom shadow indicator for scrollable content */}
-            <div
-                className={cn(
-                    "pointer-events-none absolute bottom-0 left-0 right-0 h-12 bg-gradient-to-t from-muted/80 via-muted/40 to-transparent transition-opacity duration-200",
-                    showShadow ? "opacity-100" : "opacity-0",
-                )}
-            />
-        </div>
-    )
-}
+}: ModelSelectorListProps) => (
+    <div className="relative">
+        <CommandList
+            className={cn(
+                // Hide scrollbar on all platforms
+                "[&::-webkit-scrollbar]:hidden [-ms-overflow-style:none] [scrollbar-width:none]",
+                className,
+            )}
+            {...props}
+        />
+        {/* Bottom shadow indicator for scrollable content */}
+        <div className="pointer-events-none absolute bottom-0 left-0 right-0 h-12 bg-gradient-to-t from-muted/80 via-muted/40 to-transparent" />
+    </div>
+)

 export type ModelSelectorEmptyProps = ComponentProps<typeof CommandEmpty>

@@ -212,27 +169,3 @@ export const ModelSelectorName = ({
 }: ModelSelectorNameProps) => (
    <span className={cn("flex-1 truncate text-left", className)} {...props} />
 )
-
-export type ModelSelectorSectionHeaderProps = {
-    icon: ReactNode
-    label: string
-    className?: string
-}
-
-export const ModelSelectorSectionHeader = ({
-    icon,
-    label,
-    className,
-}: ModelSelectorSectionHeaderProps) => (
-    <div
-        className={cn(
-            "flex items-center gap-2 px-2 py-1.5 text-xs font-semibold text-muted-foreground bg-muted/40 rounded-sm mx-1 mt-1",
-            className,
-        )}
-    >
-        <span className="[&>svg]:size-3.5" aria-hidden="true">
-            {icon}
-        </span>
-        <span>{label}</span>
-    </div>
-)
@@ -141,6 +141,9 @@ export default function ExamplePanel({
                                    <span className="text-sm font-medium text-foreground group-hover:text-purple-500 transition-colors">
                                        {dict.examples.mcpServer}
                                    </span>
+                                    <span className="px-1.5 py-0.5 text-[10px] font-semibold bg-purple-500 text-white rounded">
+                                        {dict.examples.preview}
+                                    </span>
                                </div>
                                <p className="text-xs text-muted-foreground">
                                    {dict.examples.mcpDescription}
@@ -1,26 +1,17 @@
 "use client"

 import {
-    BookmarkPlus,
    Download,
    History,
    Image as ImageIcon,
    Link,
+    Loader2,
    Send,
-    Square,
 } from "lucide-react"
 import type React from "react"
-import {
-    forwardRef,
-    useCallback,
-    useEffect,
-    useImperativeHandle,
-    useRef,
-    useState,
-} from "react"
+import { useCallback, useEffect, useRef, useState } from "react"
 import { toast } from "sonner"
 import { ButtonWithTooltip } from "@/components/button-with-tooltip"
-import { TemplateCreateDialog } from "@/components/chat/TemplateCreateDialog"
 import { ErrorToast } from "@/components/error-toast"
 import { HistoryDialog } from "@/components/history-dialog"
 import { ModelSelector } from "@/components/model-selector"
@@ -33,10 +24,8 @@ import { useDiagram } from "@/contexts/diagram-context"
 import { useDictionary } from "@/hooks/use-dictionary"
 import { formatMessage } from "@/lib/i18n/utils"
 import { isPdfFile, isTextFile } from "@/lib/pdf-utils"
-import { STORAGE_KEYS } from "@/lib/storage"
 import type { FlattenedModel } from "@/lib/types/model-config"
 import { extractUrlContent, type UrlData } from "@/lib/url-utils"
-import { isRealDiagram } from "@/lib/utils"
 import { FilePreviewList } from "./file-preview-list"

 const MAX_IMAGE_SIZE = 2 * 1024 * 1024 // 2MB
@@ -147,16 +136,11 @@ function showValidationErrors(errors: string[], dict: any) {
    }
 }

-export interface ChatInputRef {
-    focus: () => void
-}
-
 interface ChatInputProps {
    input: string
    status: "submitted" | "streaming" | "ready" | "error"
    onSubmit: (e: React.FormEvent<HTMLFormElement>) => void
    onChange: (e: React.ChangeEvent<HTMLTextAreaElement>) => void
-    onStop?: () => void
    files?: File[]
    onFileChange?: (files: File[]) => void
    pdfData?: Map<
@@ -172,221 +156,98 @@ interface ChatInputProps {
    models?: FlattenedModel[]
    selectedModelId?: string
    onModelSelect?: (modelId: string | undefined) => void
-    onConfigureModels?: () => void
    showUnvalidatedModels?: boolean
-    // Focus control props
-    shouldFocus?: boolean
-    onFocused?: () => void
+    onConfigureModels?: () => void
 }

-export const ChatInput = forwardRef<ChatInputRef, ChatInputProps>(
-    function ChatInput(
-        {
-            input,
-            status,
-            onSubmit,
-            onChange,
-            onStop,
-            files = [],
-            onFileChange = () => {},
-            pdfData = new Map(),
-            urlData,
-            onUrlChange,
-            sessionId,
-            error = null,
-            models = [],
-            selectedModelId,
-            onModelSelect = () => {},
-            onConfigureModels,
-            showUnvalidatedModels = false,
-            shouldFocus = false,
-            onFocused,
-        },
-        ref,
-    ) {
-        const dict = useDictionary()
-        const {
-            chartXML,
-            diagramHistory,
-            saveDiagramToFile,
-            showSaveDialog,
-            setShowSaveDialog,
-        } = useDiagram()
+export function ChatInput({
+    input,
+    status,
+    onSubmit,
+    onChange,
+    files = [],
+    onFileChange = () => {},
+    pdfData = new Map(),
+    urlData,
+    onUrlChange,
+    sessionId,
+    error = null,
+    models = [],
+    selectedModelId,
+    onModelSelect = () => {},
+    showUnvalidatedModels = false,
+    onConfigureModels = () => {},
+}: ChatInputProps) {
+    const dict = useDictionary()
+    const {
+        diagramHistory,
+        saveDiagramToFile,
+        showSaveDialog,
+        setShowSaveDialog,
+    } = useDiagram()

-        const textareaRef = useRef<HTMLTextAreaElement>(null)
-        const fileInputRef = useRef<HTMLInputElement>(null)
-        const [isDragging, setIsDragging] = useState(false)
+    const textareaRef = useRef<HTMLTextAreaElement>(null)
+    const fileInputRef = useRef<HTMLInputElement>(null)
+    const [isDragging, setIsDragging] = useState(false)
+    const [showHistory, setShowHistory] = useState(false)
+    const [showUrlDialog, setShowUrlDialog] = useState(false)
+    const [isExtractingUrl, setIsExtractingUrl] = useState(false)
+    // Allow retry when there's an error (even if status is still "streaming" or "submitted")
+    const isDisabled =
+        (status === "streaming" || status === "submitted") && !error

-        // Expose focus method via ref
-        useImperativeHandle(ref, () => ({
-            focus: () => {
-                textareaRef.current?.focus()
-            },
-        }))
+    const adjustTextareaHeight = useCallback(() => {
+        const textarea = textareaRef.current
+        if (textarea) {
+            textarea.style.height = "auto"
+            textarea.style.height = `${Math.min(textarea.scrollHeight, 200)}px`
+        }
+    }, [])
+    // Handle programmatic input changes (e.g., setInput("") after form submission)
+    useEffect(() => {
+        adjustTextareaHeight()
+    }, [input, adjustTextareaHeight])

-        // Focus the textarea when shouldFocus becomes true
-        // Use setTimeout to ensure focus happens after drawio iframe settles
-        useEffect(() => {
-            if (shouldFocus) {
-                const timer = setTimeout(() => {
-                    textareaRef.current?.focus()
-                    onFocused?.()
-                }, 150)
-                return () => clearTimeout(timer)
+    const handleChange = (e: React.ChangeEvent<HTMLTextAreaElement>) => {
+        onChange(e)
+        adjustTextareaHeight()
+    }
+
+    const handleKeyDown = (e: React.KeyboardEvent) => {
+        if ((e.metaKey || e.ctrlKey) && e.key === "Enter") {
+            e.preventDefault()
+            const form = e.currentTarget.closest("form")
+            if (form && input.trim() && !isDisabled) {
+                form.requestSubmit()
            }
-        }, [shouldFocus, onFocused])
+        }
+    }

-        const [showHistory, setShowHistory] = useState(false)
-        const [showUrlDialog, setShowUrlDialog] = useState(false)
-        const [showSaveAsTemplate, setShowSaveAsTemplate] = useState(false)
-        const [isExtractingUrl, setIsExtractingUrl] = useState(false)
-        const [sendShortcut, setSendShortcut] = useState("ctrl-enter")
-        // Allow retry when there's an error (even if status is still "streaming" or "submitted")
-        const isDisabled =
-            (status === "streaming" || status === "submitted") && !error
+    const handlePaste = async (e: React.ClipboardEvent) => {
+        if (isDisabled) return

-        const adjustTextareaHeight = useCallback(() => {
-            const textarea = textareaRef.current
-            if (textarea) {
-                textarea.style.height = "auto"
-                textarea.style.height = `${Math.min(textarea.scrollHeight, 200)}px`
-            }
-        }, [])
-        // Handle programmatic input changes (e.g., setInput("") after form submission)
-        useEffect(() => {
-            adjustTextareaHeight()
-        }, [input, adjustTextareaHeight])
+        const items = e.clipboardData.items
+        const imageItems = Array.from(items).filter((item) =>
+            item.type.startsWith("image/"),
+        )

-        // Load send shortcut preference from localStorage and listen for changes
-        useEffect(() => {
-            const stored = localStorage.getItem(STORAGE_KEYS.sendShortcut)
-            if (stored) setSendShortcut(stored)
-
-            const handleChange = (e: CustomEvent<string>) =>
-                setSendShortcut(e.detail)
-            window.addEventListener(
-                "sendShortcutChange",
-                handleChange as EventListener,
-            )
-            return () =>
-                window.removeEventListener(
-                    "sendShortcutChange",
-                    handleChange as EventListener,
+        if (imageItems.length > 0) {
+            const imageFiles = (
+                await Promise.all(
+                    imageItems.map(async (item, index) => {
+                        const file = item.getAsFile()
+                        if (!file) return null
+                        return new File(
+                            [file],
+                            `pasted-image-${Date.now()}-${index}.${file.type.split("/")[1]}`,
+                            { type: file.type },
+                        )
+                    }),
                )
-        }, [])
-
-        const handleChange = (e: React.ChangeEvent<HTMLTextAreaElement>) => {
-            onChange(e)
-            adjustTextareaHeight()
-        }
-
-        const handleKeyDown = (e: React.KeyboardEvent) => {
-            const shouldSend =
-                sendShortcut === "enter"
-                    ? e.key === "Enter" &&
-                      !e.shiftKey &&
-                      !e.ctrlKey &&
-                      !e.metaKey
-                    : (e.metaKey || e.ctrlKey) && e.key === "Enter"
-
-            if (shouldSend) {
-                e.preventDefault()
-                const form = e.currentTarget.closest("form")
-                if (form && input.trim() && !isDisabled) {
-                    form.requestSubmit()
-                }
-            }
-        }
-
-        const handlePaste = async (e: React.ClipboardEvent) => {
-            if (isDisabled) return
-
-            const items = e.clipboardData.items
-            const imageItems = Array.from(items).filter((item) =>
-                item.type.startsWith("image/"),
-            )
-
-            if (imageItems.length > 0) {
-                const imageFiles = (
-                    await Promise.all(
-                        imageItems.map(async (item, index) => {
-                            const file = item.getAsFile()
-                            if (!file) return null
-                            return new File(
-                                [file],
-                                `pasted-image-${Date.now()}-${index}.${file.type.split("/")[1]}`,
-                                { type: file.type },
-                            )
-                        }),
-                    )
-                ).filter((f): f is File => f !== null)
-
-                const { validFiles, errors } = validateFiles(
-                    imageFiles,
-                    files.length,
-                    dict,
-                )
-                showValidationErrors(errors, dict)
-                if (validFiles.length > 0) {
-                    onFileChange([...files, ...validFiles])
-                }
-            }
-        }
-
-        const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
-            const newFiles = Array.from(e.target.files || [])
-            const { validFiles, errors } = validateFiles(
-                newFiles,
-                files.length,
-                dict,
-            )
-            showValidationErrors(errors, dict)
-            if (validFiles.length > 0) {
-                onFileChange([...files, ...validFiles])
-            }
-
-            if (fileInputRef.current) {
-                fileInputRef.current.value = ""
-            }
-        }
-
-        const handleRemoveFile = (fileToRemove: File) => {
-            onFileChange(files.filter((file) => file !== fileToRemove))
-            if (fileInputRef.current) {
-                fileInputRef.current.value = ""
-            }
-        }
-
-        const triggerFileInput = () => {
-            fileInputRef.current?.click()
-        }
-
-        const handleDragOver = (e: React.DragEvent<HTMLFormElement>) => {
-            e.preventDefault()
-            e.stopPropagation()
-            setIsDragging(true)
-        }
-
-        const handleDragLeave = (e: React.DragEvent<HTMLFormElement>) => {
-            e.preventDefault()
-            e.stopPropagation()
-            setIsDragging(false)
-        }
-
-        const handleDrop = (e: React.DragEvent<HTMLFormElement>) => {
-            e.preventDefault()
-            e.stopPropagation()
-            setIsDragging(false)
-
-            if (isDisabled) return
-
-            const droppedFiles = e.dataTransfer.files
-            const supportedFiles = Array.from(droppedFiles).filter((file) =>
-                isValidFileType(file),
-            )
+            ).filter((f): f is File => f !== null)

            const { validFiles, errors } = validateFiles(
-                supportedFiles,
+                imageFiles,
                files.length,
                dict,
            )
@@ -395,244 +256,278 @@ export const ChatInput = forwardRef<ChatInputRef, ChatInputProps>(
                onFileChange([...files, ...validFiles])
            }
        }
+    }

-        const handleUrlExtract = async (url: string) => {
-            if (!onUrlChange) return
-
-            setIsExtractingUrl(true)
-
-            try {
-                const existing = urlData
-                    ? new Map(urlData)
-                    : new Map<string, UrlData>()
-                existing.set(url, {
-                    url,
-                    title: url,
-                    content: "",
-                    charCount: 0,
-                    isExtracting: true,
-                })
-                onUrlChange(existing)
-
-                const data = await extractUrlContent(url)
-
-                const newUrlData = new Map(existing)
-                newUrlData.set(url, data)
-                onUrlChange(newUrlData)
-
-                setShowUrlDialog(false)
-            } catch (error) {
-                // Remove the URL from the data map on error
-                const newUrlData = urlData
-                    ? new Map(urlData)
-                    : new Map<string, UrlData>()
-                newUrlData.delete(url)
-                onUrlChange(newUrlData)
-                showErrorToast(
-                    <span className="text-muted-foreground">
-                        {error instanceof Error
-                            ? error.message
-                            : "Failed to extract URL content"}
-                    </span>,
-                )
-            } finally {
-                setIsExtractingUrl(false)
-            }
+    const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+        const newFiles = Array.from(e.target.files || [])
+        const { validFiles, errors } = validateFiles(
+            newFiles,
+            files.length,
+            dict,
+        )
+        showValidationErrors(errors, dict)
+        if (validFiles.length > 0) {
+            onFileChange([...files, ...validFiles])
        }

-        return (
-            <form
-                id="chat-form"
-                onSubmit={onSubmit}
-                className={`w-full transition-all duration-200 ${
-                    isDragging
-                        ? "ring-2 ring-primary ring-offset-2 rounded-2xl"
-                        : ""
-                }`}
-                onDragOver={handleDragOver}
-                onDragLeave={handleDragLeave}
-                onDrop={handleDrop}
-            >
-                {/* File & URL previews */}
-                {(files.length > 0 || (urlData && urlData.size > 0)) && (
-                    <div className="mb-3">
-                        <FilePreviewList
-                            files={files}
-                            onRemoveFile={handleRemoveFile}
-                            pdfData={pdfData}
-                            urlData={urlData}
-                            onRemoveUrl={
-                                onUrlChange
-                                    ? (url) => {
-                                          const next = new Map(urlData)
-                                          next.delete(url)
-                                          onUrlChange(next)
-                                      }
-                                    : undefined
-                            }
+        if (fileInputRef.current) {
+            fileInputRef.current.value = ""
+        }
+    }
+
+    const handleRemoveFile = (fileToRemove: File) => {
+        onFileChange(files.filter((file) => file !== fileToRemove))
+        if (fileInputRef.current) {
+            fileInputRef.current.value = ""
+        }
+    }
+
+    const triggerFileInput = () => {
+        fileInputRef.current?.click()
+    }
+
+    const handleDragOver = (e: React.DragEvent<HTMLFormElement>) => {
+        e.preventDefault()
+        e.stopPropagation()
+        setIsDragging(true)
+    }
+
+    const handleDragLeave = (e: React.DragEvent<HTMLFormElement>) => {
+        e.preventDefault()
+        e.stopPropagation()
+        setIsDragging(false)
+    }
+
+    const handleDrop = (e: React.DragEvent<HTMLFormElement>) => {
+        e.preventDefault()
+        e.stopPropagation()
+        setIsDragging(false)
+
+        if (isDisabled) return
+
+        const droppedFiles = e.dataTransfer.files
+        const supportedFiles = Array.from(droppedFiles).filter((file) =>
+            isValidFileType(file),
+        )
+
+        const { validFiles, errors } = validateFiles(
+            supportedFiles,
+            files.length,
+            dict,
+        )
+        showValidationErrors(errors, dict)
+        if (validFiles.length > 0) {
+            onFileChange([...files, ...validFiles])
+        }
+    }
+
+    const handleUrlExtract = async (url: string) => {
+        if (!onUrlChange) return
+
+        setIsExtractingUrl(true)
+
+        try {
+            const existing = urlData
+                ? new Map(urlData)
+                : new Map<string, UrlData>()
+            existing.set(url, {
+                url,
+                title: url,
+                content: "",
+                charCount: 0,
+                isExtracting: true,
+            })
+            onUrlChange(existing)
+
+            const data = await extractUrlContent(url)
+
+            const newUrlData = new Map(existing)
+            newUrlData.set(url, data)
+            onUrlChange(newUrlData)
+
+            setShowUrlDialog(false)
+        } catch (error) {
+            // Remove the URL from the data map on error
+            const newUrlData = urlData
+                ? new Map(urlData)
+                : new Map<string, UrlData>()
+            newUrlData.delete(url)
+            onUrlChange(newUrlData)
+            showErrorToast(
+                <span className="text-muted-foreground">
+                    {error instanceof Error
+                        ? error.message
+                        : "Failed to extract URL content"}
+                </span>,
+            )
+        } finally {
+            setIsExtractingUrl(false)
+        }
+    }
+
+    return (
+        <form
+            onSubmit={onSubmit}
+            className={`w-full transition-all duration-200 ${
+                isDragging
+                    ? "ring-2 ring-primary ring-offset-2 rounded-2xl"
+                    : ""
+            }`}
+            onDragOver={handleDragOver}
+            onDragLeave={handleDragLeave}
+            onDrop={handleDrop}
+        >
+            {/* File & URL previews */}
+            {(files.length > 0 || (urlData && urlData.size > 0)) && (
+                <div className="mb-3">
+                    <FilePreviewList
+                        files={files}
+                        onRemoveFile={handleRemoveFile}
+                        pdfData={pdfData}
+                        urlData={urlData}
+                        onRemoveUrl={
+                            onUrlChange
+                                ? (url) => {
+                                      const next = new Map(urlData)
+                                      next.delete(url)
+                                      onUrlChange(next)
+                                  }
+                                : undefined
+                        }
+                    />
+                </div>
+            )}
+            <div className="relative rounded-2xl border border-border bg-background shadow-sm focus-within:ring-2 focus-within:ring-primary/20 focus-within:border-primary/50 transition-all duration-200">
+                <Textarea
+                    ref={textareaRef}
+                    value={input}
+                    onChange={handleChange}
+                    onKeyDown={handleKeyDown}
+                    onPaste={handlePaste}
+                    placeholder={dict.chat.placeholder}
+                    disabled={isDisabled}
+                    aria-label="Chat input"
+                    className="min-h-[60px] max-h-[200px] resize-none border-0 bg-transparent px-4 py-3 text-sm focus-visible:ring-0 focus-visible:ring-offset-0 placeholder:text-muted-foreground/60 scrollbar-thin"
+                />
+
+                <div className="flex items-center justify-end gap-1 px-3 py-2 border-t border-border/50">
+                    <div className="flex items-center gap-1 overflow-x-hidden">
+                        <ButtonWithTooltip
+                            type="button"
+                            variant="ghost"
+                            size="sm"
+                            onClick={() => setShowHistory(true)}
+                            disabled={isDisabled || diagramHistory.length === 0}
+                            tooltipContent={dict.chat.diagramHistory}
+                            className="h-8 w-8 p-0 text-muted-foreground hover:text-foreground"
+                        >
+                            <History className="h-4 w-4" />
+                        </ButtonWithTooltip>
+
+                        <ButtonWithTooltip
+                            type="button"
+                            variant="ghost"
+                            size="sm"
+                            onClick={() => setShowSaveDialog(true)}
+                            disabled={isDisabled}
+                            tooltipContent={dict.chat.saveDiagram}
+                            className="h-8 w-8 p-0 text-muted-foreground hover:text-foreground"
+                        >
+                            <Download className="h-4 w-4" />
+                        </ButtonWithTooltip>
+
+                        <ButtonWithTooltip
+                            type="button"
+                            variant="ghost"
+                            size="sm"
+                            onClick={triggerFileInput}
+                            disabled={isDisabled}
+                            tooltipContent={dict.chat.uploadFile}
+                            className="h-8 w-8 p-0 text-muted-foreground hover:text-foreground"
+                        >
+                            <ImageIcon className="h-4 w-4" />
+                        </ButtonWithTooltip>
+
+                        {onUrlChange && (
+                            <ButtonWithTooltip
+                                type="button"
+                                variant="ghost"
+                                size="sm"
+                                onClick={() => setShowUrlDialog(true)}
+                                disabled={isDisabled}
+                                tooltipContent={dict.chat.ExtractURL}
+                                className="h-8 w-8 p-0 text-muted-foreground hover:text-foreground"
+                            >
+                                <Link className="h-4 w-4" />
+                            </ButtonWithTooltip>
+                        )}
+
+                        <input
+                            type="file"
+                            ref={fileInputRef}
+                            className="hidden"
+                            onChange={handleFileChange}
+                            accept="image/*,.pdf,application/pdf,text/*,.md,.markdown,.json,.csv,.xml,.yaml,.yml,.toml"
+                            multiple
+                            disabled={isDisabled}
                        />
                    </div>
-                )}
-                <div className="relative rounded-2xl border border-border bg-background shadow-sm focus-within:ring-2 focus-within:ring-primary/20 focus-within:border-primary/50 transition-all duration-200">
-                    <Textarea
-                        ref={textareaRef}
-                        value={input}
-                        onChange={handleChange}
-                        onKeyDown={handleKeyDown}
-                        onPaste={handlePaste}
-                        placeholder={dict.chat.placeholder}
+                    <ModelSelector
+                        models={models}
+                        selectedModelId={selectedModelId}
+                        onSelect={onModelSelect}
+                        onConfigure={onConfigureModels}
                        disabled={isDisabled}
-                        aria-label="Chat input"
-                        className="min-h-[60px] max-h-[200px] resize-none border-0 bg-transparent px-4 py-3 text-sm focus-visible:ring-0 focus-visible:ring-offset-0 placeholder:text-muted-foreground/60 scrollbar-thin"
+                        showUnvalidatedModels={showUnvalidatedModels}
                    />
-
-                    <div className="flex items-center justify-end gap-1 px-3 py-2 border-t border-border/50">
-                        <div className="flex items-center gap-1 overflow-x-hidden">
-                            <ButtonWithTooltip
-                                type="button"
-                                variant="ghost"
-                                size="sm"
-                                onClick={() => setShowHistory(true)}
-                                disabled={
-                                    isDisabled || diagramHistory.length === 0
-                                }
-                                tooltipContent={dict.chat.diagramHistory}
-                                className="h-8 w-8 p-0 text-muted-foreground hover:text-foreground"
-                            >
-                                <History className="h-4 w-4" />
-                            </ButtonWithTooltip>
-
-                            <ButtonWithTooltip
-                                type="button"
-                                variant="ghost"
-                                size="sm"
-                                onClick={() => setShowSaveDialog(true)}
-                                disabled={
-                                    isDisabled || !isRealDiagram(chartXML)
-                                }
-                                tooltipContent={dict.chat.saveDiagram}
-                                className="h-8 w-8 p-0 text-muted-foreground hover:text-foreground"
-                            >
-                                <Download className="h-4 w-4" />
-                            </ButtonWithTooltip>
-
-                            <ButtonWithTooltip
-                                type="button"
-                                variant="ghost"
-                                size="sm"
-                                onClick={triggerFileInput}
-                                disabled={isDisabled}
-                                tooltipContent={dict.chat.uploadFile}
-                                className="h-8 w-8 p-0 text-muted-foreground hover:text-foreground"
-                            >
-                                <ImageIcon className="h-4 w-4" />
-                            </ButtonWithTooltip>
-
-                            {onUrlChange && (
-                                <ButtonWithTooltip
-                                    type="button"
-                                    variant="ghost"
-                                    size="sm"
-                                    onClick={() => setShowUrlDialog(true)}
-                                    disabled={isDisabled}
-                                    tooltipContent={dict.chat.ExtractURL}
-                                    className="h-8 w-8 p-0 text-muted-foreground hover:text-foreground"
-                                >
-                                    <Link className="h-4 w-4" />
-                                </ButtonWithTooltip>
-                            )}
-
-                            <ButtonWithTooltip
-                                type="button"
-                                variant="ghost"
-                                size="sm"
-                                onClick={() => setShowSaveAsTemplate(true)}
-                                disabled={isDisabled || !input.trim()}
-                                tooltipContent={dict.templates.saveAsTemplate}
-                                className="h-8 w-8 p-0 text-muted-foreground hover:text-foreground"
-                            >
-                                <BookmarkPlus className="h-4 w-4" />
-                            </ButtonWithTooltip>
-
-                            <input
-                                type="file"
-                                ref={fileInputRef}
-                                className="hidden"
-                                onChange={handleFileChange}
-                                accept="image/*,.pdf,application/pdf,text/*,.md,.markdown,.json,.csv,.xml,.yaml,.yml,.toml"
-                                multiple
-                                disabled={isDisabled}
-                            />
-                        </div>
-                        <ModelSelector
-                            models={models}
-                            selectedModelId={selectedModelId}
-                            onSelect={onModelSelect}
-                            onConfigure={onConfigureModels}
-                            disabled={isDisabled}
-                            showUnvalidatedModels={showUnvalidatedModels}
-                        />
-                        <div className="w-px h-5 bg-border mx-1" />
-                        {(status === "streaming" || status === "submitted") &&
-                        onStop ? (
-                            <Button
-                                type="button"
-                                onClick={onStop}
-                                size="sm"
-                                variant="destructive"
-                                className="h-8 w-8 p-0 rounded-xl shadow-sm"
-                                aria-label={dict.chat.stopGeneration}
-                            >
-                                <Square className="h-4 w-4" />
-                            </Button>
+                    <div className="w-px h-5 bg-border mx-1" />
+                    <Button
+                        type="submit"
+                        disabled={isDisabled || !input.trim()}
+                        size="sm"
+                        className="h-8 px-4 rounded-xl font-medium shadow-sm"
+                        aria-label={
+                            isDisabled ? dict.chat.sending : dict.chat.send
+                        }
+                    >
+                        {isDisabled ? (
+                            <Loader2 className="h-4 w-4 animate-spin" />
                        ) : (
-                            <Button
-                                type="submit"
-                                disabled={isDisabled || !input.trim()}
-                                size="sm"
-                                className="h-8 px-4 rounded-xl font-medium shadow-sm"
-                                aria-label={dict.chat.send}
-                            >
+                            <>
                                <Send className="h-4 w-4 mr-1.5" />
                                {dict.chat.send}
-                            </Button>
+                            </>
                        )}
-                    </div>
+                    </Button>
                </div>
-                <HistoryDialog
-                    showHistory={showHistory}
-                    onToggleHistory={setShowHistory}
+            </div>
+            <HistoryDialog
+                showHistory={showHistory}
+                onToggleHistory={setShowHistory}
+            />
+            <SaveDialog
+                open={showSaveDialog}
+                onOpenChange={setShowSaveDialog}
+                onSave={(filename, format) =>
+                    saveDiagramToFile(
+                        filename,
+                        format,
+                        sessionId,
+                        dict.save.savedSuccessfully,
+                    )
+                }
+                defaultFilename={`diagram-${new Date()
+                    .toISOString()
+                    .slice(0, 10)}`}
+            />
+            {onUrlChange && (
+                <UrlInputDialog
+                    open={showUrlDialog}
+                    onOpenChange={setShowUrlDialog}
+                    onSubmit={handleUrlExtract}
+                    isExtracting={isExtractingUrl}
                />
-                <SaveDialog
-                    open={showSaveDialog}
-                    onOpenChange={setShowSaveDialog}
-                    onSave={(filename, format) =>
-                        saveDiagramToFile(
-                            filename,
-                            format,
-                            sessionId,
-                            dict.save.savedSuccessfully,
-                        )
-                    }
-                    defaultFilename={`diagram-${new Date()
-                        .toISOString()
-                        .slice(0, 10)}`}
-                />
-                {onUrlChange && (
-                    <UrlInputDialog
-                        open={showUrlDialog}
-                        onOpenChange={setShowUrlDialog}
-                        onSubmit={handleUrlExtract}
-                        isExtracting={isExtractingUrl}
-                    />
-                )}
-                <TemplateCreateDialog
-                    open={showSaveAsTemplate}
-                    onOpenChange={setShowSaveAsTemplate}
-                    onSuccess={() => setShowSaveAsTemplate(false)}
-                    initialPrompt={input.trim()}
-                />
-            </form>
-        )
-    },
-)
+            )}
+        </form>
+    )
+}
@@ -3,20 +3,19 @@
 import type { UIMessage } from "ai"

 import {
-    BookmarkPlus,
    Check,
    ChevronDown,
    ChevronUp,
    Copy,
    FileCode,
    FileText,
-    Link,
    Pencil,
    RotateCcw,
    ThumbsDown,
    ThumbsUp,
    X,
 } from "lucide-react"
+import Image from "next/image"
 import type { MutableRefObject } from "react"
 import { useCallback, useEffect, useRef, useState } from "react"
 import ReactMarkdown from "react-markdown"
@@ -27,12 +26,8 @@ import {
    ReasoningTrigger,
 } from "@/components/ai-elements/reasoning"
 import { ChatLobby } from "@/components/chat/ChatLobby"
-import { TemplateCreateDialog } from "@/components/chat/TemplateCreateDialog"
 import { ToolCallCard } from "@/components/chat/ToolCallCard"
 import type { DiagramOperation, ToolPartLike } from "@/components/chat/types"
-import type { ValidationState } from "@/components/chat/ValidationCard"
-import { ValidationCard } from "@/components/chat/ValidationCard"
-import Image from "@/components/image-with-basepath"
 import { ScrollArea } from "@/components/ui/scroll-area"
 import { useDictionary } from "@/hooks/use-dictionary"
 import { getApiEndpoint } from "@/lib/base-path"
@@ -62,20 +57,20 @@ function getCompleteOperations(

 import { useDiagram } from "@/contexts/diagram-context"

-// Helper to split text content into regular text and file/URL sections (PDF, text files, or URLs)
+// Helper to split text content into regular text and file sections (PDF or text files)
 interface TextSection {
-    type: "text" | "file" | "url"
+    type: "text" | "file"
    content: string
    filename?: string
    charCount?: number
-    fileType?: "pdf" | "text" | "url"
+    fileType?: "pdf" | "text"
 }

 function splitTextIntoFileSections(text: string): TextSection[] {
    const sections: TextSection[] = []
-    // Match [PDF: filename], [File: filename], or [URL: url] patterns
+    // Match [PDF: filename] or [File: filename] patterns
    const filePattern =
-        /\[(PDF|File|URL):\s*([^\]]+)\]\n([\s\S]*?)(?=\n\n\[(PDF|File|URL):|$)/g
+        /\[(PDF|File):\s*([^\]]+)\]\n([\s\S]*?)(?=\n\n\[(PDF|File):|$)/g
    let lastIndex = 0
    let match

@@ -86,34 +81,28 @@ function splitTextIntoFileSections(text: string): TextSection[] {
            sections.push({ type: "text", content: beforeText })
        }

-        // Add file/url section
-        const sectionType = match[1].toLowerCase()
-        const fileType =
-            sectionType === "pdf"
-                ? "pdf"
-                : sectionType === "url"
-                  ? "url"
-                  : "text"
+        // Add file section
+        const fileType = match[1].toLowerCase() === "pdf" ? "pdf" : "text"
        const filename = match[2].trim()
-        const content = match[3].trim()
+        const fileContent = match[3].trim()
        sections.push({
-            type: sectionType === "url" ? "url" : "file",
-            content: content,
+            type: "file",
+            content: fileContent,
            filename,
-            charCount: content.length,
+            charCount: fileContent.length,
            fileType,
        })

        lastIndex = match.index + match[0].length
    }

-    // Add remaining text after last section
+    // Add remaining text after last file section
    const remainingText = text.slice(lastIndex).trim()
    if (remainingText) {
        sections.push({ type: "text", content: remainingText })
    }

-    // If no file/url sections found, return original text
+    // If no file sections found, return original text
    if (sections.length === 0) {
        sections.push({ type: "text", content: text })
    }
@@ -132,8 +121,8 @@ const getMessageTextContent = (message: UIMessage): string => {
 // Get only the user's original text, excluding appended file content
 const getUserOriginalText = (message: UIMessage): string => {
    const fullText = getMessageTextContent(message)
-    // Strip out [PDF: ...], [File: ...], and [URL: ...] sections that were appended
-    const filePattern = /\n\n\[(PDF|File|URL):\s*[^\]]+\]\n[\s\S]*$/
+    // Strip out [PDF: ...] and [File: ...] sections that were appended
+    const filePattern = /\n\n\[(PDF|File):\s*[^\]]+\]\n[\s\S]*$/
    return fullText.replace(filePattern, "").trim()
 }

@@ -159,12 +148,6 @@ interface ChatMessageDisplayProps {
    onSelectSession?: (id: string) => void
    onDeleteSession?: (id: string) => void
    loadedMessageIdsRef?: MutableRefObject<Set<string>>
-    validationStates?: Record<string, ValidationState>
-    onImproveWithSuggestions?: (feedback: string) => void
-    onSendTemplate?: (
-        template: import("@/lib/template-storage").Template,
-    ) => void
-    currentInput?: string
 }

 export function ChatMessageDisplay({
@@ -182,10 +165,6 @@ export function ChatMessageDisplay({
    onSelectSession,
    onDeleteSession,
    loadedMessageIdsRef,
-    validationStates = {},
-    onImproveWithSuggestions,
-    onSendTemplate,
-    currentInput = "",
 }: ChatMessageDisplayProps) {
    const dict = useDictionary()
    const { chartXML, loadDiagram: onDisplayChart } = useDiagram()
@@ -245,10 +224,6 @@ export function ChatMessageDisplay({
    const [expandedPdfSections, setExpandedPdfSections] = useState<
        Record<string, boolean>
    >({})
-    // Track "Save as Template" dialog
-    const [saveAsTemplateMessageId, setSaveAsTemplateMessageId] = useState<
-        string | null
-    >(null)

    const setCopyState = (
        messageId: string,
@@ -417,7 +392,6 @@ export function ChatMessageDisplay({

    // Track previous message count to detect bulk loads vs streaming
    const prevMessageCountRef = useRef(0)
-    const scrollThrottleRef = useRef<ReturnType<typeof setTimeout> | null>(null)

    useEffect(() => {
        if (messagesEndRef.current && messages.length > 0) {
@@ -431,17 +405,8 @@ export function ChatMessageDisplay({
                return
            }

-            // Throttle scroll during streaming to avoid layout thrashing
-            // Leading + trailing: scroll immediately, then once more after cooldown
-            if (!scrollThrottleRef.current) {
-                messagesEndRef.current.scrollIntoView({ behavior: "smooth" })
-                scrollThrottleRef.current = setTimeout(() => {
-                    scrollThrottleRef.current = null
-                    messagesEndRef.current?.scrollIntoView({
-                        behavior: "smooth",
-                    })
-                }, 150)
-            }
+            // Single message added - smooth scroll
+            messagesEndRef.current.scrollIntoView({ behavior: "smooth" })
        }
    }, [messages])

@@ -464,15 +429,11 @@ export function ChatMessageDisplay({
                        const toolPart = part as ToolPartLike
                        const { toolCallId, state, input } = toolPart

-                        // Auto-collapse on completion, but only if user hasn't manually toggled
                        if (state === "output-available") {
-                            setExpandedTools((prev) => {
-                                // Only auto-collapse if not already set (user hasn't interacted)
-                                if (prev[toolCallId] === undefined) {
-                                    return { ...prev, [toolCallId]: false }
-                                }
-                                return prev
-                            })
+                            setExpandedTools((prev) => ({
+                                ...prev,
+                                [toolCallId]: false,
+                            }))
                        }

                        if (
@@ -672,8 +633,6 @@ export function ChatMessageDisplay({
                    onDeleteSession={onDeleteSession}
                    setInput={setInput}
                    setFiles={setFiles}
-                    onSendTemplate={onSendTemplate}
-                    currentInput={currentInput}
                    dict={dict}
                />
            ) : messages.length === 0 ? null : (
@@ -771,42 +730,8 @@ export function ChatMessageDisplay({
                                                    <Copy className="h-3.5 w-3.5" />
                                                )}
                                            </button>
-                                            {/* Save as Template button - only for user messages */}
-                                            <button
-                                                type="button"
-                                                onClick={() =>
-                                                    setSaveAsTemplateMessageId(
-                                                        message.id,
-                                                    )
-                                                }
-                                                className="p-1.5 rounded-lg text-muted-foreground/60 hover:text-muted-foreground hover:bg-muted transition-colors"
-                                                title={
-                                                    dict.templates
-                                                        ?.saveAsTemplate ||
-                                                    "Save as Template"
-                                                }
-                                            >
-                                                <BookmarkPlus className="h-3.5 w-3.5" />
-                                            </button>
                                        </div>
                                    )}
-
-                                {/* Save as Template Dialog */}
-                                {saveAsTemplateMessageId === message.id && (
-                                    <TemplateCreateDialog
-                                        open={true}
-                                        onOpenChange={(open) => {
-                                            if (!open)
-                                                setSaveAsTemplateMessageId(null)
-                                        }}
-                                        onSuccess={() => {
-                                            setSaveAsTemplateMessageId(null)
-                                        }}
-                                        initialPrompt={getUserOriginalText(
-                                            message,
-                                        )}
-                                    />
-                                )}
                                <div className="max-w-[85%] min-w-0">
                                    {/* Reasoning blocks - displayed first for assistant messages */}
                                    {message.role === "assistant" &&
@@ -986,56 +911,30 @@ export function ChatMessageDisplay({
                                            return groups.map(
                                                (group, groupIndex) => {
                                                    if (group.type === "tool") {
-                                                        const toolPart = group
-                                                            .parts[0] as ToolPartLike
-                                                        const toolCallId =
-                                                            toolPart.toolCallId
-                                                        const isDisplayDiagram =
-                                                            toolPart.type ===
-                                                            "tool-display_diagram"
-                                                        const validationState =
-                                                            validationStates[
-                                                                toolCallId
-                                                            ]
-
                                                        return (
-                                                            <div
+                                                            <ToolCallCard
                                                                key={`${message.id}-tool-${group.startIndex}`}
-                                                            >
-                                                                <ToolCallCard
-                                                                    part={
-                                                                        toolPart
-                                                                    }
-                                                                    expandedTools={
-                                                                        expandedTools
-                                                                    }
-                                                                    setExpandedTools={
-                                                                        setExpandedTools
-                                                                    }
-                                                                    onCopy={
-                                                                        copyMessageToClipboard
-                                                                    }
-                                                                    copiedToolCallId={
-                                                                        copiedToolCallId
-                                                                    }
-                                                                    copyFailedToolCallId={
-                                                                        copyFailedToolCallId
-                                                                    }
-                                                                    dict={dict}
-                                                                />
-                                                                {/* Show validation card for display_diagram tools */}
-                                                                {isDisplayDiagram &&
-                                                                    validationState && (
-                                                                        <ValidationCard
-                                                                            state={
-                                                                                validationState
-                                                                            }
-                                                                            onImproveWithSuggestions={
-                                                                                onImproveWithSuggestions
-                                                                            }
-                                                                        />
-                                                                    )}
-                                                            </div>
+                                                                part={
+                                                                    group
+                                                                        .parts[0] as ToolPartLike
+                                                                }
+                                                                expandedTools={
+                                                                    expandedTools
+                                                                }
+                                                                setExpandedTools={
+                                                                    setExpandedTools
+                                                                }
+                                                                onCopy={
+                                                                    copyMessageToClipboard
+                                                                }
+                                                                copiedToolCallId={
+                                                                    copiedToolCallId
+                                                                }
+                                                                copyFailedToolCallId={
+                                                                    copyFailedToolCallId
+                                                                }
+                                                                dict={dict}
+                                                            />
                                                        )
                                                    }

@@ -1149,14 +1048,12 @@ export function ChatMessageDisplay({
                                                                                    ) => {
                                                                                        if (
                                                                                            section.type ===
-                                                                                                "file" ||
-                                                                                            section.type ===
-                                                                                                "url"
+                                                                                            "file"
                                                                                        ) {
-                                                                                            const sectionKey = `${message.id}-${section.type}-${partIndex}-${sectionIndex}`
+                                                                                            const pdfKey = `${message.id}-file-${partIndex}-${sectionIndex}`
                                                                                            const isExpanded =
                                                                                                expandedPdfSections[
-                                                                                                    sectionKey
+                                                                                                    pdfKey
                                                                                                ] ??
                                                                                                false
                                                                                            const charDisplay =
@@ -1165,27 +1062,10 @@ export function ChatMessageDisplay({
                                                                                                    1000
                                                                                                    ? `${(section.charCount / 1000).toFixed(1)}k`
                                                                                                    : section.charCount
-
-                                                                                            // Icon selector
-                                                                                            const Icon =
-                                                                                                section.fileType ===
-                                                                                                "pdf"
-                                                                                                    ? FileText
-                                                                                                    : section.fileType ===
-                                                                                                        "url"
-                                                                                                      ? Link
-                                                                                                      : FileCode
-
-                                                                                            const iconColor =
-                                                                                                section.fileType ===
-                                                                                                "pdf"
-                                                                                                    ? "text-red-500"
-                                                                                                    : "text-blue-700"
-
                                                                                            return (
                                                                                                <div
                                                                                                    key={
-                                                                                                        sectionKey
+                                                                                                        pdfKey
                                                                                                    }
                                                                                                    className="rounded-lg border border-border/60 bg-muted/30 overflow-hidden"
                                                                                                >
@@ -1200,7 +1080,7 @@ export function ChatMessageDisplay({
                                                                                                                    prev,
                                                                                                                ) => ({
                                                                                                                    ...prev,
-                                                                                                                    [sectionKey]:
+                                                                                                                    [pdfKey]:
                                                                                                                        !isExpanded,
                                                                                                                }),
                                                                                                            )
@@ -1208,10 +1088,13 @@ export function ChatMessageDisplay({
                                                                                                        className="w-full flex items-center justify-between px-3 py-2 hover:bg-muted/50 transition-colors"
                                                                                                    >
                                                                                                        <div className="flex items-center gap-2">
-                                                                                                            <Icon
-                                                                                                                className={`h-4 w-4 ${iconColor}`}
-                                                                                                            />
-                                                                                                            <span className="text-xs font-medium truncate max-w-[200px]">
+                                                                                                            {section.fileType ===
+                                                                                                            "pdf" ? (
+                                                                                                                <FileText className="h-4 w-4 text-red-500" />
+                                                                                                            ) : (
+                                                                                                                <FileCode className="h-4 w-4 text-blue-500" />
+                                                                                                            )}
+                                                                                                            <span className="text-xs font-medium">
                                                                                                                {
                                                                                                                    section.filename
                                                                                                                }
@@ -8,7 +8,8 @@ import {
    PanelRightOpen,
    Settings,
 } from "lucide-react"
-import { usePathname, useRouter, useSearchParams } from "next/navigation"
+import Image from "next/image"
+import { useRouter, useSearchParams } from "next/navigation"
 import type React from "react"
 import {
    useCallback,
@@ -21,7 +22,6 @@ import { flushSync } from "react-dom"
 import { Toaster, toast } from "sonner"
 import { ButtonWithTooltip } from "@/components/button-with-tooltip"
 import { ChatInput } from "@/components/chat-input"
-import Image from "@/components/image-with-basepath"
 import { ModelConfigDialog } from "@/components/model-config-dialog"
 import { SettingsDialog } from "@/components/settings-dialog"
 import { useDiagram } from "@/contexts/diagram-context"
@@ -29,19 +29,15 @@ import { useDiagramToolHandlers } from "@/hooks/use-diagram-tool-handlers"
 import { useDictionary } from "@/hooks/use-dictionary"
 import { getSelectedAIConfig, useModelConfig } from "@/hooks/use-model-config"
 import { useSessionManager } from "@/hooks/use-session-manager"
-import { useValidateDiagram } from "@/hooks/use-validate-diagram"
 import { getApiEndpoint } from "@/lib/base-path"
 import { findCachedResponse } from "@/lib/cached-responses"
-import type { DrawioTheme } from "@/lib/drawio-themes"
 import { formatMessage } from "@/lib/i18n/utils"
 import { isPdfFile, isTextFile } from "@/lib/pdf-utils"
 import { sanitizeMessages } from "@/lib/session-storage"
-import { STORAGE_KEYS } from "@/lib/storage"
 import type { UrlData } from "@/lib/url-utils"
 import { type FileData, useFileProcessor } from "@/lib/use-file-processor"
 import { useQuotaManager } from "@/lib/use-quota-manager"
 import { cn, formatXML, isRealDiagram } from "@/lib/utils"
-import type { ValidationState } from "./chat/ValidationCard"
 import { ChatMessageDisplay } from "./chat-message-display"
 import { DevXmlSimulator } from "./dev-xml-simulator"

@@ -69,18 +65,18 @@ interface ChatMessage {
 interface ChatPanelProps {
    isVisible: boolean
    onToggleVisibility: () => void
-    drawioUi: DrawioTheme
-    onDrawioUiChange: (theme: DrawioTheme) => void
+    drawioUi: "min" | "sketch"
+    onToggleDrawioUi: () => void
    darkMode: boolean
    onToggleDarkMode: () => void
    isMobile?: boolean
+    onCloseProtectionChange?: (enabled: boolean) => void
 }

 // Constants for tool states
 const TOOL_ERROR_STATE = "output-error" as const
 const DEBUG = process.env.NODE_ENV === "development"
-// Increased to 3 to support VLM validation retries (matches MAX_VALIDATION_RETRIES)
-const MAX_AUTO_RETRY_COUNT = 3
+const MAX_AUTO_RETRY_COUNT = 1

 const MAX_CONTINUATION_RETRY_COUNT = 2 // Limit for truncation continuation retries

@@ -111,10 +107,11 @@ export default function ChatPanel({
    isVisible,
    onToggleVisibility,
    drawioUi,
-    onDrawioUiChange,
+    onToggleDrawioUi,
    darkMode,
    onToggleDarkMode,
    isMobile = false,
+    onCloseProtectionChange,
 }: ChatPanelProps) {
    const {
        loadDiagram: onDisplayChart,
@@ -125,36 +122,38 @@ export default function ChatPanel({
        latestSvg,
        clearDiagram,
        getThumbnailSvg,
-        captureValidationPng,
        diagramHistory,
        setDiagramHistory,
    } = useDiagram()

    const dict = useDictionary()
    const router = useRouter()
-    const pathname = usePathname()
    const searchParams = useSearchParams()
    const urlSessionId = searchParams.get("session")

    const onFetchChart = (saveToHistory = true) => {
        return Promise.race([
            new Promise<string>((resolve) => {
-                resolverRef.current = resolve
+                if (resolverRef && "current" in resolverRef) {
+                    resolverRef.current = resolve
+                }
                if (saveToHistory) {
                    onExport()
                } else {
                    handleExportWithoutHistory()
                }
            }),
-            new Promise<string>((_, reject) => {
-                const currentResolver = resolverRef.current
-                setTimeout(() => {
-                    if (resolverRef.current === currentResolver) {
-                        resolverRef.current = null
-                    }
-                    reject(new Error("Chart export timed out after 10 seconds"))
-                }, 10000)
-            }),
+            new Promise<string>((_, reject) =>
+                setTimeout(
+                    () =>
+                        reject(
+                            new Error(
+                                "Chart export timed out after 10 seconds",
+                            ),
+                        ),
+                    10000,
+                ),
+            ),
        ])
    }

@@ -176,9 +175,6 @@ export default function ChatPanel({
    const [dailyTokenLimit, setDailyTokenLimit] = useState(0)
    const [tpmLimit, setTpmLimit] = useState(0)
    const [minimalStyle, setMinimalStyle] = useState(false)
-    const [vlmValidationEnabled, setVlmValidationEnabled] = useState(false)
-    const [customSystemMessage, setCustomSystemMessage] = useState("")
-    const [shouldFocusInput, setShouldFocusInput] = useState(false)

    // Restore input from sessionStorage on mount (when ChatPanel remounts due to key change)
    useEffect(() => {
@@ -188,22 +184,6 @@ export default function ChatPanel({
        }
    }, [])

-    // Load VLM validation setting from localStorage on mount
-    useEffect(() => {
-        const stored = localStorage.getItem(STORAGE_KEYS.vlmValidationEnabled)
-        if (stored !== null) {
-            setVlmValidationEnabled(stored === "true")
-        }
-    }, [])
-
-    // Load custom system message from localStorage on mount
-    useEffect(() => {
-        const stored = localStorage.getItem(STORAGE_KEYS.customSystemMessage)
-        if (stored !== null) {
-            setCustomSystemMessage(stored)
-        }
-    }, [])
-
    // Check config on mount
    useEffect(() => {
        fetch(getApiEndpoint("/api/config"))
@@ -291,53 +271,7 @@ export default function ChatPanel({
    > | null>(null)
    const LOCAL_STORAGE_DEBOUNCE_MS = 1000 // Save at most once per second

-    // Validation state for displaying VLM validation progress
-    // Key: toolCallId, Value: ValidationState
-    const [validationStates, setValidationStates] = useState<
-        Record<string, ValidationState>
-    >({})
-
-    // Callback to update validation state from tool handler
-    const handleValidationStateChange = useCallback(
-        (toolCallId: string, state: ValidationState) => {
-            setValidationStates((prev) => ({
-                ...prev,
-                [toolCallId]: state,
-            }))
-        },
-        [],
-    )
-
-    // Handler for VLM validation setting change
-    const handleVlmValidationChange = useCallback((value: boolean) => {
-        setVlmValidationEnabled(value)
-        localStorage.setItem(STORAGE_KEYS.vlmValidationEnabled, String(value))
-    }, [])
-
-    // Handler for custom system message change
-    const handleCustomSystemMessageChange = useCallback((value: string) => {
-        setCustomSystemMessage(value)
-        localStorage.setItem(STORAGE_KEYS.customSystemMessage, value)
-    }, [])
-
-    // Ref to store the sendMessage function for use in callbacks
-    const sendMessageRef = useRef<typeof sendMessage | null>(null)
-
-    // Callback to improve diagram with validation suggestions
-    const handleImproveWithSuggestions = useCallback((feedback: string) => {
-        if (sendMessageRef.current) {
-            // Send the feedback as a new user message to trigger regeneration
-            sendMessageRef.current({
-                role: "user",
-                parts: [{ type: "text", text: feedback }],
-            })
-        }
-    }, [])
-
-    // VLM validation hook using AI SDK's useObject
-    const { validateWithFallback } = useValidateDiagram()
-
-    // Diagram tool handlers (edit_diagram, restructure_diagram, cached replay)
+    // Diagram tool handlers (display_diagram, edit_diagram, append_diagram)
    const { handleToolCall } = useDiagramToolHandlers({
        partialXmlRef,
        editDiagramOriginalXmlRef,
@@ -345,167 +279,153 @@ export default function ChatPanel({
        onDisplayChart,
        onFetchChart,
        onExport,
-        captureValidationPng,
-        validateDiagram: validateWithFallback,
-        enableVlmValidation: vlmValidationEnabled,
-        sessionId,
-        onValidationStateChange: handleValidationStateChange,
    })

-    const {
-        messages,
-        sendMessage,
-        addToolOutput,
-        status,
-        error,
-        setMessages,
-        stop,
-    } = useChat({
-        transport: new DefaultChatTransport({
-            api: getApiEndpoint("/api/chat"),
-        }),
-        onToolCall: async ({ toolCall }) => {
-            await handleToolCall({ toolCall }, addToolOutput)
-        },
-        onError: (error) => {
-            // Handle server-side quota limit (429 response)
-            // AI SDK puts the full response body in error.message for non-OK responses
-            try {
-                const data = JSON.parse(error.message)
-                if (data.type === "request") {
-                    quotaManager.showQuotaLimitToast(data.used, data.limit)
+    const { messages, sendMessage, addToolOutput, status, error, setMessages } =
+        useChat({
+            transport: new DefaultChatTransport({
+                api: getApiEndpoint("/api/chat"),
+            }),
+            onToolCall: async ({ toolCall }) => {
+                await handleToolCall({ toolCall }, addToolOutput)
+            },
+            onError: (error) => {
+                // Handle server-side quota limit (429 response)
+                // AI SDK puts the full response body in error.message for non-OK responses
+                try {
+                    const data = JSON.parse(error.message)
+                    if (data.type === "request") {
+                        quotaManager.showQuotaLimitToast(data.used, data.limit)
+                        return
+                    }
+                    if (data.type === "token") {
+                        quotaManager.showTokenLimitToast(data.used, data.limit)
+                        return
+                    }
+                    if (data.type === "tpm") {
+                        quotaManager.showTPMLimitToast(data.limit)
+                        return
+                    }
+                } catch {
+                    // Not JSON, fall through to string matching for backwards compatibility
+                }
+
+                // Fallback to string matching
+                if (error.message.includes("Daily request limit")) {
+                    quotaManager.showQuotaLimitToast()
                    return
                }
-                if (data.type === "token") {
-                    quotaManager.showTokenLimitToast(data.used, data.limit)
+                if (error.message.includes("Daily token limit")) {
+                    quotaManager.showTokenLimitToast()
                    return
                }
-                if (data.type === "tpm") {
-                    quotaManager.showTPMLimitToast(data.limit)
-                    return
-                }
-            } catch {
-                // Not JSON, fall through to string matching for backwards compatibility
-            }
-
-            // Fallback to string matching
-            if (error.message.includes("Daily request limit")) {
-                quotaManager.showQuotaLimitToast()
-                return
-            }
-            if (error.message.includes("Daily token limit")) {
-                quotaManager.showTokenLimitToast()
-                return
-            }
-            if (
-                error.message.includes("Rate limit exceeded") ||
-                error.message.includes("tokens per minute")
-            ) {
-                quotaManager.showTPMLimitToast()
-                return
-            }
-
-            // Silence access code error in console since it's handled by UI
-            if (!error.message.includes("Invalid or missing access code")) {
-                console.error("Chat error:", error)
-            }
-
-            // Translate technical errors into user-friendly messages
-            // The server now handles detailed error messages, so we can display them directly.
-            // But we still handle connection/network errors that happen before reaching the server.
-            let friendlyMessage = error.message
-
-            // Simple check for network errors if message is generic
-            if (friendlyMessage === "Failed to fetch") {
-                friendlyMessage = "Network error. Please check your connection."
-            }
-
-            // Truncated tool input error (model output limit too low)
-            if (friendlyMessage.includes("toolUse.input is invalid")) {
-                friendlyMessage =
-                    "Output was truncated before the diagram could be generated. Try a simpler request or increase the maxOutputLength."
-            }
-
-            // Translate image not supported error
-            if (
-                friendlyMessage.includes("image content block") ||
-                friendlyMessage.toLowerCase().includes("image_url")
-            ) {
-                friendlyMessage = "This model doesn't support image input."
-            }
-
-            // Add system message for error so it can be cleared
-            setMessages((currentMessages) => {
-                const errorMessage = {
-                    id: `error-${Date.now()}`,
-                    role: "system" as const,
-                    content: friendlyMessage,
-                    parts: [{ type: "text" as const, text: friendlyMessage }],
-                }
-                return [...currentMessages, errorMessage]
-            })
-
-            if (error.message.includes("Invalid or missing access code")) {
-                // Show settings dialog to help user fix it
-                setShowSettingsDialog(true)
-            }
-        },
-        onFinish: () => {},
-        sendAutomaticallyWhen: ({ messages }) => {
-            const isInContinuationMode = partialXmlRef.current.length > 0
-
-            const shouldRetry = hasToolErrors(
-                messages as unknown as ChatMessage[],
-            )
-
-            if (!shouldRetry) {
-                // No error, reset retry count and clear state
-                autoRetryCountRef.current = 0
-                continuationRetryCountRef.current = 0
-                partialXmlRef.current = ""
-                return false
-            }
-
-            // Continuation mode: limited retries for truncation handling
-            if (isInContinuationMode) {
                if (
-                    continuationRetryCountRef.current >=
-                    MAX_CONTINUATION_RETRY_COUNT
+                    error.message.includes("Rate limit exceeded") ||
+                    error.message.includes("tokens per minute")
                ) {
-                    toast.error(
-                        formatMessage(dict.errors.continuationRetryLimit, {
-                            max: MAX_CONTINUATION_RETRY_COUNT,
-                        }),
-                    )
+                    quotaManager.showTPMLimitToast()
+                    return
+                }
+
+                // Silence access code error in console since it's handled by UI
+                if (!error.message.includes("Invalid or missing access code")) {
+                    console.error("Chat error:", error)
+                }
+
+                // Translate technical errors into user-friendly messages
+                // The server now handles detailed error messages, so we can display them directly.
+                // But we still handle connection/network errors that happen before reaching the server.
+                let friendlyMessage = error.message
+
+                // Simple check for network errors if message is generic
+                if (friendlyMessage === "Failed to fetch") {
+                    friendlyMessage =
+                        "Network error. Please check your connection."
+                }
+
+                // Truncated tool input error (model output limit too low)
+                if (friendlyMessage.includes("toolUse.input is invalid")) {
+                    friendlyMessage =
+                        "Output was truncated before the diagram could be generated. Try a simpler request or increase the maxOutputLength."
+                }
+
+                // Translate image not supported error
+                if (
+                    friendlyMessage.includes("image content block") ||
+                    friendlyMessage.toLowerCase().includes("image_url")
+                ) {
+                    friendlyMessage = "This model doesn't support image input."
+                }
+
+                // Add system message for error so it can be cleared
+                setMessages((currentMessages) => {
+                    const errorMessage = {
+                        id: `error-${Date.now()}`,
+                        role: "system" as const,
+                        content: friendlyMessage,
+                        parts: [
+                            { type: "text" as const, text: friendlyMessage },
+                        ],
+                    }
+                    return [...currentMessages, errorMessage]
+                })
+
+                if (error.message.includes("Invalid or missing access code")) {
+                    // Show settings dialog to help user fix it
+                    setShowSettingsDialog(true)
+                }
+            },
+            onFinish: () => {},
+            sendAutomaticallyWhen: ({ messages }) => {
+                const isInContinuationMode = partialXmlRef.current.length > 0
+
+                const shouldRetry = hasToolErrors(
+                    messages as unknown as ChatMessage[],
+                )
+
+                if (!shouldRetry) {
+                    // No error, reset retry count and clear state
+                    autoRetryCountRef.current = 0
                    continuationRetryCountRef.current = 0
                    partialXmlRef.current = ""
                    return false
                }
-                continuationRetryCountRef.current++
-            } else {
-                // Regular error: check retry count limit
-                if (autoRetryCountRef.current >= MAX_AUTO_RETRY_COUNT) {
-                    toast.error(
-                        formatMessage(dict.errors.retryLimit, {
-                            max: MAX_AUTO_RETRY_COUNT,
-                        }),
-                    )
-                    autoRetryCountRef.current = 0
-                    partialXmlRef.current = ""
-                    return false
+
+                // Continuation mode: limited retries for truncation handling
+                if (isInContinuationMode) {
+                    if (
+                        continuationRetryCountRef.current >=
+                        MAX_CONTINUATION_RETRY_COUNT
+                    ) {
+                        toast.error(
+                            formatMessage(dict.errors.continuationRetryLimit, {
+                                max: MAX_CONTINUATION_RETRY_COUNT,
+                            }),
+                        )
+                        continuationRetryCountRef.current = 0
+                        partialXmlRef.current = ""
+                        return false
+                    }
+                    continuationRetryCountRef.current++
+                } else {
+                    // Regular error: check retry count limit
+                    if (autoRetryCountRef.current >= MAX_AUTO_RETRY_COUNT) {
+                        toast.error(
+                            formatMessage(dict.errors.retryLimit, {
+                                max: MAX_AUTO_RETRY_COUNT,
+                            }),
+                        )
+                        autoRetryCountRef.current = 0
+                        partialXmlRef.current = ""
+                        return false
+                    }
+                    // Increment retry count for actual errors
+                    autoRetryCountRef.current++
                }
-                // Increment retry count for actual errors
-                autoRetryCountRef.current++
-            }

-            return true
-        },
-    })
-
-    // Store sendMessage in ref for use in callbacks (like handleImproveWithSuggestions)
-    useEffect(() => {
-        sendMessageRef.current = sendMessage
-    }, [sendMessage])
+                return true
+            },
+        })

    // Ref to track latest messages for unload persistence
    const messagesRef = useRef(messages)
@@ -602,7 +522,7 @@ export default function ChatPanel({

        try {
            const currentSession = sessionManager.currentSession
-            if (currentSession) {
+            if (currentSession && currentSession.messages.length > 0) {
                // Restore from session manager (IndexedDB)
                justLoadedSessionRef.current = true
                syncUIWithSession(currentSession)
@@ -639,7 +559,7 @@ export default function ChatPanel({
        lastSyncedSessionIdRef.current = newSessionId

        // Sync UI with new session
-        if (newSession) {
+        if (newSession && newSession.messages.length > 0) {
            justLoadedSessionRef.current = true
            syncUIWithSession(newSession)
        } else if (!newSession) {
@@ -694,7 +614,7 @@ export default function ChatPanel({
        // Debounce: save after 1 second of no changes
        localStorageDebounceRef.current = setTimeout(async () => {
            try {
-                if (messages.length > 0 || hasDiagramNow) {
+                if (messages.length > 0) {
                    const sessionData = await buildSessionData({
                        // Only capture thumbnail if there was a diagram AND this isn't a no-diagram session
                        withThumbnail: hasDiagramNow && !isNodiagramSession,
@@ -716,7 +636,6 @@ export default function ChatPanel({
            }
        }
    }, [
-        chartXML,
        messages,
        status,
        sessionIsAvailable,
@@ -747,8 +666,7 @@ export default function ChatPanel({
        const handleVisibilityChange = async () => {
            if (
                document.visibilityState === "hidden" &&
-                (messagesRef.current.length > 0 ||
-                    isRealDiagram(chartXMLRef.current))
+                messagesRef.current.length > 0
            ) {
                try {
                    // Attempt to save session - browser may not wait for completion
@@ -830,6 +748,10 @@ export default function ChatPanel({
                let chartXml = await onFetchChart()
                chartXml = formatXML(chartXml)

+                // Update ref directly to avoid race condition with React's async state update
+                // This ensures edit_diagram has the correct XML before AI responds
+                chartXMLRef.current = chartXml
+
                // Build user text by concatenating input with pre-extracted text
                // (Backend only reads first text part, so we must combine them)
                const parts: any[] = []
@@ -899,7 +821,6 @@ export default function ChatPanel({
                } else {
                    justLoadedSessionIdRef.current = null
                }
-                setValidationStates({}) // Clear validation states when switching sessions
                syncUIWithSession(sessionData)
                router.replace(`?session=${sessionId}`, { scroll: false })
            }
@@ -916,10 +837,10 @@ export default function ChatPanel({
            if (result.wasCurrentSession) {
                // Deleted current session - clear UI and URL
                syncUIWithSession(null)
-                router.replace(pathname, { scroll: false })
+                router.replace(window.location.pathname, { scroll: false })
            }
        },
-        [sessionManager, syncUIWithSession, router, pathname],
+        [sessionManager, syncUIWithSession, router],
    )

    const handleNewChat = useCallback(async () => {
@@ -937,10 +858,8 @@ export default function ChatPanel({

        // Clear UI state (can't use syncUIWithSession here because we also need to clear files)
        setMessages([])
-        setInput("")
        clearDiagram()
        setDiagramHistory([])
-        setValidationStates({}) // Clear validation states to prevent memory leak
        handleFileChange([]) // Use handleFileChange to also clear pdfData
        setUrlData(new Map())
        const newSessionId = `session-${Date.now()}-${Math.random()
@@ -952,10 +871,7 @@ export default function ChatPanel({
        toast.success(dict.dialogs.clearSuccess)

        // Clear URL param to show blank state
-        router.replace(pathname, { scroll: false })
-
-        // After starting a fresh chat, move focus back to the chat input
-        setShouldFocusInput(true)
+        router.replace(window.location.pathname, { scroll: false })
    }, [
        clearDiagram,
        handleFileChange,
@@ -967,28 +883,8 @@ export default function ChatPanel({
        dict.dialogs.clearSuccess,
        buildSessionData,
        setDiagramHistory,
-        pathname,
    ])

-    // Handle sending a template directly (called from TemplatePanel)
-    const handleSendTemplate = useCallback(
-        async (template: { prompt: string }) => {
-            flushSync(() => {
-                setInput(template.prompt)
-                setFiles([])
-                setUrlData(new Map())
-            })
-
-            const formElement = document.getElementById(
-                "chat-form",
-            ) as HTMLFormElement | null
-            if (formElement) {
-                formElement.requestSubmit()
-            }
-        },
-        [setInput, setFiles, setUrlData],
-    )
-
    const handleInputChange = (
        e: React.ChangeEvent<HTMLInputElement | HTMLTextAreaElement>,
    ) => {
@@ -1026,29 +922,6 @@ export default function ChatPanel({
        }
    }

-    // Handle stop button click
-    const handleStop = useCallback(() => {
-        const lastMessage = messages[messages.length - 1]
-        const toolParts = lastMessage?.parts?.filter(
-            (part: any) =>
-                part.type?.startsWith("tool-") &&
-                part.state === "input-streaming",
-        )
-
-        toolParts?.forEach((part: any) => {
-            if (part.toolCallId) {
-                addToolOutput({
-                    tool: part.type.replace("tool-", ""),
-                    toolCallId: part.toolCallId,
-                    state: "output-error",
-                    errorText: "Stopped by user",
-                })
-            }
-        })
-
-        stop()
-    }, [messages, addToolOutput, stop])
-
    // Send chat message with headers
    const sendChatMessage = (
        parts: any,
@@ -1066,7 +939,7 @@ export default function ChatPanel({
        sendMessage(
            { parts },
            {
-                body: { xml, previousXml, sessionId, customSystemMessage },
+                body: { xml, previousXml, sessionId },
                headers: {
                    "x-access-code": config.accessCode,
                    ...(config.aiProvider && {
@@ -1092,14 +965,6 @@ export default function ChatPanel({
                        ...(config.awsSessionToken && {
                            "x-aws-session-token": config.awsSessionToken,
                        }),
-                        // Vertex AI credentials (Express Mode)
-                        ...(config.vertexApiKey && {
-                            "x-vertex-api-key": config.vertexApiKey,
-                        }),
-                    }),
-                    // Send selected model ID for server model lookup (apiKeyEnv/baseUrlEnv)
-                    ...(config.selectedModelId && {
-                        "x-selected-model-id": config.selectedModelId,
                    }),
                    ...(minimalStyle && {
                        "x-minimal-style": "true",
@@ -1390,10 +1255,6 @@ export default function ChatPanel({
                    onSelectSession={handleSelectSession}
                    onDeleteSession={handleDeleteSession}
                    loadedMessageIdsRef={loadedMessageIdsRef}
-                    validationStates={validationStates}
-                    onImproveWithSuggestions={handleImproveWithSuggestions}
-                    onSendTemplate={handleSendTemplate}
-                    currentInput={input}
                />
            </main>

@@ -1417,7 +1278,6 @@ export default function ChatPanel({
                    status={status}
                    onSubmit={onFormSubmit}
                    onChange={handleInputChange}
-                    onStop={handleStop}
                    files={files}
                    onFileChange={handleFileChange}
                    pdfData={pdfData}
@@ -1428,27 +1288,21 @@ export default function ChatPanel({
                    models={modelConfig.models}
                    selectedModelId={modelConfig.selectedModelId}
                    onModelSelect={modelConfig.setSelectedModelId}
-                    onConfigureModels={() => setShowModelConfigDialog(true)}
                    showUnvalidatedModels={modelConfig.showUnvalidatedModels}
-                    shouldFocus={shouldFocusInput}
-                    onFocused={() => setShouldFocusInput(false)}
+                    onConfigureModels={() => setShowModelConfigDialog(true)}
                />
            </footer>

            <SettingsDialog
                open={showSettingsDialog}
                onOpenChange={setShowSettingsDialog}
+                onCloseProtectionChange={onCloseProtectionChange}
                drawioUi={drawioUi}
-                onDrawioUiChange={onDrawioUiChange}
+                onToggleDrawioUi={onToggleDrawioUi}
                darkMode={darkMode}
                onToggleDarkMode={onToggleDarkMode}
                minimalStyle={minimalStyle}
                onMinimalStyleChange={setMinimalStyle}
-                vlmValidationEnabled={vlmValidationEnabled}
-                onVlmValidationChange={handleVlmValidationChange}
-                customSystemMessage={customSystemMessage}
-                onCustomSystemMessageChange={handleCustomSystemMessageChange}
-                onOpenModelConfig={() => setShowModelConfigDialog(true)}
            />

            <ModelConfigDialog
@@ -8,10 +8,9 @@ import {
    Trash2,
    X,
 } from "lucide-react"
-import { useEffect, useState } from "react"
-import { TemplatePanel } from "@/components/chat/TemplatePanel"
+import Image from "next/image"
+import { useState } from "react"
 import ExamplePanel from "@/components/chat-example-panel"
-import Image from "@/components/image-with-basepath"
 import {
    AlertDialog,
    AlertDialogAction,
@@ -22,8 +21,6 @@ import {
    AlertDialogHeader,
    AlertDialogTitle,
 } from "@/components/ui/alert-dialog"
-import { STORAGE_KEYS } from "@/lib/storage"
-import type { Template } from "@/lib/template-storage"

 interface SessionMetadata {
    id: string
@@ -38,8 +35,6 @@ interface ChatLobbyProps {
    onDeleteSession?: (id: string) => void
    setInput: (input: string) => void
    setFiles: (files: File[]) => void
-    onSendTemplate?: (template: Template) => void
-    currentInput?: string
    dict: {
        sessionHistory?: {
            recentChats?: string
@@ -49,10 +44,6 @@ interface ChatLobbyProps {
            deleteTitle?: string
            deleteDescription?: string
        }
-        templates?: {
-            title?: string
-            myTemplates?: string
-        }
        examples?: {
            quickExamples?: string
        }
@@ -84,239 +75,164 @@ function formatSessionDate(
    })
 }

-function getPanelVisibility() {
-    if (typeof window === "undefined")
-        return { recentChats: true, myTemplates: true, quickExamples: true }
-    return {
-        recentChats:
-            localStorage.getItem(STORAGE_KEYS.showRecentChats) !== "false",
-        myTemplates:
-            localStorage.getItem(STORAGE_KEYS.showMyTemplates) !== "false",
-        quickExamples:
-            localStorage.getItem(STORAGE_KEYS.showQuickExamples) !== "false",
-    }
-}
-
 export function ChatLobby({
    sessions,
    onSelectSession,
    onDeleteSession,
    setInput,
    setFiles,
-    onSendTemplate,
-    currentInput = "",
    dict,
 }: ChatLobbyProps) {
-    const [templatesExpanded, setTemplatesExpanded] = useState(true)
-    const [examplesExpanded, setExamplesExpanded] = useState(true)
-    const [panelVisibility, setPanelVisibility] = useState(getPanelVisibility)
+    // Track whether examples section is expanded (collapsed by default when there's history)
+    const [examplesExpanded, setExamplesExpanded] = useState(false)
+    // Delete confirmation dialog state
    const [deleteDialogOpen, setDeleteDialogOpen] = useState(false)
    const [sessionToDelete, setSessionToDelete] = useState<string | null>(null)
+    // Search filter for history
    const [searchQuery, setSearchQuery] = useState("")

-    // Listen for panel visibility changes from settings
-    useEffect(() => {
-        const handler = () => setPanelVisibility(getPanelVisibility())
-        window.addEventListener("panelVisibilityChange", handler)
-        return () =>
-            window.removeEventListener("panelVisibilityChange", handler)
-    }, [])
-
    const hasHistory = sessions.length > 0

    if (!hasHistory) {
-        if (!panelVisibility.myTemplates && !panelVisibility.quickExamples) {
-            return null
-        }
-        return (
-            <div className="animate-fade-in">
-                {panelVisibility.myTemplates && (
-                    <TemplatePanel
-                        setInput={setInput}
-                        onSendTemplate={onSendTemplate}
-                        currentInput={currentInput}
-                    />
-                )}
-                {panelVisibility.quickExamples && (
-                    <div className={panelVisibility.myTemplates ? "mt-6" : ""}>
-                        <ExamplePanel setInput={setInput} setFiles={setFiles} />
-                    </div>
-                )}
-            </div>
-        )
+        // Show full examples when no history
+        return <ExamplePanel setInput={setInput} setFiles={setFiles} />
    }

    // Show history + collapsible examples when there are sessions
    return (
        <div className="py-6 px-2 animate-fade-in">
            {/* Recent Chats Section */}
-            {panelVisibility.recentChats && (
-                <div className="mb-6">
-                    <p className="text-xs font-medium text-muted-foreground uppercase tracking-wider px-1 mb-3">
-                        {dict.sessionHistory?.recentChats || "Recent Chats"}
-                    </p>
-                    {/* Search Bar */}
-                    <div className="relative mb-3">
-                        <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-muted-foreground" />
-                        <input
-                            type="text"
-                            placeholder={
-                                dict.sessionHistory?.searchPlaceholder ||
-                                "Search chats..."
-                            }
-                            value={searchQuery}
-                            onChange={(e) => setSearchQuery(e.target.value)}
-                            className="w-full pl-9 pr-3 py-2 text-sm rounded-lg border border-border/60 bg-background focus:outline-none focus:ring-2 focus:ring-primary/30 focus:border-primary/50 transition-all"
-                        />
-                        {searchQuery && (
-                            <button
-                                type="button"
-                                onClick={() => setSearchQuery("")}
-                                className="absolute right-2 top-1/2 -translate-y-1/2 p-1 rounded hover:bg-muted transition-colors"
-                            >
-                                <X className="w-3 h-3 text-muted-foreground" />
-                            </button>
-                        )}
-                    </div>
-                    <div className="space-y-2">
-                        {sessions
-                            .filter((session) =>
-                                session.title
-                                    .toLowerCase()
-                                    .includes(searchQuery.toLowerCase()),
-                            )
-                            .map((session) => (
-                                // biome-ignore lint/a11y/useSemanticElements: Cannot use button - has nested delete button which causes hydration error
-                                <div
-                                    key={session.id}
-                                    role="button"
-                                    tabIndex={0}
-                                    className="group w-full flex items-center gap-3 p-3 rounded-xl border border-border/60 bg-card hover:bg-accent/50 hover:border-primary/30 transition-all duration-200 cursor-pointer text-left"
-                                    onClick={() => onSelectSession(session.id)}
-                                    onKeyDown={(e) => {
-                                        if (
-                                            e.key === "Enter" ||
-                                            e.key === " "
-                                        ) {
-                                            e.preventDefault()
-                                            onSelectSession(session.id)
-                                        }
-                                    }}
-                                >
-                                    {session.thumbnailDataUrl ? (
-                                        <div className="w-12 h-12 shrink-0 rounded-lg border bg-white overflow-hidden">
-                                            <Image
-                                                src={session.thumbnailDataUrl}
-                                                alt=""
-                                                width={48}
-                                                height={48}
-                                                className="object-contain w-full h-full"
-                                            />
-                                        </div>
-                                    ) : (
-                                        <div className="w-12 h-12 shrink-0 rounded-lg bg-primary/10 flex items-center justify-center">
-                                            <MessageSquare className="w-5 h-5 text-primary" />
-                                        </div>
-                                    )}
-                                    <div className="min-w-0 flex-1">
-                                        <div className="text-sm font-medium truncate">
-                                            {session.title}
-                                        </div>
-                                        <div className="text-xs text-muted-foreground">
-                                            {formatSessionDate(
-                                                session.updatedAt,
-                                                dict.sessionHistory,
-                                            )}
-                                        </div>
-                                    </div>
-                                    {onDeleteSession && (
-                                        <button
-                                            type="button"
-                                            onClick={(e) => {
-                                                e.stopPropagation()
-                                                setSessionToDelete(session.id)
-                                                setDeleteDialogOpen(true)
-                                            }}
-                                            className="p-1.5 rounded-lg opacity-0 group-hover:opacity-100 text-muted-foreground hover:text-destructive hover:bg-destructive/10 transition-all"
-                                            title={dict.common.delete}
-                                        >
-                                            <Trash2 className="w-4 h-4" />
-                                        </button>
-                                    )}
-                                </div>
-                            ))}
-                        {sessions.filter((s) =>
-                            s.title
+            <div className="mb-6">
+                <p className="text-xs font-medium text-muted-foreground uppercase tracking-wider px-1 mb-3">
+                    {dict.sessionHistory?.recentChats || "Recent Chats"}
+                </p>
+                {/* Search Bar */}
+                <div className="relative mb-3">
+                    <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-muted-foreground" />
+                    <input
+                        type="text"
+                        placeholder={
+                            dict.sessionHistory?.searchPlaceholder ||
+                            "Search chats..."
+                        }
+                        value={searchQuery}
+                        onChange={(e) => setSearchQuery(e.target.value)}
+                        className="w-full pl-9 pr-3 py-2 text-sm rounded-lg border border-border/60 bg-background focus:outline-none focus:ring-2 focus:ring-primary/30 focus:border-primary/50 transition-all"
+                    />
+                    {searchQuery && (
+                        <button
+                            type="button"
+                            onClick={() => setSearchQuery("")}
+                            className="absolute right-2 top-1/2 -translate-y-1/2 p-1 rounded hover:bg-muted transition-colors"
+                        >
+                            <X className="w-3 h-3 text-muted-foreground" />
+                        </button>
+                    )}
+                </div>
+                <div className="space-y-2">
+                    {sessions
+                        .filter((session) =>
+                            session.title
                                .toLowerCase()
                                .includes(searchQuery.toLowerCase()),
-                        ).length === 0 &&
-                            searchQuery && (
-                                <p className="text-sm text-muted-foreground text-center py-4">
-                                    {dict.sessionHistory?.noResults ||
-                                        "No chats found"}
-                                </p>
-                            )}
+                        )
+                        .map((session) => (
+                            // biome-ignore lint/a11y/useSemanticElements: Cannot use button - has nested delete button which causes hydration error
+                            <div
+                                key={session.id}
+                                role="button"
+                                tabIndex={0}
+                                className="group w-full flex items-center gap-3 p-3 rounded-xl border border-border/60 bg-card hover:bg-accent/50 hover:border-primary/30 transition-all duration-200 cursor-pointer text-left"
+                                onClick={() => onSelectSession(session.id)}
+                                onKeyDown={(e) => {
+                                    if (e.key === "Enter" || e.key === " ") {
+                                        e.preventDefault()
+                                        onSelectSession(session.id)
+                                    }
+                                }}
+                            >
+                                {session.thumbnailDataUrl ? (
+                                    <div className="w-12 h-12 shrink-0 rounded-lg border bg-white overflow-hidden">
+                                        <Image
+                                            src={session.thumbnailDataUrl}
+                                            alt=""
+                                            width={48}
+                                            height={48}
+                                            className="object-contain w-full h-full"
+                                        />
+                                    </div>
+                                ) : (
+                                    <div className="w-12 h-12 shrink-0 rounded-lg bg-primary/10 flex items-center justify-center">
+                                        <MessageSquare className="w-5 h-5 text-primary" />
+                                    </div>
+                                )}
+                                <div className="min-w-0 flex-1">
+                                    <div className="text-sm font-medium truncate">
+                                        {session.title}
+                                    </div>
+                                    <div className="text-xs text-muted-foreground">
+                                        {formatSessionDate(
+                                            session.updatedAt,
+                                            dict.sessionHistory,
+                                        )}
+                                    </div>
+                                </div>
+                                {onDeleteSession && (
+                                    <button
+                                        type="button"
+                                        onClick={(e) => {
+                                            e.stopPropagation()
+                                            setSessionToDelete(session.id)
+                                            setDeleteDialogOpen(true)
+                                        }}
+                                        className="p-1.5 rounded-lg opacity-0 group-hover:opacity-100 text-muted-foreground hover:text-destructive hover:bg-destructive/10 transition-all"
+                                        title={dict.common.delete}
+                                    >
+                                        <Trash2 className="w-4 h-4" />
+                                    </button>
+                                )}
+                            </div>
+                        ))}
+                    {sessions.filter((s) =>
+                        s.title
+                            .toLowerCase()
+                            .includes(searchQuery.toLowerCase()),
+                    ).length === 0 &&
+                        searchQuery && (
+                            <p className="text-sm text-muted-foreground text-center py-4">
+                                {dict.sessionHistory?.noResults ||
+                                    "No chats found"}
+                            </p>
+                        )}
+                </div>
+            </div>
+
+            {/* Collapsible Examples Section */}
+            <div className="border-t border-border/50 pt-4">
+                <button
+                    type="button"
+                    onClick={() => setExamplesExpanded(!examplesExpanded)}
+                    className="w-full flex items-center justify-between px-1 py-2 text-xs font-medium text-muted-foreground uppercase tracking-wider hover:text-foreground transition-colors"
+                >
+                    <span>
+                        {dict.examples?.quickExamples || "Quick Examples"}
+                    </span>
+                    {examplesExpanded ? (
+                        <ChevronUp className="w-4 h-4" />
+                    ) : (
+                        <ChevronDown className="w-4 h-4" />
+                    )}
+                </button>
+                {examplesExpanded && (
+                    <div className="mt-2">
+                        <ExamplePanel
+                            setInput={setInput}
+                            setFiles={setFiles}
+                            minimal
+                        />
                    </div>
-                </div>
-            )}
-
-            {/* Collapsible My Templates Section */}
-            {panelVisibility.myTemplates && (
-                <div className="border-t border-border/50 pt-4">
-                    <button
-                        type="button"
-                        onClick={() => setTemplatesExpanded(!templatesExpanded)}
-                        className="w-full flex items-center justify-between px-1 py-2 text-xs font-medium text-muted-foreground uppercase tracking-wider hover:text-foreground transition-colors"
-                    >
-                        <span>
-                            {dict.templates?.myTemplates || "My Templates"}
-                        </span>
-                        {templatesExpanded ? (
-                            <ChevronUp className="w-4 h-4" />
-                        ) : (
-                            <ChevronDown className="w-4 h-4" />
-                        )}
-                    </button>
-                    {templatesExpanded && (
-                        <div className="mt-2">
-                            <TemplatePanel
-                                setInput={setInput}
-                                onSendTemplate={onSendTemplate}
-                                currentInput={currentInput}
-                            />
-                        </div>
-                    )}
-                </div>
-            )}
-
-            {/* Collapsible Quick Examples Section */}
-            {panelVisibility.quickExamples && (
-                <div className="border-t border-border/50 pt-4">
-                    <button
-                        type="button"
-                        onClick={() => setExamplesExpanded(!examplesExpanded)}
-                        className="w-full flex items-center justify-between px-1 py-2 text-xs font-medium text-muted-foreground uppercase tracking-wider hover:text-foreground transition-colors"
-                    >
-                        <span>
-                            {dict.examples?.quickExamples || "Quick Examples"}
-                        </span>
-                        {examplesExpanded ? (
-                            <ChevronUp className="w-4 h-4" />
-                        ) : (
-                            <ChevronDown className="w-4 h-4" />
-                        )}
-                    </button>
-                    {examplesExpanded && (
-                        <div className="mt-2">
-                            <ExamplePanel
-                                setInput={setInput}
-                                setFiles={setFiles}
-                                minimal
-                            />
-                        </div>
-                    )}
-                </div>
-            )}
+                )}
+            </div>

            {/* Delete Confirmation Dialog */}
            <AlertDialog
@@ -1,203 +0,0 @@
-"use client"
-
-import { Bookmark, Plus } from "lucide-react"
-import { useEffect, useState } from "react"
-import { Button } from "@/components/ui/button"
-import {
-    Dialog,
-    DialogContent,
-    DialogDescription,
-    DialogFooter,
-    DialogHeader,
-    DialogTitle,
-} from "@/components/ui/dialog"
-import { Input } from "@/components/ui/input"
-import { Label } from "@/components/ui/label"
-import { Switch } from "@/components/ui/switch"
-import { Textarea } from "@/components/ui/textarea"
-import { useDictionary } from "@/hooks/use-dictionary"
-import {
-    createTemplate,
-    type TemplateCreateInput,
-} from "@/lib/template-storage"
-
-interface TemplateCreateDialogProps {
-    open: boolean
-    onOpenChange: (open: boolean) => void
-    onSuccess: () => void
-    initialPrompt?: string
-}
-
-export function TemplateCreateDialog({
-    open,
-    onOpenChange,
-    onSuccess,
-    initialPrompt = "",
-}: TemplateCreateDialogProps) {
-    const dict = useDictionary()
-    const [title, setTitle] = useState("")
-    const [description, setDescription] = useState("")
-    const [prompt, setPrompt] = useState("")
-    const [pinned, setPinned] = useState(false)
-    const [isSubmitting, setIsSubmitting] = useState(false)
-    const [error, setError] = useState<string | null>(null)
-
-    // Reset form when dialog opens with the latest initialPrompt
-    useEffect(() => {
-        if (open) {
-            setTitle("")
-            setDescription("")
-            setPrompt(initialPrompt)
-            setPinned(false)
-            setError(null)
-        }
-    }, [open, initialPrompt])
-
-    const handleSubmit = async (e: React.FormEvent) => {
-        e.preventDefault()
-
-        const trimmedPrompt = prompt.trim()
-        if (!trimmedPrompt) {
-            setError(dict.templates.promptRequired)
-            return
-        }
-
-        setIsSubmitting(true)
-        setError(null)
-
-        try {
-            const input: TemplateCreateInput = {
-                prompt: trimmedPrompt,
-                title: title.trim() || undefined,
-                description: description.trim() || undefined,
-                pinned,
-            }
-
-            const template = await createTemplate(input)
-            if (template) {
-                onSuccess()
-                onOpenChange(false)
-            } else {
-                setError(dict.templates.createFailed)
-            }
-        } catch (err) {
-            console.error("Failed to create template:", err)
-            setError(dict.templates.createFailed)
-        } finally {
-            setIsSubmitting(false)
-        }
-    }
-
-    return (
-        <Dialog open={open} onOpenChange={onOpenChange}>
-            <DialogContent className="sm:max-w-[500px] overflow-hidden">
-                <form onSubmit={handleSubmit}>
-                    <DialogHeader>
-                        <DialogTitle className="flex items-center gap-2">
-                            <Plus className="w-5 h-5" />
-                            {dict.templates.createTitle}
-                        </DialogTitle>
-                        <DialogDescription>
-                            {dict.templates.createDescription}
-                        </DialogDescription>
-                    </DialogHeader>
-
-                    <div className="space-y-4 py-4">
-                        {/* Prompt field - required */}
-                        <div className="space-y-2">
-                            <Label htmlFor="prompt" className="text-foreground">
-                                {dict.templates.promptLabel}
-                                <span className="text-destructive ml-1">*</span>
-                            </Label>
-                            <Textarea
-                                id="prompt"
-                                value={prompt}
-                                onChange={(e) => setPrompt(e.target.value)}
-                                placeholder={dict.templates.promptPlaceholder}
-                                className="min-h-[100px] resize-none break-words"
-                                required
-                            />
-                        </div>
-
-                        {/* Title field - optional */}
-                        <div className="space-y-2">
-                            <Label htmlFor="title" className="text-foreground">
-                                {dict.templates.titleLabel}
-                            </Label>
-                            <Input
-                                id="title"
-                                value={title}
-                                onChange={(e) => setTitle(e.target.value)}
-                                placeholder={dict.templates.titlePlaceholder}
-                            />
-                            <p className="text-xs text-muted-foreground">
-                                {dict.templates.titleHint}
-                            </p>
-                        </div>
-
-                        {/* Description field - optional */}
-                        <div className="space-y-2">
-                            <Label
-                                htmlFor="description"
-                                className="text-foreground"
-                            >
-                                {dict.templates.descriptionLabel}
-                            </Label>
-                            <Textarea
-                                id="description"
-                                value={description}
-                                onChange={(e) => setDescription(e.target.value)}
-                                placeholder={
-                                    dict.templates.descriptionPlaceholder
-                                }
-                                className="min-h-[60px] resize-none"
-                            />
-                        </div>
-
-                        {/* Pinned switch */}
-                        <div className="flex items-center justify-between">
-                            <div className="space-y-0.5">
-                                <Label
-                                    htmlFor="pinned"
-                                    className="flex items-center gap-2 text-foreground"
-                                >
-                                    <Bookmark className="w-4 h-4" />
-                                    {dict.templates.pinnedLabel}
-                                </Label>
-                                <p className="text-xs text-muted-foreground">
-                                    {dict.templates.pinnedHint}
-                                </p>
-                            </div>
-                            <Switch
-                                id="pinned"
-                                checked={pinned}
-                                onCheckedChange={setPinned}
-                            />
-                        </div>
-
-                        {/* Error message */}
-                        {error && (
-                            <p className="text-sm text-destructive">{error}</p>
-                        )}
-                    </div>
-
-                    <DialogFooter>
-                        <Button
-                            type="button"
-                            variant="outline"
-                            onClick={() => onOpenChange(false)}
-                            disabled={isSubmitting}
-                        >
-                            {dict.common.cancel}
-                        </Button>
-                        <Button type="submit" disabled={isSubmitting}>
-                            {isSubmitting
-                                ? dict.common.loading
-                                : dict.templates.createButton}
-                        </Button>
-                    </DialogFooter>
-                </form>
-            </DialogContent>
-        </Dialog>
-    )
-}
@@ -1,215 +0,0 @@
-"use client"
-
-import { Bookmark, Edit2 } from "lucide-react"
-import { useEffect, useState } from "react"
-import { Button } from "@/components/ui/button"
-import {
-    Dialog,
-    DialogContent,
-    DialogDescription,
-    DialogFooter,
-    DialogHeader,
-    DialogTitle,
-} from "@/components/ui/dialog"
-import { Input } from "@/components/ui/input"
-import { Label } from "@/components/ui/label"
-import { Switch } from "@/components/ui/switch"
-import { Textarea } from "@/components/ui/textarea"
-import { useDictionary } from "@/hooks/use-dictionary"
-import { type Template, updateTemplate } from "@/lib/template-storage"
-
-interface TemplateEditDialogProps {
-    open: boolean
-    onOpenChange: (open: boolean) => void
-    template: Template | null
-    onSuccess: () => void
-}
-
-export function TemplateEditDialog({
-    open,
-    onOpenChange,
-    template,
-    onSuccess,
-}: TemplateEditDialogProps) {
-    const dict = useDictionary()
-    const [title, setTitle] = useState("")
-    const [description, setDescription] = useState("")
-    const [prompt, setPrompt] = useState("")
-    const [pinned, setPinned] = useState(false)
-    const [isSubmitting, setIsSubmitting] = useState(false)
-    const [error, setError] = useState<string | null>(null)
-
-    // Populate form when template changes
-    useEffect(() => {
-        if (template) {
-            setTitle(template.title || "")
-            setDescription(template.description || "")
-            setPrompt(template.prompt || "")
-            setPinned(template.pinned || false)
-            setError(null)
-        }
-    }, [template])
-
-    const handleOpenChange = (newOpen: boolean) => {
-        if (!newOpen) {
-            setError(null)
-        }
-        onOpenChange(newOpen)
-    }
-
-    const handleSubmit = async (e: React.FormEvent) => {
-        e.preventDefault()
-
-        if (!template) return
-
-        const trimmedPrompt = prompt.trim()
-        if (!trimmedPrompt) {
-            setError(dict.templates.promptRequired)
-            return
-        }
-
-        setIsSubmitting(true)
-        setError(null)
-
-        try {
-            const updates: Partial<Omit<Template, "id" | "createdAt">> = {
-                prompt: trimmedPrompt,
-                title: title.trim() || template.title,
-                description: description.trim() || undefined,
-                pinned,
-            }
-
-            const updated = await updateTemplate(template.id, updates)
-            if (updated) {
-                onSuccess()
-                onOpenChange(false)
-            } else {
-                setError(dict.templates.updateFailed)
-            }
-        } catch (err) {
-            console.error("Failed to update template:", err)
-            setError(dict.templates.updateFailed)
-        } finally {
-            setIsSubmitting(false)
-        }
-    }
-
-    return (
-        <Dialog open={open} onOpenChange={handleOpenChange}>
-            <DialogContent className="sm:max-w-[500px] overflow-hidden">
-                <form onSubmit={handleSubmit}>
-                    <DialogHeader>
-                        <DialogTitle className="flex items-center gap-2">
-                            <Edit2 className="w-5 h-5" />
-                            {dict.templates.editTitle}
-                        </DialogTitle>
-                        <DialogDescription>
-                            {dict.templates.editDescription}
-                        </DialogDescription>
-                    </DialogHeader>
-
-                    <div className="space-y-4 py-4">
-                        {/* Prompt field - required */}
-                        <div className="space-y-2">
-                            <Label
-                                htmlFor="edit-prompt"
-                                className="text-foreground"
-                            >
-                                {dict.templates.promptLabel}
-                                <span className="text-destructive ml-1">*</span>
-                            </Label>
-                            <Textarea
-                                id="edit-prompt"
-                                value={prompt}
-                                onChange={(e) => setPrompt(e.target.value)}
-                                placeholder={dict.templates.promptPlaceholder}
-                                className="min-h-[100px] resize-none break-words"
-                                required
-                            />
-                        </div>
-
-                        {/* Title field - optional */}
-                        <div className="space-y-2">
-                            <Label
-                                htmlFor="edit-title"
-                                className="text-foreground"
-                            >
-                                {dict.templates.titleLabel}
-                            </Label>
-                            <Input
-                                id="edit-title"
-                                value={title}
-                                onChange={(e) => setTitle(e.target.value)}
-                                placeholder={dict.templates.titlePlaceholder}
-                            />
-                            <p className="text-xs text-muted-foreground">
-                                {dict.templates.titleHint}
-                            </p>
-                        </div>
-
-                        {/* Description field - optional */}
-                        <div className="space-y-2">
-                            <Label
-                                htmlFor="edit-description"
-                                className="text-foreground"
-                            >
-                                {dict.templates.descriptionLabel}
-                            </Label>
-                            <Textarea
-                                id="edit-description"
-                                value={description}
-                                onChange={(e) => setDescription(e.target.value)}
-                                placeholder={
-                                    dict.templates.descriptionPlaceholder
-                                }
-                                className="min-h-[60px] resize-none"
-                            />
-                        </div>
-
-                        {/* Pinned switch */}
-                        <div className="flex items-center justify-between">
-                            <div className="space-y-0.5">
-                                <Label
-                                    htmlFor="edit-pinned"
-                                    className="flex items-center gap-2 text-foreground"
-                                >
-                                    <Bookmark className="w-4 h-4" />
-                                    {dict.templates.pinnedLabel}
-                                </Label>
-                                <p className="text-xs text-muted-foreground">
-                                    {dict.templates.pinnedHint}
-                                </p>
-                            </div>
-                            <Switch
-                                id="edit-pinned"
-                                checked={pinned}
-                                onCheckedChange={setPinned}
-                            />
-                        </div>
-
-                        {/* Error message */}
-                        {error && (
-                            <p className="text-sm text-destructive">{error}</p>
-                        )}
-                    </div>
-
-                    <DialogFooter>
-                        <Button
-                            type="button"
-                            variant="outline"
-                            onClick={() => onOpenChange(false)}
-                            disabled={isSubmitting}
-                        >
-                            {dict.common.cancel}
-                        </Button>
-                        <Button type="submit" disabled={isSubmitting}>
-                            {isSubmitting
-                                ? dict.common.loading
-                                : dict.common.save}
-                        </Button>
-                    </DialogFooter>
-                </form>
-            </DialogContent>
-        </Dialog>
-    )
-}
@@ -1,622 +0,0 @@
-"use client"
-
-import {
-    Bookmark,
-    Copy,
-    Download,
-    Edit2,
-    FileText,
-    Plus,
-    Search,
-    Trash2,
-    Upload,
-} from "lucide-react"
-import { useCallback, useEffect, useRef, useState } from "react"
-import {
-    AlertDialog,
-    AlertDialogAction,
-    AlertDialogCancel,
-    AlertDialogContent,
-    AlertDialogDescription,
-    AlertDialogFooter,
-    AlertDialogHeader,
-    AlertDialogTitle,
-} from "@/components/ui/alert-dialog"
-import { useDictionary } from "@/hooks/use-dictionary"
-import {
-    deleteTemplate,
-    duplicateTemplate,
-    exportTemplates,
-    getAllTemplates,
-    importTemplates,
-    incrementClickCount,
-    incrementRunCount,
-    searchTemplates,
-    type Template,
-    updateTemplate,
-    validateImportData,
-} from "@/lib/template-storage"
-import { TemplateCreateDialog } from "./TemplateCreateDialog"
-import { TemplateEditDialog } from "./TemplateEditDialog"
-
-interface TemplatePanelProps {
-    setInput: (input: string) => void
-    onSendTemplate?: (template: Template) => void
-    currentInput?: string
-}
-
-function formatLastUsed(timestamp: number, neverUsedText: string): string {
-    if (!timestamp) return neverUsedText
-    const now = Date.now()
-    const diffMs = now - timestamp
-    const diffMins = Math.floor(diffMs / (1000 * 60))
-    const diffHours = Math.floor(diffMs / (1000 * 60 * 60))
-    const diffDays = Math.floor(diffMs / (1000 * 60 * 60 * 24))
-
-    try {
-        const rtf = new Intl.RelativeTimeFormat(undefined, { numeric: "auto" })
-        if (diffMins < 1) return rtf.format(0, "minute")
-        if (diffMins < 60) return rtf.format(-diffMins, "minute")
-        if (diffHours < 24) return rtf.format(-diffHours, "hour")
-        if (diffDays < 7) return rtf.format(-diffDays, "day")
-    } catch {
-        // Fallback if Intl.RelativeTimeFormat is not available
-        if (diffMins < 1) return "<1m ago"
-        if (diffMins < 60) return `${diffMins}m ago`
-        if (diffHours < 24) return `${diffHours}h ago`
-        if (diffDays < 7) return `${diffDays}d ago`
-    }
-
-    return new Date(timestamp).toLocaleDateString(undefined, {
-        month: "short",
-        day: "numeric",
-    })
-}
-
-export function TemplatePanel({
-    setInput,
-    onSendTemplate,
-    currentInput = "",
-}: TemplatePanelProps) {
-    const dict = useDictionary()
-    const [templates, setTemplates] = useState<Template[]>([])
-    const [loading, setLoading] = useState(true)
-    const [createDialogOpen, setCreateDialogOpen] = useState(false)
-    const [editDialogOpen, setEditDialogOpen] = useState(false)
-    const [templateToEdit, setTemplateToEdit] = useState<Template | null>(null)
-    const [deleteDialogOpen, setDeleteDialogOpen] = useState(false)
-    const [templateToDelete, setTemplateToDelete] = useState<Template | null>(
-        null,
-    )
-    const [confirmSendDialogOpen, setConfirmSendDialogOpen] = useState(false)
-    const [templateToSend, setTemplateToSend] = useState<Template | null>(null)
-    const [searchQuery, setSearchQuery] = useState("")
-    const fileInputRef = useRef<HTMLInputElement>(null)
-    const [importMessage, setImportMessage] = useState<{
-        type: "success" | "error"
-        text: string
-    } | null>(null)
-
-    const loadTemplates = useCallback(async () => {
-        const result = await getAllTemplates()
-        setTemplates(result)
-        setLoading(false)
-    }, [])
-
-    // Filter templates by search query
-    const filteredTemplates = searchQuery.trim()
-        ? searchTemplates(templates, searchQuery)
-        : templates
-
-    useEffect(() => {
-        loadTemplates()
-    }, [loadTemplates])
-
-    const handleCreateSuccess = () => {
-        loadTemplates()
-    }
-
-    const handleEditSuccess = () => {
-        loadTemplates()
-    }
-
-    const handleEdit = (template: Template) => {
-        setTemplateToEdit(template)
-        setEditDialogOpen(true)
-    }
-
-    const handleDuplicate = async (template: Template) => {
-        const duplicated = await duplicateTemplate(
-            template.id,
-            dict.templates.copySuffix || "(copy)",
-        )
-        if (duplicated) {
-            loadTemplates()
-        }
-    }
-
-    const handleDeleteClick = (template: Template) => {
-        setTemplateToDelete(template)
-        setDeleteDialogOpen(true)
-    }
-
-    const handleDeleteConfirm = async () => {
-        if (!templateToDelete) return
-        const success = await deleteTemplate(templateToDelete.id)
-        if (success) {
-            loadTemplates()
-        }
-        setDeleteDialogOpen(false)
-        setTemplateToDelete(null)
-    }
-
-    const handleTogglePin = async (template: Template) => {
-        const updated = await updateTemplate(template.id, {
-            pinned: !template.pinned,
-        })
-        if (updated) {
-            loadTemplates()
-        }
-    }
-
-    // Handle template card click - send directly or show confirmation
-    const handleTemplateClick = async (template: Template) => {
-        // If there's unsent content in the input, show confirmation dialog
-        if (currentInput.trim()) {
-            setTemplateToSend(template)
-            setConfirmSendDialogOpen(true)
-            return
-        }
-
-        // No unsent content, send directly
-        await sendTemplate(template)
-    }
-
-    // Actually send the template
-    const sendTemplate = async (template: Template) => {
-        // Increment click count only when actually sending
-        await incrementClickCount(template.id)
-        if (onSendTemplate) {
-            // Increment run count and update lastUsedAt
-            await incrementRunCount(template.id)
-            // Reload to show updated stats
-            loadTemplates()
-            // Call the send callback
-            onSendTemplate(template)
-        } else {
-            // Fallback: just fill the input if no send callback provided
-            setInput(template.prompt)
-        }
-        setConfirmSendDialogOpen(false)
-        setTemplateToSend(null)
-    }
-
-    // Handle confirmation dialog - user confirmed to send template
-    const handleConfirmSend = async () => {
-        if (!templateToSend) return
-        await sendTemplate(templateToSend)
-    }
-
-    // Handle cancel - close dialog without sending
-    const handleCancelSend = () => {
-        setConfirmSendDialogOpen(false)
-        setTemplateToSend(null)
-    }
-
-    // Export templates to JSON file
-    const handleExport = () => {
-        if (templates.length === 0) {
-            setImportMessage({
-                type: "error",
-                text: dict.templates.exportEmpty || "No templates to export",
-            })
-            return
-        }
-
-        try {
-            const exportData = exportTemplates(templates)
-            const json = JSON.stringify(exportData, null, 2)
-            const blob = new Blob([json], { type: "application/json" })
-            const url = URL.createObjectURL(blob)
-            const a = document.createElement("a")
-            a.href = url
-            a.download = `templates-${new Date().toISOString().split("T")[0]}.json`
-            document.body.appendChild(a)
-            a.click()
-            document.body.removeChild(a)
-            URL.revokeObjectURL(url)
-
-            setImportMessage({
-                type: "success",
-                text: dict.templates.exportSuccess.replace(
-                    "{count}",
-                    String(templates.length),
-                ),
-            })
-            setTimeout(() => setImportMessage(null), 3000)
-        } catch (error) {
-            console.error("Failed to export templates:", error)
-            setImportMessage({
-                type: "error",
-                text: `Export failed: ${error instanceof Error ? error.message : "Unknown error"}`,
-            })
-        }
-    }
-
-    // Import templates from JSON file
-    const handleImport = async (event: React.ChangeEvent<HTMLInputElement>) => {
-        const file = event.target.files?.[0]
-        if (!file) {
-            setImportMessage({
-                type: "error",
-                text:
-                    dict.templates.importNoFile || "Please select a JSON file",
-            })
-            return
-        }
-
-        try {
-            const text = await file.text()
-            const data = JSON.parse(text)
-
-            // Validate import data
-            const validation = validateImportData(data)
-            if (!validation.valid) {
-                setImportMessage({
-                    type: "error",
-                    text: dict.templates.importFailed.replace(
-                        "{error}",
-                        validation.error || "Invalid data",
-                    ),
-                })
-                return
-            }
-
-            // Import templates with dedup-append strategy
-            const result = await importTemplates(data.templates, templates)
-
-            // Reload template list
-            await loadTemplates()
-
-            setImportMessage({
-                type: "success",
-                text: dict.templates.importSuccess
-                    .replace("{imported}", String(result.imported))
-                    .replace("{skipped}", String(result.skipped)),
-            })
-            setTimeout(() => setImportMessage(null), 5000)
-        } catch (error) {
-            console.error("Failed to import templates:", error)
-            setImportMessage({
-                type: "error",
-                text: dict.templates.importFailed.replace(
-                    "{error}",
-                    error instanceof Error ? error.message : "Unknown error",
-                ),
-            })
-        } finally {
-            // Reset file input
-            if (fileInputRef.current) {
-                fileInputRef.current.value = ""
-            }
-        }
-    }
-
-    // Empty state: no templates at all
-    if (!loading && templates.length === 0) {
-        return (
-            <div className="py-6 px-2 animate-fade-in">
-                <div className="text-center mb-6">
-                    <h2 className="text-lg font-semibold text-foreground mb-2">
-                        {dict.templates.title}
-                    </h2>
-                    <p className="text-sm text-muted-foreground max-w-xs mx-auto">
-                        {dict.templates.subtitle}
-                    </p>
-                </div>
-                <div className="flex flex-col items-center justify-center py-8 px-4">
-                    <div className="w-16 h-16 rounded-2xl bg-primary/10 flex items-center justify-center mb-4">
-                        <FileText className="w-8 h-8 text-primary/60" />
-                    </div>
-                    <p className="text-sm font-medium text-foreground mb-1">
-                        {dict.templates.emptyTitle}
-                    </p>
-                    <p className="text-xs text-muted-foreground text-center max-w-[240px] mb-4">
-                        {dict.templates.emptyDescription}
-                    </p>
-                    <button
-                        type="button"
-                        className="inline-flex items-center gap-2 px-4 py-2 rounded-lg bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 transition-colors"
-                        onClick={() => setCreateDialogOpen(true)}
-                    >
-                        <Plus className="w-4 h-4" />
-                        {dict.templates.createFirst}
-                    </button>
-
-                    <TemplateCreateDialog
-                        open={createDialogOpen}
-                        onOpenChange={setCreateDialogOpen}
-                        onSuccess={handleCreateSuccess}
-                    />
-                </div>
-            </div>
-        )
-    }
-
-    // Template list
-    return (
-        <div className="py-2 px-2 animate-fade-in">
-            <div className="space-y-3">
-                {/* Search bar */}
-                <div className="relative">
-                    <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-muted-foreground pointer-events-none" />
-                    <input
-                        type="text"
-                        value={searchQuery}
-                        onChange={(e) => setSearchQuery(e.target.value)}
-                        placeholder={dict.templates.searchPlaceholder}
-                        className="w-full pl-9 pr-3 py-2 text-sm rounded-lg border border-border/60 bg-background focus:outline-none focus:ring-2 focus:ring-primary/30 focus:border-primary/50 transition-all"
-                    />
-                </div>
-
-                {/* Action buttons */}
-                <div className="flex items-center gap-2">
-                    <button
-                        type="button"
-                        onClick={() => setCreateDialogOpen(true)}
-                        className="inline-flex items-center gap-1.5 px-3 py-1.5 rounded-md text-xs font-medium text-primary hover:bg-primary/10 transition-colors"
-                    >
-                        <Plus className="w-3.5 h-3.5" />
-                        {dict.templates.createButton}
-                    </button>
-                    <div className="flex-1" />
-                    <button
-                        type="button"
-                        onClick={handleExport}
-                        disabled={templates.length === 0}
-                        className="inline-flex items-center gap-1.5 px-3 py-1.5 rounded-md text-xs font-medium text-muted-foreground hover:text-foreground hover:bg-muted transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
-                        title={dict.templates.exportTemplates}
-                    >
-                        <Download className="w-3.5 h-3.5" />
-                        {dict.templates.exportTemplates}
-                    </button>
-                    <button
-                        type="button"
-                        onClick={() => fileInputRef.current?.click()}
-                        className="inline-flex items-center gap-1.5 px-3 py-1.5 rounded-md text-xs font-medium text-muted-foreground hover:text-foreground hover:bg-muted transition-colors"
-                        title={dict.templates.importTemplates}
-                    >
-                        <Upload className="w-3.5 h-3.5" />
-                        {dict.templates.importTemplates}
-                    </button>
-                    <input
-                        ref={fileInputRef}
-                        type="file"
-                        accept="application/json,.json"
-                        onChange={handleImport}
-                        className="hidden"
-                    />
-                </div>
-
-                {/* Import message */}
-                {importMessage && (
-                    <div
-                        className={`text-xs px-3 py-2 rounded-lg ${
-                            importMessage.type === "success"
-                                ? "bg-green-100 text-green-800 dark:bg-green-900/30 dark:text-green-400"
-                                : "bg-red-100 text-red-800 dark:bg-red-900/30 dark:text-red-400"
-                        }`}
-                    >
-                        {importMessage.text}
-                    </div>
-                )}
-
-                <div className="space-y-2">
-                    {loading
-                        ? // Loading skeleton
-                          Array.from({ length: 3 }).map((_, i) => (
-                              <div
-                                  key={`skeleton-${String(i)}`}
-                                  className="w-full p-4 rounded-xl border border-border/60 bg-card animate-pulse"
-                              >
-                                  <div className="flex items-start gap-3">
-                                      <div className="w-9 h-9 rounded-lg bg-muted shrink-0" />
-                                      <div className="flex-1 space-y-2">
-                                          <div className="h-4 bg-muted rounded w-2/3" />
-                                          <div className="h-3 bg-muted rounded w-1/2" />
-                                      </div>
-                                  </div>
-                              </div>
-                          ))
-                        : filteredTemplates.length === 0
-                          ? // Search empty state
-                            !loading && (
-                                <div className="flex flex-col items-center justify-center py-6 px-4">
-                                    <Search className="w-8 h-8 text-muted-foreground/40 mb-2" />
-                                    <p className="text-sm text-muted-foreground text-center">
-                                        {dict.templates.searchNoResults}
-                                    </p>
-                                </div>
-                            )
-                          : filteredTemplates.map((template) => (
-                                // biome-ignore lint/a11y/useSemanticElements: Cannot use button - has nested action buttons which causes hydration error
-                                <div
-                                    key={template.id}
-                                    className="group w-full flex items-center gap-3 p-3 rounded-xl border border-border/60 bg-card hover:bg-accent/50 hover:border-primary/30 transition-all duration-200 cursor-pointer text-left"
-                                    onClick={() =>
-                                        handleTemplateClick(template)
-                                    }
-                                    onKeyDown={(e) => {
-                                        if (
-                                            e.key === "Enter" ||
-                                            e.key === " "
-                                        ) {
-                                            e.preventDefault()
-                                            handleTemplateClick(template)
-                                        }
-                                    }}
-                                    role="button"
-                                    tabIndex={0}
-                                >
-                                    <div className="min-w-0 flex-1">
-                                        <div className="flex items-center gap-2">
-                                            <div className="text-sm font-medium truncate">
-                                                {template.title}
-                                            </div>
-                                            {template.pinned && (
-                                                <Bookmark className="w-3 h-3 text-primary fill-primary shrink-0" />
-                                            )}
-                                        </div>
-                                        {template.description && (
-                                            <div className="text-xs text-muted-foreground truncate">
-                                                {template.description}
-                                            </div>
-                                        )}
-                                    </div>
-                                    {/* Actions and stats */}
-                                    <div className="relative shrink-0">
-                                        <div className="text-[11px] text-muted-foreground whitespace-nowrap group-hover:invisible">
-                                            {template.runCount > 0
-                                                ? `${dict.templates.usedCount.replace("{count}", String(template.runCount))} · ${formatLastUsed(template.lastUsedAt, dict.templates.neverUsed)}`
-                                                : dict.templates.neverUsed}
-                                        </div>
-                                        <div className="absolute inset-0 flex items-center justify-end gap-0.5 opacity-0 group-hover:opacity-100 group-focus-within:opacity-100 transition-opacity">
-                                            <button
-                                                type="button"
-                                                onClick={(e) => {
-                                                    e.stopPropagation()
-                                                    handleTogglePin(template)
-                                                }}
-                                                className={`p-1.5 rounded-lg transition-all ${
-                                                    template.pinned
-                                                        ? "text-primary hover:text-primary/80 hover:bg-primary/10"
-                                                        : "text-muted-foreground hover:text-foreground hover:bg-muted"
-                                                }`}
-                                                title={
-                                                    template.pinned
-                                                        ? dict.templates
-                                                              .unpin || "Unpin"
-                                                        : dict.templates.pin ||
-                                                          "Pin"
-                                                }
-                                            >
-                                                <Bookmark
-                                                    className={`w-4 h-4 ${template.pinned ? "fill-current" : ""}`}
-                                                />
-                                            </button>
-                                            <button
-                                                type="button"
-                                                onClick={(e) => {
-                                                    e.stopPropagation()
-                                                    handleEdit(template)
-                                                }}
-                                                className="p-1.5 rounded-lg text-muted-foreground hover:text-foreground hover:bg-muted transition-all"
-                                                title={dict.common.edit}
-                                            >
-                                                <Edit2 className="w-4 h-4" />
-                                            </button>
-                                            <button
-                                                type="button"
-                                                onClick={(e) => {
-                                                    e.stopPropagation()
-                                                    handleDuplicate(template)
-                                                }}
-                                                className="p-1.5 rounded-lg text-muted-foreground hover:text-foreground hover:bg-muted transition-all"
-                                                title={
-                                                    dict.templates.duplicate ||
-                                                    "Duplicate"
-                                                }
-                                            >
-                                                <Copy className="w-4 h-4" />
-                                            </button>
-                                            <button
-                                                type="button"
-                                                onClick={(e) => {
-                                                    e.stopPropagation()
-                                                    handleDeleteClick(template)
-                                                }}
-                                                className="p-1.5 rounded-lg text-muted-foreground hover:text-destructive hover:bg-destructive/10 transition-all"
-                                                title={dict.common.delete}
-                                            >
-                                                <Trash2 className="w-4 h-4" />
-                                            </button>
-                                        </div>
-                                    </div>
-                                </div>
-                            ))}
-                </div>
-            </div>
-
-            <TemplateCreateDialog
-                open={createDialogOpen}
-                onOpenChange={setCreateDialogOpen}
-                onSuccess={handleCreateSuccess}
-            />
-
-            <TemplateEditDialog
-                open={editDialogOpen}
-                onOpenChange={setEditDialogOpen}
-                template={templateToEdit}
-                onSuccess={handleEditSuccess}
-            />
-
-            {/* Delete Confirmation Dialog */}
-            <AlertDialog
-                open={deleteDialogOpen}
-                onOpenChange={setDeleteDialogOpen}
-            >
-                <AlertDialogContent className="max-w-sm">
-                    <AlertDialogHeader>
-                        <AlertDialogTitle>
-                            {dict.templates.deleteTitle ||
-                                "Delete this template?"}
-                        </AlertDialogTitle>
-                        <AlertDialogDescription>
-                            {dict.templates.deleteDescription ||
-                                "This will permanently delete this template. This action cannot be undone."}
-                        </AlertDialogDescription>
-                    </AlertDialogHeader>
-                    <AlertDialogFooter>
-                        <AlertDialogCancel>
-                            {dict.common.cancel}
-                        </AlertDialogCancel>
-                        <AlertDialogAction
-                            onClick={handleDeleteConfirm}
-                            className="border border-red-300 bg-red-50 text-red-700 hover:bg-red-100 hover:border-red-400"
-                        >
-                            {dict.common.delete}
-                        </AlertDialogAction>
-                    </AlertDialogFooter>
-                </AlertDialogContent>
-            </AlertDialog>
-
-            {/* Confirm Send Dialog - when there's unsent input */}
-            <AlertDialog
-                open={confirmSendDialogOpen}
-                onOpenChange={setConfirmSendDialogOpen}
-            >
-                <AlertDialogContent className="max-w-sm">
-                    <AlertDialogHeader>
-                        <AlertDialogTitle>
-                            {dict.templates.confirmSendTitle ||
-                                "Replace current input?"}
-                        </AlertDialogTitle>
-                        <AlertDialogDescription>
-                            {dict.templates.confirmSendDescription ||
-                                "You have unsent content in the input. Sending this template will replace it."}
-                        </AlertDialogDescription>
-                    </AlertDialogHeader>
-                    <AlertDialogFooter>
-                        <AlertDialogCancel onClick={handleCancelSend}>
-                            {dict.common.cancel}
-                        </AlertDialogCancel>
-                        <AlertDialogAction onClick={handleConfirmSend}>
-                            {dict.templates.confirmSendButton ||
-                                "Send Template"}
-                        </AlertDialogAction>
-                    </AlertDialogFooter>
-                </AlertDialogContent>
-            </AlertDialog>
-        </div>
-    )
-}
@@ -4,11 +4,7 @@ import { Check, ChevronDown, ChevronUp, Copy, Cpu } from "lucide-react"
 import type { Dispatch, SetStateAction } from "react"
 import { CodeBlock } from "@/components/code-block"
 import { isMxCellXmlComplete } from "@/lib/utils"
-import type {
-    DiagramOperation,
-    StructureOperation,
-    ToolPartLike,
-} from "./types"
+import type { DiagramOperation, ToolPartLike } from "./types"

 interface ToolCallCardProps {
    part: ToolPartLike
@@ -23,137 +19,31 @@ interface ToolCallCardProps {
    }
 }

-/**
- * Colour an operation by what it does to the diagram: removes, adds, or changes.
- *
- * Takes an unknown rather than a string because this renders DURING streaming: the tool
- * input arrives character by character, so an operation is briefly `{}` or `{"op": "add_c`
- * before it is whole. A missing name is the normal mid-stream state, not an error.
- */
-function opColour(op: unknown): string {
-    if (typeof op !== "string") return "text-muted-foreground"
-    if (op === "delete" || op === "remove" || op === "unlink" || op === "clear")
-        return "text-red-600"
-    if (op.startsWith("add") || op === "link") return "text-green-600"
-    return "text-blue-600"
-}
-
-/**
- * The arguments worth showing beside an operation's name.
- *
- * A whitelist rather than "everything except op and id", because some operations carry a
- * whole nested graph (add_graph's nodes and edges) and dumping that turns one line into a
- * screenful. The excluded keys are summarised instead.
- */
-const SHOWN_KEYS = [
-    "label",
-    "name",
-    "parent",
-    "dir",
-    "class",
-    "role",
-    "group",
-    "shape",
-    "cols",
-    "lanes",
-    "aspect",
-    "source",
-    "target",
-    "title",
-] as const
-
-function summarise(op: StructureOperation | undefined | null): string {
-    if (!op || typeof op !== "object") return ""
-    const parts: string[] = []
-    for (const key of SHOWN_KEYS) {
-        const v = op[key]
-        if (v === undefined || v === null || v === "") continue
-        parts.push(
-            `${key}=${Array.isArray(v) ? v.join("/") : String(v).slice(0, 60)}`,
-        )
-    }
-    // A graph carries its own nodes and edges; report the size, not the contents.
-    const nodes = op.nodes
-    const edges = op.edges
-    if (Array.isArray(nodes))
-        parts.push(
-            `${nodes.length} node${nodes.length === 1 ? "" : "s"}${
-                Array.isArray(edges)
-                    ? `, ${edges.length} edge${edges.length === 1 ? "" : "s"}`
-                    : ""
-            }`,
-        )
-    return parts.join("  ")
-}
-
-/**
- * `restructure_diagram`'s operations: structural steps, not XML patches.
- *
- * Written to survive PARTIAL data. This renders while the tool input is still streaming, so
- * an entry may be `{}`, or `{op: "add_contai"}`, or — because a JSON array is repaired as it
- * arrives — `undefined`. Every field is therefore treated as possibly absent rather than
- * validated up front: dropping incomplete entries would make rows appear and disappear as
- * the text arrives, and asserting on them crashes the whole message.
- */
-function StructureOperationsDisplay({
-    operations,
-}: {
-    operations: StructureOperation[]
-}) {
-    return (
-        <div className="space-y-1">
-            {operations.map((op, index) => (
-                <div
-                    key={`${op?.op ?? "pending"}-${op?.id ?? index}-${index}`}
-                    className="flex items-baseline gap-2 px-2 py-1 rounded bg-background/50 border border-border/40"
-                >
-                    <span
-                        className={`text-[10px] font-medium uppercase tracking-wide shrink-0 ${opColour(op?.op)}`}
-                    >
-                        {op?.op ?? "…"}
-                    </span>
-                    {op?.id && (
-                        <span className="text-xs font-mono text-foreground/80 shrink-0">
-                            {op.id}
-                        </span>
-                    )}
-                    <span className="text-[11px] text-muted-foreground font-mono break-all">
-                        {summarise(op)}
-                    </span>
-                </div>
-            ))}
-        </div>
-    )
-}
-
-/** `edit_diagram`'s operations. Also streamed, so also written for partial entries. */
 function OperationsDisplay({ operations }: { operations: DiagramOperation[] }) {
    return (
        <div className="space-y-3">
            {operations.map((op, index) => (
                <div
-                    key={`${op?.operation ?? "pending"}-${op?.cell_id ?? index}-${index}`}
+                    key={`${op.operation}-${op.cell_id}-${index}`}
                    className="rounded-lg border border-border/50 overflow-hidden bg-background/50"
                >
                    <div className="px-3 py-1.5 bg-muted/40 border-b border-border/30 flex items-center gap-2">
                        <span
                            className={`text-[10px] font-medium uppercase tracking-wide ${
-                                op?.operation === "delete"
+                                op.operation === "delete"
                                    ? "text-red-600"
-                                    : op?.operation === "add"
+                                    : op.operation === "add"
                                      ? "text-green-600"
                                      : "text-blue-600"
                            }`}
                        >
-                            {op?.operation ?? "…"}
+                            {op.operation}
+                        </span>
+                        <span className="text-xs text-muted-foreground">
+                            cell_id: {op.cell_id}
                        </span>
-                        {op?.cell_id && (
-                            <span className="text-xs text-muted-foreground">
-                                cell_id: {op.cell_id}
-                            </span>
-                        )}
                    </div>
-                    {op?.new_xml && (
+                    {op.new_xml && (
                        <div className="px-3 py-2">
                            <pre className="text-[11px] font-mono text-foreground/80 bg-muted/30 rounded px-2 py-1.5 overflow-x-auto whitespace-pre-wrap break-all">
                                {op.new_xml}
@@ -177,8 +67,8 @@ export function ToolCallCard({
 }: ToolCallCardProps) {
    const callId = part.toolCallId
    const { state, input, output } = part
-    // Default to expanded for all states (user can manually collapse if needed)
-    const isExpanded = expandedTools[callId] ?? true
+    // Default to collapsed if tool is complete, expanded if still streaming
+    const isExpanded = expandedTools[callId] ?? state !== "output-available"
    const toolName = part.type?.replace("tool-", "")
    const isCopied = copiedToolCallId === callId

@@ -191,16 +81,12 @@ export function ToolCallCard({

    const getToolDisplayName = (name: string) => {
        switch (name) {
-            case "restructure_diagram":
-                return "Build Diagram"
-            case "edit_diagram":
-                return "Edit Diagram"
-            case "search_stencils":
-                return "Find Icons"
-            // Only ever arrives from the server's cache-hit path now; the model cannot
-            // call it. See createCachedStreamResponse in app/api/chat/route.ts.
            case "display_diagram":
                return "Generate Diagram"
+            case "edit_diagram":
+                return "Edit Diagram"
+            case "get_shape_library":
+                return "Get Shape Library"
            default:
                return name
        }
@@ -219,6 +105,14 @@ export function ToolCallCard({
            }
        }

+        if (
+            output &&
+            toolName === "get_shape_library" &&
+            typeof output === "string"
+        ) {
+            textToCopy = output
+        }
+
        if (textToCopy) {
            onCopy(callId, textToCopy, true)
        }
@@ -268,11 +162,10 @@ export function ToolCallCard({
                    )}
                    {state === "output-error" &&
                        (() => {
-                            // Truncation only applies to a tool that streams raw XML, which
-                            // is now just the cached-answer replay. The engine tools send
-                            // structured operations, so a failure there is a real error.
+                            // Check if this is a truncation (incomplete XML) vs real error
                            const isTruncated =
-                                toolName === "display_diagram" &&
+                                (toolName === "display_diagram" ||
+                                    toolName === "append_diagram") &&
                                !isMxCellXmlComplete(input?.xml)
                            return isTruncated ? (
                                <span className="text-xs font-medium text-yellow-600 bg-yellow-50 px-2 py-0.5 rounded-full">
@@ -302,42 +195,11 @@ export function ToolCallCard({
            {input && isExpanded && (
                <div className="px-4 py-3 border-t border-border/40 bg-muted/20">
                    {typeof input === "object" && input.xml ? (
-                        state === "input-streaming" ||
-                        state === "input-available" ? (
-                            <pre
-                                className="text-[11px] leading-relaxed overflow-x-auto overflow-y-auto max-h-48 scrollbar-thin break-all whitespace-pre-wrap"
-                                style={{
-                                    fontFamily:
-                                        "var(--font-mono), ui-monospace, monospace",
-                                    margin: 0,
-                                    padding: 0,
-                                }}
-                            >
-                                {input.xml}
-                            </pre>
-                        ) : (
-                            <CodeBlock code={input.xml} language="xml" />
-                        )
+                        <CodeBlock code={input.xml} language="xml" />
                    ) : typeof input === "object" &&
                      input.operations &&
                      Array.isArray(input.operations) ? (
-                        // Dispatch by TOOL, not by whether an `operations` key exists: both
-                        // tools call their argument that, but the items have different shapes
-                        // (op/id versus operation/cell_id), and reading one as the other
-                        // printed a row of blank `cell_id:` labels.
-                        toolName === "restructure_diagram" ? (
-                            <StructureOperationsDisplay
-                                operations={
-                                    input.operations as StructureOperation[]
-                                }
-                            />
-                        ) : (
-                            <OperationsDisplay
-                                operations={
-                                    input.operations as DiagramOperation[]
-                                }
-                            />
-                        )
+                        <OperationsDisplay operations={input.operations} />
                    ) : typeof input === "object" &&
                      Object.keys(input).length > 0 ? (
                        <CodeBlock
@@ -351,7 +213,8 @@ export function ToolCallCard({
                state === "output-error" &&
                (() => {
                    const isTruncated =
-                        toolName === "display_diagram" &&
+                        (toolName === "display_diagram" ||
+                            toolName === "append_diagram") &&
                        !isMxCellXmlComplete(input?.xml)
                    return (
                        <div
@@ -363,21 +226,25 @@ export function ToolCallCard({
                        </div>
                    )
                })()}
-            {/* What the tool actually returned. Worth showing on success, not only on
-                error: restructure_diagram answers with an outline of the structure it
-                built plus any notes about classes it could not honour, and that is the
-                same text the model reads to name ids in its next call. */}
-            {output && state === "output-available" && isExpanded && (
-                <div className="px-4 py-3 border-t border-border/40">
-                    <pre className="text-[11px] font-mono text-muted-foreground bg-muted/40 rounded-md p-2 overflow-auto max-h-64 whitespace-pre-wrap break-all">
-                        {typeof output === "string"
-                            ? output.length > 4000
-                                ? `${output.slice(0, 4000)}\n…`
-                                : output
-                            : String(output)}
-                    </pre>
-                </div>
-            )}
+            {/* Show get_shape_library output on success */}
+            {output &&
+                toolName === "get_shape_library" &&
+                state === "output-available" &&
+                isExpanded && (
+                    <div className="px-4 py-3 border-t border-border/40">
+                        <div className="text-xs text-muted-foreground mb-2">
+                            Library loaded (
+                            {typeof output === "string" ? output.length : 0}{" "}
+                            chars)
+                        </div>
+                        <pre className="text-xs bg-muted/50 p-2 rounded-md overflow-auto max-h-32 whitespace-pre-wrap">
+                            {typeof output === "string"
+                                ? output.substring(0, 800) +
+                                  (output.length > 800 ? "\n..." : "")
+                                : String(output)}
+                        </pre>
+                    </div>
+                )}
        </div>
    )
 }
@@ -1,328 +0,0 @@
-"use client"
-
-import {
-    AlertTriangle,
-    Check,
-    ChevronDown,
-    ChevronUp,
-    Eye,
-    ImageIcon,
-    RefreshCw,
-    X,
-} from "lucide-react"
-import { useState } from "react"
-import Image from "@/components/image-with-basepath"
-import { useDictionary } from "@/hooks/use-dictionary"
-import type { ValidationResult } from "@/lib/diagram-validator"
-
-export type ValidationStatus =
-    | "idle"
-    | "capturing"
-    | "validating"
-    | "success"
-    | "success_with_warnings"
-    | "failed"
-    | "error"
-    | "skipped"
-
-export interface ValidationState {
-    status: ValidationStatus
-    attempt?: number
-    maxAttempts?: number
-    result?: ValidationResult
-    error?: string
-    imageData?: string // Base64 PNG data URL
-}
-
-interface ValidationCardProps {
-    state: ValidationState
-    onImproveWithSuggestions?: (feedback: string) => void
-}
-
-export function ValidationCard({
-    state,
-    onImproveWithSuggestions,
-}: ValidationCardProps) {
-    const dict = useDictionary()
-    const [isExpanded, setIsExpanded] = useState(
-        state.status === "validating" || state.status === "failed",
-    )
-    const [hasRequestedImprovement, setHasRequestedImprovement] =
-        useState(false)
-
-    // Generate improvement feedback from validation result
-    const generateImprovementFeedback = (): string => {
-        if (!state.result) return ""
-
-        const lines: string[] = []
-        lines.push(
-            "Please improve the diagram based on the following visual analysis feedback:",
-        )
-        lines.push("")
-
-        if (state.result.issues.length > 0) {
-            lines.push("Issues to address:")
-            for (const issue of state.result.issues) {
-                lines.push(
-                    `  - [${issue.severity}] ${issue.type}: ${issue.description}`,
-                )
-            }
-            lines.push("")
-        }
-
-        if (state.result.suggestions.length > 0) {
-            lines.push("Suggestions for improvement:")
-            for (const suggestion of state.result.suggestions) {
-                lines.push(`  - ${suggestion}`)
-            }
-            lines.push("")
-        }
-
-        lines.push("Regenerate the diagram with these improvements applied.")
-        return lines.join("\n")
-    }
-
-    const handleImproveClick = () => {
-        if (
-            !onImproveWithSuggestions ||
-            !state.result ||
-            hasRequestedImprovement
-        )
-            return
-        setHasRequestedImprovement(true)
-        const feedback = generateImprovementFeedback()
-        onImproveWithSuggestions(feedback)
-    }
-
-    // Check if we should show the improve button
-    const showImproveButton =
-        onImproveWithSuggestions &&
-        state.result &&
-        (state.status === "success" ||
-            state.status === "success_with_warnings" ||
-            state.status === "skipped") &&
-        (state.result.issues.length > 0 || state.result.suggestions.length > 0)
-
-    const getStatusDisplay = () => {
-        switch (state.status) {
-            case "capturing":
-                return {
-                    label: dict.validation.capturing,
-                    color: "text-blue-600 bg-blue-50",
-                    icon: (
-                        <div className="h-4 w-4 border-2 border-blue-600 border-t-transparent rounded-full animate-spin" />
-                    ),
-                }
-            case "validating":
-                return {
-                    label: state.attempt
-                        ? dict.validation.validatingWithAttempt
-                              .replace("{attempt}", String(state.attempt))
-                              .replace("{max}", String(state.maxAttempts || 3))
-                        : dict.validation.validating,
-                    color: "text-blue-600 bg-blue-50",
-                    icon: (
-                        <div className="h-4 w-4 border-2 border-blue-600 border-t-transparent rounded-full animate-spin" />
-                    ),
-                }
-            case "success":
-                return {
-                    label: dict.validation.valid,
-                    color: "text-green-600 bg-green-50",
-                    icon: <Check className="h-4 w-4" aria-hidden="true" />,
-                }
-            case "success_with_warnings":
-                return {
-                    label: dict.validation.validWithWarnings,
-                    color: "text-amber-600 bg-amber-50",
-                    icon: (
-                        <AlertTriangle className="h-4 w-4" aria-hidden="true" />
-                    ),
-                }
-            case "failed":
-                return {
-                    label: dict.validation.issuesFound,
-                    color: "text-yellow-600 bg-yellow-50",
-                    icon: (
-                        <AlertTriangle className="h-4 w-4" aria-hidden="true" />
-                    ),
-                }
-            case "error":
-                return {
-                    label: dict.validation.error,
-                    color: "text-red-600 bg-red-50",
-                    icon: <X className="h-4 w-4" aria-hidden="true" />,
-                }
-            case "skipped":
-                return {
-                    label: dict.validation.skipped,
-                    color: "text-gray-600 bg-gray-50",
-                    icon: <Check className="h-4 w-4" aria-hidden="true" />,
-                }
-            default:
-                return null
-        }
-    }
-
-    const statusDisplay = getStatusDisplay()
-    if (!statusDisplay || state.status === "idle") return null
-
-    return (
-        <div className="my-3 rounded-xl border border-border/60 bg-muted/30 overflow-hidden">
-            <div className="flex items-center justify-between px-4 py-3 bg-muted/50">
-                <div className="flex items-center gap-2">
-                    <div className="w-6 h-6 rounded-md bg-primary/10 flex items-center justify-center">
-                        <Eye
-                            className="w-3.5 h-3.5 text-primary"
-                            aria-hidden="true"
-                        />
-                    </div>
-                    <span className="text-sm font-medium text-foreground/80">
-                        {dict.validation.title}
-                    </span>
-                </div>
-                <div className="flex items-center gap-2">
-                    <span
-                        className={`text-xs font-medium px-2 py-0.5 rounded-full flex items-center gap-1 ${statusDisplay.color}`}
-                    >
-                        {statusDisplay.icon}
-                        <span className="ml-1">{statusDisplay.label}</span>
-                    </span>
-                    {(state.result || state.error) && (
-                        <button
-                            type="button"
-                            onClick={() => setIsExpanded(!isExpanded)}
-                            className="p-1 rounded hover:bg-muted transition-colors"
-                        >
-                            {isExpanded ? (
-                                <ChevronUp
-                                    className="w-4 h-4 text-muted-foreground"
-                                    aria-hidden="true"
-                                />
-                            ) : (
-                                <ChevronDown
-                                    className="w-4 h-4 text-muted-foreground"
-                                    aria-hidden="true"
-                                />
-                            )}
-                        </button>
-                    )}
-                </div>
-            </div>
-
-            {/* Validation details when expanded */}
-            {isExpanded && (state.result || state.imageData) && (
-                <div className="px-4 py-3 border-t border-border/40 bg-muted/20 space-y-3">
-                    {/* Captured image */}
-                    {state.imageData && (
-                        <div>
-                            <div className="text-xs font-medium text-foreground/70 mb-2 flex items-center gap-1">
-                                <ImageIcon
-                                    className="h-3 w-3"
-                                    aria-hidden="true"
-                                />
-                                {dict.validation.capturedScreenshot}
-                            </div>
-                            <div className="rounded-lg border border-border/50 overflow-hidden bg-white">
-                                <Image
-                                    src={state.imageData}
-                                    alt="Captured diagram for validation"
-                                    width={400}
-                                    height={300}
-                                    className="w-full h-auto max-h-48 object-contain"
-                                    unoptimized
-                                />
-                            </div>
-                        </div>
-                    )}
-
-                    {/* Issues */}
-                    {state.result && state.result.issues.length > 0 && (
-                        <div>
-                            <div className="text-xs font-medium text-foreground/70 mb-2">
-                                {dict.validation.issuesFoundLabel}
-                            </div>
-                            <div className="space-y-2">
-                                {state.result.issues.map((issue, index) => (
-                                    <div
-                                        key={index}
-                                        className={`text-xs px-3 py-2 rounded-lg border ${
-                                            issue.severity === "critical"
-                                                ? "bg-red-50 border-red-200 text-red-700 dark:bg-red-950 dark:border-red-800 dark:text-red-300"
-                                                : "bg-yellow-50 border-yellow-200 text-yellow-700 dark:bg-yellow-950 dark:border-yellow-800 dark:text-yellow-300"
-                                        }`}
-                                    >
-                                        <span className="font-medium uppercase text-[10px] mr-2">
-                                            [{issue.type}]
-                                        </span>
-                                        {issue.description}
-                                    </div>
-                                ))}
-                            </div>
-                        </div>
-                    )}
-
-                    {/* Suggestions */}
-                    {state.result && state.result.suggestions.length > 0 && (
-                        <div>
-                            <div className="text-xs font-medium text-foreground/70 mb-2">
-                                {dict.validation.suggestions}
-                            </div>
-                            <ul className="text-xs text-foreground/60 space-y-1 list-disc list-inside">
-                                {state.result.suggestions.map(
-                                    (suggestion, index) => (
-                                        <li key={index}>{suggestion}</li>
-                                    ),
-                                )}
-                            </ul>
-                        </div>
-                    )}
-
-                    {/* Valid result message */}
-                    {state.result?.valid &&
-                        state.result.issues.length === 0 && (
-                            <div className="text-xs text-green-600 dark:text-green-400">
-                                {dict.validation.passedValidation}
-                            </div>
-                        )}
-                </div>
-            )}
-
-            {/* Improve with Suggestions button - shown when validation passed but has suggestions */}
-            {showImproveButton && (
-                <div className="px-4 py-3 border-t border-border/40 bg-muted/10">
-                    {hasRequestedImprovement ? (
-                        <div className="flex items-center justify-center gap-2 px-4 py-2 text-sm font-medium text-green-600 dark:text-green-400">
-                            <Check className="h-4 w-4" aria-hidden="true" />
-                            {dict.validation.improvementRequested}
-                        </div>
-                    ) : (
-                        <>
-                            <button
-                                type="button"
-                                onClick={handleImproveClick}
-                                className="w-full flex items-center justify-center gap-2 px-4 py-2 text-sm font-medium text-primary bg-primary/10 hover:bg-primary/20 rounded-lg transition-colors"
-                            >
-                                <RefreshCw
-                                    className="h-4 w-4"
-                                    aria-hidden="true"
-                                />
-                                {dict.validation.improveWithSuggestions}
-                            </button>
-                            <p className="text-xs text-muted-foreground mt-2 text-center">
-                                {dict.validation.regenerateWithFeedback}
-                            </p>
-                        </>
-                    )}
-                </div>
-            )}
-
-            {/* Error details when expanded */}
-            {isExpanded && state.error && (
-                <div className="px-4 py-3 border-t border-border/40 bg-red-50/50">
-                    <div className="text-xs text-red-600">{state.error}</div>
-                </div>
-            )}
-        </div>
-    )
-}
@@ -1,38 +1,16 @@
-/** An `edit_diagram` operation: a patch against one cell, addressed by its id. */
 export interface DiagramOperation {
    operation: "update" | "add" | "delete"
    cell_id: string
    new_xml?: string
 }

-/**
- * A `restructure_diagram` operation.
- *
- * Deliberately loose. The engine owns the real schema (lib/diagram-engine/operations.ts)
- * and it has two dozen variants; the card only needs to say WHAT each step did, so it
- * reads the two fields every variant shares and picks a few recognisable extras out of
- * the rest. Mirroring the full union here would mean editing this file every time the
- * engine gains an operation.
- *
- * The field names matter: `op`/`id`, where edit_diagram has `operation`/`cell_id`. Both
- * tools happen to call their argument `operations`, which is what let the card render one
- * as the other and print six blank `cell_id:` lines.
- */
-export interface StructureOperation {
-    op: string
-    id?: string
-    label?: string
-    parent?: string
-    [key: string]: unknown
-}
-
 export interface ToolPartLike {
    type: string
    toolCallId: string
    state?: string
    input?: {
        xml?: string
-        operations?: DiagramOperation[] | StructureOperation[]
+        operations?: DiagramOperation[]
    } & Record<string, unknown>
    output?: string
 }
@@ -1,8 +1,8 @@
 "use client"

 import { FileCode, FileText, Link, Loader2, X } from "lucide-react"
+import Image from "next/image"
 import { useEffect, useRef, useState } from "react"
-import Image from "@/components/image-with-basepath"
 import { useDictionary } from "@/hooks/use-dictionary"
 import { isPdfFile, isTextFile } from "@/lib/pdf-utils"

@@ -1,7 +1,7 @@
 "use client"

+import Image from "next/image"
 import { useState } from "react"
-import Image from "@/components/image-with-basepath"
 import { Button } from "@/components/ui/button"
 import {
    Dialog,
@@ -1,16 +0,0 @@
-import NextImage, { type ImageProps } from "next/image"
-import { forwardRef } from "react"
-import { getAssetUrl } from "@/lib/base-path"
-
-export default forwardRef<HTMLImageElement, ImageProps>(
-    function Image(props, ref) {
-        const src =
-            typeof props.src === "string" &&
-            props.src.startsWith("/") &&
-            !props.src.startsWith("//")
-                ? getAssetUrl(props.src)
-                : props.src
-
-        return <NextImage {...props} src={src} ref={ref} />
-    },
-)
@@ -5,10 +5,8 @@ import {
    Bot,
    Check,
    ChevronDown,
-    Monitor,
    Server,
    Settings2,
-    User,
 } from "lucide-react"
 import { useEffect, useMemo, useRef, useState } from "react"
 import {
@@ -21,27 +19,40 @@ import {
    ModelSelectorLogo,
    ModelSelectorName,
    ModelSelector as ModelSelectorRoot,
-    ModelSelectorSectionHeader,
    ModelSelectorSeparator,
    ModelSelectorTrigger,
 } from "@/components/ai-elements/model-selector"
 import { ButtonWithTooltip } from "@/components/button-with-tooltip"
 import { useDictionary } from "@/hooks/use-dictionary"
-import {
-    type FlattenedModel,
-    PROVIDER_LOGO_MAP,
-} from "@/lib/types/model-config"
+import type { FlattenedModel } from "@/lib/types/model-config"
 import { cn } from "@/lib/utils"

 interface ModelSelectorProps {
    models: FlattenedModel[]
    selectedModelId: string | undefined
    onSelect: (modelId: string | undefined) => void
-    onConfigure?: () => void
+    onConfigure: () => void
    disabled?: boolean
    showUnvalidatedModels?: boolean
 }

+// Map our provider names to models.dev logo names
+const PROVIDER_LOGO_MAP: Record<string, string> = {
+    openai: "openai",
+    anthropic: "anthropic",
+    google: "google",
+    azure: "azure",
+    bedrock: "amazon-bedrock",
+    openrouter: "openrouter",
+    deepseek: "deepseek",
+    siliconflow: "siliconflow",
+    sglang: "openai", // SGLang is OpenAI-compatible, use OpenAI logo
+    gateway: "vercel",
+    edgeone: "tencent-cloud",
+    doubao: "bytedance",
+    modelscope: "modelscope",
+}
+
 // Group models by providerLabel (handles duplicate providers)
 function groupModelsByProvider(
    models: FlattenedModel[],
@@ -51,11 +62,7 @@ function groupModelsByProvider(
        { provider: string; models: FlattenedModel[] }
    >()
    for (const model of models) {
-        // For server models, strip "Server · " prefix for cleaner grouping
-        const key =
-            model.source === "server"
-                ? model.providerLabel.replace(/^Server · /, "")
-                : model.providerLabel
+        const key = model.providerLabel
        const existing = groups.get(key)
        if (existing) {
            existing.models.push(model)
@@ -83,26 +90,10 @@ export function ModelSelector({
        }
        return models.filter((m) => m.validated === true)
    }, [models, showUnvalidatedModels])
-
-    // Separate server and user models
-    const serverModels = useMemo(
-        () => displayModels.filter((m) => m.source === "server"),
+    const groupedModels = useMemo(
+        () => groupModelsByProvider(displayModels),
        [displayModels],
    )
-    const userModels = useMemo(
-        () => displayModels.filter((m) => m.source !== "server"),
-        [displayModels],
-    )
-
-    // Group each category separately
-    const groupedServerModels = useMemo(
-        () => groupModelsByProvider(serverModels),
-        [serverModels],
-    )
-    const groupedUserModels = useMemo(
-        () => groupModelsByProvider(userModels),
-        [userModels],
-    )

    // Find selected model for display
    const selectedModel = useMemo(
@@ -111,7 +102,9 @@ export function ModelSelector({
    )

    const handleSelect = (value: string) => {
-        if (value === "__server_default__") {
+        if (value === "__configure__") {
+            onConfigure()
+        } else if (value === "__server_default__") {
            onSelect(undefined)
        } else {
            onSelect(value)
@@ -158,7 +151,7 @@ export function ModelSelector({
    }, [])

    return (
-        <div ref={wrapperRef} className="min-w-0 max-w-48">
+        <div ref={wrapperRef} className="inline-block">
            <ModelSelectorRoot open={open} onOpenChange={setOpen}>
                <ModelSelectorTrigger asChild>
                    <ButtonWithTooltip
@@ -167,7 +160,7 @@ export function ModelSelector({
                        size="sm"
                        disabled={disabled}
                        className={cn(
-                            "h-8 min-w-0 max-w-full shrink overflow-hidden gap-1.5 px-2 transition-[padding,background-color] duration-150 ease-in-out hover:bg-accent",
+                            "hover:bg-accent gap-1.5 h-8 px-2 transition-all duration-150 ease-in-out",
                            !showLabel && "px-1.5 justify-center",
                        )}
                        // accessibility: expose label to screen readers
@@ -176,7 +169,7 @@ export function ModelSelector({
                        <Bot className="h-4 w-4 flex-shrink-0 text-muted-foreground" />
                        {/* show/hide visible label based on measured width */}
                        {showLabel ? (
-                            <span className="min-w-0 truncate text-xs">
+                            <span className="text-xs truncate">
                                {selectedModel
                                    ? selectedModel.modelId
                                    : dict.modelConfig.default}
@@ -197,241 +190,113 @@ export function ModelSelector({
                    <ModelSelectorInput
                        placeholder={dict.modelConfig.searchModels}
                    />
-                    <div className="flex flex-1 flex-col min-h-0 overflow-hidden">
-                        <div className="flex-1 min-h-0 overflow-hidden">
-                            <ModelSelectorList className="overflow-y-auto scrollbar-thin">
-                                <ModelSelectorEmpty>
-                                    {displayModels.length === 0 &&
-                                    models.length > 0
-                                        ? dict.modelConfig.noVerifiedModels
-                                        : dict.modelConfig.noModelsFound}
-                                </ModelSelectorEmpty>
+                    <ModelSelectorList className="[&::-webkit-scrollbar]:hidden [-ms-overflow-style:none] [scrollbar-width:none]">
+                        <ModelSelectorEmpty>
+                            {displayModels.length === 0 && models.length > 0
+                                ? dict.modelConfig.noVerifiedModels
+                                : dict.modelConfig.noModelsFound}
+                        </ModelSelectorEmpty>

-                                {/* Server Default Option - only show when no server models are configured */}
-                                {serverModels.length === 0 && (
-                                    <ModelSelectorGroup
-                                        heading={dict.modelConfig.default}
-                                    >
+                        {/* Server Default Option */}
+                        <ModelSelectorGroup heading={dict.modelConfig.default}>
+                            <ModelSelectorItem
+                                value="__server_default__"
+                                onSelect={handleSelect}
+                                className={cn(
+                                    "cursor-pointer",
+                                    !selectedModelId && "bg-accent",
+                                )}
+                            >
+                                <Check
+                                    className={cn(
+                                        "mr-2 h-4 w-4",
+                                        !selectedModelId
+                                            ? "opacity-100"
+                                            : "opacity-0",
+                                    )}
+                                />
+                                <Server className="mr-2 h-4 w-4 text-muted-foreground" />
+                                <ModelSelectorName>
+                                    {dict.modelConfig.serverDefault}
+                                </ModelSelectorName>
+                            </ModelSelectorItem>
+                        </ModelSelectorGroup>
+
+                        {/* Configured Models by Provider */}
+                        {Array.from(groupedModels.entries()).map(
+                            ([
+                                providerLabel,
+                                { provider, models: providerModels },
+                            ]) => (
+                                <ModelSelectorGroup
+                                    key={providerLabel}
+                                    heading={providerLabel}
+                                >
+                                    {providerModels.map((model) => (
                                        <ModelSelectorItem
-                                            value="__server_default__"
-                                            onSelect={handleSelect}
-                                            className={cn(
-                                                "cursor-pointer",
-                                                !selectedModelId && "bg-accent",
-                                            )}
+                                            key={model.id}
+                                            value={model.modelId}
+                                            onSelect={() =>
+                                                handleSelect(model.id)
+                                            }
+                                            className="cursor-pointer"
                                        >
                                            <Check
                                                className={cn(
                                                    "mr-2 h-4 w-4",
-                                                    !selectedModelId
+                                                    selectedModelId === model.id
                                                        ? "opacity-100"
                                                        : "opacity-0",
                                                )}
                                            />
-                                            <Server className="mr-2 h-4 w-4 text-muted-foreground" />
+                                            <ModelSelectorLogo
+                                                provider={
+                                                    PROVIDER_LOGO_MAP[
+                                                        provider
+                                                    ] || provider
+                                                }
+                                                className="mr-2"
+                                            />
                                            <ModelSelectorName>
-                                                {dict.modelConfig.serverDefault}
+                                                {model.modelId}
                                            </ModelSelectorName>
+                                            {model.validated !== true && (
+                                                <span
+                                                    title={
+                                                        dict.modelConfig
+                                                            .unvalidatedModelWarning
+                                                    }
+                                                >
+                                                    <AlertTriangle className="ml-auto h-3 w-3 text-warning" />
+                                                </span>
+                                            )}
                                        </ModelSelectorItem>
-                                    </ModelSelectorGroup>
-                                )}
+                                    ))}
+                                </ModelSelectorGroup>
+                            ),
+                        )}

-                                {/* Server Models Section */}
-                                {serverModels.length > 0 && (
-                                    <>
-                                        <ModelSelectorSectionHeader
-                                            icon={<Monitor />}
-                                            label={
-                                                dict.modelConfig.serverModels
-                                            }
-                                        />
-                                        {Array.from(
-                                            groupedServerModels.entries(),
-                                        ).map(
-                                            ([
-                                                providerLabel,
-                                                {
-                                                    provider,
-                                                    models: providerModels,
-                                                },
-                                            ]) => (
-                                                <ModelSelectorGroup
-                                                    key={`server-${providerLabel}`}
-                                                    heading={providerLabel}
-                                                    className="[&>[cmdk-group-heading]]:pl-4"
-                                                >
-                                                    {providerModels.map(
-                                                        (model) => (
-                                                            <ModelSelectorItem
-                                                                key={model.id}
-                                                                value={
-                                                                    model.modelId
-                                                                }
-                                                                onSelect={() =>
-                                                                    handleSelect(
-                                                                        model.id,
-                                                                    )
-                                                                }
-                                                                className="cursor-pointer"
-                                                            >
-                                                                <Check
-                                                                    className={cn(
-                                                                        "mr-2 h-4 w-4",
-                                                                        selectedModelId ===
-                                                                            model.id
-                                                                            ? "opacity-100"
-                                                                            : "opacity-0",
-                                                                    )}
-                                                                />
-                                                                <ModelSelectorLogo
-                                                                    provider={
-                                                                        PROVIDER_LOGO_MAP[
-                                                                            provider
-                                                                        ] ||
-                                                                        provider
-                                                                    }
-                                                                    className="mr-2"
-                                                                />
-                                                                <ModelSelectorName>
-                                                                    {
-                                                                        model.modelId
-                                                                    }
-                                                                </ModelSelectorName>
-                                                                {model.isDefault && (
-                                                                    <span
-                                                                        title={
-                                                                            dict
-                                                                                .modelConfig
-                                                                                .serverDefaultModel
-                                                                        }
-                                                                        className="ml-auto text-xs text-muted-foreground"
-                                                                    >
-                                                                        {
-                                                                            dict
-                                                                                .modelConfig
-                                                                                .default
-                                                                        }
-                                                                    </span>
-                                                                )}
-                                                            </ModelSelectorItem>
-                                                        ),
-                                                    )}
-                                                </ModelSelectorGroup>
-                                            ),
-                                        )}
-                                    </>
-                                )}
-
-                                {/* User Models Section */}
-                                {userModels.length > 0 && (
-                                    <>
-                                        {serverModels.length > 0 && (
-                                            <ModelSelectorSeparator />
-                                        )}
-                                        <ModelSelectorSectionHeader
-                                            icon={<User />}
-                                            label={dict.modelConfig.userModels}
-                                        />
-                                        {Array.from(
-                                            groupedUserModels.entries(),
-                                        ).map(
-                                            ([
-                                                providerLabel,
-                                                {
-                                                    provider,
-                                                    models: providerModels,
-                                                },
-                                            ]) => (
-                                                <ModelSelectorGroup
-                                                    key={`user-${providerLabel}`}
-                                                    heading={providerLabel}
-                                                    className="[&>[cmdk-group-heading]]:pl-4"
-                                                >
-                                                    {providerModels.map(
-                                                        (model) => (
-                                                            <ModelSelectorItem
-                                                                key={model.id}
-                                                                value={
-                                                                    model.modelId
-                                                                }
-                                                                onSelect={() =>
-                                                                    handleSelect(
-                                                                        model.id,
-                                                                    )
-                                                                }
-                                                                className="cursor-pointer"
-                                                            >
-                                                                <Check
-                                                                    className={cn(
-                                                                        "mr-2 h-4 w-4",
-                                                                        selectedModelId ===
-                                                                            model.id
-                                                                            ? "opacity-100"
-                                                                            : "opacity-0",
-                                                                    )}
-                                                                />
-                                                                <ModelSelectorLogo
-                                                                    provider={
-                                                                        PROVIDER_LOGO_MAP[
-                                                                            provider
-                                                                        ] ||
-                                                                        provider
-                                                                    }
-                                                                    className="mr-2"
-                                                                />
-                                                                <ModelSelectorName>
-                                                                    {
-                                                                        model.modelId
-                                                                    }
-                                                                </ModelSelectorName>
-                                                                {model.validated !==
-                                                                    true && (
-                                                                    <span
-                                                                        title={
-                                                                            dict
-                                                                                .modelConfig
-                                                                                .unvalidatedModelWarning
-                                                                        }
-                                                                    >
-                                                                        <AlertTriangle className="ml-auto h-3 w-3 text-warning" />
-                                                                    </span>
-                                                                )}
-                                                            </ModelSelectorItem>
-                                                        ),
-                                                    )}
-                                                </ModelSelectorGroup>
-                                            ),
-                                        )}
-                                    </>
-                                )}
-                            </ModelSelectorList>
+                        {/* Configure Option */}
+                        <ModelSelectorSeparator />
+                        <ModelSelectorGroup>
+                            <ModelSelectorItem
+                                value="__configure__"
+                                onSelect={handleSelect}
+                                className="cursor-pointer"
+                            >
+                                <Settings2 className="mr-2 h-4 w-4" />
+                                <ModelSelectorName>
+                                    {dict.modelConfig.configureModels}
+                                </ModelSelectorName>
+                            </ModelSelectorItem>
+                        </ModelSelectorGroup>
+                        {/* Info text */}
+                        <div className="px-3 py-2 text-xs text-muted-foreground border-t">
+                            {showUnvalidatedModels
+                                ? dict.modelConfig.allModelsShown
+                                : dict.modelConfig.onlyVerifiedShown}
                        </div>
-                        {/* Pinned footer: Configure Models... + info text (z-10 above list shadow) */}
-                        <div className="relative z-10 shrink-0 border-t bg-background">
-                            {onConfigure && (
-                                <div className="px-3 py-2">
-                                    <ModelSelectorItem
-                                        value="__configure_models__"
-                                        onSelect={() => {
-                                            onConfigure()
-                                            setOpen(false)
-                                        }}
-                                        className="flex cursor-pointer items-center gap-2 rounded-sm"
-                                    >
-                                        <Settings2 className="h-4 w-4 shrink-0 text-muted-foreground" />
-                                        <ModelSelectorName>
-                                            {dict.modelConfig.configureModels}
-                                        </ModelSelectorName>
-                                    </ModelSelectorItem>
-                                </div>
-                            )}
-                            <div className="px-3 pb-2 text-xs text-muted-foreground">
-                                {showUnvalidatedModels
-                                    ? dict.modelConfig.allModelsShown
-                                    : dict.modelConfig.onlyVerifiedShown}
-                            </div>
-                        </div>
-                    </div>
+                    </ModelSelectorList>
                </ModelSelectorContent>
            </ModelSelectorRoot>
        </div>
@@ -1,264 +0,0 @@
-"use client"
-
-import { Key, Link2, Tag } from "lucide-react"
-import type { ReactNode } from "react"
-import { Input } from "@/components/ui/input"
-import { Label } from "@/components/ui/label"
-import {
-    Select,
-    SelectContent,
-    SelectItem,
-    SelectTrigger,
-    SelectValue,
-} from "@/components/ui/select"
-import { useDictionary } from "@/hooks/use-dictionary"
-import { formatMessage } from "@/lib/i18n/utils"
-import { PROVIDER_INFO, type ProviderName } from "@/lib/types/model-config"
-
-// Logical secret field. The caller owns the actual input — plaintext for the
-// user dialog, write-only masked for the admin panel — supplied via
-// renderSecret. That (and the optional test action) are the only genuine
-// differences between the two screens; the field structure is shared here.
-export type SecretField =
-    | "apiKey"
-    | "awsAccessKeyId"
-    | "awsSecretAccessKey"
-    | "vertexApiKey"
-
-// AWS regions offered for Bedrock (shared by both screens)
-const AWS_REGIONS: Array<[string, string]> = [
-    ["us-east-1", "N. Virginia"],
-    ["us-east-2", "Ohio"],
-    ["us-west-2", "Oregon"],
-    ["eu-west-1", "Ireland"],
-    ["eu-west-2", "London"],
-    ["eu-west-3", "Paris"],
-    ["eu-central-1", "Frankfurt"],
-    ["ap-south-1", "Mumbai"],
-    ["ap-northeast-1", "Tokyo"],
-    ["ap-northeast-2", "Seoul"],
-    ["ap-southeast-1", "Singapore"],
-    ["ap-southeast-2", "Sydney"],
-    ["sa-east-1", "São Paulo"],
-]
-
-interface ProviderCredentialsFieldsProps {
-    provider: ProviderName
-    // Plain (non-secret) field values — secrets are owned by renderSecret
-    name?: string
-    baseUrl?: string
-    awsRegion?: string
-    disabled?: boolean
-    // Update a plain text field
-    onChange: (field: "name" | "baseUrl" | "awsRegion", value: string) => void
-    // Render the control for a secret field. The caller may include trailing
-    // UI (e.g. the user dialog's inline Test button + validation error); the
-    // shared component only supplies the label above it.
-    renderSecret: (opts: { field: SecretField; id: string }) => ReactNode
-    // Extra content after the fields — used for the Bedrock test row and the
-    // EdgeOne test button, which aren't beside a credential input.
-    footer?: ReactNode
-}
-
-// Display name + per-provider credential inputs, shared by the user
-// ModelConfigDialog and the admin Models panel.
-export function ProviderCredentialsFields({
-    provider,
-    name,
-    baseUrl,
-    awsRegion,
-    disabled,
-    onChange,
-    renderSecret,
-    footer,
-}: ProviderCredentialsFieldsProps) {
-    const dict = useDictionary()
-    const info = PROVIDER_INFO[provider]
-    const baseUrlLabel = formatMessage(dict.modelConfig.baseUrlWithExample, {
-        example: info.defaultBaseUrl || "https://api.example.com/v1",
-    })
-
-    // EdgeOne needs no credentials — the caller supplies just a test button
-    if (provider === "edgeone") {
-        return <div className="space-y-5">{footer}</div>
-    }
-
-    return (
-        <div className="space-y-5">
-            {/* Display Name */}
-            <div className="space-y-2">
-                <Label
-                    htmlFor="provider-name"
-                    className="text-xs font-medium flex items-center gap-1.5"
-                >
-                    <Tag className="h-3.5 w-3.5 text-muted-foreground" />
-                    {dict.modelConfig.displayName}
-                </Label>
-                <Input
-                    id="provider-name"
-                    value={name ?? ""}
-                    disabled={disabled}
-                    onChange={(e) => onChange("name", e.target.value)}
-                    placeholder={info.label}
-                    className="h-9"
-                />
-            </div>
-
-            {provider === "bedrock" ? (
-                <>
-                    {/* AWS Access Key ID */}
-                    <div className="space-y-2">
-                        <Label
-                            htmlFor="aws-access-key-id"
-                            className="text-xs font-medium flex items-center gap-1.5"
-                        >
-                            <Key className="h-3.5 w-3.5 text-muted-foreground" />
-                            {dict.modelConfig.awsAccessKeyId}
-                        </Label>
-                        {renderSecret({
-                            field: "awsAccessKeyId",
-                            id: "aws-access-key-id",
-                        })}
-                    </div>
-
-                    {/* AWS Secret Access Key */}
-                    <div className="space-y-2">
-                        <Label
-                            htmlFor="aws-secret-access-key"
-                            className="text-xs font-medium flex items-center gap-1.5"
-                        >
-                            <Key className="h-3.5 w-3.5 text-muted-foreground" />
-                            {dict.modelConfig.awsSecretAccessKey}
-                        </Label>
-                        {renderSecret({
-                            field: "awsSecretAccessKey",
-                            id: "aws-secret-access-key",
-                        })}
-                    </div>
-
-                    {/* AWS Region */}
-                    <div className="space-y-2">
-                        <Label
-                            htmlFor="aws-region"
-                            className="text-xs font-medium flex items-center gap-1.5"
-                        >
-                            <Link2 className="h-3.5 w-3.5 text-muted-foreground" />
-                            {dict.modelConfig.awsRegion}
-                        </Label>
-                        <Select
-                            value={awsRegion || ""}
-                            disabled={disabled}
-                            onValueChange={(v) => onChange("awsRegion", v)}
-                        >
-                            <SelectTrigger
-                                id="aws-region"
-                                className="h-9 font-mono text-xs hover:bg-accent"
-                            >
-                                <SelectValue
-                                    placeholder={dict.modelConfig.selectRegion}
-                                />
-                            </SelectTrigger>
-                            <SelectContent className="max-h-64">
-                                {AWS_REGIONS.map(([region, label]) => (
-                                    <SelectItem key={region} value={region}>
-                                        {region} ({label})
-                                    </SelectItem>
-                                ))}
-                            </SelectContent>
-                        </Select>
-                    </div>
-                </>
-            ) : provider === "vertexai" ? (
-                <>
-                    {/* Vertex AI API Key (Express Mode) */}
-                    <div className="space-y-2">
-                        <Label
-                            htmlFor="vertex-api-key"
-                            className="text-xs font-medium flex items-center gap-1.5"
-                        >
-                            <Key className="h-3.5 w-3.5 text-muted-foreground" />
-                            {dict.modelConfig.apiKey}
-                        </Label>
-                        {renderSecret({
-                            field: "vertexApiKey",
-                            id: "vertex-api-key",
-                        })}
-                    </div>
-
-                    {/* Base URL (optional) */}
-                    <div className="space-y-2">
-                        <Label
-                            htmlFor="vertex-base-url"
-                            className="text-xs font-medium flex items-center gap-1.5"
-                        >
-                            <Link2 className="h-3.5 w-3.5 text-muted-foreground" />
-                            {baseUrlLabel}
-                        </Label>
-                        <Input
-                            id="vertex-base-url"
-                            value={baseUrl ?? ""}
-                            disabled={disabled}
-                            onChange={(e) =>
-                                onChange("baseUrl", e.target.value)
-                            }
-                            placeholder={dict.modelConfig.customEndpoint}
-                            className="h-9 font-mono text-xs"
-                        />
-                    </div>
-                </>
-            ) : (
-                <>
-                    {/* API Key */}
-                    <div className="space-y-2">
-                        <Label
-                            htmlFor="api-key"
-                            className="text-xs font-medium flex items-center gap-1.5"
-                        >
-                            <Key className="h-3.5 w-3.5 text-muted-foreground" />
-                            {dict.modelConfig.apiKey}
-                            {provider === "ollama" &&
-                                ` ${dict.modelConfig.optional}`}
-                        </Label>
-                        {renderSecret({ field: "apiKey", id: "api-key" })}
-                    </div>
-
-                    {/* Base URL */}
-                    <div className="space-y-2">
-                        <Label
-                            htmlFor="base-url"
-                            className="text-xs font-medium flex items-center gap-1.5"
-                        >
-                            <Link2 className="h-3.5 w-3.5 text-muted-foreground" />
-                            {baseUrlLabel}
-                        </Label>
-                        <Input
-                            id="base-url"
-                            value={baseUrl ?? ""}
-                            disabled={disabled}
-                            onChange={(e) =>
-                                onChange("baseUrl", e.target.value)
-                            }
-                            placeholder={
-                                info.defaultBaseUrl ||
-                                dict.modelConfig.customEndpoint
-                            }
-                            className="h-9 rounded-xl font-mono text-xs"
-                        />
-                        {provider === "minimax" && (
-                            <p className="text-xs text-muted-foreground">
-                                {dict.modelConfig.minimaxBaseUrlHint}
-                            </p>
-                        )}
-                        {provider === "mimo" && (
-                            <p className="text-xs text-muted-foreground">
-                                {dict.modelConfig.mimoBaseUrlHint}
-                            </p>
-                        )}
-                    </div>
-                </>
-            )}
-
-            {footer}
-        </div>
-    )
-}
@@ -1,36 +0,0 @@
-import { Cloud, Server, Sparkles } from "lucide-react"
-import { PROVIDER_LOGO_MAP, type ProviderName } from "@/lib/types/model-config"
-import { cn } from "@/lib/utils"
-
-// Provider logo from models.dev, with Lucide fallbacks for providers
-// that have no logo there
-export function ProviderLogo({
-    provider,
-    className,
-}: {
-    provider: ProviderName
-    className?: string
-}) {
-    if (provider === "bedrock") {
-        return <Cloud className={cn("size-4", className)} />
-    }
-    if (provider === "sglang") {
-        return <Server className={cn("size-4", className)} />
-    }
-    if (provider === "doubao") {
-        return <Sparkles className={cn("size-4", className)} />
-    }
-
-    const logoName = PROVIDER_LOGO_MAP[provider] || provider
-    return (
-        // biome-ignore lint/performance/noImgElement: External URL from models.dev
-        <img
-            alt=""
-            aria-hidden="true"
-            className={cn("size-4 dark:invert", className)}
-            height={16}
-            src={`https://models.dev/logos/${logoName}.svg`}
-            width={16}
-        />
-    )
-}
@@ -23,22 +23,9 @@ export function QuotaLimitToast({
 }: QuotaLimitToastProps) {
    const dict = useDictionary()
    const isTokenLimit = type === "token"
-    const isSelfHosted = process.env.NEXT_PUBLIC_SELFHOSTED === "true"
    const formatNumber = (n: number) =>
        n >= 1000 ? `${(n / 1000).toFixed(1)}k` : n.toString()

-    const quotaMessage = isTokenLimit
-        ? isSelfHosted
-            ? (dict.quota.messageTokenSelfHosted ?? dict.quota.messageToken)
-            : dict.quota.messageToken
-        : isSelfHosted
-          ? (dict.quota.messageApiSelfHosted ?? dict.quota.messageApi)
-          : dict.quota.messageApi
-
-    const tipHtml = isSelfHosted
-        ? (dict.quota.tipSelfHosted ?? dict.quota.tip)
-        : dict.quota.tip
-
    const handleKeyDown = (e: React.KeyboardEvent) => {
        if (e.key === "Escape") {
            e.preventDefault()
@@ -84,24 +71,19 @@ export function QuotaLimitToast({
            </div>
            {/* Message */}
            <div className="text-sm text-muted-foreground leading-relaxed mb-4 space-y-2">
-                <p>{quotaMessage}</p>
-                {!isSelfHosted && (
-                    <p
-                        dangerouslySetInnerHTML={{
-                            __html: formatMessage(
-                                dict.quota.doubaoSponsorship,
-                                {
-                                    link: "https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio",
-                                },
-                            ),
-                        }}
-                    />
-                )}
+                <p>
+                    {isTokenLimit
+                        ? dict.quota.messageToken
+                        : dict.quota.messageApi}
+                </p>
                <p
                    dangerouslySetInnerHTML={{
-                        __html: tipHtml,
+                        __html: formatMessage(dict.quota.doubaoSponsorship, {
+                            link: "https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project",
+                        }),
                    }}
                />
+                <p dangerouslySetInnerHTML={{ __html: dict.quota.tip }} />
                <p>{dict.quota.reset}</p>
            </div>{" "}
            {/* Action buttons */}
@@ -119,28 +101,24 @@ export function QuotaLimitToast({
                        {dict.quota.configModel}
                    </button>
                )}
-                {!isSelfHosted && (
-                    <>
-                        <a
-                            href="https://github.com/DayuanJiang/next-ai-draw-io"
-                            target="_blank"
-                            rel="noopener noreferrer"
-                            className="inline-flex items-center gap-1.5 px-3 py-1.5 text-xs font-medium rounded-lg border border-border text-foreground hover:bg-muted transition-colors"
-                        >
-                            <FaGithub className="w-3.5 h-3.5" />
-                            {dict.quota.selfHost}
-                        </a>
-                        <a
-                            href="https://github.com/sponsors/DayuanJiang"
-                            target="_blank"
-                            rel="noopener noreferrer"
-                            className="inline-flex items-center gap-1.5 px-3 py-1.5 text-xs font-medium rounded-lg border border-border text-foreground hover:bg-muted transition-colors"
-                        >
-                            <Coffee className="w-3.5 h-3.5" />
-                            {dict.quota.sponsor}
-                        </a>
-                    </>
-                )}
+                <a
+                    href="https://github.com/DayuanJiang/next-ai-draw-io"
+                    target="_blank"
+                    rel="noopener noreferrer"
+                    className="inline-flex items-center gap-1.5 px-3 py-1.5 text-xs font-medium rounded-lg border border-border text-foreground hover:bg-muted transition-colors"
+                >
+                    <FaGithub className="w-3.5 h-3.5" />
+                    {dict.quota.selfHost}
+                </a>
+                <a
+                    href="https://github.com/sponsors/DayuanJiang"
+                    target="_blank"
+                    rel="noopener noreferrer"
+                    className="inline-flex items-center gap-1.5 px-3 py-1.5 text-xs font-medium rounded-lg border border-border text-foreground hover:bg-muted transition-colors"
+                >
+                    <Coffee className="w-3.5 h-3.5" />
+                    {dict.quota.sponsor}
+                </a>
            </div>
        </div>
    )
@@ -20,7 +20,7 @@ import {
 } from "@/components/ui/select"
 import { useDictionary } from "@/hooks/use-dictionary"

-export type ExportFormat = "drawio" | "png" | "svg" | "xmlsvg"
+export type ExportFormat = "drawio" | "png" | "svg"

 interface SaveDialogProps {
    open: boolean
@@ -74,11 +74,6 @@ export function SaveDialog({
            label: dict.save.formats.svg,
            extension: ".svg",
        },
-        {
-            value: "xmlsvg" as const,
-            label: dict.save.formats.xmlsvg,
-            extension: ".drawio.svg",
-        },
    ]

    const currentFormat = FORMAT_OPTIONS.find((f) => f.value === format)
@@ -1,8 +1,8 @@
 "use client"

-import { ChevronRight, Github, Info, Moon, Sun, Tag } from "lucide-react"
+import { Github, Info, Moon, Sun, Tag } from "lucide-react"
 import { usePathname, useRouter, useSearchParams } from "next/navigation"
-import { Suspense, useCallback, useEffect, useState } from "react"
+import { Suspense, useEffect, useState } from "react"
 import { toast } from "sonner"
 import { Button } from "@/components/ui/button"
 import {
@@ -22,12 +22,9 @@ import {
    SelectValue,
 } from "@/components/ui/select"
 import { Switch } from "@/components/ui/switch"
-import { Textarea } from "@/components/ui/textarea"
 import { useDictionary } from "@/hooks/use-dictionary"
 import { getApiEndpoint } from "@/lib/base-path"
-import type { DrawioTheme } from "@/lib/drawio-themes"
 import { i18n, type Locale } from "@/lib/i18n/config"
-import { STORAGE_KEYS } from "@/lib/storage"

 // Reusable setting item component for consistent layout
 function SettingItem({
@@ -58,26 +55,22 @@ const LANGUAGE_LABELS: Record<Locale, string> = {
    en: "English",
    zh: "中文",
    ja: "日本語",
-    "zh-Hant": "繁體中文",
 }

 interface SettingsDialogProps {
    open: boolean
    onOpenChange: (open: boolean) => void
-    drawioUi: DrawioTheme
-    onDrawioUiChange: (theme: DrawioTheme) => void
+    onCloseProtectionChange?: (enabled: boolean) => void
+    drawioUi: "min" | "sketch"
+    onToggleDrawioUi: () => void
    darkMode: boolean
    onToggleDarkMode: () => void
    minimalStyle?: boolean
    onMinimalStyleChange?: (value: boolean) => void
-    vlmValidationEnabled?: boolean
-    onVlmValidationChange?: (value: boolean) => void
-    onOpenModelConfig?: () => void
-    customSystemMessage?: string
-    onCustomSystemMessageChange?: (value: string) => void
 }

 export const STORAGE_ACCESS_CODE_KEY = "next-ai-draw-io-access-code"
+export const STORAGE_CLOSE_PROTECTION_KEY = "next-ai-draw-io-close-protection"
 const STORAGE_ACCESS_CODE_REQUIRED_KEY = "next-ai-draw-io-access-code-required"

 function getStoredAccessCodeRequired(): boolean | null {
@@ -90,44 +83,26 @@ function getStoredAccessCodeRequired(): boolean | null {
 function SettingsContent({
    open,
    onOpenChange,
+    onCloseProtectionChange,
    drawioUi,
-    onDrawioUiChange,
+    onToggleDrawioUi,
    darkMode,
    onToggleDarkMode,
    minimalStyle = false,
    onMinimalStyleChange = () => {},
-    vlmValidationEnabled = false,
-    onVlmValidationChange = () => {},
-    onOpenModelConfig,
-    customSystemMessage = "",
-    onCustomSystemMessageChange = () => {},
 }: SettingsDialogProps) {
    const dict = useDictionary()
    const router = useRouter()
    const pathname = usePathname() || "/"
    const search = useSearchParams()
    const [accessCode, setAccessCode] = useState("")
+    const [closeProtection, setCloseProtection] = useState(true)
    const [isVerifying, setIsVerifying] = useState(false)
    const [error, setError] = useState("")
    const [accessCodeRequired, setAccessCodeRequired] = useState(
        () => getStoredAccessCodeRequired() ?? false,
    )
    const [currentLang, setCurrentLang] = useState("en")
-    const [sendShortcut, setSendShortcut] = useState("ctrl-enter")
-
-    // Panel visibility state
-    const [showRecentChats, setShowRecentChats] = useState(true)
-    const [showMyTemplates, setShowMyTemplates] = useState(true)
-    const [showQuickExamples, setShowQuickExamples] = useState(true)
-
-    const handlePanelToggle = useCallback(
-        (key: string, value: boolean, setter: (v: boolean) => void) => {
-            setter(value)
-            localStorage.setItem(key, String(value))
-            window.dispatchEvent(new CustomEvent("panelVisibilityChange"))
-        },
-        [],
-    )

    // Proxy settings state (Electron only)
    const [httpProxy, setHttpProxy] = useState("")
@@ -135,11 +110,8 @@ function SettingsContent({
    const [isApplyingProxy, setIsApplyingProxy] = useState(false)

    useEffect(() => {
-        // Re-fetch config whenever the dialog opens to ensure we always show
-        // the access code input if the server requires it. This fixes the case
-        // where a stale localStorage cache (from before ACCESS_CODE_LIST was
-        // configured) would hide the access code input.
-        if (!open) return
+        // Only fetch if not cached in localStorage
+        if (getStoredAccessCodeRequired() !== null) return

        fetch(getApiEndpoint("/api/config"))
            .then((res) => {
@@ -155,9 +127,10 @@ function SettingsContent({
                setAccessCodeRequired(required)
            })
            .catch(() => {
-                // Keep existing cached value on error
+                // Don't cache on error - allow retry on next mount
+                setAccessCodeRequired(false)
            })
-    }, [open])
+    }, [])

    // Detect current language from pathname
    useEffect(() => {
@@ -176,21 +149,11 @@ function SettingsContent({
                localStorage.getItem(STORAGE_ACCESS_CODE_KEY) || ""
            setAccessCode(storedCode)

-            const storedSendShortcut = localStorage.getItem(
-                STORAGE_KEYS.sendShortcut,
-            )
-            setSendShortcut(storedSendShortcut || "ctrl-enter")
-
-            setShowRecentChats(
-                localStorage.getItem(STORAGE_KEYS.showRecentChats) !== "false",
-            )
-            setShowMyTemplates(
-                localStorage.getItem(STORAGE_KEYS.showMyTemplates) !== "false",
-            )
-            setShowQuickExamples(
-                localStorage.getItem(STORAGE_KEYS.showQuickExamples) !==
-                    "false",
+            const storedCloseProtection = localStorage.getItem(
+                STORAGE_CLOSE_PROTECTION_KEY,
            )
+            // Default to true if not set
+            setCloseProtection(storedCloseProtection !== "false")

            setError("")

@@ -208,13 +171,6 @@ function SettingsContent({
        // Save locale to localStorage for persistence across restarts
        localStorage.setItem("next-ai-draw-io-locale", lang)

-        // Notify Electron main process to update its menu language
-        if (window.electronAPI?.setUserLocale) {
-            window.electronAPI.setUserLocale(lang).catch((error) => {
-                console.error("Failed to sync locale with Electron:", error)
-            })
-        }
-
        const parts = pathname.split("/")
        if (parts.length > 1 && i18n.locales.includes(parts[1] as Locale)) {
            parts[1] = lang
@@ -307,7 +263,7 @@ function SettingsContent({
    }

    return (
-        <DialogContent className="sm:max-w-lg p-0 gap-0 max-h-[90vh] flex flex-col overflow-hidden">
+        <DialogContent className="sm:max-w-lg p-0 gap-0">
            {/* Header */}
            <DialogHeader className="px-6 pt-6 pb-4">
                <DialogTitle>{dict.settings.title}</DialogTitle>
@@ -317,29 +273,8 @@ function SettingsContent({
            </DialogHeader>

            {/* Content */}
-            <div className="px-6 pb-6 overflow-y-auto flex-1 scrollbar-thin">
+            <div className="px-6 pb-6">
                <div className="divide-y divide-border-subtle">
-                    {/* API Keys & Models */}
-                    {onOpenModelConfig && (
-                        <SettingItem
-                            label={dict.settings.apiKeysModels}
-                            description={dict.settings.apiKeysModelsDescription}
-                        >
-                            <Button
-                                variant="ghost"
-                                size="sm"
-                                className="h-9 w-9 p-0"
-                                onClick={() => {
-                                    onOpenChange(false)
-                                    onOpenModelConfig()
-                                }}
-                                aria-label={dict.settings.apiKeysModels}
-                            >
-                                <ChevronRight className="h-4 w-4" />
-                            </Button>
-                        </SettingItem>
-                    )}
-
                    {/* Access Code (conditional) */}
                    {accessCodeRequired && (
                        <div className="py-4 first:pt-0 space-y-3">
@@ -433,40 +368,42 @@ function SettingsContent({
                    {/* Draw.io Style */}
                    <SettingItem
                        label={dict.settings.drawioStyle}
-                        description={dict.settings.drawioStyleDescription}
+                        description={`${dict.settings.drawioStyleDescription} ${
+                            drawioUi === "min"
+                                ? dict.settings.minimal
+                                : dict.settings.sketch
+                        }`}
                    >
-                        <Select
-                            value={drawioUi}
-                            onValueChange={(v) =>
-                                onDrawioUiChange(v as DrawioTheme)
-                            }
+                        <Button
+                            id="drawio-ui"
+                            variant="outline"
+                            onClick={onToggleDrawioUi}
+                            className="h-9 w-[120px] rounded-xl border-border-subtle hover:bg-interactive-hover font-normal"
                        >
-                            <SelectTrigger
-                                id="drawio-ui-select"
-                                aria-label={dict.settings.drawioStyle}
-                                className="w-[120px] h-9 rounded-xl"
-                            >
-                                <SelectValue />
-                            </SelectTrigger>
-                            <SelectContent>
-                                <SelectItem value="kennedy">
-                                    {dict.settings.themeDefault}
-                                </SelectItem>
-                                <SelectItem value="atlas">Atlas</SelectItem>
-                                <SelectItem value="dark">
-                                    {dict.settings.themeDark}
-                                </SelectItem>
-                                <SelectItem value="min">
-                                    {dict.settings.themeMinimal}
-                                </SelectItem>
-                                <SelectItem value="sketch">
-                                    {dict.settings.themeSketch}
-                                </SelectItem>
-                                <SelectItem value="simple">
-                                    {dict.settings.themeSimple}
-                                </SelectItem>
-                            </SelectContent>
-                        </Select>
+                            {dict.settings.switchTo}{" "}
+                            {drawioUi === "min"
+                                ? dict.settings.sketch
+                                : dict.settings.minimal}
+                        </Button>
+                    </SettingItem>
+
+                    {/* Close Protection */}
+                    <SettingItem
+                        label={dict.settings.closeProtection}
+                        description={dict.settings.closeProtectionDescription}
+                    >
+                        <Switch
+                            id="close-protection"
+                            checked={closeProtection}
+                            onCheckedChange={(checked) => {
+                                setCloseProtection(checked)
+                                localStorage.setItem(
+                                    STORAGE_CLOSE_PROTECTION_KEY,
+                                    checked.toString(),
+                                )
+                                onCloseProtectionChange?.(checked)
+                            }}
+                        />
                    </SettingItem>

                    {/* Diagram Style */}
@@ -488,146 +425,6 @@ function SettingsContent({
                        </div>
                    </SettingItem>

-                    {/* Panel Visibility */}
-                    <SettingItem
-                        label={dict.settings.panelVisibility}
-                        description={dict.settings.panelVisibilityDescription}
-                    >
-                        <div className="flex flex-col gap-2">
-                            <label className="flex items-center gap-2 cursor-pointer">
-                                <Switch
-                                    id="show-recent-chats"
-                                    checked={showRecentChats}
-                                    onCheckedChange={(v) =>
-                                        handlePanelToggle(
-                                            STORAGE_KEYS.showRecentChats,
-                                            v,
-                                            setShowRecentChats,
-                                        )
-                                    }
-                                />
-                                <span className="text-xs text-muted-foreground">
-                                    {dict.settings.showRecentChats}
-                                </span>
-                            </label>
-                            <label className="flex items-center gap-2 cursor-pointer">
-                                <Switch
-                                    id="show-my-templates"
-                                    checked={showMyTemplates}
-                                    onCheckedChange={(v) =>
-                                        handlePanelToggle(
-                                            STORAGE_KEYS.showMyTemplates,
-                                            v,
-                                            setShowMyTemplates,
-                                        )
-                                    }
-                                />
-                                <span className="text-xs text-muted-foreground">
-                                    {dict.settings.showMyTemplates}
-                                </span>
-                            </label>
-                            <label className="flex items-center gap-2 cursor-pointer">
-                                <Switch
-                                    id="show-quick-examples"
-                                    checked={showQuickExamples}
-                                    onCheckedChange={(v) =>
-                                        handlePanelToggle(
-                                            STORAGE_KEYS.showQuickExamples,
-                                            v,
-                                            setShowQuickExamples,
-                                        )
-                                    }
-                                />
-                                <span className="text-xs text-muted-foreground">
-                                    {dict.settings.showQuickExamples}
-                                </span>
-                            </label>
-                        </div>
-                    </SettingItem>
-
-                    {/* VLM Diagram Validation */}
-                    <SettingItem
-                        label={dict.settings.diagramValidation}
-                        description={dict.settings.diagramValidationDescription}
-                    >
-                        <div className="flex items-center gap-2">
-                            <Switch
-                                id="vlm-validation"
-                                checked={vlmValidationEnabled}
-                                onCheckedChange={onVlmValidationChange}
-                            />
-                            <span className="text-sm text-muted-foreground">
-                                {vlmValidationEnabled
-                                    ? dict.settings.enabled
-                                    : dict.settings.disabled}
-                            </span>
-                        </div>
-                    </SettingItem>
-
-                    {/* Custom System Message */}
-                    <div className="py-4 space-y-3">
-                        <div className="space-y-0.5">
-                            <Label
-                                htmlFor="custom-system-message"
-                                className="text-sm font-medium"
-                            >
-                                {dict.settings.customSystemMessage}
-                            </Label>
-                            <p className="text-xs text-muted-foreground">
-                                {dict.settings.customSystemMessageDescription}
-                            </p>
-                        </div>
-                        <Textarea
-                            id="custom-system-message"
-                            value={customSystemMessage}
-                            onChange={(e) =>
-                                onCustomSystemMessageChange(e.target.value)
-                            }
-                            placeholder={
-                                dict.settings.customSystemMessagePlaceholder
-                            }
-                            className="min-h-[80px] max-h-[160px] text-sm"
-                            maxLength={5000}
-                        />
-                    </div>
-
-                    {/* Send Shortcut */}
-                    <SettingItem
-                        label={dict.settings.sendShortcut}
-                        description={dict.settings.sendShortcutDescription}
-                    >
-                        <Select
-                            value={sendShortcut}
-                            onValueChange={(value) => {
-                                setSendShortcut(value)
-                                localStorage.setItem(
-                                    STORAGE_KEYS.sendShortcut,
-                                    value,
-                                )
-                                window.dispatchEvent(
-                                    new CustomEvent("sendShortcutChange", {
-                                        detail: value,
-                                    }),
-                                )
-                            }}
-                        >
-                            <SelectTrigger
-                                id="send-shortcut-select"
-                                className="w-auto h-9 rounded-xl"
-                            >
-                                <SelectValue />
-                            </SelectTrigger>
-                            <SelectContent>
-                                <SelectItem value="enter">
-                                    {dict.settings.enterToSend}
-                                </SelectItem>
-                                <SelectItem value="ctrl-enter">
-                                    {dict.settings.ctrlEnterToSend}
-                                </SelectItem>
-                            </SelectContent>
-                        </Select>
-                    </SettingItem>
-
                    {/* Proxy Settings - Electron only */}
                    {typeof window !== "undefined" &&
                        window.electronAPI?.isElectron && (
@@ -77,13 +77,12 @@ function CommandInput({
  )
 }

-const CommandList = React.forwardRef<
-  React.ElementRef<typeof CommandPrimitive.List>,
-  React.ComponentPropsWithoutRef<typeof CommandPrimitive.List>
->(({ className, ...props }, ref) => {
+function CommandList({
+  className,
+  ...props
+}: React.ComponentProps<typeof CommandPrimitive.List>) {
  return (
    <CommandPrimitive.List
-      ref={ref}
      data-slot="command-list"
      className={cn(
        "max-h-[300px] scroll-py-1 overflow-x-hidden overflow-y-auto",
@@ -92,8 +91,7 @@ const CommandList = React.forwardRef<
      {...props}
    />
  )
-})
-CommandList.displayName = CommandPrimitive.List.displayName ?? "CommandList"
+}

 function CommandEmpty({
  ...props
@@ -2,7 +2,7 @@

 import type React from "react"
 import { createContext, useContext, useEffect, useRef, useState } from "react"
-import type { DrawIoEmbedRef, EventExport } from "react-drawio"
+import type { DrawIoEmbedRef } from "react-drawio"
 import { toast } from "sonner"
 import type { ExportFormat } from "@/components/save-dialog"
 import { getApiEndpoint } from "@/lib/base-path"
@@ -20,10 +20,9 @@ interface DiagramContextType {
    loadDiagram: (chart: string, skipValidation?: boolean) => string | null
    handleExport: () => void
    handleExportWithoutHistory: () => void
-    resolverRef: React.MutableRefObject<((value: string) => void) | null>
-    drawioRef: React.MutableRefObject<DrawIoEmbedRef | null>
-    handleDiagramExport: (data: EventExport) => void
-    handleDiagramAutoSave: (data: { xml?: string }) => void
+    resolverRef: React.Ref<((value: string) => void) | null>
+    drawioRef: React.Ref<DrawIoEmbedRef | null>
+    handleDiagramExport: (data: any) => void
    clearDiagram: () => void
    saveDiagramToFile: (
        filename: string,
@@ -32,7 +31,6 @@ interface DiagramContextType {
        successMessage?: string,
    ) => void
    getThumbnailSvg: () => Promise<string | null>
-    captureValidationPng: () => Promise<string | null>
    isDrawioReady: boolean
    onDrawioLoad: () => void
    resetDrawioReady: () => void
@@ -53,10 +51,10 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
    const hasCalledOnLoadRef = useRef(false)
    const drawioRef = useRef<DrawIoEmbedRef | null>(null)
    const resolverRef = useRef<((value: string) => void) | null>(null)
-    // Resolver for PNG export (used for VLM validation)
-    const pngResolverRef = useRef<((value: string) => void) | null>(null)
    // Track if we're expecting an export for history (user-initiated)
    const expectHistoryExportRef = useRef<boolean>(false)
+    // Track if diagram has been restored after DrawIO remount (e.g., theme change)
+    const hasDiagramRestoredRef = useRef<boolean>(false)
    // Track latest chartXML for restoration after remount
    const chartXMLRef = useRef<string>("")

@@ -65,10 +63,6 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
        if (hasCalledOnLoadRef.current) return
        hasCalledOnLoadRef.current = true
        setIsDrawioReady(true)
-        // Restore diagram after remount (e.g., theme/UI change)
-        if (drawioRef.current && isRealDiagram(chartXMLRef.current)) {
-            drawioRef.current.load({ xml: chartXMLRef.current })
-        }
    }

    const resetDrawioReady = () => {
@@ -81,9 +75,27 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
        chartXMLRef.current = chartXML
    }, [chartXML])

+    // Restore diagram when DrawIO becomes ready after remount (e.g., theme/UI change)
+    useEffect(() => {
+        // Reset restore flag when DrawIO is not ready (preparing for next restore cycle)
+        if (!isDrawioReady) {
+            hasDiagramRestoredRef.current = false
+            return
+        }
+        // Only restore once per ready cycle
+        if (hasDiagramRestoredRef.current) return
+        hasDiagramRestoredRef.current = true
+
+        // Restore diagram from ref if we have one
+        const xmlToRestore = chartXMLRef.current
+        if (isRealDiagram(xmlToRestore) && drawioRef.current) {
+            drawioRef.current.load({ xml: xmlToRestore })
+        }
+    }, [isDrawioReady])
+
    // Track if we're expecting an export for file save (stores raw export data)
    const saveResolverRef = useRef<{
-        resolver: ((data: string, fullDiagramXML?: string) => void) | null
+        resolver: ((data: string) => void) | null
        format: ExportFormat | null
    }>({ resolver: null, format: null })

@@ -135,37 +147,6 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
        }
    }

-    // Capture current diagram as PNG for VLM validation
-    const captureValidationPng = async (): Promise<string | null> => {
-        if (!drawioRef.current) return null
-        // Don't export if diagram is empty
-        if (!isRealDiagram(chartXML)) return null
-
-        try {
-            const pngData = await Promise.race([
-                new Promise<string>((resolve) => {
-                    pngResolverRef.current = resolve
-                    drawioRef.current?.exportDiagram({ format: "png" })
-                }),
-                new Promise<string>((_, reject) =>
-                    setTimeout(
-                        () => reject(new Error("PNG export timeout")),
-                        5000,
-                    ),
-                ),
-            ])
-
-            // PNG data should be a base64 data URL
-            if (pngData?.startsWith("data:image/png")) {
-                return pngData
-            }
-            return null
-        } catch {
-            // Timeout is expected occasionally - don't log as error
-            return null
-        }
-    }
-
    const loadDiagram = (
        chart: string,
        skipValidation?: boolean,
@@ -204,32 +185,21 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
        return null
    }

-    const handleDiagramExport = (data: EventExport) => {
-        // Handle PNG export for VLM validation
-        if (pngResolverRef.current && data.data?.startsWith("data:image/png")) {
-            pngResolverRef.current(data.data)
-            pngResolverRef.current = null
-            return
-        }
-
+    const handleDiagramExport = (data: any) => {
        // Handle save to file if requested (process raw data before extraction)
        if (saveResolverRef.current.resolver) {
            const format = saveResolverRef.current.format
-            saveResolverRef.current.resolver(data.data, data.xml)
+            saveResolverRef.current.resolver(data.data)
            saveResolverRef.current = { resolver: null, format: null }
            // For non-xmlsvg formats, skip XML extraction as it will fail
            // Only drawio (which uses xmlsvg internally) has the content attribute
-            // xmlsvg is saved directly as SVG file, no need for extraction
-            if (format === "png" || format === "svg" || format === "xmlsvg") {
+            if (format === "png" || format === "svg") {
                return
            }
        }

-        // Don't write chartXML here: exports don't change the diagram, and
-        // data.xml from xmlsvg exports has compressed <diagram> payloads that
-        // would break edit_diagram/display_diagram. Autosave keeps chartXML
-        // up to date with the full uncompressed multi-page document (#879).
        const extractedXML = extractDiagramXML(data.data)
+        setChartXML(extractedXML)
        setLatestSvg(data.data)

        // Only add to history if this was a user-initiated export
@@ -256,16 +226,6 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
        }
    }

-    const handleDiagramAutoSave = (data: { xml?: string }) => {
-        if (!data?.xml) return
-        // Don't overwrite a pending restore - if we have a real diagram in state
-        // but DrawIO isn't ready yet, it means we're waiting to restore
-        if (!isDrawioReady && isRealDiagram(chartXML)) {
-            return
-        }
-        setChartXML(data.xml)
-    }
-
    const clearDiagram = () => {
        const emptyDiagram = `<mxfile><diagram name="Page-1" id="page-1"><mxGraphModel><root><mxCell id="0"/><mxCell id="1" parent="0"/></root></mxGraphModel></diagram></mxfile>`
        // Skip validation for trusted internal template (loadDiagram also sets chartXML)
@@ -286,21 +246,18 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
        }

        // Map format to draw.io export format
-        const drawioFormat =
-            format === "drawio" || format === "xmlsvg" ? "xmlsvg" : format
+        const drawioFormat = format === "drawio" ? "xmlsvg" : format

        // Set up the resolver before triggering export
        saveResolverRef.current = {
-            resolver: (exportData: string, fullDiagramXML?: string) => {
+            resolver: (exportData: string) => {
                let fileContent: string | Blob
                let mimeType: string
                let extension: string

                if (format === "drawio") {
-                    // Prefer the complete document from the export event so all pages are saved.
-                    const xml = fullDiagramXML?.trim()
-                        ? fullDiagramXML
-                        : extractDiagramXML(exportData)
+                    // Extract XML from SVG for .drawio format
+                    const xml = extractDiagramXML(exportData)
                    let xmlContent = xml
                    if (!xml.includes("<mxfile")) {
                        xmlContent = `<mxfile><diagram name="Page-1" id="page-1">${xml}</diagram></mxfile>`
@@ -313,13 +270,8 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
                    fileContent = exportData
                    mimeType = "image/png"
                    extension = ".png"
-                } else if (format === "xmlsvg") {
-                    // Editable SVG: pass data URL directly (like PNG)
-                    fileContent = exportData
-                    mimeType = "image/svg+xml"
-                    extension = ".drawio.svg"
                } else {
-                    // SVG format (view-only)
+                    // SVG format
                    fileContent = exportData
                    mimeType = "image/svg+xml"
                    extension = ".svg"
@@ -398,11 +350,9 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
                resolverRef,
                drawioRef,
                handleDiagramExport,
-                handleDiagramAutoSave,
                clearDiagram,
                saveDiagramToFile,
                getThumbnailSvg,
-                captureValidationPng,
                isDrawioReady,
                onDrawioLoad,
                resetDrawioReady,
@@ -11,9 +11,6 @@ services:
        # - NEXT_PUBLIC_BASE_PATH=/nextaidrawio
    ports: ["3000:3000"]
    env_file: .env
-    volumes:
-      # Persists admin panel settings (data/settings.json)
-      - ./data:/app/data
    # environment:
    #   # For subdirectory deployment, uncomment and set your path:
    #   NEXT_PUBLIC_BASE_PATH: /nextaidrawio
@@ -19,9 +19,7 @@

 一个集成了AI功能的Next.js网页应用，与draw.io图表无缝结合。通过自然语言命令和AI辅助可视化来创建、修改和增强图表。

-> 注：感谢 <img src="https://raw.githubusercontent.com/DayuanJiang/next-ai-draw-io/main/public/doubao-color.png" alt="" height="20" /> [字节跳动豆包](https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio) 的赞助支持，本项目的 Demo 现已接入强大的 glm-4.7 模型！
-
-<a href="https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio" target="_blank"><img src="../../public/volcengine-invite.png" alt="火山引擎方舟 Coding Plan" width="300" /></a>
+> 注：感谢 <img src="https://raw.githubusercontent.com/DayuanJiang/next-ai-draw-io/main/public/doubao-color.png" alt="" height="20" /> [字节跳动豆包](https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project) 的赞助支持，本项目的 Demo 现已接入强大的 K2-thinking 模型！

 https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979

@@ -30,7 +28,7 @@ https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979
  - [目录](#目录)
  - [示例](#示例)
  - [功能特性](#功能特性)
-  - [MCP服务器](#mcp服务器)
+  - [MCP服务器（预览）](#mcp服务器预览)
    - [Claude Code CLI](#claude-code-cli)
  - [快速开始](#快速开始)
    - [在线试用](#在线试用)
@@ -56,31 +54,31 @@ https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979
  <tr>
    <td colspan="2" valign="top" align="center">
      <strong>动画Transformer连接器</strong><br />
-      <p><strong>Prompt:</strong> Give me a **animated connector** diagram of transformer's architecture.</p>
+      <p><strong>提示词：</strong> 给我一个带有**动画连接器**的Transformer架构图。</p>
      <img src="../../public/animated_connectors.svg" alt="带动画连接器的Transformer架构" width="480" />
    </td>
  </tr>
  <tr>
    <td width="50%" valign="top">
-      <strong>RAG技术图</strong><br />
-      <p><strong>Prompt:</strong> Generate a RAG architecture diagram for **chat application**. Use connected diagram for data ingestion</p>
-      <img src="../../public/rag_prod.svg" alt="RAG架构图" width="480" />
+      <strong>GCP架构图</strong><br />
+      <p><strong>提示词：</strong> 使用**GCP图标**生成一个GCP架构图。在这个图中，用户连接到托管在实例上的前端。</p>
+      <img src="../../public/gcp_demo.svg" alt="GCP架构图" width="480" />
    </td>
    <td width="50%" valign="top">
-      <strong>React和AWS认证流程</strong><br />
-      <p><strong>Prompt:</strong> Generate authentication process using React with **AWS**. Use Serverless architecture.</p>
-      <img src="../../public/auth.svg" alt="认证架构图" width="480" />
+      <strong>AWS架构图</strong><br />
+      <p><strong>提示词：</strong> 使用**AWS图标**生成一个AWS架构图。在这个图中，用户连接到托管在实例上的前端。</p>
+      <img src="../../public/aws_demo.svg" alt="AWS架构图" width="480" />
    </td>
  </tr>
  <tr>
    <td width="50%" valign="top">
-      <strong>开放式创新</strong><br />
-      <p><strong>Prompt:</strong> Create visualization of Henry Chesbrough's Open Innovation model.</p>
-      <img src="../../public/inno.svg" alt="开放式创新图" width="480" />
+      <strong>Azure架构图</strong><br />
+      <p><strong>提示词：</strong> 使用**Azure图标**生成一个Azure架构图。在这个图中，用户连接到托管在实例上的前端。</p>
+      <img src="../../public/azure_demo.svg" alt="Azure架构图" width="480" />
    </td>
    <td width="50%" valign="top">
      <strong>猫咪素描</strong><br />
-      <p><strong>Prompt:</strong> Draw a cute cat for me.</p>
+      <p><strong>提示词：</strong> 给我画一只可爱的猫。</p>
      <img src="../../public/cat_demo.svg" alt="猫咪绘图" width="240" />
    </td>
  </tr>
@@ -96,10 +94,11 @@ https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979
 -   **图表历史记录**：全面的版本控制，跟踪所有更改，允许您查看和恢复AI编辑前的图表版本
 -   **交互式聊天界面**：与AI实时对话来完善您的图表
 -   **云架构图支持**：专门支持生成云架构图（AWS、GCP、Azure）
-   **自动计算布局**：画架构图、流程图、泳道图/BPMN、时序图、思维导图和组织架构图时，AI 只描述结构——谁包含谁，或者谁指向谁——所有坐标、尺寸和连线路径都由程序计算。容器一定装得下里面的内容，同层元素不会重叠，连线会绕开本来会穿过的图形。之后您手动移动或改色的部分会被当作图表的一部分读回来，所以后续修改不会覆盖掉您的调整。
 -   **动画连接器**：在图表元素之间创建动态动画连接器，实现更好的可视化效果

-## MCP服务器
+## MCP服务器（预览）
+
+> **预览功能**：此功能为实验性功能，可能不稳定。

 通过MCP（模型上下文协议）在Claude Desktop、Cursor和VS Code等AI代理中使用Next AI Draw.io。

@@ -196,16 +195,14 @@ npm run dev

 ## 多提供商支持

-   [字节跳动豆包](https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio)
+-   [字节跳动豆包](https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project)
 -   AWS Bedrock（默认）
 -   OpenAI
 -   Anthropic
 -   Google AI
-   Google Vertex AI
 -   Azure OpenAI
 -   Ollama
 -   OpenRouter
-   AIHubMix
 -   DeepSeek
 -   SiliconFlow
 -   ModelScope
@@ -216,20 +213,10 @@ npm run dev

 📖 **[详细的提供商配置指南](./ai-providers.md)** - 查看各提供商的设置说明。

-### 服务端多模型配置
-
-管理员可以配置多个服务端模型，让所有用户无需提供个人 API Key 即可使用。通过 `AI_MODELS_CONFIG` 环境变量（JSON 字符串）或 `ai-models.json` 文件配置。如果只需要单 provider 下的多个模型，也可以直接在 `AI_MODEL` 中用逗号分隔模型 ID。
-
 **模型要求**：此任务需要强大的模型能力，因为它涉及生成具有严格格式约束的长文本（draw.io XML）。推荐使用 Claude Sonnet 4.5、GPT-5.1、Gemini 3 Pro 和 DeepSeek V3.2/R1。

 注意：`claude` 系列已在带有 AWS、Azure、GCP 等云架构 Logo 的 draw.io 图表上进行训练，因此如果您想创建云架构图，这是最佳选择。

-### 管理面板
-
-设置 `ADMIN_PASSWORD` 环境变量并访问 `/admin`，即可在 Web 面板中管理服务端设置（模型、访问码、功能开关、可观测性、配额），无需手动编辑 `.env`。
-
-📖 **[管理面板指南](./admin-panel.md)** — 启用方法、优先级规则和注意事项。
-

 ## 工作原理

@@ -244,7 +231,7 @@ npm run dev

 ## 支持与联系

-**特别感谢[字节跳动豆包](https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio)赞助演示站点的 API Token 使用！** 注册火山引擎 ARK 平台即可获得50万免费Token！
+**特别感谢[字节跳动豆包](https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project)赞助演示站点的 API Token 使用！** 注册火山引擎 ARK 平台即可获得50万免费Token！

 如果您觉得这个项目有用，请考虑[赞助](https://github.com/sponsors/DayuanJiang)来帮助我托管在线演示站点！

@@ -1,24 +0,0 @@
-# 管理面板
-
-无需手动编辑 `.env`，您可以在 Web 管理面板中管理服务端设置。
-
-## 启用面板
-
-1. 设置 `ADMIN_PASSWORD` 环境变量（不设置则面板禁用）。
-2. 访问 `/admin` 并登录。
-
-## 可配置内容
-
-1. **Models（模型）** — 添加提供商及其 API Key 和模型列表，交互与应用内的模型设置相同。保存后这些模型成为所有用户可用的服务端模型，并在请求时与环境中的 `AI_MODELS_CONFIG` / `ai-models.json` 合并（面板不会修改这些环境文件）。
-2. **其余区块** — 访问码、生成参数、功能开关、可观测性和配额。保存的设置会写入 `data/settings.json` 并立即生效，无需重启（少数设置如 Langfuse 和 DynamoDB 标记为"需要重启"）。
-
-## 优先级
-
-面板中保存的设置覆盖环境变量，环境变量覆盖内置默认值。删除已保存的值会回退到环境变量。
-
-## 注意事项
-
- 密钥以明文形式存储在 `data/settings.json` 中（文件权限 600），请妥善保管该文件。
- 在无服务器平台（Vercel、Cloudflare Workers）上没有持久化磁盘，面板为只读 — 请改用环境变量配置。
- 使用 Docker 时，`data/` 目录通过 `docker-compose.yml` 中的卷持久化。
- `NEXT_PUBLIC_*` 变量在构建时固化，无法在面板中修改。
@@ -13,7 +13,7 @@

 ### 豆包 (字节跳动火山引擎)

-> **免费 Token**：在 [火山引擎 ARK 平台](https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio) 注册，即可获得所有模型 50 万免费 Token！
+> **免费 Token**：在 [火山引擎 ARK 平台](https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project) 注册，即可获得所有模型 50 万免费 Token！

 ```bash
 DOUBAO_API_KEY=your_api_key
@@ -46,21 +46,6 @@ AI_MODEL=gpt-4o
 OPENAI_BASE_URL=https://your-custom-endpoint/v1
 ```

-### AIHubMix
-
-AIHubMix 通过单个 API Key 聚合 Claude、GPT、Gemini、DeepSeek 等模型。
-
-```bash
-AIHUBMIX_API_KEY=your_api_key
-AI_MODEL=claude-sonnet-4-5-20250929
-```
-
-可选的自定义端点：
-
-```bash
-AIHUBMIX_BASE_URL=https://aihubmix.com/v1
-```
-
 ### Anthropic

 ```bash
@@ -68,13 +53,6 @@ ANTHROPIC_API_KEY=your_api_key
 AI_MODEL=claude-sonnet-4-5-20250514
 ```

-或者使用 Bearer 认证令牌（例如通过会下发 OAuth 风格 token 的网关时）。`ANTHROPIC_AUTH_TOKEN` 会作为 `Authorization: Bearer <token>` 头发送，而 `ANTHROPIC_API_KEY` 会作为 `x-api-key` 头发送。两者互斥，只能设置其中之一：
-
-```bash
-ANTHROPIC_AUTH_TOKEN=your_auth_token
-AI_MODEL=claude-sonnet-4-5-20250514
-```
-
 可选的自定义端点：

 ```bash
@@ -229,98 +207,6 @@ AI_MODEL=openai/gpt-4o

 从 [Vercel AI Gateway 仪表板](https://vercel.com/ai-gateway) 获取您的 API 密钥。

-### MiniMax
-
-MiniMax 支持两种 API 格式：
- **Anthropic 兼容**（`/anthropic` 端点）— 推荐，支持 interleaved thinking
- **OpenAI 兼容**（`/v1` 端点）— 标准 OpenAI 聊天补全格式
-
-```bash
-MINIMAX_API_KEY=your_api_key
-AI_MODEL=MiniMax-M3
-```
-
-可选配置：
-
-```bash
-# 中国大陆版，Anthropic 兼容（默认）
-MINIMAX_BASE_URL=https://api.minimaxi.com/anthropic
-
-# 中国大陆版，OpenAI 兼容
-MINIMAX_BASE_URL=https://api.minimaxi.com/v1
-
-# 国际版，Anthropic 兼容
-MINIMAX_BASE_URL=https://api.minimax.io/anthropic
-
-# 国际版，OpenAI 兼容
-MINIMAX_BASE_URL=https://api.minimax.io/v1
-```
-
-### GLM (智谱 AI)
-
-```bash
-GLM_API_KEY=your_api_key
-AI_MODEL=glm-4
-```
-
-可选的自定义端点：
-
-```bash
-GLM_BASE_URL=https://your-custom-endpoint
-```
-
-### Qwen (阿里云通义千问)
-
-```bash
-QWEN_API_KEY=your_api_key
-AI_MODEL=qwen-turbo
-```
-
-可选的自定义端点：
-
-```bash
-QWEN_BASE_URL=https://your-custom-endpoint
-```
-
-### Kimi (月之暗面 Moonshot AI)
-
-```bash
-KIMI_API_KEY=your_api_key
-AI_MODEL=kimi-latest
-```
-
-可选的自定义端点：
-
-```bash
-KIMI_BASE_URL=https://your-custom-endpoint
-```
-
-### Qiniu (七牛云)
-
-```bash
-QINIU_API_KEY=your_api_key
-AI_MODEL=your_model_id
-```
-
-可选的自定义端点：
-
-```bash
-QINIU_BASE_URL=https://your-custom-endpoint
-```
-
-### MiMo (小米)
-
-```bash
-MIMO_API_KEY=your_api_key
-AI_MODEL=mimo-v2.5-pro
-```
-
-可选的自定义端点（Token Plan 订阅用户请设置专属 Base URL）：
-
-```bash
-MIMO_BASE_URL=https://token-plan-cn.xiaomimimo.com/v1
-```
-
 ## 自动检测

 如果您只配置了**一个**提供商的 API 密钥，系统将自动检测并使用该提供商。无需设置 `AI_PROVIDER`。
@@ -328,77 +214,9 @@ MIMO_BASE_URL=https://token-plan-cn.xiaomimimo.com/v1
 如果您配置了**多个** API 密钥，则必须显式设置 `AI_PROVIDER`：

 ```bash
-AI_PROVIDER=google  # 或：openai, anthropic, aihubmix, deepseek, siliconflow, doubao, azure, bedrock, openrouter, ollama, gateway, sglang, modelscope, minimax, glm, qwen, kimi, qiniu, mimo
+AI_PROVIDER=google  # 或：openai, anthropic, deepseek, siliconflow, doubao, azure, bedrock, openrouter, ollama, gateway, sglang
 ```

-## 服务端多模型配置
-
-管理员可以配置多个服务端模型，让所有用户无需提供个人 API Key 即可使用。
-
-### 配置方式
-
-**方式一：环境变量**（推荐用于云部署）
-
-设置 `AI_MODELS_CONFIG` 为 JSON 字符串：
-
-```bash
-AI_MODELS_CONFIG='{"providers":[{"name":"OpenAI","provider":"openai","models":["gpt-4o"],"default":true}]}'
-```
-
-**方式二：配置文件**
-
-在项目根目录创建 `ai-models.json` 文件（或通过 `AI_MODELS_CONFIG_PATH` 指定路径）。
-
-**方式三：`AI_MODEL` 用逗号分隔**（单 provider 的快速配置）
-
-如果只需要暴露同一 provider 下的多个模型，可以直接在 `AI_MODEL` 里用逗号分隔。第一个模型会作为默认值。
-
-```bash
-AI_PROVIDER=doubao
-AI_MODEL=doubao-seed-1-8-251215,doubao-seed-1-6-flash,doubao-seed-1-6-pro
-```
-
-这是等价 `ai-models.json` 的简写形式。如果需要配置多个 provider，或自定义 `apiKeyEnv` / `baseUrlEnv`，请使用方式一或方式二。
-
-### 配置示例
-
-```json
-{
-  "providers": [
-    {
-      "name": "OpenAI Production",
-      "provider": "openai",
-      "models": ["gpt-4o", "gpt-4o-mini"],
-      "default": true
-    },
-    {
-      "name": "Custom DeepSeek",
-      "provider": "deepseek",
-      "models": ["deepseek-chat"],
-      "apiKeyEnv": "MY_DEEPSEEK_KEY",
-      "baseUrlEnv": "MY_DEEPSEEK_URL"
-    }
-  ]
-}
-```
-
-### 字段说明
-
-| 字段 | 必填 | 说明 |
-|------|------|------|
-| `name` | 是 | 显示名称（支持同一提供商多个配置） |
-| `provider` | 是 | 提供商类型（`openai`, `anthropic`, `google`, `bedrock` 等） |
-| `models` | 是 | 模型 ID 列表 |
-| `default` | 否 | 设为 `true` 表示默认选中该提供商的第一个模型 |
-| `apiKeyEnv` | 否 | 自定义 API Key 环境变量名（默认使用提供商标准变量如 `OPENAI_API_KEY`） |
-| `baseUrlEnv` | 否 | 自定义 Base URL 环境变量名 |
-
-### 说明
-
- API Key 和凭证通过环境变量提供。默认使用标准变量名（如 `OPENAI_API_KEY`），也可通过 `apiKeyEnv` 指定自定义变量名。
- `name` 字段允许同一提供商多个配置（例如 "OpenAI Production" 和 "OpenAI Staging" 都使用 `provider: "openai"` 但 `apiKeyEnv` 不同）。
- 如果配置不存在，应用会回退到 `AI_PROVIDER`/`AI_MODEL` 环境变量配置。
-
 ## 模型能力要求

 此任务对模型能力要求极高，因为它涉及生成具有严格格式约束（draw.io XML）的长文本。
@@ -1,24 +0,0 @@
-# Admin Panel
-
-Instead of hand-editing `.env`, you can manage server settings in a web admin panel.
-
-## Enabling the panel
-
-1. Set the `ADMIN_PASSWORD` environment variable (leave unset to disable the panel).
-2. Visit `/admin` and sign in.
-
-## What you can configure
-
-1. **Models** — add providers with their API keys and model lists, using the same UI as the in-app model settings. Saved models become server-side models available to all users, merged with any `AI_MODELS_CONFIG` / `ai-models.json` from your environment at request time (the panel does not modify those env files).
-2. **Other sections** — access codes, generation parameters, features, observability, and quota. Saved settings are written to `data/settings.json` and apply immediately — no restart needed (a few settings such as Langfuse and DynamoDB are marked "Restart Required").
-
-## Precedence
-
-Settings saved in the panel override environment variables, which override built-in defaults. Removing a saved value falls back to the environment variable.
-
-## Notes
-
- Secrets are stored in plaintext in `data/settings.json` (file mode 600). Keep the file private.
- On serverless platforms (Vercel, Cloudflare Workers) there is no persistent disk, so the panel is read-only — configure via environment variables there.
- With Docker, the `data/` directory is persisted via the volume in `docker-compose.yml`.
- `NEXT_PUBLIC_*` variables are baked in at build time and cannot be changed in the panel.
@@ -13,7 +13,7 @@ This guide explains how to configure different AI model providers for next-ai-dr

 ### Doubao (ByteDance Volcengine)

-> **Free tokens**: Register on the [Volcengine ARK platform](https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio) to get 500K free tokens for all models!
+> **Free tokens**: Register on the [Volcengine ARK platform](https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project) to get 500K free tokens for all models!

 ```bash
 DOUBAO_API_KEY=your_api_key
@@ -33,21 +33,6 @@ Optional custom endpoint:
 GOOGLE_BASE_URL=https://your-custom-endpoint
 ```

-### Google Vertex AI (Enterprise GCP)
-
-Google Vertex AI offers enterprise-grade features and data residency. **Express Mode** allows for simple API key authentication, making it compatible with edge runtimes like Vercel and Cloudflare.
-
-```bash
-GOOGLE_VERTEX_API_KEY=your_api_key
-AI_MODEL=gemini-2.0-flash
-```
-
-Optional custom endpoint:
-
-```bash
-GOOGLE_VERTEX_BASE_URL=https://your-custom-endpoint
-```
-
 ### OpenAI

 ```bash
@@ -61,21 +46,6 @@ Optional custom endpoint (for OpenAI-compatible services):
 OPENAI_BASE_URL=https://your-custom-endpoint/v1
 ```

-### AIHubMix
-
-AIHubMix provides access to Claude, GPT, Gemini, DeepSeek, and other models through a single API key.
-
-```bash
-AIHUBMIX_API_KEY=your_api_key
-AI_MODEL=claude-sonnet-4-5-20250929
-```
-
-Optional custom endpoint:
-
-```bash
-AIHUBMIX_BASE_URL=https://aihubmix.com/v1
-```
-
 ### Anthropic

 ```bash
@@ -83,13 +53,6 @@ ANTHROPIC_API_KEY=your_api_key
 AI_MODEL=claude-sonnet-4-5-20250514
 ```

-Or use a Bearer auth token instead of an API key (e.g. when going through a gateway that issues OAuth-style tokens). `ANTHROPIC_AUTH_TOKEN` is sent as `Authorization: Bearer <token>`, while `ANTHROPIC_API_KEY` is sent as `x-api-key`. The two are mutually exclusive — set only one:
-
-```bash
-ANTHROPIC_AUTH_TOKEN=your_auth_token
-AI_MODEL=claude-sonnet-4-5-20250514
-```
-
 Optional custom endpoint:

 ```bash
@@ -244,98 +207,6 @@ Model format uses `provider/model` syntax:

 Get your API key from the [Vercel AI Gateway dashboard](https://vercel.com/ai-gateway).

-### MiniMax
-
-MiniMax supports two API formats:
- **Anthropic-compatible** (`/anthropic` endpoint) — recommended, supports interleaved thinking
- **OpenAI-compatible** (`/v1` endpoint) — standard OpenAI chat completions format
-
-```bash
-MINIMAX_API_KEY=your_api_key
-AI_MODEL=MiniMax-M3
-```
-
-Optional configuration:
-
-```bash
-# China mainland, Anthropic-compatible (default)
-MINIMAX_BASE_URL=https://api.minimaxi.com/anthropic
-
-# China mainland, OpenAI-compatible
-MINIMAX_BASE_URL=https://api.minimaxi.com/v1
-
-# International, Anthropic-compatible
-MINIMAX_BASE_URL=https://api.minimax.io/anthropic
-
-# International, OpenAI-compatible
-MINIMAX_BASE_URL=https://api.minimax.io/v1
-```
-
-### GLM (Zhipu AI)
-
-```bash
-GLM_API_KEY=your_api_key
-AI_MODEL=glm-4
-```
-
-Optional custom endpoint:
-
-```bash
-GLM_BASE_URL=https://your-custom-endpoint
-```
-
-### Qwen (Alibaba Cloud)
-
-```bash
-QWEN_API_KEY=your_api_key
-AI_MODEL=qwen-turbo
-```
-
-Optional custom endpoint:
-
-```bash
-QWEN_BASE_URL=https://your-custom-endpoint
-```
-
-### Kimi (Moonshot AI)
-
-```bash
-KIMI_API_KEY=your_api_key
-AI_MODEL=kimi-latest
-```
-
-Optional custom endpoint:
-
-```bash
-KIMI_BASE_URL=https://your-custom-endpoint
-```
-
-### Qiniu (Qiniu Cloud)
-
-```bash
-QINIU_API_KEY=your_api_key
-AI_MODEL=your_model_id
-```
-
-Optional custom endpoint:
-
-```bash
-QINIU_BASE_URL=https://your-custom-endpoint
-```
-
-### MiMo (Xiaomi)
-
-```bash
-MIMO_API_KEY=your_api_key
-AI_MODEL=mimo-v2.5-pro
-```
-
-Optional custom endpoint (Token Plan subscribers should set their dedicated Base URL):
-
-```bash
-MIMO_BASE_URL=https://token-plan-cn.xiaomimimo.com/v1
-```
-
 ## Auto-Detection

 If you only configure **one** provider's API key, the system will automatically detect and use that provider. No need to set `AI_PROVIDER`.
@@ -343,77 +214,9 @@ If you only configure **one** provider's API key, the system will automatically
 If you configure **multiple** API keys, you must explicitly set `AI_PROVIDER`:

 ```bash
-AI_PROVIDER=google  # or: openai, anthropic, aihubmix, deepseek, siliconflow, doubao, azure, bedrock, openrouter, ollama, gateway, sglang, modelscope, minimax, glm, qwen, kimi, qiniu, mimo
+AI_PROVIDER=google  # or: openai, anthropic, deepseek, siliconflow, doubao, azure, bedrock, openrouter, ollama, gateway, sglang, modelscope
 ```

-## Server-Side Multi-Model Configuration
-
-Administrators can configure multiple server-side models that are available to all users without requiring personal API keys.
-
-### Configuration Methods
-
-**Option 1: Environment Variable** (recommended for cloud deployments)
-
-Set `AI_MODELS_CONFIG` as a JSON string:
-
-```bash
-AI_MODELS_CONFIG='{"providers":[{"name":"OpenAI","provider":"openai","models":["gpt-4o"],"default":true}]}'
-```
-
-**Option 2: Config File**
-
-Create an `ai-models.json` file in the project root (or set `AI_MODELS_CONFIG_PATH` to a custom location).
-
-**Option 3: Comma-separated `AI_MODEL`** (quick setup, single provider)
-
-If you only need multiple models from one provider, list them in `AI_MODEL` separated by commas. The first model is treated as the default.
-
-```bash
-AI_PROVIDER=doubao
-AI_MODEL=doubao-seed-1-8-251215,doubao-seed-1-6-flash,doubao-seed-1-6-pro
-```
-
-This is shorthand for the equivalent `ai-models.json`. For multiple providers or custom `apiKeyEnv` / `baseUrlEnv`, use Option 1 or 2 instead.
-
-### Example Configuration
-
-```json
-{
-  "providers": [
-    {
-      "name": "OpenAI Production",
-      "provider": "openai",
-      "models": ["gpt-4o", "gpt-4o-mini"],
-      "default": true
-    },
-    {
-      "name": "Custom DeepSeek",
-      "provider": "deepseek",
-      "models": ["deepseek-chat"],
-      "apiKeyEnv": "MY_DEEPSEEK_KEY",
-      "baseUrlEnv": "MY_DEEPSEEK_URL"
-    }
-  ]
-}
-```
-
-### Field Reference
-
-| Field | Required | Description |
-|-------|----------|-------------|
-| `name` | Yes | Display name (supports multiple configs for same provider) |
-| `provider` | Yes | Provider type (`openai`, `anthropic`, `google`, `bedrock`, etc.) |
-| `models` | Yes | List of model IDs |
-| `default` | No | Set to `true` to auto-select this provider's first model as default |
-| `apiKeyEnv` | No | Custom API key env var name (defaults to provider's standard var like `OPENAI_API_KEY`) |
-| `baseUrlEnv` | No | Custom base URL env var name |
-
-### Notes
-
- API keys and credentials are provided via environment variables. By default, standard var names are used (e.g., `OPENAI_API_KEY`), but you can specify custom var names with `apiKeyEnv`.
- The `name` field allows multiple configurations for the same provider (e.g., "OpenAI Production" and "OpenAI Staging" both using `provider: "openai"` but with different `apiKeyEnv` values).
- If config is not present, the app falls back to `AI_PROVIDER`/`AI_MODEL` environment variable configuration.
-
 ## Model Capability Requirements

 This task requires exceptionally strong model capabilities, as it involves generating long-form text with strict formatting constraints (draw.io XML).
@@ -22,27 +22,6 @@ cp env.example .env
 docker run -d -p 3000:3000 --env-file .env ghcr.io/dayuanjiang/next-ai-draw-io:latest
 ```

-### Using server-side model configuration
-
-You can mount an `ai-models.json` file into the container to provide multiple server-side models without exposing user API keys:
-
-```bash
-docker run -d -p 3000:3000 \
-  -e OPENAI_API_KEY=your_api_key \
-  -v $(pwd)/ai-models.json:/app/ai-models.json:ro \
-  ghcr.io/dayuanjiang/next-ai-draw-io:latest
-```
-
-If you prefer to keep the config in a different path inside the container, set `AI_MODELS_CONFIG_PATH`:
-
-```bash
-docker run -d -p 3000:3000 \
-  -e OPENAI_API_KEY=your_api_key \
-  -e AI_MODELS_CONFIG_PATH=/config/ai-models.json \
-  -v $(pwd)/ai-models.json:/config/ai-models.json:ro \
-  ghcr.io/dayuanjiang/next-ai-draw-io:latest
-```
-
 Open [http://localhost:3000](http://localhost:3000) in your browser.

 Replace the environment variables with your preferred AI provider configuration. See [AI Providers](./ai-providers.md) for available options.
@@ -19,7 +19,7 @@

 AI機能とdraw.ioダイアグラムを統合したNext.jsウェブアプリケーションです。自然言語コマンドとAI支援の可視化により、ダイアグラムを作成、修正、強化できます。

-> 注：<img src="https://raw.githubusercontent.com/DayuanJiang/next-ai-draw-io/main/public/doubao-color.png" alt="" height="20" /> [ByteDance Doubao](https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio) のご支援により、デモサイトに強力な glm-4.7 モデルを導入しました！
+> 注：<img src="https://raw.githubusercontent.com/DayuanJiang/next-ai-draw-io/main/public/doubao-color.png" alt="" height="20" /> [ByteDance Doubao](https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project) のご支援により、デモサイトに強力な K2-thinking モデルを導入しました！

 https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979

@@ -28,7 +28,7 @@ https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979
  - [目次](#目次)
  - [例](#例)
  - [機能](#機能)
-  - [MCPサーバー](#mcpサーバー)
+  - [MCPサーバー（プレビュー）](#mcpサーバープレビュー)
    - [Claude Code CLI](#claude-code-cli)
  - [はじめに](#はじめに)
    - [オンラインで試す](#オンラインで試す)
@@ -54,31 +54,31 @@ https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979
  <tr>
    <td colspan="2" valign="top" align="center">
      <strong>アニメーションTransformerコネクタ</strong><br />
-      <p><strong>Prompt:</strong> Give me a **animated connector** diagram of transformer's architecture.</p>
+      <p><strong>プロンプト：</strong> **アニメーションコネクタ**付きのTransformerアーキテクチャ図を作成してください。</p>
      <img src="../../public/animated_connectors.svg" alt="アニメーションコネクタ付きTransformerアーキテクチャ" width="480" />
    </td>
  </tr>
  <tr>
    <td width="50%" valign="top">
-      <strong>RAG技術ダイアグラム</strong><br />
-      <p><strong>Prompt:</strong> Generate a RAG architecture diagram for **chat application**. Use connected diagram for data ingestion</p>
-      <img src="../../public/rag_prod.svg" alt="RAGアーキテクチャ図" width="480" />
+      <strong>GCPアーキテクチャ図</strong><br />
+      <p><strong>プロンプト：</strong> **GCPアイコン**を使用してGCPアーキテクチャ図を生成してください。この図では、ユーザーがインスタンス上でホストされているフロントエンドに接続します。</p>
+      <img src="../../public/gcp_demo.svg" alt="GCPアーキテクチャ図" width="480" />
    </td>
    <td width="50%" valign="top">
-      <strong>ReactとAWSによる認証</strong><br />
-      <p><strong>Prompt:</strong> Generate authentication process using React with **AWS**. Use Serverless architecture.</p>
-      <img src="../../public/auth.svg" alt="認証アーキテクチャ図" width="480" />
+      <strong>AWSアーキテクチャ図</strong><br />
+      <p><strong>プロンプト：</strong> **AWSアイコン**を使用してAWSアーキテクチャ図を生成してください。この図では、ユーザーがインスタンス上でホストされているフロントエンドに接続します。</p>
+      <img src="../../public/aws_demo.svg" alt="AWSアーキテクチャ図" width="480" />
    </td>
  </tr>
  <tr>
    <td width="50%" valign="top">
-      <strong>オープンイノベーション</strong><br />
-      <p><strong>Prompt:</strong> Create visualization of Henry Chesbrough's Open Innovation model.</p>
-      <img src="../../public/inno.svg" alt="オープンイノベーション図" width="480" />
+      <strong>Azureアーキテクチャ図</strong><br />
+      <p><strong>プロンプト：</strong> **Azureアイコン**を使用してAzureアーキテクチャ図を生成してください。この図では、ユーザーがインスタンス上でホストされているフロントエンドに接続します。</p>
+      <img src="../../public/azure_demo.svg" alt="Azureアーキテクチャ図" width="480" />
    </td>
    <td width="50%" valign="top">
      <strong>猫のスケッチ</strong><br />
-      <p><strong>Prompt:</strong> Draw a cute cat for me.</p>
+      <p><strong>プロンプト：</strong> かわいい猫を描いてください。</p>
      <img src="../../public/cat_demo.svg" alt="猫の絵" width="240" />
    </td>
  </tr>
@@ -94,10 +94,11 @@ https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979
 -   **ダイアグラム履歴**：すべての変更を追跡する包括的なバージョン管理。AI編集前のダイアグラムの以前のバージョンを表示・復元可能
 -   **インタラクティブなチャットインターフェース**：AIとリアルタイムでコミュニケーションしてダイアグラムを改善
 -   **クラウドアーキテクチャダイアグラムサポート**：クラウドアーキテクチャダイアグラムの生成を専門的にサポート（AWS、GCP、Azure）
-   **レイアウトの自動計算**：アーキテクチャ図、フローチャート、スイムレーン図／BPMN、シーケンス図、マインドマップ、組織図では、AI は構造だけ——何が何を含むか、何が何を指すか——を指定し、座標・サイズ・矢印の経路はすべてアプリが計算します。コンテナは必ず中身が収まるサイズになり、同じ階層の要素が重なることはなく、矢印は本来通り抜けてしまう図形を避けて引かれます。その後に手で動かしたり色を変えた部分は図の一部として読み戻されるため、次の編集で元に戻されることはありません。
 -   **アニメーションコネクタ**：より良い可視化のためにダイアグラム要素間に動的でアニメーション化されたコネクタを作成

-## MCPサーバー
+## MCPサーバー（プレビュー）
+
+> **プレビュー機能**：この機能は実験的であり、安定しない可能性があります。

 MCP（Model Context Protocol）を介して、Claude Desktop、Cursor、VS CodeなどのAIエージェントでNext AI Draw.ioを使用できます。

@@ -195,16 +196,14 @@ Next.jsアプリをデプロイする最も簡単な方法は、Next.jsの作成

 ## マルチプロバイダーサポート

-   [ByteDance Doubao](https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio)
+-   [ByteDance Doubao](https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project)
 -   AWS Bedrock（デフォルト）
 -   OpenAI
 -   Anthropic
 -   Google AI
-   Google Vertex AI
 -   Azure OpenAI
 -   Ollama
 -   OpenRouter
-   AIHubMix
 -   DeepSeek
 -   SiliconFlow
 -   ModelScope
@@ -215,20 +214,10 @@ AWS BedrockとOpenRouter以外のすべてのプロバイダーはカスタム

 📖 **[詳細なプロバイダー設定ガイド](./ai-providers.md)** - 各プロバイダーの設定手順をご覧ください。

-### サーバーサイドマルチモデル設定
-
-管理者は、ユーザーが個人のAPIキーを提供することなく利用できる複数のサーバーサイドモデルを設定できます。`AI_MODELS_CONFIG` 環境変数（JSON文字列）または `ai-models.json` ファイルで設定します。同一プロバイダー内の複数モデルだけが必要な場合は、`AI_MODEL` にカンマ区切りでモデルIDを列挙する簡易設定も使えます。
-
 **モデル要件**：このタスクは厳密なフォーマット制約（draw.io XML）を持つ長文テキスト生成を伴うため、強力なモデル機能が必要です。Claude Sonnet 4.5、GPT-5.1、Gemini 3 Pro、DeepSeek V3.2/R1を推奨します。

 注：`claude`シリーズはAWS、Azure、GCPなどのクラウドアーキテクチャロゴ付きのdraw.ioダイアグラムで学習されているため、クラウドアーキテクチャダイアグラムを作成したい場合は最適な選択です。

-### 管理パネル
-
-`ADMIN_PASSWORD` 環境変数を設定して `/admin` にアクセスすると、`.env` を手動で編集する代わりに Web パネルでサーバー設定（モデル、アクセスコード、機能、可観測性、クォータ）を管理できます。
-
-📖 **[管理パネルガイド](./admin-panel.md)** — 有効化の方法、優先順位ルール、注意事項。
-

 ## 仕組み

@@ -243,7 +232,7 @@ AWS BedrockとOpenRouter以外のすべてのプロバイダーはカスタム

 ## サポート＆お問い合わせ

-**デモサイトのAPIトークン使用を支援してくださった[ByteDance Doubao](https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio)に特別な感謝を申し上げます！** ARKプラットフォームに登録すると、50万トークンが無料でもらえます！
+**デモサイトのAPIトークン使用を支援してくださった[ByteDance Doubao](https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project)に特別な感謝を申し上げます！** ARKプラットフォームに登録すると、50万トークンが無料でもらえます！

 このプロジェクトが役に立ったら、ライブデモサイトのホスティングを支援するために[スポンサー](https://github.com/sponsors/DayuanJiang)をご検討ください！

@@ -1,24 +0,0 @@
-# 管理パネル
-
-`.env` を手動で編集する代わりに、Web 管理パネルでサーバー設定を管理できます。
-
-## パネルの有効化
-
-1. `ADMIN_PASSWORD` 環境変数を設定します（未設定の場合、パネルは無効になります）。
-2. `/admin` にアクセスしてサインインします。
-
-## 設定できる項目
-
-1. **Models（モデル）** — アプリ内のモデル設定と同じ UI で、プロバイダーの API キーとモデルリストを追加します。保存するとそれらは全ユーザーが利用できるサーバーサイドモデルになり、リクエスト時に環境の `AI_MODELS_CONFIG` / `ai-models.json` とマージされます（パネルがこれらの環境ファイルを変更することはありません）。
-2. **その他のセクション** — アクセスコード、生成パラメータ、機能、可観測性、クォータ。保存された設定は `data/settings.json` に書き込まれ、即座に反映されます — 再起動は不要です（Langfuse や DynamoDB など一部の設定は「再起動が必要」と表示されます）。
-
-## 優先順位
-
-パネルで保存された設定は環境変数を上書きし、環境変数は組み込みのデフォルト値を上書きします。保存した値を削除すると環境変数にフォールバックします。
-
-## 注意事項
-
- シークレットは `data/settings.json` に平文で保存されます（ファイルモード 600）。このファイルは非公開に保ってください。
- サーバーレスプラットフォーム（Vercel、Cloudflare Workers）には永続ディスクがないため、パネルは読み取り専用です — その環境では環境変数で設定してください。
- Docker 使用時は、`data/` ディレクトリが `docker-compose.yml` のボリュームで永続化されます。
- `NEXT_PUBLIC_*` 変数はビルド時に固定され、パネルでは変更できません。
@@ -13,7 +13,7 @@

 ### Doubao (ByteDance Volcengine)

-> **無料トークン**: [Volcengine ARK プラットフォーム](https://www.volcengine.com/activity/codingplan?ac=MMAP8JTTCAQ2&rc=Z9Z3LDTJ&utm_campaign=drawio&utm_content=drawio&utm_medium=devrel&utm_source=OWO&utm_term=drawio)に登録すると、すべてのモデルで使える50万トークンが無料で入手できます！
+> **無料トークン**: [Volcengine ARK プラットフォーム](https://console.volcengine.com/ark/region:ark+cn-beijing/overview?briefPage=0&briefType=introduce&type=new&utm_campaign=doubao&utm_content=aidrawio&utm_medium=github&utm_source=coopensrc&utm_term=project)に登録すると、すべてのモデルで使える50万トークンが無料で入手できます！

 ```bash
 DOUBAO_API_KEY=your_api_key
@@ -46,21 +46,6 @@ AI_MODEL=gpt-4o
 OPENAI_BASE_URL=https://your-custom-endpoint/v1
 ```

-### AIHubMix
-
-AIHubMix は、単一の API キーで Claude、GPT、Gemini、DeepSeek などのモデルへのアクセスを提供します。
-
-```bash
-AIHUBMIX_API_KEY=your_api_key
-AI_MODEL=claude-sonnet-4-5-20250929
-```
-
-任意のカスタムエンドポイント:
-
-```bash
-AIHUBMIX_BASE_URL=https://aihubmix.com/v1
-```
-
 ### Anthropic

 ```bash
@@ -68,13 +53,6 @@ ANTHROPIC_API_KEY=your_api_key
 AI_MODEL=claude-sonnet-4-5-20250514
 ```

-または、Bearer 認証トークンを使用することもできます（OAuth スタイルのトークンを発行するゲートウェイ経由で利用する場合など）。`ANTHROPIC_AUTH_TOKEN` は `Authorization: Bearer <token>` ヘッダーで送信され、`ANTHROPIC_API_KEY` は `x-api-key` ヘッダーで送信されます。両者は排他的なので、いずれか一方のみを設定してください:
-
-```bash
-ANTHROPIC_AUTH_TOKEN=your_auth_token
-AI_MODEL=claude-sonnet-4-5-20250514
-```
-
 任意のカスタムエンドポイント:

 ```bash
@@ -229,98 +207,6 @@ AI_MODEL=openai/gpt-4o

 [Vercel AI Gateway ダッシュボード](https://vercel.com/ai-gateway)から API キーを取得してください。

-### MiniMax
-
-MiniMax は 2 つの API 形式をサポートしています：
- **Anthropic 互換**（`/anthropic` エンドポイント）— 推奨、インターリーブ思考をサポート
- **OpenAI 互換**（`/v1` エンドポイント）— 標準 OpenAI チャット補完形式
-
-```bash
-MINIMAX_API_KEY=your_api_key
-AI_MODEL=MiniMax-M3
-```
-
-オプション設定：
-
-```bash
-# 中国大陸版、Anthropic 互換（デフォルト）
-MINIMAX_BASE_URL=https://api.minimaxi.com/anthropic
-
-# 中国大陸版、OpenAI 互換
-MINIMAX_BASE_URL=https://api.minimaxi.com/v1
-
-# 国際版、Anthropic 互換
-MINIMAX_BASE_URL=https://api.minimax.io/anthropic
-
-# 国際版、OpenAI 互換
-MINIMAX_BASE_URL=https://api.minimax.io/v1
-```
-
-### GLM (Zhipu AI)
-
-```bash
-GLM_API_KEY=your_api_key
-AI_MODEL=glm-4
-```
-
-オプションのカスタムエンドポイント：
-
-```bash
-GLM_BASE_URL=https://your-custom-endpoint
-```
-
-### Qwen (Alibaba Cloud)
-
-```bash
-QWEN_API_KEY=your_api_key
-AI_MODEL=qwen-turbo
-```
-
-オプションのカスタムエンドポイント：
-
-```bash
-QWEN_BASE_URL=https://your-custom-endpoint
-```
-
-### Kimi (Moonshot AI)
-
-```bash
-KIMI_API_KEY=your_api_key
-AI_MODEL=kimi-latest
-```
-
-オプションのカスタムエンドポイント：
-
-```bash
-KIMI_BASE_URL=https://your-custom-endpoint
-```
-
-### Qiniu (Qiniu Cloud)
-
-```bash
-QINIU_API_KEY=your_api_key
-AI_MODEL=your_model_id
-```
-
-オプションのカスタムエンドポイント：
-
-```bash
-QINIU_BASE_URL=https://your-custom-endpoint
-```
-
-### MiMo (Xiaomi)
-
-```bash
-MIMO_API_KEY=your_api_key
-AI_MODEL=mimo-v2.5-pro
-```
-
-オプションのカスタムエンドポイント（Token Plan 加入者は専用の Base URL を設定してください）：
-
-```bash
-MIMO_BASE_URL=https://token-plan-cn.xiaomimimo.com/v1
-```
-
 ## 自動検出

 **1つ**のプロバイダーの API キーのみを設定した場合、システムはそのプロバイダーを自動的に検出して使用します。`AI_PROVIDER` を設定する必要はありません。
@@ -328,77 +214,9 @@ MIMO_BASE_URL=https://token-plan-cn.xiaomimimo.com/v1
 **複数**の API キーを設定する場合は、`AI_PROVIDER` を明示的に設定する必要があります:

 ```bash
-AI_PROVIDER=google  # または: openai, anthropic, aihubmix, deepseek, siliconflow, doubao, azure, bedrock, openrouter, ollama, gateway, sglang, modelscope, minimax, glm, qwen, kimi, qiniu, mimo
+AI_PROVIDER=google  # または: openai, anthropic, deepseek, siliconflow, doubao, azure, bedrock, openrouter, ollama, gateway, sglang
 ```

-## サーバーサイドマルチモデル設定
-
-管理者は、ユーザーが個人のAPIキーを提供することなく利用できる複数のサーバーサイドモデルを設定できます。
-
-### 設定方法
-
-**方法1：環境変数**（クラウドデプロイ推奨）
-
-`AI_MODELS_CONFIG` をJSON文字列として設定：
-
-```bash
-AI_MODELS_CONFIG='{"providers":[{"name":"OpenAI","provider":"openai","models":["gpt-4o"],"default":true}]}'
-```
-
-**方法2：設定ファイル**
-
-プロジェクトルートに `ai-models.json` ファイルを作成します（または `AI_MODELS_CONFIG_PATH` でパスを指定）。
-
-**方法3：`AI_MODEL` をカンマ区切りで指定**（単一プロバイダーの簡易設定）
-
-同一プロバイダー内の複数モデルだけを公開したい場合は、`AI_MODEL` にカンマ区切りで列挙できます。最初のモデルがデフォルトになります。
-
-```bash
-AI_PROVIDER=doubao
-AI_MODEL=doubao-seed-1-8-251215,doubao-seed-1-6-flash,doubao-seed-1-6-pro
-```
-
-これは等価な `ai-models.json` の簡易表記です。複数のプロバイダーや、カスタム `apiKeyEnv` / `baseUrlEnv` を使う場合は、方法1または方法2を使ってください。
-
-### 設定例
-
-```json
-{
-  "providers": [
-    {
-      "name": "OpenAI Production",
-      "provider": "openai",
-      "models": ["gpt-4o", "gpt-4o-mini"],
-      "default": true
-    },
-    {
-      "name": "Custom DeepSeek",
-      "provider": "deepseek",
-      "models": ["deepseek-chat"],
-      "apiKeyEnv": "MY_DEEPSEEK_KEY",
-      "baseUrlEnv": "MY_DEEPSEEK_URL"
-    }
-  ]
-}
-```
-
-### フィールド説明
-
-| フィールド | 必須 | 説明 |
-|------------|------|------|
-| `name` | はい | 表示名（同一プロバイダーの複数設定をサポート） |
-| `provider` | はい | プロバイダータイプ（`openai`, `anthropic`, `google`, `bedrock` など） |
-| `models` | はい | モデルIDのリスト |
-| `default` | いいえ | `true` に設定すると、そのプロバイダーの最初のモデルがデフォルトで選択されます |
-| `apiKeyEnv` | いいえ | カスタムAPIキー環境変数名（デフォルトは `OPENAI_API_KEY` などの標準変数） |
-| `baseUrlEnv` | いいえ | カスタムBase URL環境変数名 |
-
-### 備考
-
- APIキーと認証情報は環境変数で提供します。デフォルトは標準変数名（例：`OPENAI_API_KEY`）を使用しますが、`apiKeyEnv` でカスタム変数名を指定できます。
- `name` フィールドにより同一プロバイダーの複数設定が可能です（例：「OpenAI Production」と「OpenAI Staging」が両方とも `provider: "openai"` を使用しつつ、異なる `apiKeyEnv` を持つ）。
- 設定が存在しない場合、アプリは `AI_PROVIDER`/`AI_MODEL` 環境変数設定にフォールバックします。
-
 ## モデル性能要件

 このタスクは、厳密なフォーマット制約（draw.io XML）を伴う長文テキストの生成を含むため、非常に強力なモデル性能が必要です。
@@ -1,367 +0,0 @@
-# material_design
-
-**Type:** SVG images (Google Material Icons CDN)
-**URL Pattern:** `https://fonts.gstatic.com/s/i/materialicons/{icon_name}/v6/24px.svg`
-
-## Usage
-
-```xml
-<mxCell value="label" style="image;aspect=fixed;html=1;image=https://fonts.gstatic.com/s/i/materialicons/{icon_name}/v6/24px.svg;verticalLabelPosition=bottom;verticalAlign=top;align=center;" vertex="1" parent="1">
-  <mxGeometry x="0" y="0" width="48" height="48" as="geometry" />
-</mxCell>
-```
-
-Replace `{icon_name}` with any icon name from the list below.
-
-## action (115)
-
- `account_balance`
- `account_balance_wallet`
- `account_box`
- `account_circle`
- `add_shopping_cart`
- `admin_panel_settings`
- `analytics`
- `arrow_right_alt`
- `article`
- `assessment`
- `assignment`
- `assignment_ind`
- `assignment_turned_in`
- `autorenew`
- `bookmark`
- `bookmark_border`
- `build`
- `calendar_month`
- `calendar_today`
- `card_giftcard`
- `check_circle`
- `check_circle_outline`
- `code`
- `contact_support`
- `credit_card`
- `dashboard`
- `date_range`
- `delete`
- `delete_forever`
- `delete_outline`
- `description`
- `dns`
- `done`
- `done_all`
- `done_outline`
- `drag_indicator`
- `event`
- `exit_to_app`
- `explore`
- `face`
- `fact_check`
- `favorite`
- `favorite_border`
- `feedback`
- `filter_alt`
- `fingerprint`
- `flight_takeoff`
- `grade`
- `help`
- `help_outline`
- `highlight_off`
- `history`
- `home`
- `info`
- `label`
- `language`
- `launch`
- `leaderboard`
- `lightbulb`
- `list`
- `lock`
- `lock_open`
- `login`
- `logout`
- `manage_accounts`
- `note_add`
- `open_in_full`
- `open_in_new`
- `paid`
- `payment`
- `pending`
- `pending_actions`
- `perm_identity`
- `pets`
- `power_settings_new`
- `preview`
- `print`
- `published_with_changes`
- `question_answer`
- `receipt`
- `reorder`
- `report_problem`
- `room`
- `savings`
- `schedule`
- `search`
- `settings`
- `shopping_bag`
- `shopping_basket`
- `shopping_cart`
- `star_rate`
- `stars`
- `store`
- `supervisor_account`
- `swap_horiz`
- `sync_alt`
- `task_alt`
- `thumb_up`
- `thumb_up_off_alt`
- `timeline`
- `tips_and_updates`
- `today`
- `touch_app`
- `trending_up`
- `update`
- `verified`
- `verified_user`
- `view_in_ar`
- `view_list`
- `visibility`
- `visibility_off`
- `watch_later`
- `work`
- `work_outline`
- `zoom_in`
-
-## alert (4)
-
- `error`
- `error_outline`
- `warning`
- `warning_amber`
-
-## av (12)
-
- `library_books`
- `mic`
- `pause`
- `play_arrow`
- `play_circle`
- `play_circle_filled`
- `play_circle_outline`
- `replay`
- `skip_next`
- `videocam`
- `volume_off`
- `volume_up`
-
-## communication (13)
-
- `alternate_email`
- `business`
- `call`
- `chat`
- `chat_bubble_outline`
- `email`
- `forum`
- `list_alt`
- `location_on`
- `mail_outline`
- `phone`
- `qr_code_scanner`
- `vpn_key`
-
-## content (27)
-
- `add`
- `add_box`
- `add_circle`
- `add_circle_outline`
- `block`
- `bolt`
- `calculate`
- `clear`
- `content_copy`
- `create`
- `filter_list`
- `flag`
- `how_to_reg`
- `insights`
- `inventory`
- `inventory_2`
- `link`
- `mail`
- `push_pin`
- `remove`
- `remove_circle`
- `remove_circle_outline`
- `reply`
- `save`
- `send`
- `sort`
- `undo`
-
-## device (9)
-
- `dark_mode`
- `devices`
- `light_mode`
- `password`
- `restart_alt`
- `sell`
- `signal_cellular_alt`
- `summarize`
- `task`
-
-## editor (9)
-
- `attach_file`
- `attach_money`
- `bar_chart`
- `checklist`
- `edit_note`
- `format_list_bulleted`
- `mode_edit`
- `monetization_on`
- `post_add`
-
-## file (8)
-
- `cloud_upload`
- `download`
- `file_download`
- `file_upload`
- `folder`
- `folder_open`
- `grid_view`
- `upload_file`
-
-## hardware (6)
-
- `computer`
- `keyboard_arrow_down`
- `keyboard_arrow_right`
- `phone_iphone`
- `security`
- `smartphone`
-
-## image (16)
-
- `add_a_photo`
- `auto_awesome`
- `auto_stories`
- `circle`
- `collections`
- `edit`
- `image`
- `navigate_before`
- `navigate_next`
- `palette`
- `photo_camera`
- `picture_as_pdf`
- `receipt_long`
- `remove_red_eye`
- `timer`
- `tune`
-
-## maps (11)
-
- `badge`
- `category`
- `directions_car`
- `local_fire_department`
- `local_offer`
- `local_shipping`
- `map`
- `menu_book`
- `place`
- `restaurant`
- `volunteer_activism`
-
-## navigation (29)
-
- `apps`
- `arrow_back`
- `arrow_back_ios`
- `arrow_back_ios_new`
- `arrow_downward`
- `arrow_drop_down`
- `arrow_drop_up`
- `arrow_forward`
- `arrow_forward_ios`
- `arrow_right`
- `arrow_upward`
- `campaign`
- `cancel`
- `check`
- `chevron_left`
- `chevron_right`
- `close`
- `double_arrow`
- `east`
- `expand_less`
- `expand_more`
- `fullscreen`
- `menu`
- `menu_open`
- `more_horiz`
- `more_vert`
- `payments`
- `refresh`
- `unfold_more`
-
-## notification (6)
-
- `account_tree`
- `event_available`
- `priority_high`
- `support_agent`
- `sync`
- `wifi`
-
-## places (2)
-
- `apartment`
- `storefront`
-
-## search (2)
-
- `feed`
- `manage_search`
-
-## social (23)
-
- `construction`
- `emoji_emotions`
- `emoji_events`
- `engineering`
- `group`
- `group_add`
- `groups`
- `health_and_safety`
- `notifications`
- `notifications_active`
- `notifications_none`
- `people`
- `people_alt`
- `person`
- `person_add`
- `person_outline`
- `psychology`
- `public`
- `school`
- `share`
- `thumb_up_alt`
- `travel_explore`
- `water_drop`
-
-## toggle (8)
-
- `check_box`
- `check_box_outline_blank`
- `radio_button_checked`
- `radio_button_unchecked`
- `star`
- `star_border`
- `star_outline`
- `toggle_on`
-
-Total: 300 icons (top by popularity from 2100+ available)
@@ -10,13 +10,8 @@ directories:
 afterPack: ./scripts/afterPack.cjs

 files:
-  - from: dist-electron
-    to: dist-electron
-    filter:
-      - "**/*"
-  - from: .
-    filter:
-      - package.json
+  - dist-electron/**/*
+  - "!node_modules"

 asarUnpack:
  - "**/*.node"
@@ -42,11 +37,10 @@ mac:
      arch:
        - x64
        - arm64
-  # Disable electron-builder's signing - we use custom ad-hoc signing in afterPack
-  # to properly sign nested bundles with --deep flag for bundled draw.io files
-  identity: null
-  hardenedRuntime: false
+  hardenedRuntime: true
  gatekeeperAssess: false
+  entitlements: resources/entitlements.mac.plist
+  entitlementsInherit: resources/entitlements.mac.plist

 dmg:
  contents:
@@ -95,10 +89,6 @@ linux:
      arch:
        - x64
        - arm64
-    - target: rpm
-      arch:
-        - x64
-        - arm64

 # Publish configuration (optional)
 publish:
@@ -38,12 +38,6 @@ interface SetProxyResult {
    devMode?: boolean
 }

-/** Result of setting user locale */
-interface SetUserLocaleResult {
-    success: boolean
-    error?: string
-}
-
 declare global {
    interface Window {
        /** Main window Electron API */
@@ -68,12 +62,6 @@ declare global {
            getProxy: () => Promise<ProxyConfig>
            /** Set proxy configuration (saves and restarts server) */
            setProxy: (config: ProxyConfig) => Promise<SetProxyResult>
-            /** Get user's preferred locale */
-            getUserLocale: () => Promise<
-                "en" | "zh" | "ja" | "zh-Hant" | undefined
-            >
-            /** Set user's preferred locale */
-            setUserLocale: (locale: string) => Promise<SetUserLocaleResult>
        }

        /** Settings window Electron API */
@@ -100,10 +88,4 @@ declare global {
    }
 }

-export type {
-    ApplyPresetResult,
-    ConfigPreset,
-    ProxyConfig,
-    SetProxyResult,
-    SetUserLocaleResult,
-}
+export { ConfigPreset, ApplyPresetResult, ProxyConfig, SetProxyResult }
@@ -12,12 +12,11 @@ import {
    getCurrentPresetId,
    setCurrentPreset,
 } from "./config-manager"
-import { getMenuTranslations, getPreferredLocale } from "./menu-i18n"
 import { restartNextServer } from "./next-server"
 import { showSettingsWindow } from "./settings-window"

 /**
- * Build and set the application menu with i18n support
+ * Build and set the application menu
 */
 export function buildAppMenu(): void {
    const template = getMenuTemplate()
@@ -26,22 +25,18 @@ export function buildAppMenu(): void {
 }

 /**
- * Rebuild the menu (call this when presets change or language changes)
+ * Rebuild the menu (call this when presets change)
 */
 export function rebuildAppMenu(): void {
    buildAppMenu()
 }

 /**
- * Get the menu template with translations
+ * Get the menu template
 */
 function getMenuTemplate(): MenuItemConstructorOptions[] {
    const isMac = process.platform === "darwin"

-    // Get translations for preferred locale (saved preference or system default)
-    const locale = getPreferredLocale(app.getLocale())
-    const t = getMenuTranslations(locale)
-
    const template: MenuItemConstructorOptions[] = []

    // macOS app menu
@@ -49,10 +44,10 @@ function getMenuTemplate(): MenuItemConstructorOptions[] {
        template.push({
            label: app.name,
            submenu: [
-                { role: "about" }, // System-translated
+                { role: "about" },
                { type: "separator" },
                {
-                    label: t.settings,
+                    label: "Settings...",
                    accelerator: "CmdOrCtrl+,",
                    click: () => {
                        const win = BrowserWindow.getFocusedWindow()
@@ -60,26 +55,26 @@ function getMenuTemplate(): MenuItemConstructorOptions[] {
                    },
                },
                { type: "separator" },
-                { role: "services" }, // System-translated
+                { role: "services" },
                { type: "separator" },
-                { role: "hide" }, // System-translated
-                { role: "hideOthers" }, // System-translated
-                { role: "unhide" }, // System-translated
+                { role: "hide" },
+                { role: "hideOthers" },
+                { role: "unhide" },
                { type: "separator" },
-                { role: "quit" }, // System-translated
+                { role: "quit" },
            ],
        })
    }

    // File menu
    template.push({
-        label: t.file,
+        label: "File",
        submenu: [
            ...(isMac
                ? []
                : [
                      {
-                          label: t.settings,
+                          label: "Settings",
                          accelerator: "CmdOrCtrl+,",
                          click: () => {
                              const win = BrowserWindow.getFocusedWindow()
@@ -88,76 +83,76 @@ function getMenuTemplate(): MenuItemConstructorOptions[] {
                      },
                      { type: "separator" } as MenuItemConstructorOptions,
                  ]),
-            isMac ? { role: "close" } : { role: "quit" }, // System-translated
+            isMac ? { role: "close" } : { role: "quit" },
        ],
    })

    // Edit menu
    template.push({
-        label: t.edit,
+        label: "Edit",
        submenu: [
-            { role: "undo" }, // System-translated
-            { role: "redo" }, // System-translated
+            { role: "undo" },
+            { role: "redo" },
            { type: "separator" },
-            { role: "cut" }, // System-translated
-            { role: "copy" }, // System-translated
-            { role: "paste" }, // System-translated
+            { role: "cut" },
+            { role: "copy" },
+            { role: "paste" },
            ...(isMac
                ? [
                      {
                          role: "pasteAndMatchStyle",
-                      } as MenuItemConstructorOptions, // System-translated
-                      { role: "delete" } as MenuItemConstructorOptions, // System-translated
-                      { role: "selectAll" } as MenuItemConstructorOptions, // System-translated
+                      } as MenuItemConstructorOptions,
+                      { role: "delete" } as MenuItemConstructorOptions,
+                      { role: "selectAll" } as MenuItemConstructorOptions,
                  ]
                : [
-                      { role: "delete" } as MenuItemConstructorOptions, // System-translated
+                      { role: "delete" } as MenuItemConstructorOptions,
                      { type: "separator" } as MenuItemConstructorOptions,
-                      { role: "selectAll" } as MenuItemConstructorOptions, // System-translated
+                      { role: "selectAll" } as MenuItemConstructorOptions,
                  ]),
        ],
    })

    // View menu
    template.push({
-        label: t.view,
+        label: "View",
        submenu: [
-            { role: "reload" }, // System-translated
-            { role: "forceReload" }, // System-translated
-            { role: "toggleDevTools" }, // System-translated
+            { role: "reload" },
+            { role: "forceReload" },
+            { role: "toggleDevTools" },
            { type: "separator" },
-            { role: "resetZoom" }, // System-translated
-            { role: "zoomIn" }, // System-translated
-            { role: "zoomOut" }, // System-translated
+            { role: "resetZoom" },
+            { role: "zoomIn" },
+            { role: "zoomOut" },
            { type: "separator" },
-            { role: "togglefullscreen" }, // System-translated
+            { role: "togglefullscreen" },
        ],
    })

    // Configuration menu with presets
-    template.push(buildConfigMenu(t))
+    template.push(buildConfigMenu())

    // Window menu
    template.push({
-        label: t.window,
+        label: "Window",
        submenu: [
-            { role: "minimize" }, // System-translated
-            { role: "zoom" }, // System-translated
+            { role: "minimize" },
+            { role: "zoom" },
            ...(isMac
                ? [
                      { type: "separator" } as MenuItemConstructorOptions,
-                      { role: "front" } as MenuItemConstructorOptions, // System-translated
+                      { role: "front" } as MenuItemConstructorOptions,
                  ]
-                : [{ role: "close" } as MenuItemConstructorOptions]), // System-translated
+                : [{ role: "close" } as MenuItemConstructorOptions]),
        ],
    })

    // Help menu
    template.push({
-        label: t.help,
+        label: "Help",
        submenu: [
            {
-                label: t.documentation,
+                label: "Documentation",
                click: async () => {
                    await shell.openExternal(
                        "https://github.com/dayuanjiang/next-ai-draw-io",
@@ -165,7 +160,7 @@ function getMenuTemplate(): MenuItemConstructorOptions[] {
                },
            },
            {
-                label: t.reportIssue,
+                label: "Report Issue",
                click: async () => {
                    await shell.openExternal(
                        "https://github.com/dayuanjiang/next-ai-draw-io/issues",
@@ -181,9 +176,7 @@ function getMenuTemplate(): MenuItemConstructorOptions[] {
 /**
 * Build the Configuration menu with presets
 */
-function buildConfigMenu(
-    t: ReturnType<typeof getMenuTranslations>,
-): MenuItemConstructorOptions {
+function buildConfigMenu(): MenuItemConstructorOptions {
    const presets = getAllPresets()
    const currentPresetId = getCurrentPresetId()

@@ -223,11 +216,11 @@ function buildConfigMenu(
    }))

    return {
-        label: t.configuration,
+        label: "Configuration",
        submenu: [
            ...(presetItems.length > 0
                ? [
-                      { label: t.switchPreset, enabled: false },
+                      { label: "Switch Preset", enabled: false },
                      { type: "separator" } as MenuItemConstructorOptions,
                      ...presetItems,
                      { type: "separator" } as MenuItemConstructorOptions,
@@ -236,8 +229,8 @@ function buildConfigMenu(
            {
                label:
                    presetItems.length > 0
-                        ? t.managePresets
-                        : t.addConfigurationPreset,
+                        ? "Manage Presets..."
+                        : "Add Configuration Preset...",
                click: () => {
                    const win = BrowserWindow.getFocusedWindow()
                    showSettingsWindow(win || undefined)
@@ -137,7 +137,6 @@ interface ConfigPresetsFile {
    version: 1
    currentPresetId: string | null
    presets: ConfigPreset[]
-    userLocale?: "en" | "zh" | "ja" | "zh-Hant"
 }

 const CONFIG_FILE_NAME = "config-presets.json"
@@ -162,7 +161,6 @@ export function loadPresets(): ConfigPresetsFile {
            version: 1,
            currentPresetId: null,
            presets: [],
-            userLocale: undefined,
        }
    }

@@ -183,7 +181,6 @@ export function loadPresets(): ConfigPresetsFile {
            version: 1,
            currentPresetId: null,
            presets: [],
-            userLocale: undefined,
        }
    }
 }
@@ -359,9 +356,9 @@ const PROVIDER_ENV_MAP: Record<string, { apiKey: string; baseUrl: string }> = {
        baseUrl: "MODELSCOPE_BASE_URL",
    },
    gateway: { apiKey: "AI_GATEWAY_API_KEY", baseUrl: "AI_GATEWAY_BASE_URL" },
-    // bedrock doesn't use API keys in the same way
+    // bedrock and ollama don't use API keys in the same way
    bedrock: { apiKey: "", baseUrl: "" },
-    ollama: { apiKey: "OLLAMA_API_KEY", baseUrl: "OLLAMA_BASE_URL" },
+    ollama: { apiKey: "", baseUrl: "OLLAMA_BASE_URL" },
 }

 /**
@@ -465,23 +462,3 @@ export function getCurrentPresetEnv(): Record<string, string> {
    }
    return env
 }
-
-/**
- * Get user's preferred locale from config
- * Returns undefined if not set
- */
-export function getUserLocale(): "en" | "zh" | "ja" | "zh-Hant" | undefined {
-    const data = loadPresets()
-    return data.userLocale
-}
-
-/**
- * Set user's preferred locale in config
- */
-export function setUserLocale(
-    locale: "en" | "zh" | "ja" | "zh-Hant" | null,
-): void {
-    const data = loadPresets()
-    data.userLocale = locale === null ? undefined : locale
-    savePresets(data)
-}
@@ -94,8 +94,7 @@ if (!gotTheLock) {
            if (
                url.includes("diagrams.net") ||
                url.includes("draw.io") ||
-                url.startsWith("http://localhost") ||
-                url.startsWith("http://127.0.0.1")
+                url.startsWith("http://localhost")
            ) {
                return { action: "allow" }
            }
@@ -1,5 +1,4 @@
 import { app, BrowserWindow, dialog, ipcMain } from "electron"
-import { rebuildAppMenu } from "./app-menu"
 import {
    applyPresetToEnv,
    type ConfigPreset,
@@ -8,9 +7,7 @@ import {
    getAllPresets,
    getCurrentPreset,
    getCurrentPresetId,
-    getUserLocale,
    setCurrentPreset,
-    setUserLocale,
    updatePreset,
 } from "./config-manager"
 import { restartNextServer } from "./next-server"
@@ -254,32 +251,4 @@ export function registerIpcHandlers(): void {
            }
        }
    })
-
-    // ==================== User Locale ====================
-
-    ipcMain.handle("get-user-locale", () => {
-        return getUserLocale()
-    })
-
-    ipcMain.handle("set-user-locale", (_event, locale: string) => {
-        // Validate locale is one of the supported values
-        if (!["en", "zh", "ja", "zh-Hant"].includes(locale)) {
-            return { success: false, error: "Invalid locale" }
-        }
-
-        try {
-            setUserLocale(locale as "en" | "zh" | "ja" | "zh-Hant")
-            // Rebuild the menu to reflect the new locale
-            rebuildAppMenu()
-            return { success: true }
-        } catch (error) {
-            return {
-                success: false,
-                error:
-                    error instanceof Error
-                        ? error.message
-                        : "Failed to set locale",
-            }
-        }
-    })
 }
@@ -1,211 +0,0 @@
-/**
- * Internationalization support for Electron menu
- * Translations for menu labels that don't use Electron's built-in roles
- */
-
-import { getUserLocale } from "./config-manager"
-
-export type MenuLocale = "en" | "zh" | "ja" | "zh-Hant"
-
-export interface MenuTranslations {
-    // App menu (macOS only)
-    settings: string
-
-    // File menu
-    file: string
-
-    // Edit menu
-    edit: string
-
-    // View menu
-    view: string
-
-    // Configuration menu
-    configuration: string
-    switchPreset: string
-    managePresets: string
-    addConfigurationPreset: string
-
-    // Window menu
-    window: string
-
-    // Help menu
-    help: string
-    documentation: string
-    reportIssue: string
-}
-
-const translations: Record<MenuLocale, MenuTranslations> = {
-    en: {
-        // App menu
-        settings: "Settings...",
-
-        // File menu
-        file: "File",
-
-        // Edit menu
-        edit: "Edit",
-
-        // View menu
-        view: "View",
-
-        // Configuration menu
-        configuration: "Configuration",
-        switchPreset: "Switch Preset",
-        managePresets: "Manage Presets...",
-        addConfigurationPreset: "Add Configuration Preset...",
-
-        // Window menu
-        window: "Window",
-
-        // Help menu
-        help: "Help",
-        documentation: "Documentation",
-        reportIssue: "Report Issue",
-    },
-
-    zh: {
-        // App menu
-        settings: "设置...",
-
-        // File menu
-        file: "文件",
-
-        // Edit menu
-        edit: "编辑",
-
-        // View menu
-        view: "查看",
-
-        // Configuration menu
-        configuration: "配置",
-        switchPreset: "切换预设",
-        managePresets: "管理预设...",
-        addConfigurationPreset: "添加配置预设...",
-
-        // Window menu
-        window: "窗口",
-
-        // Help menu
-        help: "帮助",
-        documentation: "文档",
-        reportIssue: "报告问题",
-    },
-
-    ja: {
-        // App menu
-        settings: "設定...",
-
-        // File menu
-        file: "ファイル",
-
-        // Edit menu
-        edit: "編集",
-
-        // View menu
-        view: "表示",
-
-        // Configuration menu
-        configuration: "設定",
-        switchPreset: "プリセット切り替え",
-        managePresets: "プリセット管理...",
-        addConfigurationPreset: "設定プリセットを追加...",
-
-        // Window menu
-        window: "ウインドウ",
-
-        // Help menu
-        help: "ヘルプ",
-        documentation: "ドキュメント",
-        reportIssue: "問題を報告",
-    },
-
-    "zh-Hant": {
-        // App menu
-        settings: "設定...",
-
-        // File menu
-        file: "檔案",
-
-        // Edit menu
-        edit: "編輯",
-
-        // View menu
-        view: "檢視",
-
-        // Configuration menu
-        configuration: "配置",
-        switchPreset: "切換預設",
-        managePresets: "管理預設...",
-        addConfigurationPreset: "新增配置預設...",
-
-        // Window menu
-        window: "視窗",
-
-        // Help menu
-        help: "說明",
-        documentation: "文件",
-        reportIssue: "回報問題",
-    },
-}
-
-/**
- * Get menu translations for a given locale
- * Falls back to English if locale is not supported
- */
-export function getMenuTranslations(locale: string): MenuTranslations {
-    // Check for zh-Hant before normalizing
-    if (
-        locale === "zh-Hant" ||
-        locale.toLowerCase().startsWith("zh-hant") ||
-        locale.toLowerCase().startsWith("zh-tw") ||
-        locale.toLowerCase().startsWith("zh-hk")
-    ) {
-        return translations["zh-Hant"]
-    }
-
-    // Normalize locale (e.g., "zh-CN" -> "zh", "ja-JP" -> "ja")
-    const normalized = locale.toLowerCase().split("-")[0]
-
-    if (normalized === "zh") return translations.zh
-    if (normalized === "ja") return translations.ja
-    return translations.en
-}
-
-/**
- * Detect system locale from Electron app
- * Returns one of: "en", "zh", "ja", "zh-Hant"
- */
-export function detectSystemLocale(appLocale: string): MenuLocale {
-    const lower = appLocale.toLowerCase()
-
-    // Distinguish Traditional Chinese locales (TW, HK, Hant) from Simplified
-    if (
-        lower.startsWith("zh-hant") ||
-        lower.startsWith("zh-tw") ||
-        lower.startsWith("zh-hk")
-    ) {
-        return "zh-Hant"
-    }
-
-    const normalized = lower.split("-")[0]
-
-    if (normalized === "zh") return "zh"
-    if (normalized === "ja") return "ja"
-    return "en"
-}
-
-/**
- * Get locale from stored preference or system default
- * Checks config file for user's language preference first
- */
-export function getPreferredLocale(appLocale: string): MenuLocale {
-    // Try to get from saved preference first
-    const savedLocale = getUserLocale()
-    if (savedLocale) {
-        return savedLocale
-    }
-
-    // Fall back to system locale
-    return detectSystemLocale(appLocale)
-}
@@ -68,7 +68,7 @@ export async function startNextServer(): Promise<string> {
    const env: Record<string, string> = {
        NODE_ENV: "production",
        PORT: String(port),
-        HOSTNAME: "127.0.0.1",
+        HOSTNAME: "localhost",
        // Enable Node.js built-in proxy support for fetch (Node.js 24+)
        NODE_USE_ENV_PROXY: "1",
    }
@@ -9,11 +9,9 @@ import { app } from "electron"
 const PORT_CONFIG = {
    // Development mode uses fixed port for hot reload compatibility
    development: 6002,
-    // Legacy production port — tried first to preserve localStorage for existing users
-    legacyProduction: 61337,
-    // New production port below the ephemeral range (49152-65535)
-    // to avoid conflicts with Windows Hyper-V / ephemeral port reservations
-    production: 13370,
+    // Production mode uses fixed port (61337) to preserve localStorage
+    // Falls back to sequential ports if unavailable
+    production: 61337,
    // Maximum attempts to find an available port (fallback)
    maxAttempts: 100,
 }
@@ -29,10 +27,7 @@ let allocatedPort: number | null = null
 export function isPortAvailable(port: number): Promise<boolean> {
    return new Promise((resolve) => {
        const server = net.createServer()
-        server.once("error", (err: NodeJS.ErrnoException) => {
-            console.warn(`Port ${port} unavailable: ${err.code}`)
-            resolve(false)
-        })
+        server.once("error", () => resolve(false))
        server.once("listening", () => {
            server.close()
            resolve(true)
@@ -44,12 +39,12 @@ export function isPortAvailable(port: number): Promise<boolean> {
 /**
 * Find an available port
 * - In development: uses fixed port (6002)
- * - In production: uses fixed port (13370) to preserve localStorage
+ * - In production: uses fixed port (61337) to preserve localStorage
 * - Falls back to sequential ports if preferred port is unavailable
- * - Last resort: lets the OS assign a port (port 0)
 *
 * @param reuseExisting If true, try to reuse the previously allocated port
 * @returns Promise<number> The available port
+ * @throws Error if no available port found after max attempts
 */
 export async function findAvailablePort(reuseExisting = true): Promise<number> {
    const isDev = !app.isPackaged
@@ -69,16 +64,7 @@ export async function findAvailablePort(reuseExisting = true): Promise<number> {
        allocatedPort = null
    }

-    // In production, try legacy port first to preserve existing users' localStorage
-    if (!isDev) {
-        const legacyPort = PORT_CONFIG.legacyProduction
-        if (await isPortAvailable(legacyPort)) {
-            allocatedPort = legacyPort
-            return legacyPort
-        }
-    }
-
-    // Try preferred port
+    // Try preferred port first
    if (await isPortAvailable(preferredPort)) {
        allocatedPort = preferredPort
        return preferredPort
@@ -98,23 +84,9 @@ export async function findAvailablePort(reuseExisting = true): Promise<number> {
        }
    }

-    // Last resort: let the OS pick an available port
-    console.warn(
-        "All sequential ports failed. Requesting OS-assigned port (localStorage may not persist across restarts).",
+    throw new Error(
+        `Failed to find available port after ${PORT_CONFIG.maxAttempts} attempts`,
    )
-    const osPort = await new Promise<number>((resolve, reject) => {
-        const server = net.createServer()
-        server.once("error", reject)
-        server.once("listening", () => {
-            const addr = server.address()
-            const port = (addr as net.AddressInfo).port
-            server.close(() => resolve(port))
-        })
-        server.listen(0, "127.0.0.1")
-    })
-    allocatedPort = osPort
-    console.log(`OS assigned port: ${osPort}`)
-    return osPort
 }

 /**
@@ -141,5 +113,5 @@ export function getServerUrl(): string {
            "No port allocated yet. Call findAvailablePort() first.",
        )
    }
-    return `http://127.0.0.1:${allocatedPort}`
+    return `http://localhost:${allocatedPort}`
 }
@@ -60,24 +60,13 @@ export function createWindow(serverUrl: string): BrowserWindow {
        mainWindow.webContents.openDevTools()
    }

-    // Override the draw.io iframe's beforeunload handler so the window can
-    // close after the user edits text in a shape (fixes #815). Diagrams are
-    // already persisted via autosave, so the prompt is unnecessary.
-    mainWindow.webContents.on("will-prevent-unload", (event) => {
-        event.preventDefault()
-    })
-
    mainWindow.on("closed", () => {
        mainWindow = null
    })

    // Handle page title updates
    mainWindow.webContents.on("page-title-updated", (event, title) => {
-        if (
-            title &&
-            !title.includes("localhost") &&
-            !title.includes("127.0.0.1")
-        ) {
+        if (title && !title.includes("localhost")) {
            mainWindow?.setTitle(title)
        } else {
            event.preventDefault()
@@ -26,9 +26,4 @@ contextBridge.exposeInMainWorld("electronAPI", {
    getProxy: () => ipcRenderer.invoke("get-proxy"),
    setProxy: (config: { httpProxy?: string; httpsProxy?: string }) =>
        ipcRenderer.invoke("set-proxy", config),
-
-    // User locale settings
-    getUserLocale: () => ipcRenderer.invoke("get-user-locale"),
-    setUserLocale: (locale: string) =>
-        ipcRenderer.invoke("set-user-locale", locale),
 })
@@ -1,14 +1,10 @@
 # AI Provider Configuration
 # AI_PROVIDER: Which provider to use
-# Options: bedrock, openai, anthropic, google, vertexai, azure, ollama, openrouter, aihubmix, deepseek, siliconflow, gateway, novita
+# Options: bedrock, openai, anthropic, google, azure, ollama, openrouter, deepseek, siliconflow, gateway
 # Default: bedrock
 AI_PROVIDER=bedrock

 # AI_MODEL: The model ID for your chosen provider (REQUIRED)
-# Tip: For a single-provider quick multi-model setup, list comma-separated model IDs.
-# The first one becomes the default and the rest appear in the model picker.
-# For multiple providers or custom apiKeyEnv/baseUrlEnv, use AI_MODELS_CONFIG / ai-models.json instead.
-# Example: AI_MODEL=doubao-seed-1-8-251215,doubao-seed-1-6-flash,doubao-seed-1-6-pro
 AI_MODEL=global.anthropic.claude-sonnet-4-5-20250929-v1:0

 # AWS Bedrock Configuration
@@ -29,8 +25,7 @@ AI_MODEL=global.anthropic.claude-sonnet-4-5-20250929-v1:0
 # OPENAI_REASONING_SUMMARY=detailed  # Optional: Override reasoning summary (none/brief/detailed)

 # Anthropic (Direct) Configuration
-# ANTHROPIC_API_KEY=sk-ant-...                 # Sent as `x-api-key` header
-# ANTHROPIC_AUTH_TOKEN=                        # Alternative to ANTHROPIC_API_KEY; sent as `Authorization: Bearer` header (mutually exclusive)
+# ANTHROPIC_API_KEY=sk-ant-...
 # ANTHROPIC_BASE_URL=https://your-custom-anthropic/v1
 # ANTHROPIC_THINKING_TYPE=enabled            # Optional: Anthropic extended thinking (enabled)
 # ANTHROPIC_THINKING_BUDGET_TOKENS=12000     # Optional: Budget for extended thinking in tokens
@@ -45,14 +40,6 @@ AI_MODEL=global.anthropic.claude-sonnet-4-5-20250929-v1:0
 # GOOGLE_THINKING_BUDGET=8192                # Optional: Gemini 2.5 thinking budget in tokens (for more/less thinking)
 # GOOGLE_THINKING_LEVEL=high                 # Optional: Gemini 3 thinking level (low/high)

-# Google Vertex AI Configuration (Enterprise GCP)
-# For enterprise users needing data residency, VPC Service Controls, or GCP integration
-# GOOGLE_VERTEX_API_KEY=                          # Required: Express Mode API key
-# GOOGLE_VERTEX_BASE_URL=https://...              # Optional: Custom endpoint URL
-# Note: Gemini 2.5/3 models automatically enable reasoning display (includeThoughts: true)
-# GOOGLE_VERTEX_THINKING_BUDGET=8192              # Optional: Gemini 2.5 thinking budget in tokens (1024-100000)
-# GOOGLE_VERTEX_THINKING_LEVEL=high               # Optional: Gemini 3 thinking level (minimal/low/medium/high)
-
 # Azure OpenAI Configuration
 # Configure endpoint using ONE of these methods:
 #   1. AZURE_RESOURCE_NAME - SDK constructs: https://{name}.openai.azure.com/openai/v1{path}
@@ -64,19 +51,14 @@ AI_MODEL=global.anthropic.claude-sonnet-4-5-20250929-v1:0
 # AZURE_REASONING_EFFORT=low                 # Optional: Azure reasoning effort (low, medium, high)
 # AZURE_REASONING_SUMMARY=detailed

-# Ollama Configuration (Local or Cloud)
-# OLLAMA_BASE_URL=https://ollama.com/api  # Optional, defaults to Ollama Cloud
-# OLLAMA_API_KEY=your-ollama-cloud-api-key    # Optional: For Ollama Cloud or authenticated remote instances
+# Ollama (Local) Configuration
+# OLLAMA_BASE_URL=http://localhost:11434/api  # Optional, defaults to localhost
 # OLLAMA_ENABLE_THINKING=true                 # Optional: Enable thinking for models that support it (e.g., qwen3)

 # OpenRouter Configuration
 # OPENROUTER_API_KEY=sk-or-v1-...
 # OPENROUTER_BASE_URL=https://openrouter.ai/api/v1  # Optional: Custom endpoint

-# AIHubMix Configuration
-# AIHUBMIX_API_KEY=your-aihubmix-api-key
-# AIHUBMIX_BASE_URL=https://aihubmix.com/v1  # Optional: Custom endpoint
-
 # DeepSeek Configuration
 # DEEPSEEK_API_KEY=sk-...
 # DEEPSEEK_BASE_URL=https://api.deepseek.com/v1  # Optional: Custom endpoint
@@ -111,11 +93,6 @@ AI_MODEL=global.anthropic.claude-sonnet-4-5-20250929-v1:0
 # LANGFUSE_SECRET_KEY=sk-lf-...
 # LANGFUSE_BASEURL=https://cloud.langfuse.com  # EU region, use https://us.cloud.langfuse.com for US

-# Optional server-side multi-model configuration
-# If set, points to a JSON file with server-provided models (see README for schema).
-# Default: ./ai-models.json in project root
-# AI_MODELS_CONFIG_PATH=/path/to/ai-models.json
-
 # Temperature (Optional)
 # Controls randomness in AI responses. Lower = more deterministic.
 # Leave unset for models that don't support temperature (e.g., GPT-5.1 reasoning models)
@@ -124,14 +101,6 @@ AI_MODEL=global.anthropic.claude-sonnet-4-5-20250929-v1:0
 # Access Control (Optional)
 # ACCESS_CODE_LIST=your-secret-code,another-code

-# Admin Panel (Optional)
-# Set a password to enable the web admin panel at /admin, where most of the
-# settings in this file can be edited at runtime (stored in data/settings.json,
-# which takes precedence over environment variables).
-# Leave unset to disable the admin panel entirely.
-# ADMIN_PASSWORD=your-admin-password
-# SETTINGS_FILE=./data/settings.json  # Optional: custom settings file location
-
 # Draw.io Configuration (Optional)
 # NEXT_PUBLIC_DRAWIO_BASE_URL=https://embed.diagrams.net  # Default: https://embed.diagrams.net
 # Use this to point to a self-hosted draw.io instance
@@ -147,55 +116,3 @@ AI_MODEL=global.anthropic.claude-sonnet-4-5-20250929-v1:0
 # Enabled by default. Set to "false" to disable.
 # ENABLE_PDF_INPUT=true
 # NEXT_PUBLIC_MAX_EXTRACTED_CHARS=150000  # Max characters for PDF/text extraction (default: 150000)
-
-# Security Settings (Optional)
-# Allow private/internal URLs for reverse proxy setups (default: true)
-# Set to "false" to block private IPs, localhost, and internal hostnames
-# ALLOW_PRIVATE_URLS=false
-
-# Self-hosted deployment (Optional)
-# Self-hosted users may implement custom quota-management solutions,
-# which triggers the client UI to display messages suggesting self-hosting or sponsorship.
-# This switch allows self-hosted users to provide custom messages in response to a 429 code,
-# in messageTokenSelfHosted, messageApiSelfHosted, and tipSelfHosted translation strings.
-# NEXT_PUBLIC_SELFHOSTED=true
-
-# Minimax Configuration (Optional)
-# Get your API key from: https://platform.minimaxi.com/docs/guides/models-intro
-# MINIMAX_API_KEY=your_minimax_api_key
-# MINIMAX_BASE_URL=https://api.minimaxi.com/anthropic  # Optional, default (China mainland)
-
-# GLM Configuration (Optional)
-# Get your API key from: https://open.bigmodel.cn/dev/api
-# GLM_API_KEY=your_glm_api_key
-# GLM_BASE_URL=https://open.bigmodel.cn/api/paas/v4  # Optional, default
-
-# Qwen Configuration (Optional)
-# Get your API key from: https://www.aliyun.com/product/bailian
-# QWEN_API_KEY=your_qwen_api_key
-# QWEN_BASE_URL=https://dashscope.aliyuncs.com/compatible-mode/v1  # Optional, default
-
-# Kimi Configuration (Optional)
-# Get your API key from: https://platform.moonshot.cn/
-# KIMI_API_KEY=your_kimi_api_key
-# KIMI_BASE_URL=https://api.moonshot.cn/v1  # Optional, default
-
-# Qiniu Configuration (Optional)
-# Get your API key from: https://www.qiniu.com/ai/models
-# QINIU_API_KEY=your_qiniu_api_key
-# QINIU_BASE_URL=https://api.qnaigc.com/v1  # Optional, default
-
-# Novita AI Configuration (Optional)
-# Get your API key from: https://novita.ai/dashboard/key
-# NOVITA_API_KEY=your_novita_api_key
-# NOVITA_BASE_URL=https://api.novita.ai/openai  # Optional, default
-
-# MiMo (Xiaomi) Configuration (Optional)
-# Get your API key from: https://platform.xiaomimimo.com/
-# MIMO_API_KEY=your_mimo_api_key
-# MIMO_BASE_URL=https://api.xiaomimimo.com/v1  # Optional, default. Token Plan users: https://token-plan-cn.xiaomimimo.com/v1
-
-# Atlas Cloud Configuration (Optional)
-# Get your API key from: https://www.atlascloud.ai/console/api-keys
-# ATLASCLOUD_API_KEY=your_atlascloud_api_key
-# ATLASCLOUD_BASE_URL=https://api.atlascloud.ai/v1  # Optional, default. LLM chat endpoint; media generation uses a separate API.
@@ -1,15 +1,6 @@
 import type { MutableRefObject } from "react"
-import { useRef } from "react"
 import type { DiagramOperation } from "@/components/chat/types"
-import type {
-    ValidationState,
-    ValidationStatus,
-} from "@/components/chat/ValidationCard"
-import type { Operation } from "@/lib/diagram-engine"
-import { restructureDiagram } from "@/lib/diagram-engine"
-import type { ValidationResult } from "@/lib/diagram-validator"
-import { formatValidationFeedback } from "@/lib/diagram-validator"
-import { isMxCellXmlComplete, isRealDiagram, wrapWithMxFile } from "@/lib/utils"
+import { isMxCellXmlComplete, wrapWithMxFile } from "@/lib/utils"

 const DEBUG = process.env.NODE_ENV === "development"

@@ -39,14 +30,6 @@ type AddToolOutputParams = AddToolOutputSuccess | AddToolOutputError

 type AddToolOutputFn = (params: AddToolOutputParams) => void

-const MAX_VALIDATION_RETRIES = 3
-
-// Type for the validation function passed from useValidateDiagram hook
-type ValidateDiagramFn = (
-    imageData: string,
-    sessionId?: string,
-) => Promise<ValidationResult>
-
 interface UseDiagramToolHandlersParams {
    partialXmlRef: MutableRefObject<string>
    editDiagramOriginalXmlRef: MutableRefObject<Map<string, string>>
@@ -54,20 +37,11 @@ interface UseDiagramToolHandlersParams {
    onDisplayChart: (xml: string, skipValidation?: boolean) => string | null
    onFetchChart: (saveToHistory?: boolean) => Promise<string>
    onExport: () => void
-    captureValidationPng?: () => Promise<string | null>
-    validateDiagram?: ValidateDiagramFn
-    enableVlmValidation?: boolean
-    sessionId?: string
-    onValidationStateChange?: (
-        toolCallId: string,
-        state: ValidationState,
-    ) => void
 }

 /**
 * Hook that creates the onToolCall handler for diagram-related tools.
- * Handles edit_diagram and restructure_diagram, plus the cached-XML replay that arrives
- * as display_diagram.
+ * Handles display_diagram, edit_diagram, and append_diagram tools.
 *
 * Note: addToolOutput is passed at call time (not hook init) because
 * it comes from useChat which creates a circular dependency.
@@ -79,34 +53,7 @@ export function useDiagramToolHandlers({
    onDisplayChart,
    onFetchChart,
    onExport,
-    captureValidationPng,
-    validateDiagram,
-    enableVlmValidation = true,
-    sessionId,
-    onValidationStateChange,
 }: UseDiagramToolHandlersParams) {
-    // Track validation retry count per tool call
-    const validationRetryCountRef = useRef<Map<string, number>>(new Map())
-
-    // Helper to update validation state
-    const updateValidationState = (
-        toolCallId: string,
-        status: ValidationStatus,
-        options?: {
-            attempt?: number
-            maxAttempts?: number
-            result?: ValidationResult
-            error?: string
-            imageData?: string
-        },
-    ) => {
-        if (onValidationStateChange) {
-            onValidationStateChange(toolCallId, {
-                status,
-                ...options,
-            })
-        }
-    }
    const handleToolCall = async (
        { toolCall }: { toolCall: ToolCall },
        addToolOutput: AddToolOutputFn,
@@ -121,36 +68,107 @@ export function useDiagramToolHandlers({
            await handleDisplayDiagram(toolCall, addToolOutput)
        } else if (toolCall.toolName === "edit_diagram") {
            await handleEditDiagram(toolCall, addToolOutput)
-        } else if (toolCall.toolName === "restructure_diagram") {
-            await handleRestructureDiagram(toolCall, addToolOutput)
+        } else if (toolCall.toolName === "append_diagram") {
+            handleAppendDiagram(toolCall, addToolOutput)
        }
    }

-    // Replays a cached XML answer onto the canvas. The model can no longer call this tool —
-    // it only arrives from the server's cache-hit path (see createCachedStreamResponse), which
-    // speaks the same wire format. So there is no truncation to continue and no model to send
-    // errors back to: load it, or report that it did not load.
    const handleDisplayDiagram = async (
        toolCall: ToolCall,
        addToolOutput: AddToolOutputFn,
    ) => {
        const { xml } = toolCall.input as { xml: string }
-        const validationError = onDisplayChart(wrapWithMxFile(xml))
-        if (validationError) {
-            console.warn("[display_diagram] Validation error:", validationError)
+
+        // DEBUG: Log raw input to diagnose false truncation detection
+        if (DEBUG) {
+            console.log(
+                "[display_diagram] XML ending (last 100 chars):",
+                xml.slice(-100),
+            )
+            console.log("[display_diagram] XML length:", xml.length)
+        }
+
+        // Check if XML is truncated (incomplete mxCell indicates truncated output)
+        const isTruncated = !isMxCellXmlComplete(xml)
+        if (DEBUG) {
+            console.log("[display_diagram] isTruncated:", isTruncated)
+        }
+
+        if (isTruncated) {
+            // Store the partial XML for continuation via append_diagram
+            partialXmlRef.current = xml
+
+            // Tell LLM to use append_diagram to continue
+            const partialEnding = partialXmlRef.current.slice(-500)
            addToolOutput({
                tool: "display_diagram",
                toolCallId: toolCall.toolCallId,
                state: "output-error",
-                errorText: validationError,
+                errorText: `Output was truncated due to length limits. Use the append_diagram tool to continue.
+
+Your output ended with:
+\`\`\`
+${partialEnding}
+\`\`\`
+
+NEXT STEP: Call append_diagram with the continuation XML.
+- Do NOT include wrapper tags or root cells (id="0", id="1")
+- Start from EXACTLY where you stopped
+- Complete all remaining mxCell elements`,
            })
            return
        }
-        addToolOutput({
-            tool: "display_diagram",
-            toolCallId: toolCall.toolCallId,
-            output: "Successfully displayed the diagram.",
-        })
+
+        // Complete XML received - use it directly
+        // (continuation is now handled via append_diagram tool)
+        const finalXml = xml
+        partialXmlRef.current = "" // Reset any partial from previous truncation
+
+        // Wrap raw XML with full mxfile structure for draw.io
+        const fullXml = wrapWithMxFile(finalXml)
+
+        // loadDiagram validates and returns error if invalid
+        const validationError = onDisplayChart(fullXml)
+
+        if (validationError) {
+            console.warn("[display_diagram] Validation error:", validationError)
+            // Return error to model - sendAutomaticallyWhen will trigger retry
+            if (DEBUG) {
+                console.log(
+                    "[display_diagram] Adding tool output with state: output-error",
+                )
+            }
+            addToolOutput({
+                tool: "display_diagram",
+                toolCallId: toolCall.toolCallId,
+                state: "output-error",
+                errorText: `${validationError}
+
+Please fix the XML issues and call display_diagram again with corrected XML.
+
+Your failed XML:
+\`\`\`xml
+${finalXml}
+\`\`\``,
+            })
+        } else {
+            // Success - diagram will be rendered by chat-message-display
+            if (DEBUG) {
+                console.log(
+                    "[display_diagram] Success! Adding tool output with state: output-available",
+                )
+            }
+            addToolOutput({
+                tool: "display_diagram",
+                toolCallId: toolCall.toolCallId,
+                output: "Successfully displayed the diagram.",
+            })
+            if (DEBUG) {
+                console.log(
+                    "[display_diagram] Tool output added. Diagram should be visible now.",
+                )
+            }
+        }
    }

    const handleEditDiagram = async (
@@ -263,77 +281,97 @@ Current diagram XML:
 ${currentXml || "No XML available"}
 \`\`\`

-Please check cell IDs and retry, or rebuild with restructure_diagram.`,
+Please check cell IDs and retry, or use display_diagram to regenerate.`,
            })
            // Clean up the shared original XML ref even on error
            editDiagramOriginalXmlRef.current.delete(toolCall.toolCallId)
        }
    }

-    /**
-     * Structural editing. The model sends operations against the tree; the engine
-     * re-derives that tree from whatever is on the canvas right now — including anything
-     * the user moved or recoloured by hand — applies the operations, recomputes every
-     * coordinate, and returns new XML.
-     *
-     * Nothing about the tree is stored between calls, so there is no second copy of the
-     * state to drift out of sync with the canvas.
-     */
-    const handleRestructureDiagram = async (
+    const handleAppendDiagram = (
        toolCall: ToolCall,
        addToolOutput: AddToolOutputFn,
    ) => {
-        const { operations } = toolCall.input as { operations: Operation[] }
+        const { xml } = toolCall.input as { xml: string }

-        // Read the live canvas, not the last thing we generated: the user may have
-        // edited it since.
-        let currentXml = ""
-        try {
-            currentXml = await onFetchChart(false)
-        } catch {
-            currentXml = chartXMLRef.current ?? ""
-        }
-        if (!isRealDiagram(currentXml)) currentXml = ""
+        // Detect if LLM incorrectly started fresh instead of continuing
+        // LLM should only output bare mxCells now, so wrapper tags indicate error
+        const trimmed = xml.trim()
+        const isFreshStart =
+            trimmed.startsWith("<mxGraphModel") ||
+            trimmed.startsWith("<root") ||
+            trimmed.startsWith("<mxfile") ||
+            trimmed.startsWith('<mxCell id="0"') ||
+            trimmed.startsWith('<mxCell id="1"')

-        const result = restructureDiagram(currentXml, operations)
-
-        if (result.errors.length > 0 || !result.xml) {
+        if (isFreshStart) {
            addToolOutput({
-                tool: "restructure_diagram",
+                tool: "append_diagram",
                toolCallId: toolCall.toolCallId,
                state: "output-error",
-                errorText: `Could not apply the operations:
-${result.errors.map((e) => `- ${e}`).join("\n")}
+                errorText: `ERROR: You started fresh with wrapper tags. Do NOT include wrapper tags or root cells (id="0", id="1").

-Structure as it stands:
-${result.outline}
+Continue from EXACTLY where the partial ended:
+\`\`\`
+${partialXmlRef.current.slice(-500)}
+\`\`\`

-Fix the operations and call restructure_diagram again.`,
+Start your continuation with the NEXT character after where it stopped.`,
            })
            return
        }

-        const loadError = onDisplayChart(result.xml)
-        if (loadError) {
+        // Append to accumulated XML
+        partialXmlRef.current += xml
+
+        // Check if XML is now complete (last mxCell is complete)
+        const isComplete = isMxCellXmlComplete(partialXmlRef.current)
+
+        if (isComplete) {
+            // Wrap and display the complete diagram
+            const finalXml = partialXmlRef.current
+            partialXmlRef.current = "" // Reset
+
+            const fullXml = wrapWithMxFile(finalXml)
+            const validationError = onDisplayChart(fullXml)
+
+            if (validationError) {
+                addToolOutput({
+                    tool: "append_diagram",
+                    toolCallId: toolCall.toolCallId,
+                    state: "output-error",
+                    errorText: `Validation error after assembly: ${validationError}
+
+Assembled XML:
+\`\`\`xml
+${finalXml.substring(0, 2000)}...
+\`\`\`
+
+Please use display_diagram with corrected XML.`,
+                })
+            } else {
+                addToolOutput({
+                    tool: "append_diagram",
+                    toolCallId: toolCall.toolCallId,
+                    output: "Diagram assembly complete and displayed successfully.",
+                })
+            }
+        } else {
+            // Still incomplete - signal to continue
            addToolOutput({
-                tool: "restructure_diagram",
+                tool: "append_diagram",
                toolCallId: toolCall.toolCallId,
                state: "output-error",
-                errorText: `The diagram was built but draw.io rejected it: ${loadError}`,
-            })
-            return
-        }
+                errorText: `XML still incomplete (mxCell not closed). Call append_diagram again to continue.

-        // Report the outline rather than the XML: it is what the model needs to name ids
-        // in the next call, at a fraction of the tokens.
-        const notes = result.warnings.length
-            ? `\n\nNotes:\n${result.warnings.map((w) => `- ${w}`).join("\n")}`
-            : ""
-        addToolOutput({
-            tool: "restructure_diagram",
-            toolCallId: toolCall.toolCallId,
-            output: `Diagram updated.\n\n${result.outline}${notes}`,
-        })
+Current ending:
+\`\`\`
+${partialXmlRef.current.slice(-500)}
+\`\`\`
+
+Continue from EXACTLY where you stopped.`,
+            })
+        }
    }

    return { handleToolCall }
@@ -1,8 +1,6 @@
 "use client"

 import { useCallback, useEffect, useState } from "react"
-import { getApiEndpoint } from "@/lib/base-path"
-import type { FlattenedServerModel } from "@/lib/server-model-config"
 import { STORAGE_KEYS } from "@/lib/storage"
 import {
    createEmptyConfig,
@@ -134,56 +132,14 @@ export interface UseModelConfigReturn {
 export function useModelConfig(): UseModelConfigReturn {
    const [config, setConfig] = useState<MultiModelConfig>(createEmptyConfig)
    const [isLoaded, setIsLoaded] = useState(false)
-    const [serverModels, setServerModels] = useState<FlattenedServerModel[]>([])
-    const [serverLoaded, setServerLoaded] = useState(false)

-    // Load client config on mount
+    // Load config on mount
    useEffect(() => {
        const loaded = loadConfig()
        setConfig(loaded)
        setIsLoaded(true)
    }, [])

-    // Load server models on mount (if any)
-    useEffect(() => {
-        if (typeof window === "undefined") return
-
-        fetch(getApiEndpoint("/api/server-models"))
-            .then((res) => {
-                if (!res.ok) {
-                    console.error(
-                        "Failed to load server models:",
-                        res.status,
-                        res.statusText,
-                    )
-                    throw new Error(`Request failed with status ${res.status}`)
-                }
-                return res.json()
-            })
-            .then((data) => {
-                const raw: FlattenedServerModel[] = data?.models || []
-                setServerModels(raw)
-                setServerLoaded(true)
-
-                // Auto-select default server model if no model is currently selected
-                setConfig((prev) => {
-                    if (!prev.selectedModelId && raw.length > 0) {
-                        const defaultModel = raw.find((m) => m.isDefault)
-                        if (defaultModel) {
-                            return { ...prev, selectedModelId: defaultModel.id }
-                        }
-                        // If no default marked, use first server model
-                        return { ...prev, selectedModelId: raw[0].id }
-                    }
-                    return prev
-                })
-            })
-            .catch((error) => {
-                console.error("Error while loading server models:", error)
-                setServerLoaded(true)
-            })
-    }, [])
-
    // Save config whenever it changes (after initial load)
    useEffect(() => {
        if (isLoaded) {
@@ -192,33 +148,9 @@ export function useModelConfig(): UseModelConfigReturn {
    }, [config, isLoaded])

    // Derived state
-    const userModels = flattenModels(config)
-
-    const models: FlattenedModel[] = [
-        // Server models (read-only, credentials from env)
-        ...serverModels.map((m) => ({
-            id: m.id,
-            modelId: m.modelId,
-            provider: m.provider,
-            providerLabel: `Server · ${m.providerLabel}`,
-            apiKey: "",
-            baseUrl: undefined,
-            awsAccessKeyId: undefined,
-            awsSecretAccessKey: undefined,
-            awsRegion: undefined,
-            awsSessionToken: undefined,
-            validated: true,
-            source: "server" as const,
-            isDefault: m.isDefault,
-            apiKeyEnv: m.apiKeyEnv,
-            baseUrlEnv: m.baseUrlEnv,
-        })),
-        // User models from local configuration
-        ...userModels,
-    ]
-
+    const models = flattenModels(config)
    const selectedModel = config.selectedModelId
-        ? models.find((m) => m.id === config.selectedModelId)
+        ? findModelById(config, config.selectedModelId)
        : undefined

    // Actions
@@ -350,7 +282,7 @@ export function useModelConfig(): UseModelConfigReturn {

    return {
        config,
-        isLoaded: isLoaded && serverLoaded,
+        isLoaded,
        models,
        selectedModel,
        selectedModelId: config.selectedModelId,
@@ -382,10 +314,6 @@ export function getSelectedAIConfig(): {
    awsSecretAccessKey: string
    awsRegion: string
    awsSessionToken: string
-    // Selected model ID (for server model lookup)
-    selectedModelId: string
-    // Vertex AI credentials (Express Mode)
-    vertexApiKey: string
 } {
    const empty = {
        accessCode: "",
@@ -397,8 +325,6 @@ export function getSelectedAIConfig(): {
        awsSecretAccessKey: "",
        awsRegion: "",
        awsSessionToken: "",
-        selectedModelId: "",
-        vertexApiKey: "",
    }

    if (typeof window === "undefined") return empty
@@ -421,8 +347,6 @@ export function getSelectedAIConfig(): {
            awsSecretAccessKey: "",
            awsRegion: "",
            awsSessionToken: "",
-            selectedModelId: "",
-            vertexApiKey: "",
        }
    }

@@ -433,32 +357,12 @@ export function getSelectedAIConfig(): {
        return { ...empty, accessCode }
    }

-    // No selected model = use server default (AI_PROVIDER/AI_MODEL/env auto-detect)
+    // No selected model = use server default
    if (!config.selectedModelId) {
        return { ...empty, accessCode }
    }

-    // Server-side model selection (id = "server:<name-slug>:<modelId>")
-    // Provider is resolved server-side via findServerModelById()
-    if (config.selectedModelId.startsWith("server:")) {
-        const parts = config.selectedModelId.split(":")
-        const nameSlug = parts[1] || ""
-        const modelId = parts.slice(2).join(":") // Preserve Bedrock-style IDs
-
-        return {
-            ...empty,
-            accessCode,
-            // Note: nameSlug is NOT the provider, but we send it for backwards compat
-            // Server uses selectedModelId to lookup the actual provider
-            aiProvider: nameSlug,
-            aiBaseUrl: "",
-            aiApiKey: "",
-            aiModel: modelId,
-            selectedModelId: config.selectedModelId,
-        }
-    }
-
-    // Find selected user-defined model
+    // Find selected model
    const model = findModelById(config, config.selectedModelId)
    if (!model) {
        return { ...empty, accessCode }
@@ -475,8 +379,5 @@ export function getSelectedAIConfig(): {
        awsSecretAccessKey: model.awsSecretAccessKey || "",
        awsRegion: model.awsRegion || "",
        awsSessionToken: model.awsSessionToken || "",
-        selectedModelId: config.selectedModelId || "",
-        // Vertex AI credentials (Express Mode)
-        vertexApiKey: model.vertexApiKey || "",
    }
 }
@@ -1,136 +0,0 @@
-"use client"
-
-/**
- * Hook for VLM-based diagram validation using AI SDK's useObject.
- */
-
-import { experimental_useObject as useObject } from "@ai-sdk/react"
-import { useCallback, useRef } from "react"
-import { getApiEndpoint } from "@/lib/base-path"
-import {
-    type ValidationResult,
-    ValidationResultSchema,
-} from "@/lib/validation-schema"
-
-export type { ValidationResult }
-
-// Default valid result for fallback cases
-const DEFAULT_VALID_RESULT: ValidationResult = {
-    valid: true,
-    issues: [],
-    suggestions: [],
-}
-
-interface UseValidateDiagramOptions {
-    onSuccess?: (result: ValidationResult) => void
-    onError?: (error: Error) => void
-}
-
-// Track pending validation promises for imperative API
-type PendingValidation = {
-    resolve: (result: ValidationResult) => void
-    reject: (error: Error) => void
-}
-
-export function useValidateDiagram(options: UseValidateDiagramOptions = {}) {
-    const { onSuccess, onError } = options
-    const pendingValidationRef = useRef<PendingValidation | null>(null)
-
-    const { object, submit, isLoading, error, stop } = useObject({
-        api: getApiEndpoint("/api/validate-diagram"),
-        schema: ValidationResultSchema,
-        onFinish: ({
-            object,
-            error: finishError,
-        }: {
-            object: ValidationResult | undefined
-            error: Error | undefined
-        }) => {
-            if (finishError) {
-                console.error(
-                    "[useValidateDiagram] Validation error:",
-                    finishError,
-                )
-                onError?.(finishError)
-                pendingValidationRef.current?.reject(finishError)
-                pendingValidationRef.current = null
-                return
-            }
-
-            if (object) {
-                const result = object as ValidationResult
-                onSuccess?.(result)
-                pendingValidationRef.current?.resolve(result)
-                pendingValidationRef.current = null
-            }
-        },
-        onError: (err: Error) => {
-            console.error("[useValidateDiagram] Stream error:", err)
-            onError?.(err)
-            pendingValidationRef.current?.reject(err)
-            pendingValidationRef.current = null
-        },
-    })
-
-    /**
-     * Validate a diagram image.
-     * Returns a promise that resolves with the validation result.
-     */
-    const validate = useCallback(
-        async (
-            imageData: string,
-            sessionId?: string,
-        ): Promise<ValidationResult> => {
-            // Reject any pending validation to prevent promise leaks
-            if (pendingValidationRef.current) {
-                pendingValidationRef.current.reject(
-                    new Error("Validation superseded by new request"),
-                )
-                pendingValidationRef.current = null
-            }
-
-            return new Promise((resolve, reject) => {
-                // Store the promise handlers
-                pendingValidationRef.current = { resolve, reject }
-
-                // Submit the validation request
-                submit({ imageData, sessionId })
-            })
-        },
-        [submit],
-    )
-
-    /**
-     * Validate with fallback - returns default valid result on error.
-     * Use this to avoid blocking the user on validation failures.
-     */
-    const validateWithFallback = useCallback(
-        async (
-            imageData: string,
-            sessionId?: string,
-        ): Promise<ValidationResult> => {
-            try {
-                return await validate(imageData, sessionId)
-            } catch (error) {
-                console.warn(
-                    "[useValidateDiagram] Validation failed, using fallback:",
-                    error,
-                )
-                return DEFAULT_VALID_RESULT
-            }
-        },
-        [validate],
-    )
-
-    return {
-        // Validation functions
-        validate,
-        validateWithFallback,
-        stop,
-
-        // State
-        isValidating: isLoading,
-        partialResult: object as ValidationResult | undefined,
-        error,
-    }
-}
@@ -1,17 +1,7 @@
 import { LangfuseSpanProcessor } from "@langfuse/otel"
 import { NodeTracerProvider } from "@opentelemetry/sdk-trace-node"

-export async function register() {
-    // Overlay admin settings file onto process.env before anything reads config
-    if (process.env.NEXT_RUNTIME === "nodejs") {
-        try {
-            const { applyToEnv } = await import("@/lib/admin/settings")
-            applyToEnv()
-        } catch (err) {
-            console.error("[admin-settings] Failed to apply settings:", err)
-        }
-    }
-
+export function register() {
    // Skip telemetry if Langfuse env vars are not configured
    if (!process.env.LANGFUSE_PUBLIC_KEY || !process.env.LANGFUSE_SECRET_KEY) {
        console.warn(
@@ -1,37 +0,0 @@
-import { timingSafeEqual } from "crypto"
-
-// Shared auth for admin API routes: compares x-admin-password header
-// against the ADMIN_PASSWORD env var. Unset password = panel disabled.
-export function checkAdminAuth(req: Request): Response | null {
-    const password = process.env.ADMIN_PASSWORD
-    if (!password) {
-        return Response.json(
-            {
-                error: "Admin panel is disabled. Set the ADMIN_PASSWORD environment variable to enable it.",
-            },
-            { status: 403 },
-        )
-    }
-    const provided = req.headers.get("x-admin-password") || ""
-    const a = Buffer.from(provided)
-    const b = Buffer.from(password)
-    if (a.length !== b.length || !timingSafeEqual(a, b)) {
-        return Response.json(
-            { error: "Invalid admin password" },
-            { status: 401 },
-        )
-    }
-    return null
-}
-
-export interface MaskedSecret {
-    isSet: true
-    hint: string
-}
-
-export function maskSecret(value: string): MaskedSecret {
-    return {
-        isSet: true,
-        hint: value.length > 8 ? `…${value.slice(-4)}` : "••••",
-    }
-}
@@ -1,303 +0,0 @@
-import { z } from "zod"
-import {
-    ProviderNameSchema,
-    type ServerModelsConfig,
-} from "@/lib/server-model-config"
-import {
-    FIXED_CRED_PROVIDERS,
-    PROVIDER_INFO,
-    type ProviderName,
-} from "@/lib/types/model-config"
-import { type MaskedSecret, maskSecret } from "./auth"
-import { loadSettings } from "./settings"
-
-// Admin-configured providers, mirroring the user ModelConfigDialog's data
-// model but stored server-side (settings.json, ADMIN_PROVIDERS key).
-//
-// They COEXIST with an env-based AI_MODELS_CONFIG / ai-models.json:
-// loadRawServerModelsConfig() merges the env baseline with the panel's
-// providers at read time, so .env stays authoritative for its own entries.
-// Panel credentials are written to ADMIN_-prefixed env vars (wired up via
-// apiKeyEnv/baseUrlEnv) so they never shadow standard vars like
-// OPENAI_API_KEY that env-based entries may rely on.
-
-export const ADMIN_PROVIDERS_KEY = "ADMIN_PROVIDERS"
-
-// A secret field in transit: plaintext string (new value) or an
-// {isSet} marker meaning "keep the stored value".
-const SecretInputSchema = z
-    .union([z.string(), z.object({ isSet: z.literal(true), hint: z.string() })])
-    .optional()
-
-export const AdminProviderSchema = z.object({
-    id: z.string().min(1),
-    provider: ProviderNameSchema,
-    name: z.string().optional(),
-    apiKey: SecretInputSchema,
-    baseUrl: z.string().optional(),
-    awsAccessKeyId: SecretInputSchema,
-    awsSecretAccessKey: SecretInputSchema,
-    awsRegion: z.string().optional(),
-    vertexApiKey: SecretInputSchema,
-    models: z.array(z.string().min(1)),
-    isDefault: z.boolean().optional(),
-})
-
-export const AdminProvidersSchema = z.array(AdminProviderSchema)
-
-// Stored shape: secrets are plain strings (never {isSet} markers, which
-// only exist in transit). Used to validate ADMIN_PROVIDERS on load so a
-// hand-edited/corrupted value can't slip a marker object past maskSecret.
-const StoredAdminProviderSchema = AdminProviderSchema.extend({
-    apiKey: z.string().optional(),
-    awsAccessKeyId: z.string().optional(),
-    awsSecretAccessKey: z.string().optional(),
-    vertexApiKey: z.string().optional(),
-})
-
-export type AdminProviderInput = z.infer<typeof AdminProviderSchema>
-
-// Stored form: secrets are plain strings
-export interface StoredAdminProvider {
-    id: string
-    provider: ProviderName
-    name?: string
-    apiKey?: string
-    baseUrl?: string
-    awsAccessKeyId?: string
-    awsSecretAccessKey?: string
-    awsRegion?: string
-    vertexApiKey?: string
-    models: string[]
-    isDefault?: boolean
-}
-
-const SECRET_FIELDS = [
-    "apiKey",
-    "awsAccessKeyId",
-    "awsSecretAccessKey",
-    "vertexApiKey",
-] as const
-
-// ADMIN_-prefixed env var names for instance `index` (0-based) of a provider
-function credEnvNames(
-    provider: ProviderName,
-    index: number,
-): { key?: string; url?: string } {
-    if (FIXED_CRED_PROVIDERS.includes(provider) || provider === "edgeone") {
-        return {}
-    }
-    const prefix =
-        provider === "gateway" ? "AI_GATEWAY" : provider.toUpperCase()
-    const suffix = index === 0 ? "" : `_${index + 1}`
-    return {
-        key: `ADMIN_${prefix}_API_KEY${suffix}`,
-        url: `ADMIN_${prefix}_BASE_URL${suffix}`,
-    }
-}
-
-export function loadAdminProviders(): StoredAdminProvider[] {
-    const raw = loadSettings()[ADMIN_PROVIDERS_KEY]
-    if (!raw) return []
-    try {
-        const parsed = JSON.parse(raw)
-        if (!Array.isArray(parsed)) return []
-        // Validate each entry's shape — a malformed/hand-edited value must
-        // not reach runtime code that assumes provider/models exist.
-        return parsed.flatMap((entry) => {
-            const result = StoredAdminProviderSchema.safeParse(entry)
-            return result.success ? [result.data as StoredAdminProvider] : []
-        })
-    } catch {
-        console.error("[admin-providers] Failed to parse stored providers")
-        return []
-    }
-}
-
-export type MaskedAdminProvider = Omit<
-    StoredAdminProvider,
-    (typeof SECRET_FIELDS)[number]
-> & {
-    apiKey?: MaskedSecret
-    awsAccessKeyId?: MaskedSecret
-    awsSecretAccessKey?: MaskedSecret
-    vertexApiKey?: MaskedSecret
-}
-
-export function maskAdminProviders(
-    list: StoredAdminProvider[],
-): MaskedAdminProvider[] {
-    return list.map((p) => {
-        const masked: MaskedAdminProvider = { ...p } as MaskedAdminProvider
-        for (const field of SECRET_FIELDS) {
-            const value = p[field]
-            masked[field] = value ? maskSecret(value) : undefined
-        }
-        return masked
-    })
-}
-
-// Resolve {isSet} markers in incoming secrets against the stored list
-export function mergeSecrets(
-    incoming: AdminProviderInput[],
-    stored: StoredAdminProvider[],
-): StoredAdminProvider[] {
-    const storedById = new Map(stored.map((p) => [p.id, p]))
-    return incoming.map((p) => {
-        const prev = storedById.get(p.id)
-        const merged = { ...p } as StoredAdminProvider
-        for (const field of SECRET_FIELDS) {
-            const value = p[field]
-            if (typeof value === "string") {
-                merged[field] = value || undefined
-            } else if (value?.isSet) {
-                merged[field] = prev?.[field]
-            } else {
-                merged[field] = undefined
-            }
-        }
-        return merged
-    })
-}
-
-function displayName(p: StoredAdminProvider): string {
-    return p.name?.trim() || PROVIDER_INFO[p.provider].label
-}
-
-export function validateAdminProviders(
-    list: StoredAdminProvider[],
-    envConfig: ServerModelsConfig | null = null,
-): string | null {
-    const envProviders = envConfig?.providers ?? []
-    for (const single of FIXED_CRED_PROVIDERS) {
-        if (list.filter((p) => p.provider === single).length > 1) {
-            return `Only one ${PROVIDER_INFO[single].label} provider is supported (its credentials use fixed environment variables).`
-        }
-        // Its credentials are global; a panel instance would silently
-        // override the credentials env-configured models rely on
-        if (
-            list.some((p) => p.provider === single) &&
-            envProviders.some((p) => p.provider === single)
-        ) {
-            return `${PROVIDER_INFO[single].label} is already configured in AI_MODELS_CONFIG / ai-models.json and shares global credentials. Manage it via the environment configuration instead.`
-        }
-    }
-    const names = list.map((p) => displayName(p))
-    if (new Set(names).size !== names.length) {
-        return "Provider display names must be unique."
-    }
-    const envNames = new Set(envProviders.map((p) => p.name))
-    const clash = names.find((n) => envNames.has(n))
-    if (clash) {
-        return `"${clash}" is already defined in AI_MODELS_CONFIG / ai-models.json. Use a different display name.`
-    }
-    if (list.filter((p) => p.isDefault).length > 1) {
-        return "Only one provider can be the default."
-    }
-    return null
-}
-
-// The panel's contribution to the server models config, derived at read
-// time and merged with the env baseline by loadRawServerModelsConfig().
-export function adminProvidersToConfig(
-    list: StoredAdminProvider[],
-): ServerModelsConfig {
-    const config: ServerModelsConfig = { providers: [] }
-    const indexByProvider = new Map<ProviderName, number>()
-    for (const p of list) {
-        const index = indexByProvider.get(p.provider) ?? 0
-        indexByProvider.set(p.provider, index + 1)
-        if (p.models.length === 0) continue
-        const env = credEnvNames(p.provider, index)
-        config.providers.push({
-            name: displayName(p),
-            provider: p.provider,
-            models: p.models,
-            ...(env.key && p.apiKey ? { apiKeyEnv: env.key } : {}),
-            ...(env.url && p.baseUrl ? { baseUrlEnv: env.url } : {}),
-            ...(p.isDefault ? { default: true } : {}),
-        })
-    }
-    return config
-}
-
-// Settings updates derived from the provider list: credential env vars,
-// the stored list itself, and AI_PROVIDER/AI_MODEL when a default is set.
-// Keys derived from `previous` but absent now are set to null (removed,
-// falling back to the environment).
-export function deriveEnvUpdates(
-    list: StoredAdminProvider[],
-    previous: StoredAdminProvider[],
-): Record<string, string | null> {
-    const updates: Record<string, string | null> = {}
-
-    // Clear everything the previous list owned, then overwrite below
-    for (const key of derivedEnvKeys(previous)) updates[key] = null
-
-    const indexByProvider = new Map<ProviderName, number>()
-    for (const p of list) {
-        const index = indexByProvider.get(p.provider) ?? 0
-        indexByProvider.set(p.provider, index + 1)
-
-        if (p.provider === "bedrock") {
-            if (p.awsAccessKeyId) updates.AWS_ACCESS_KEY_ID = p.awsAccessKeyId
-            if (p.awsSecretAccessKey)
-                updates.AWS_SECRET_ACCESS_KEY = p.awsSecretAccessKey
-            if (p.awsRegion) updates.AWS_REGION = p.awsRegion
-        } else if (p.provider === "vertexai") {
-            if (p.vertexApiKey) updates.GOOGLE_VERTEX_API_KEY = p.vertexApiKey
-            if (p.baseUrl) updates.GOOGLE_VERTEX_BASE_URL = p.baseUrl
-        } else if (p.provider === "ollama") {
-            if (p.apiKey) updates.OLLAMA_API_KEY = p.apiKey
-            if (p.baseUrl) updates.OLLAMA_BASE_URL = p.baseUrl
-        } else {
-            const env = credEnvNames(p.provider, index)
-            if (env.key && p.apiKey) updates[env.key] = p.apiKey
-            if (env.url && p.baseUrl) updates[env.url] = p.baseUrl
-        }
-    }
-
-    updates[ADMIN_PROVIDERS_KEY] = list.length > 0 ? JSON.stringify(list) : null
-
-    // The panel's default also becomes the server-wide default model;
-    // without one, the env-configured default applies.
-    const defaultEntry = list.find((p) => p.isDefault && p.models.length > 0)
-    if (defaultEntry) {
-        updates.AI_PROVIDER = defaultEntry.provider
-        updates.AI_MODEL = defaultEntry.models[0]
-    }
-
-    return updates
-}
-
-// Every settings key the panel may have written for a given list.
-// AI_MODELS_CONFIG is included to clean up values written by older
-// versions of the panel (it is no longer written).
-function derivedEnvKeys(list: StoredAdminProvider[]): string[] {
-    const keys = new Set<string>([
-        "AI_MODELS_CONFIG",
-        "AI_PROVIDER",
-        "AI_MODEL",
-    ])
-    const indexByProvider = new Map<ProviderName, number>()
-    for (const p of list) {
-        const index = indexByProvider.get(p.provider) ?? 0
-        indexByProvider.set(p.provider, index + 1)
-        if (p.provider === "bedrock") {
-            keys.add("AWS_ACCESS_KEY_ID")
-            keys.add("AWS_SECRET_ACCESS_KEY")
-            keys.add("AWS_REGION")
-        } else if (p.provider === "vertexai") {
-            keys.add("GOOGLE_VERTEX_API_KEY")
-            keys.add("GOOGLE_VERTEX_BASE_URL")
-        } else if (p.provider === "ollama") {
-            keys.add("OLLAMA_API_KEY")
-            keys.add("OLLAMA_BASE_URL")
-        } else {
-            const env = credEnvNames(p.provider, index)
-            if (env.key) keys.add(env.key)
-            if (env.url) keys.add(env.url)
-        }
-    }
-    return [...keys]
-}
@@ -1,229 +0,0 @@
-// Declarative registry of the general env vars editable in the admin panel.
-// Drives both server-side validation (app/api/admin/settings) and UI
-// rendering (app/[lang]/admin). Keys are exactly the env var names.
-//
-// AI providers and models are managed separately in the panel's Models
-// section (lib/admin/providers.ts), not here.
-//
-// Not listed here (and therefore rejected by the API):
-// - NEXT_PUBLIC_* vars: baked into the client bundle at build time
-// - ADMIN_PASSWORD / SETTINGS_FILE: bootstrap values, env-only to avoid lockout
-// - Per-provider reasoning/thinking tuning vars: env-only (see env.example)
-
-export type SettingType = "string" | "secret" | "number" | "boolean" | "enum"
-
-export interface SettingDef {
-    key: string
-    group: string
-    type: SettingType
-    label: string
-    description?: string
-    options?: string[]
-    min?: number
-    max?: number
-    placeholder?: string
-    // Built-in default applied at runtime when the value is unset, so the UI
-    // can reflect actual behavior (e.g. ALLOW_PRIVATE_URLS defaults to "true").
-    default?: string
-    // Value is only picked up at process start (module-load readers)
-    restartRequired?: boolean
-}
-
-export interface SettingGroup {
-    id: string
-    title: string
-    description: string
-    // Optional sections gated by an on/off switch in the panel; fields are
-    // grayed out until enabled. Starts on when any field is already set.
-    toggleable?: boolean
-}
-
-export const SETTING_GROUPS: SettingGroup[] = [
-    {
-        id: "generation",
-        title: "Generation",
-        description: "Output parameters applied to all chat requests.",
-    },
-    {
-        id: "access",
-        title: "Access Control",
-        description: "Restrict who can use this deployment.",
-    },
-    {
-        id: "features",
-        title: "Features",
-        description: "Optional features and security toggles.",
-    },
-    {
-        id: "observability",
-        title: "Observability",
-        description: "Langfuse tracing for LLM calls.",
-        toggleable: true,
-    },
-    {
-        id: "quota",
-        title: "Quota & Rate Limits",
-        description:
-            "Per-IP usage limits. Enforcement requires a DynamoDB table.",
-        toggleable: true,
-    },
-]
-
-export const SETTINGS_REGISTRY: SettingDef[] = [
-    // ── Generation ───────────────────────────────────────────────────
-    {
-        key: "TEMPERATURE",
-        group: "generation",
-        type: "number",
-        label: "Temperature",
-        description:
-            "Leave unset for reasoning models that reject temperature.",
-        min: 0,
-        max: 2,
-    },
-    {
-        key: "MAX_OUTPUT_TOKENS",
-        group: "generation",
-        type: "number",
-        label: "Max Output Tokens",
-        min: 1,
-    },
-
-    // ── Access Control ───────────────────────────────────────────────
-    {
-        key: "ACCESS_CODE_LIST",
-        group: "access",
-        type: "string",
-        label: "Access Codes",
-        description:
-            "Comma-separated list. Users must enter one to chat. Empty = open access.",
-        placeholder: "code1,code2",
-    },
-
-    // ── Features ─────────────────────────────────────────────────────
-    {
-        key: "ENABLE_VLM_VALIDATION",
-        group: "features",
-        type: "boolean",
-        label: "VLM Diagram Validation",
-        description:
-            "Visually validate generated diagrams with a vision model.",
-    },
-    {
-        key: "VALIDATION_MODEL",
-        group: "features",
-        type: "string",
-        label: "Validation Model",
-        description: "Falls back to the default AI model when empty.",
-    },
-    {
-        key: "VALIDATION_TIMEOUT",
-        group: "features",
-        type: "number",
-        label: "Validation Timeout (ms)",
-        min: 1000,
-    },
-    {
-        key: "ENABLE_HISTORY_XML_REPLACE",
-        group: "features",
-        type: "boolean",
-        label: "History XML Compression",
-        description: "Replace old diagram XML in history with placeholders.",
-    },
-    {
-        key: "ALLOW_PRIVATE_URLS",
-        group: "features",
-        type: "boolean",
-        label: "Allow Private URLs",
-        description:
-            "Turn off to block requests to private IPs and internal hostnames (SSRF protection).",
-        // Unset means allowed at runtime (ssrf-protection: !== "false")
-        default: "true",
-    },
-
-    // ── Observability ────────────────────────────────────────────────
-    {
-        key: "LANGFUSE_PUBLIC_KEY",
-        group: "observability",
-        type: "string",
-        label: "Langfuse Public Key",
-        placeholder: "pk-lf-…",
-        restartRequired: true,
-    },
-    {
-        key: "LANGFUSE_SECRET_KEY",
-        group: "observability",
-        type: "secret",
-        label: "Langfuse Secret Key",
-        restartRequired: true,
-    },
-    {
-        key: "LANGFUSE_BASEURL",
-        group: "observability",
-        type: "string",
-        label: "Langfuse Base URL",
-        placeholder: "https://cloud.langfuse.com",
-        restartRequired: true,
-    },
-
-    // ── Quota ────────────────────────────────────────────────────────
-    {
-        key: "DAILY_REQUEST_LIMIT",
-        group: "quota",
-        type: "number",
-        label: "Daily Request Limit",
-        description: "Per IP per day.",
-        min: 1,
-    },
-    {
-        key: "DAILY_TOKEN_LIMIT",
-        group: "quota",
-        type: "number",
-        label: "Daily Token Limit",
-        description: "Per IP per day.",
-        min: 1,
-    },
-    {
-        key: "TPM_LIMIT",
-        group: "quota",
-        type: "number",
-        label: "Tokens Per Minute",
-        min: 1,
-    },
-    {
-        key: "DYNAMODB_QUOTA_TABLE",
-        group: "quota",
-        type: "string",
-        label: "DynamoDB Table",
-        description: "Quota enforcement is disabled when empty.",
-        restartRequired: true,
-    },
-    {
-        key: "DYNAMODB_REGION",
-        group: "quota",
-        type: "string",
-        label: "DynamoDB Region",
-        placeholder: "ap-northeast-1",
-        restartRequired: true,
-    },
-    {
-        key: "QUOTA_TIMEZONE",
-        group: "quota",
-        type: "string",
-        label: "Quota Timezone",
-        description: "Timezone for the daily reset boundary.",
-        placeholder: "UTC",
-        restartRequired: true,
-    },
-]
-
-export const SETTINGS_BY_KEY: Map<string, SettingDef> = new Map(
-    SETTINGS_REGISTRY.map((def) => [def.key, def]),
-)
-
-export const SETTINGS_BY_GROUP: Map<string, SettingDef[]> = new Map(
-    SETTING_GROUPS.map((g) => [
-        g.id,
-        SETTINGS_REGISTRY.filter((d) => d.group === g.id),
-    ]),
-)
@@ -1,134 +0,0 @@
-import fs from "fs"
-import path from "path"
-
-// File-based admin settings, overlaid onto process.env (dotenv-style).
-// Precedence: settings file > env var > built-in default.
-// Keys are exactly the env var names.
-
-interface SettingsFile {
-    version: 1
-    values: Record<string, string>
-}
-
-// Original env values snapshotted before the first overlay, so removing a
-// key from the settings file restores the env default. null = was unset.
-const originalEnv: Record<string, string | null> = {}
-// Keys currently overlaid, so we can restore ones removed from the file.
-let overlaidKeys = new Set<string>()
-
-let cachedSettings: Record<string, string> | null = null
-
-export function getSettingsPath(): string {
-    const custom = process.env.SETTINGS_FILE
-    if (custom && custom.trim().length > 0) return custom
-    return path.join(process.cwd(), "data", "settings.json")
-}
-
-export function loadSettings(): Record<string, string> {
-    if (cachedSettings) return cachedSettings
-    try {
-        const raw = fs.readFileSync(getSettingsPath(), "utf8")
-        const parsed = JSON.parse(raw) as SettingsFile
-        // Keep only string values — a hand-edited or corrupted file could
-        // hold null/arrays/numbers that would otherwise be overlaid onto
-        // process.env and coerce to junk like "[object Object]".
-        const values: Record<string, string> = {}
-        const rawValues =
-            parsed &&
-            typeof parsed.values === "object" &&
-            parsed.values &&
-            !Array.isArray(parsed.values)
-                ? parsed.values
-                : {}
-        for (const [key, value] of Object.entries(rawValues)) {
-            if (typeof value === "string") values[key] = value
-        }
-        cachedSettings = values
-    } catch (err: any) {
-        if (err?.code !== "ENOENT") {
-            console.error("[admin-settings] Failed to read settings file:", err)
-        }
-        cachedSettings = {}
-    }
-    return cachedSettings
-}
-
-export function applyToEnv(): void {
-    const values = loadSettings()
-
-    // Restore env for keys that were overlaid before but are now gone
-    for (const key of overlaidKeys) {
-        if (!(key in values)) {
-            const original = originalEnv[key]
-            if (original === null) delete process.env[key]
-            else process.env[key] = original
-        }
-    }
-
-    for (const [key, value] of Object.entries(values)) {
-        if (!(key in originalEnv)) {
-            originalEnv[key] = process.env[key] ?? null
-        }
-        process.env[key] = value
-    }
-
-    overlaidKeys = new Set(Object.keys(values))
-}
-
-// The effective env value if the file entry were removed (for fallback display)
-export function getEnvFallback(key: string): string | null {
-    if (overlaidKeys.has(key)) return originalEnv[key] ?? null
-    return process.env[key] ?? null
-}
-
-// Whether a key's current value comes from the file, the environment, or is unset
-export function getValueSource(key: string): "file" | "env" | "default" {
-    if (key in loadSettings()) return "file"
-    return getEnvFallback(key) !== null ? "env" : "default"
-}
-
-export function saveSettings(updates: Record<string, string | null>): void {
-    const current = { ...loadSettings() }
-    for (const [key, value] of Object.entries(updates)) {
-        if (value === null) delete current[key]
-        else current[key] = value
-    }
-
-    const filePath = getSettingsPath()
-    fs.mkdirSync(path.dirname(filePath), { recursive: true })
-    const tmpPath = `${filePath}.tmp`
-    const data: SettingsFile = { version: 1, values: current }
-    fs.writeFileSync(tmpPath, JSON.stringify(data, null, 2), { mode: 0o600 })
-    fs.renameSync(tmpPath, filePath)
-
-    cachedSettings = current
-    applyToEnv()
-}
-
-let writableCache: boolean | null = null
-
-export function isSettingsWritable(): boolean {
-    if (writableCache !== null) return writableCache
-    try {
-        const dir = path.dirname(getSettingsPath())
-        fs.mkdirSync(dir, { recursive: true })
-        fs.accessSync(dir, fs.constants.W_OK)
-        writableCache = true
-    } catch {
-        writableCache = false
-    }
-    return writableCache
-}
-
-// Test-only: reset module state
-export function _resetForTests(): void {
-    cachedSettings = null
-    writableCache = null
-    for (const key of overlaidKeys) {
-        const original = originalEnv[key]
-        if (original === null) delete process.env[key]
-        else if (original !== undefined) process.env[key] = original
-    }
-    overlaidKeys = new Set()
-    for (const key of Object.keys(originalEnv)) delete originalEnv[key]
-}
@@ -4,73 +4,19 @@ import { azure, createAzure } from "@ai-sdk/azure"
 import { createDeepSeek, deepseek } from "@ai-sdk/deepseek"
 import { createGateway, gateway } from "@ai-sdk/gateway"
 import { createGoogleGenerativeAI, google } from "@ai-sdk/google"
-import { createVertex } from "@ai-sdk/google-vertex"
 import { createOpenAI, openai } from "@ai-sdk/openai"
-import { aihubmix, createAihubmix } from "@aihubmix/ai-sdk-provider"
 import { fromNodeProviderChain } from "@aws-sdk/credential-providers"
 import { createOpenRouter } from "@openrouter/ai-sdk-provider"
 import { createOllama, ollama } from "ollama-ai-provider-v2"
-import { PROVIDER_INFO, type ProviderName } from "@/lib/types/model-config"
+import type { ProviderName } from "@/lib/types/model-config"

 export type { ProviderName }

-export const AIHUBMIX_APP_CODE = "MSBS9675"
-
 interface ModelConfig {
    model: any
    providerOptions?: any
    headers?: Record<string, string>
    modelId: string
-    provider: ProviderName
-}
-
-// Providers that only support a single system message
-export const SINGLE_SYSTEM_PROVIDERS = new Set<ProviderName>([
-    "minimax",
-    "glm",
-    "qwen",
-    "kimi",
-    "qiniu",
-    "novita",
-    "mimo",
-])
-
-/**
- * Normalize MiniMax base URL for AI SDK compatibility.
- * MiniMax supports Anthropic-compatible and OpenAI-compatible endpoints.
- */
-export function normalizeMiniMaxBaseURL(rawUrl: string): {
-    baseURL: string
-    isAnthropicCompatible: boolean
-} {
-    const isAnthropicCompatible = rawUrl.includes("/anthropic")
-    let baseURL = rawUrl.replace(/\/$/, "")
-    if (isAnthropicCompatible) {
-        if (!baseURL.endsWith("/anthropic/v1")) {
-            if (baseURL.endsWith("/anthropic")) {
-                baseURL = `${baseURL}/v1`
-            } else {
-                baseURL = `${baseURL}/anthropic/v1`
-            }
-        }
-    } else {
-        if (!baseURL.endsWith("/v1")) {
-            baseURL = `${baseURL}/v1`
-        }
-    }
-    return { baseURL, isAnthropicCompatible }
-}
-
-export function isAihubmixStandardBaseURL(
-    rawUrl: string | null | undefined,
-): boolean {
-    if (!rawUrl) return true
-
-    const baseURL = rawUrl.replace(/\/+$/, "")
-    return (
-        baseURL === "https://aihubmix.com" ||
-        baseURL === "https://aihubmix.com/v1"
-    )
 }

 export interface ClientOverrides {
@@ -83,42 +29,25 @@ export interface ClientOverrides {
    awsSecretAccessKey?: string | null
    awsRegion?: string | null
    awsSessionToken?: string | null
-    // Vertex AI config
-    vertexApiKey?: string | null // Express Mode API key
    // Custom headers (e.g., for EdgeOne cookie auth)
    headers?: Record<string, string>
-    // Custom env var name(s) for server models
-    // Can be a single string or array of strings for load balancing
-    apiKeyEnv?: string | string[]
-    baseUrlEnv?: string
 }

-// Providers that can be selected from client settings
+// Providers that can be used with client-provided API keys
 const ALLOWED_CLIENT_PROVIDERS: ProviderName[] = [
    "openai",
    "anthropic",
    "google",
-    "vertexai",
    "azure",
    "bedrock",
    "openrouter",
-    "aihubmix",
    "deepseek",
    "siliconflow",
    "sglang",
    "gateway",
    "edgeone",
-    "ollama",
    "doubao",
    "modelscope",
-    "glm",
-    "qwen",
-    "qiniu",
-    "kimi",
-    "minimax",
-    "novita",
-    "mimo",
-    "atlascloud",
 ]

 // Bedrock provider options for Anthropic beta features
@@ -133,87 +62,6 @@ const ANTHROPIC_BETA_HEADERS = {
    "anthropic-beta": "fine-grained-tool-streaming-2025-05-14",
 }

-/**
- * Resolve baseURL based on whether user is providing their own API key.
- * When user provides their own API key, we should NOT fall back to server's
- * baseURL environment variable - user credentials should only be sent to
- * user-specified endpoints or official provider endpoints.
- *
- * @param userApiKey - User-provided API key (if any)
- * @param userBaseUrl - User-provided base URL (if any)
- * @param serverBaseUrl - Server's base URL from environment variable
- * @param defaultBaseUrl - Provider's official/default base URL (optional)
- * @returns The resolved base URL to use
- */
-export function resolveBaseURL(
-    userApiKey: string | null | undefined,
-    userBaseUrl: string | null | undefined,
-    serverBaseUrl: string | undefined,
-    defaultBaseUrl?: string,
-): string | undefined {
-    if (userApiKey) {
-        // User provides their own API key - only use user's baseUrl or default
-        return userBaseUrl || defaultBaseUrl || undefined
-    }
-    // No user API key - fall back to server config
-    return userBaseUrl || serverBaseUrl || defaultBaseUrl || undefined
-}
-
-/**
- * Resolve API key from custom env var name or default env var.
- * Supports multiple API keys per provider via ai-models.json apiKeyEnv config.
- * When multiple keys are configured, randomly selects one for load balancing.
- *
- * Priority:
- * 1. User-provided API key (overrides.apiKey)
- * 2. Custom env var(s) from ai-models.json (overrides.apiKeyEnv)
- *    - If array, randomly picks one with a valid value
- * 3. Default provider env var (defaultEnvVar)
- */
-function resolveApiKey(
-    overrides: ClientOverrides | undefined,
-    defaultEnvVar: string,
-): string | undefined {
-    if (overrides?.apiKey) return overrides.apiKey
-
-    if (overrides?.apiKeyEnv) {
-        // Handle array of env var names - randomly select one
-        if (Array.isArray(overrides.apiKeyEnv)) {
-            // Filter to only env vars that have values
-            const validEnvVars = overrides.apiKeyEnv.filter(
-                (envVar) => process.env[envVar],
-            )
-            if (validEnvVars.length > 0) {
-                // Randomly select one
-                const selectedEnvVar =
-                    validEnvVars[
-                        Math.floor(Math.random() * validEnvVars.length)
-                    ]
-                console.log(
-                    `[API Key Routing] Selected ${selectedEnvVar} from ${validEnvVars.length} available keys`,
-                )
-                return process.env[selectedEnvVar]
-            }
-        } else {
-            return process.env[overrides.apiKeyEnv]
-        }
-    }
-
-    return process.env[defaultEnvVar]
-}
-
-/**
- * Resolve base URL from custom env var name or default env var.
- * Supports multiple base URLs per provider via ai-models.json baseUrlEnv config.
- */
-function resolveBaseUrlEnv(
-    overrides: ClientOverrides | undefined,
-    defaultEnvVar: string,
-): string | undefined {
-    if (overrides?.baseUrlEnv) return process.env[overrides.baseUrlEnv]
-    return process.env[defaultEnvVar]
-}
-
 /**
 * Safely parse integer from environment variable with validation
 */
@@ -248,8 +96,6 @@ function parseIntSafe(
 * - ANTHROPIC_THINKING_TYPE: Anthropic thinking type (enabled)
 * - GOOGLE_THINKING_BUDGET: Google Gemini 2.5 thinking budget in tokens (1024-100000)
 * - GOOGLE_THINKING_LEVEL: Google Gemini 3 thinking level (low/high)
- * - GOOGLE_VERTEX_THINKING_BUDGET: Vertex AI Gemini 2.5 thinking budget in tokens (1024-100000)
- * - GOOGLE_VERTEX_THINKING_LEVEL: Vertex AI Gemini 3 thinking level (low/high)
 * - AZURE_REASONING_EFFORT: Azure/OpenAI reasoning effort (low/medium/high)
 * - AZURE_REASONING_SUMMARY: Azure reasoning summary (none/brief/detailed)
 * - BEDROCK_REASONING_BUDGET_TOKENS: Bedrock Claude reasoning budget in tokens (1024-64000)
@@ -414,46 +260,7 @@ function buildProviderOptions(
            }
            break
        }
-        case "vertexai": {
-            const thinkingBudget = parseIntSafe(
-                process.env.GOOGLE_VERTEX_THINKING_BUDGET,
-                "GOOGLE_VERTEX_THINKING_BUDGET",
-                1024,
-                100000,
-            )
-            const thinkingLevel = process.env.GOOGLE_VERTEX_THINKING_LEVEL

-            if (
-                modelId &&
-                (modelId.includes("gemini-2") ||
-                    modelId.includes("gemini-3") ||
-                    modelId.includes("gemini2") ||
-                    modelId.includes("gemini3"))
-            ) {
-                const thinkingConfig: Record<string, any> = {
-                    includeThoughts: true,
-                }
-
-                const isGemini3 =
-                    modelId?.includes("gemini-3") ||
-                    modelId?.includes("gemini3")
-                const isGemini25 =
-                    modelId?.includes("2.5") || modelId?.includes("2-5")
-
-                if (isGemini3 && thinkingLevel) {
-                    // Vertex AI provider in AI SDK supports more granular levels (minimal/low/medium/high)
-                    thinkingConfig.thinkingLevel = thinkingLevel as
-                        | "minimal"
-                        | "low"
-                        | "medium"
-                        | "high"
-                } else if (isGemini25 && thinkingBudget) {
-                    thinkingConfig.thinkingBudget = thinkingBudget
-                }
-                options.google = { thinkingConfig }
-            }
-            break
-        }
        case "azure": {
            const reasoningEffort = process.env.AZURE_REASONING_EFFORT
            const reasoningSummary = process.env.AZURE_REASONING_SUMMARY
@@ -532,20 +339,11 @@ function buildProviderOptions(

        case "deepseek":
        case "openrouter":
-        case "aihubmix":
        case "siliconflow":
        case "sglang":
        case "gateway":
        case "modelscope":
-        case "doubao":
-        case "minimax":
-        case "glm":
-        case "qwen":
-        case "kimi":
-        case "qiniu":
-        case "novita":
-        case "atlascloud":
-        case "mimo": {
+        case "doubao": {
            // These providers don't have reasoning configs in AI SDK yet
            // Gateway passes through to underlying providers which handle their own configs
            break
@@ -559,16 +357,14 @@ function buildProviderOptions(
 }

 // Map of provider to required environment variable
-export const PROVIDER_ENV_VARS: Record<ProviderName, string | null> = {
+const PROVIDER_ENV_VARS: Record<ProviderName, string | null> = {
    bedrock: null, // AWS SDK auto-uses IAM role on AWS, or env vars locally
    openai: "OPENAI_API_KEY",
    anthropic: "ANTHROPIC_API_KEY",
    google: "GOOGLE_GENERATIVE_AI_API_KEY",
-    vertexai: "GOOGLE_VERTEX_API_KEY",
    azure: "AZURE_API_KEY",
    ollama: null, // No credentials needed for local Ollama
    openrouter: "OPENROUTER_API_KEY",
-    aihubmix: "AIHUBMIX_API_KEY",
    deepseek: "DEEPSEEK_API_KEY",
    siliconflow: "SILICONFLOW_API_KEY",
    sglang: "SGLANG_API_KEY",
@@ -576,14 +372,6 @@ export const PROVIDER_ENV_VARS: Record<ProviderName, string | null> = {
    edgeone: null, // No credentials needed - uses EdgeOne Edge AI
    doubao: "DOUBAO_API_KEY",
    modelscope: "MODELSCOPE_API_KEY",
-    glm: "GLM_API_KEY",
-    qwen: "QWEN_API_KEY",
-    qiniu: "QINIU_API_KEY",
-    kimi: "KIMI_API_KEY",
-    minimax: "MINIMAX_API_KEY",
-    novita: "NOVITA_API_KEY",
-    mimo: "MIMO_API_KEY",
-    atlascloud: "ATLASCLOUD_API_KEY",
 }

 /**
@@ -598,15 +386,7 @@ function detectProvider(): ProviderName | null {
            // Skip ollama - it doesn't require credentials
            continue
        }
-        // Anthropic accepts ANTHROPIC_AUTH_TOKEN (Bearer auth) as alternative to ANTHROPIC_API_KEY
-        const hasCredential =
-            provider === "anthropic"
-                ? !!(
-                      process.env.ANTHROPIC_API_KEY ||
-                      process.env.ANTHROPIC_AUTH_TOKEN
-                  )
-                : !!process.env[envVar]
-        if (hasCredential) {
+        if (process.env[envVar]) {
            // Azure requires additional config (baseURL or resourceName)
            if (provider === "azure") {
                const hasBaseUrl = !!process.env.AZURE_BASE_URL
@@ -629,45 +409,14 @@ function detectProvider(): ProviderName | null {

 /**
 * Validate that required API keys are present for the selected provider
- * @param provider - The provider to validate
- * @param customApiKeyEnv - Optional custom env var name(s) (from ai-models.json apiKeyEnv)
 */
-function validateProviderCredentials(
-    provider: ProviderName,
-    customApiKeyEnv?: string | string[],
-): void {
-    // Handle array of env var names - at least one must be set
-    if (Array.isArray(customApiKeyEnv)) {
-        const hasAnyKey = customApiKeyEnv.some((envVar) => process.env[envVar])
-        if (!hasAnyKey) {
-            throw new Error(
-                `At least one of [${customApiKeyEnv.join(", ")}] environment variables is required for ${provider} provider. ` +
-                    `Please set at least one in your .env.local file.`,
-            )
-        }
-        return
-    }
-
-    // Anthropic accepts ANTHROPIC_AUTH_TOKEN (Bearer auth) as alternative to ANTHROPIC_API_KEY
-    if (provider === "anthropic" && !customApiKeyEnv) {
-        const hasCredential = !!(
-            process.env.ANTHROPIC_API_KEY || process.env.ANTHROPIC_AUTH_TOKEN
+function validateProviderCredentials(provider: ProviderName): void {
+    const requiredVar = PROVIDER_ENV_VARS[provider]
+    if (requiredVar && !process.env[requiredVar]) {
+        throw new Error(
+            `${requiredVar} environment variable is required for ${provider} provider. ` +
+                `Please set it in your .env.local file.`,
        )
-        if (!hasCredential) {
-            throw new Error(
-                `Either ANTHROPIC_API_KEY or ANTHROPIC_AUTH_TOKEN environment variable is required for anthropic provider. ` +
-                    `Please set one in your .env.local file.`,
-            )
-        }
-    } else {
-        // Use custom env var name if provided, otherwise use default
-        const requiredVar = customApiKeyEnv || PROVIDER_ENV_VARS[provider]
-        if (requiredVar && !process.env[requiredVar]) {
-            throw new Error(
-                `${requiredVar} environment variable is required for ${provider} provider. ` +
-                    `Please set it in your .env.local file.`,
-            )
-        }
    }

    // Azure requires either AZURE_BASE_URL or AZURE_RESOURCE_NAME in addition to API key
@@ -687,7 +436,7 @@ function validateProviderCredentials(
 * Get the AI model based on environment variables
 *
 * Environment variables:
- * - AI_PROVIDER: The provider to use (bedrock, openai, anthropic, google, azure, ollama, openrouter, aihubmix, deepseek, siliconflow, sglang, gateway, modelscope)
+ * - AI_PROVIDER: The provider to use (bedrock, openai, anthropic, google, azure, ollama, openrouter, deepseek, siliconflow, sglang, gateway, modelscope)
 * - AI_MODEL: The model ID/name for the selected provider
 *
 * Provider-specific env vars:
@@ -697,9 +446,8 @@ function validateProviderCredentials(
 * - GOOGLE_GENERATIVE_AI_API_KEY: Google API key
 * - AZURE_RESOURCE_NAME, AZURE_API_KEY: Azure OpenAI credentials
 * - AWS_REGION, AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY: AWS Bedrock credentials
- * - OLLAMA_BASE_URL: Ollama server URL (optional, defaults to https://ollama.com/api)
+ * - OLLAMA_BASE_URL: Ollama server URL (optional, defaults to http://localhost:11434)
 * - OPENROUTER_API_KEY: OpenRouter API key
- * - AIHUBMIX_API_KEY: AIHubMix API key
 * - DEEPSEEK_API_KEY: DeepSeek API key
 * - DEEPSEEK_BASE_URL: DeepSeek endpoint (optional)
 * - SILICONFLOW_API_KEY: SiliconFlow API key
@@ -713,15 +461,11 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
    // SECURITY: Prevent SSRF attacks (GHSA-9qf7-mprq-9qgm)
    // If a custom baseUrl is provided, an API key MUST also be provided.
    // This prevents attackers from redirecting server API keys to malicious endpoints.
-    // Exception: EdgeOne doesn't require API keys.
-    // Ollama is exempt only when no server OLLAMA_API_KEY is configured;
-    // when it IS configured, the outer guard also enforces client apiKey for custom baseUrls.
+    // Exception: EdgeOne provider doesn't require API key (uses Edge AI runtime)
    if (
        overrides?.baseUrl &&
        !overrides?.apiKey &&
-        !(overrides?.provider === "vertexai" && overrides?.vertexApiKey) &&
-        overrides?.provider !== "edgeone" &&
-        !(overrides?.provider === "ollama" && !process.env.OLLAMA_API_KEY)
+        overrides?.provider !== "edgeone"
    ) {
        throw new Error(
            `API key is required when using a custom base URL. ` +
@@ -730,16 +474,10 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
    }

    // Check if client is providing their own provider override
-    const isClientOverride = !!(
-        overrides?.provider &&
-        (overrides?.apiKey ||
-            (overrides?.provider === "vertexai" && overrides?.vertexApiKey))
-    )
+    const isClientOverride = !!(overrides?.provider && overrides?.apiKey)

-    // Use client override if provided, otherwise fall back to env vars.
-    // AI_MODEL may be comma-separated (multi-model fallback); pick the first.
-    const envModel = process.env.AI_MODEL?.split(",")[0]?.trim() || undefined
-    const modelId = overrides?.modelId || envModel
+    // Use client override if provided, otherwise fall back to env vars
+    const modelId = overrides?.modelId || process.env.AI_MODEL

    if (!modelId) {
        if (isClientOverride) {
@@ -789,7 +527,6 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
                        `- GOOGLE_GENERATIVE_AI_API_KEY for Google\n` +
                        `- AWS_ACCESS_KEY_ID for Bedrock\n` +
                        `- OPENROUTER_API_KEY for OpenRouter\n` +
-                        `- AIHUBMIX_API_KEY for AIHubMix\n` +
                        `- AZURE_API_KEY for Azure\n` +
                        `- SILICONFLOW_API_KEY for SiliconFlow\n` +
                        `- SGLANG_API_KEY for SGLang\n` +
@@ -807,7 +544,7 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {

    // Only validate server credentials if client isn't providing their own API key
    if (!isClientOverride) {
-        validateProviderCredentials(provider, overrides?.apiKeyEnv)
+        validateProviderCredentials(provider)
    }

    console.log(`[AI Provider] Initializing ${provider} with model: ${modelId}`)
@@ -857,16 +594,8 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
        }

        case "openai": {
-            const apiKey = resolveApiKey(overrides, "OPENAI_API_KEY")
-            const serverBaseUrl = resolveBaseUrlEnv(
-                overrides,
-                "OPENAI_BASE_URL",
-            )
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                serverBaseUrl,
-            )
+            const apiKey = overrides?.apiKey || process.env.OPENAI_API_KEY
+            const baseURL = overrides?.baseUrl || process.env.OPENAI_BASE_URL
            if (baseURL) {
                // Custom base URL = third-party proxy, use Chat Completions API
                // for compatibility (most proxies don't support /responses endpoint)
@@ -884,27 +613,13 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
        }

        case "anthropic": {
-            const apiKey = resolveApiKey(overrides, "ANTHROPIC_API_KEY")
-            const serverBaseUrl = resolveBaseUrlEnv(
-                overrides,
-                "ANTHROPIC_BASE_URL",
-            )
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                serverBaseUrl,
-                "https://api.anthropic.com/v1",
-            )
-            // Anthropic supports two auth methods (mutually exclusive):
-            // - apiKey: sends as `x-api-key` header
-            // - authToken: sends as `Authorization: Bearer <token>` header
-            // Prefer apiKey if present (including client overrides); fall back
-            // to ANTHROPIC_AUTH_TOKEN env var only when no apiKey is available.
-            const authToken = !apiKey
-                ? process.env.ANTHROPIC_AUTH_TOKEN
-                : undefined
+            const apiKey = overrides?.apiKey || process.env.ANTHROPIC_API_KEY
+            const baseURL =
+                overrides?.baseUrl ||
+                process.env.ANTHROPIC_BASE_URL ||
+                "https://api.anthropic.com/v1"
            const customProvider = createAnthropic({
-                ...(authToken ? { authToken } : { apiKey }),
+                apiKey,
                baseURL,
                headers: ANTHROPIC_BETA_HEADERS,
            })
@@ -915,19 +630,9 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
        }

        case "google": {
-            const apiKey = resolveApiKey(
-                overrides,
-                "GOOGLE_GENERATIVE_AI_API_KEY",
-            )
-            const serverBaseUrl = resolveBaseUrlEnv(
-                overrides,
-                "GOOGLE_BASE_URL",
-            )
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                serverBaseUrl,
-            )
+            const apiKey =
+                overrides?.apiKey || process.env.GOOGLE_GENERATIVE_AI_API_KEY
+            const baseURL = overrides?.baseUrl || process.env.GOOGLE_BASE_URL
            if (baseURL || overrides?.apiKey) {
                const customGoogle = createGoogleGenerativeAI({
                    apiKey,
@@ -939,42 +644,11 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
            }
            break
        }
-        case "vertexai": {
-            // Express Mode: Use API key for authentication
-            const vertexApiKey =
-                overrides?.vertexApiKey || process.env.GOOGLE_VERTEX_API_KEY
-
-            if (!vertexApiKey) {
-                throw new Error(
-                    "Vertex AI requires an API key for Express Mode. " +
-                        "Get one from Google Cloud Console or set GOOGLE_VERTEX_API_KEY environment variable.",
-                )
-            }
-
-            // Support custom base URL from env or client override
-            const baseURL =
-                overrides?.baseUrl || process.env.GOOGLE_VERTEX_BASE_URL
-
-            const vertexProvider = createVertex({
-                apiKey: vertexApiKey,
-                ...(baseURL && { baseURL }),
-            })
-            model = vertexProvider(modelId)
-            break
-        }

        case "azure": {
-            const apiKey = resolveApiKey(overrides, "AZURE_API_KEY")
-            const serverBaseUrl = resolveBaseUrlEnv(overrides, "AZURE_BASE_URL")
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                serverBaseUrl,
-            )
-            // Only use server's resourceName if user is NOT providing their own API key
-            const resourceName = overrides?.apiKey
-                ? undefined
-                : process.env.AZURE_RESOURCE_NAME
+            const apiKey = overrides?.apiKey || process.env.AZURE_API_KEY
+            const baseURL = overrides?.baseUrl || process.env.AZURE_BASE_URL
+            const resourceName = process.env.AZURE_RESOURCE_NAME
            // Azure requires either baseURL or resourceName to construct the endpoint
            // resourceName constructs: https://{resourceName}.openai.azure.com/openai/v1{path}
            if (baseURL || resourceName || overrides?.apiKey) {
@@ -991,39 +665,21 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
            break
        }

-        case "ollama": {
-            const baseURL = overrides?.baseUrl || process.env.OLLAMA_BASE_URL
-            // SECURITY: When client provides a custom base URL, only use
-            // client-provided API key. Never fall back to server OLLAMA_API_KEY
-            // to prevent leaking server credentials to user-controlled endpoints.
-            const apiKey = overrides?.baseUrl
-                ? overrides?.apiKey || undefined
-                : resolveApiKey(overrides, "OLLAMA_API_KEY")
-            if (baseURL || apiKey) {
+        case "ollama":
+            if (process.env.OLLAMA_BASE_URL) {
                const customOllama = createOllama({
-                    ...(baseURL && { baseURL }),
-                    ...(apiKey && {
-                        headers: { Authorization: `Bearer ${apiKey}` },
-                    }),
+                    baseURL: process.env.OLLAMA_BASE_URL,
                })
                model = customOllama(modelId)
            } else {
                model = ollama(modelId)
            }
            break
-        }

        case "openrouter": {
-            const apiKey = resolveApiKey(overrides, "OPENROUTER_API_KEY")
-            const serverBaseUrl = resolveBaseUrlEnv(
-                overrides,
-                "OPENROUTER_BASE_URL",
-            )
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                serverBaseUrl,
-            )
+            const apiKey = overrides?.apiKey || process.env.OPENROUTER_API_KEY
+            const baseURL =
+                overrides?.baseUrl || process.env.OPENROUTER_BASE_URL
            const openrouter = createOpenRouter({
                apiKey,
                ...(baseURL && { baseURL }),
@@ -1032,53 +688,9 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
            break
        }

-        case "aihubmix": {
-            const apiKey = resolveApiKey(overrides, "AIHUBMIX_API_KEY")
-            const serverBaseUrl = resolveBaseUrlEnv(
-                overrides,
-                "AIHUBMIX_BASE_URL",
-            )
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                serverBaseUrl,
-                PROVIDER_INFO.aihubmix.defaultBaseUrl,
-            )
-            const defaultBaseURL = PROVIDER_INFO.aihubmix.defaultBaseUrl
-
-            if (
-                isAihubmixStandardBaseURL(baseURL) ||
-                baseURL === defaultBaseURL
-            ) {
-                const aihubmixProvider =
-                    overrides?.apiKey || apiKey
-                        ? createAihubmix({
-                              apiKey,
-                              appCode: AIHUBMIX_APP_CODE,
-                          })
-                        : aihubmix
-                model = aihubmixProvider(modelId)
-            } else {
-                const aihubmixCompatibleProvider = createOpenAI({
-                    apiKey,
-                    baseURL,
-                })
-                model = aihubmixCompatibleProvider.chat(modelId)
-            }
-            break
-        }
-
        case "deepseek": {
-            const apiKey = resolveApiKey(overrides, "DEEPSEEK_API_KEY")
-            const serverBaseUrl = resolveBaseUrlEnv(
-                overrides,
-                "DEEPSEEK_BASE_URL",
-            )
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                serverBaseUrl,
-            )
+            const apiKey = overrides?.apiKey || process.env.DEEPSEEK_API_KEY
+            const baseURL = overrides?.baseUrl || process.env.DEEPSEEK_BASE_URL
            if (baseURL || overrides?.apiKey) {
                const customDeepSeek = createDeepSeek({
                    apiKey,
@@ -1092,17 +704,11 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
        }

        case "siliconflow": {
-            const apiKey = resolveApiKey(overrides, "SILICONFLOW_API_KEY")
-            const serverBaseUrl = resolveBaseUrlEnv(
-                overrides,
-                "SILICONFLOW_BASE_URL",
-            )
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                serverBaseUrl,
-                "https://api.siliconflow.cn/v1",
-            )
+            const apiKey = overrides?.apiKey || process.env.SILICONFLOW_API_KEY
+            const baseURL =
+                overrides?.baseUrl ||
+                process.env.SILICONFLOW_BASE_URL ||
+                "https://api.siliconflow.cn/v1"
            const siliconflowProvider = createOpenAI({
                apiKey,
                baseURL,
@@ -1112,20 +718,12 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
        }

        case "sglang": {
-            const apiKey = resolveApiKey(overrides, "SGLANG_API_KEY")
-            const serverBaseUrl = resolveBaseUrlEnv(
-                overrides,
-                "SGLANG_BASE_URL",
-            )
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                serverBaseUrl,
-            )
+            const apiKey = overrides?.apiKey || process.env.SGLANG_API_KEY
+            const baseURL = overrides?.baseUrl || process.env.SGLANG_BASE_URL

            const sglangProvider = createOpenAI({
                apiKey,
-                ...(baseURL && { baseURL }),
+                baseURL,
                // Add a custom fetch wrapper to intercept and fix the stream from sglang
                fetch: async (url, options) => {
                    const response = await fetch(url, options)
@@ -1229,16 +827,9 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
            // Vercel AI Gateway - unified access to multiple AI providers
            // Model format: "provider/model" e.g., "openai/gpt-4o", "anthropic/claude-sonnet-4-5"
            // See: https://vercel.com/ai-gateway
-            const apiKey = resolveApiKey(overrides, "AI_GATEWAY_API_KEY")
-            const serverBaseUrl = resolveBaseUrlEnv(
-                overrides,
-                "AI_GATEWAY_BASE_URL",
-            )
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                serverBaseUrl,
-            )
+            const apiKey = overrides?.apiKey || process.env.AI_GATEWAY_API_KEY
+            const baseURL =
+                overrides?.baseUrl || process.env.AI_GATEWAY_BASE_URL
            // Only use custom configuration if explicitly set (local dev or custom Gateway)
            // Otherwise undefined → AI SDK uses Vercel default (https://ai-gateway.vercel.sh/v1/ai) + OIDC
            if (baseURL || overrides?.apiKey) {
@@ -1269,17 +860,11 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
        }

        case "doubao": {
-            const apiKey = resolveApiKey(overrides, "DOUBAO_API_KEY")
-            const serverBaseUrl = resolveBaseUrlEnv(
-                overrides,
-                "DOUBAO_BASE_URL",
-            )
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                serverBaseUrl,
-                "https://ark.cn-beijing.volces.com/api/v3",
-            )
+            const apiKey = overrides?.apiKey || process.env.DOUBAO_API_KEY
+            const baseURL =
+                overrides?.baseUrl ||
+                process.env.DOUBAO_BASE_URL ||
+                "https://ark.cn-beijing.volces.com/api/v3"
            const lowerModelId = modelId.toLowerCase()
            // Use DeepSeek provider for DeepSeek/Kimi models, OpenAI for others (multimodal support)
            if (
@@ -1302,17 +887,11 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
        }

        case "modelscope": {
-            const apiKey = resolveApiKey(overrides, "MODELSCOPE_API_KEY")
-            const serverBaseUrl = resolveBaseUrlEnv(
-                overrides,
-                "MODELSCOPE_BASE_URL",
-            )
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                serverBaseUrl,
-                "https://api-inference.modelscope.cn/v1",
-            )
+            const apiKey = overrides?.apiKey || process.env.MODELSCOPE_API_KEY
+            const baseURL =
+                overrides?.baseUrl ||
+                process.env.MODELSCOPE_BASE_URL ||
+                "https://api-inference.modelscope.cn/v1"
            const modelscopeProvider = createOpenAI({
                apiKey,
                baseURL,
@@ -1321,104 +900,9 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
            break
        }

-        case "minimax": {
-            const apiKey = resolveApiKey(overrides, "MINIMAX_API_KEY")
-            const serverBaseUrl = resolveBaseUrlEnv(
-                overrides,
-                "MINIMAX_BASE_URL",
-            )
-            const rawBaseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                serverBaseUrl,
-                PROVIDER_INFO.minimax.defaultBaseUrl,
-            )
-
-            if (!rawBaseURL) {
-                throw new Error(
-                    "MiniMax base URL could not be resolved. Set MINIMAX_BASE_URL or configure a base URL in settings.",
-                )
-            }
-
-            const { baseURL, isAnthropicCompatible } =
-                normalizeMiniMaxBaseURL(rawBaseURL)
-
-            if (isAnthropicCompatible) {
-                const minimax = createAnthropic({ apiKey, baseURL })
-                model = minimax.chat(modelId)
-            } else {
-                const minimax = createOpenAI({ apiKey, baseURL })
-                model = minimax.chat(modelId)
-            }
-            break
-        }
-
-        case "mimo": {
-            const apiKey = resolveApiKey(overrides, "MIMO_API_KEY")
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                resolveBaseUrlEnv(overrides, "MIMO_BASE_URL"),
-                PROVIDER_INFO.mimo?.defaultBaseUrl,
-            )
-            // Use createDeepSeek to properly handle reasoning_content for MiMo
-            // thinking models (e.g., mimo-v2.5-pro). MiMo's API requires
-            // reasoning_content to be passed back during multi-turn tool calls
-            // (returns 400 otherwise), same convention as DeepSeek and Kimi.
-            const mimoProvider = createDeepSeek({ apiKey, baseURL })
-            model = mimoProvider(modelId)
-            break
-        }
-
-        case "glm":
-        case "qwen":
-        case "qiniu":
-        case "novita":
-        case "atlascloud": {
-            const envVar = PROVIDER_ENV_VARS[provider]
-            if (!envVar) {
-                throw new Error(
-                    `API key environment variable not defined for provider: ${provider}`,
-                )
-            }
-            const apiKey = resolveApiKey(overrides, envVar)
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                resolveBaseUrlEnv(
-                    overrides,
-                    `${provider.toUpperCase()}_BASE_URL`,
-                ),
-                PROVIDER_INFO[provider]?.defaultBaseUrl,
-            )
-            const customProvider = createOpenAI({
-                apiKey,
-                baseURL,
-            })
-            model = customProvider.chat(modelId)
-            break
-        }
-
-        case "kimi": {
-            const apiKey = resolveApiKey(overrides, "KIMI_API_KEY")
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                resolveBaseUrlEnv(overrides, "KIMI_BASE_URL"),
-                PROVIDER_INFO.kimi?.defaultBaseUrl,
-            )
-            // Use createDeepSeek to properly handle reasoning_content for Kimi
-            // thinking models (e.g., kimi-k2.6). Kimi's API uses the same
-            // reasoning_content field as DeepSeek, so this provider correctly
-            // captures and replays reasoning in multi-turn conversations.
-            const customProvider = createDeepSeek({ apiKey, baseURL })
-            model = customProvider(modelId)
-            break
-        }
-
        default:
            throw new Error(
-                `Unknown AI provider: ${provider}. Supported providers: bedrock, openai, anthropic, google, azure, ollama, openrouter, aihubmix, deepseek, siliconflow, sglang, gateway, edgeone, doubao, modelscope, glm, qwen, qiniu, kimi, minimax, novita, mimo, atlascloud`,
+                `Unknown AI provider: ${provider}. Supported providers: bedrock, openai, anthropic, google, azure, ollama, openrouter, deepseek, siliconflow, sglang, gateway, edgeone, doubao, modelscope`,
            )
    }

@@ -1427,7 +911,7 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
        providerOptions = customProviderOptions
    }

-    return { model, providerOptions, headers, modelId, provider }
+    return { model, providerOptions, headers, modelId }
 }

 /**
@@ -1445,25 +929,32 @@ export function supportsPromptCaching(modelId: string): boolean {
 }

 /**
- * Get the AI model for diagram validation.
- * Uses VALIDATION_MODEL env var if set, otherwise falls back to AI_MODEL.
- *
- * Note: we no longer guess whether the model supports image input from its
- * name — that heuristic misfired on newer models (see issue #874). If a
- * configured validation model can't handle images, the API call simply errors
- * and the validate-diagram route falls back to "valid".
+ * Check if a model supports image/vision input.
+ * Some models silently drop image parts without error (AI SDK warning only).
 */
-export function getValidationModel(): ReturnType<typeof getAIModel>["model"] {
-    // AI_MODEL may be comma-separated (multi-model fallback); pick the first.
-    const envFallback = process.env.AI_MODEL?.split(",")[0]?.trim() || undefined
-    const modelId = process.env.VALIDATION_MODEL || envFallback
+export function supportsImageInput(modelId: string): boolean {
+    const lowerModelId = modelId.toLowerCase()

-    if (!modelId) {
-        throw new Error(
-            "No validation model configured. Set VALIDATION_MODEL or AI_MODEL.",
-        )
+    // Helper to check if model has vision capability indicator
+    const hasVisionIndicator =
+        lowerModelId.includes("vision") || lowerModelId.includes("vl")
+
+    // Models that DON'T support image/vision input (unless vision variant)
+    // Kimi K2 models don't support images
+    if (lowerModelId.includes("kimi") && !hasVisionIndicator) {
+        return false
    }

-    const { model } = getAIModel({ modelId })
-    return model
+    // DeepSeek text models (not vision variants)
+    if (lowerModelId.includes("deepseek") && !hasVisionIndicator) {
+        return false
+    }
+
+    // Qwen text models (not vision variants like qwen-vl)
+    if (lowerModelId.includes("qwen") && !hasVisionIndicator) {
+        return false
+    }
+
+    // Default: assume model supports images
+    return true
 }
@@ -1,79 +0,0 @@
-export const AIHUBMIX_MODELS_ENDPOINT = "https://aihubmix.com/api/v1/models"
-
-const NON_CHAT_MODEL_TYPES = new Set([
-    "embedding",
-    "image_generation",
-    "rerank",
-    "transcription",
-    "tts",
-    "video",
-])
-
-type AihubmixModelListPayload = {
-    data?: unknown
-}
-
-type AihubmixModelRecord = {
-    model_id?: unknown
-    types?: unknown
-}
-
-function getModelTypes(types: unknown): Set<string> {
-    if (typeof types !== "string") {
-        return new Set()
-    }
-
-    return new Set(
-        types
-            .split(",")
-            .map((type) => type.trim())
-            .filter(Boolean),
-    )
-}
-
-function isChatModel(record: AihubmixModelRecord): record is {
-    model_id: string
-    types: string
-} {
-    if (typeof record.model_id !== "string" || !record.model_id.trim()) {
-        return false
-    }
-
-    const types = getModelTypes(record.types)
-    if (!types.has("llm")) {
-        return false
-    }
-
-    return !Array.from(NON_CHAT_MODEL_TYPES).some((type) => types.has(type))
-}
-
-export function extractAihubmixModelIds(payload: unknown): string[] {
-    const data = (payload as AihubmixModelListPayload)?.data
-    if (!Array.isArray(data)) {
-        return []
-    }
-
-    const seen = new Set<string>()
-    const modelIds: string[] = []
-
-    for (const item of data) {
-        if (!item || typeof item !== "object") {
-            continue
-        }
-
-        const record = item as AihubmixModelRecord
-        if (!isChatModel(record)) {
-            continue
-        }
-
-        const modelId = record.model_id.trim()
-        if (seen.has(modelId)) {
-            continue
-        }
-
-        seen.add(modelId)
-        modelIds.push(modelId)
-    }
-
-    return modelIds
-}
@@ -1,219 +0,0 @@
-/**
- * The stencil catalog: a name → verbatim draw.io style map.
- *
- * This is the anti-hallucination layer. The model asks for `icon("s3")`; the engine
- * looks the name up here and gets the exact style draw.io ships, including the official
- * category colour, the connection points and `aspect=fixed`. A name that is not in the
- * catalog fails at build time with a suggestion, rather than becoming an empty square in
- * the rendered diagram — which is what happens when a model writes
- * `resIcon=mxgraph.aws4.s3_bucket_thing` by hand and nothing checks it.
- *
- * The styles are verbatim from draw.io's own shape index (via drawio-ai-kit, which
- * generated them from jgraph/drawio-mcp's index, Apache-2.0). Nothing here is
- * hand-assembled, so there is no chance of a plausible-looking but wrong colour.
- */
-
-import stencils from "./data/aws-stencils.json"
-
-const ICONS = stencils.icons as Record<string, string>
-const GROUPS = stencils.groups as Record<string, string>
-
-export interface CatalogEntry {
-    name: string
-    kind: "icon" | "group"
-    style: string
-    /** Official colour from the style, for showing the model what it is getting. */
-    color: string | null
-}
-
-function colorOf(style: string): string | null {
-    return style.match(/(?:^|;)fillColor=([^;]+)/)?.[1] ?? null
-}
-
-/** Exact lookup. Returns null for an unknown name — never a guess. */
-export function lookupStencil(
-    name: string,
-    kind?: "icon" | "group",
-): CatalogEntry | null {
-    if (kind !== "group" && ICONS[name])
-        return {
-            name,
-            kind: "icon",
-            style: ICONS[name],
-            color: colorOf(ICONS[name]),
-        }
-    if (kind !== "icon" && GROUPS[name])
-        return {
-            name,
-            kind: "group",
-            style: GROUPS[name],
-            color: colorOf(GROUPS[name]),
-        }
-    return null
-}
-
-/** The resolver the renderer takes, so the engine itself does not depend on the catalog. */
-export function resolveStyle(
-    name: string,
-    kind: "icon" | "group",
-): string | null {
-    return lookupStencil(name, kind)?.style ?? null
-}
-
-/** Normalise for matching: lowercase, and non-alphanumerics collapsed to single spaces. */
-function norm(s: string): string {
-    return s
-        .toLowerCase()
-        .replace(/[^a-z0-9]+/g, " ")
-        .trim()
-}
-
-/**
- * Shorthand people type, mapped to words that actually appear in a catalog name.
- *
- * The direction matters: the target has to exist in the catalog. AWS's own stencil names
- * are already abbreviated — EKS is `eks`, not `elastic_kubernetes_service`, and nothing
- * in the catalog contains the word "kubernetes" at all — so expanding an abbreviation
- * into its full product name finds nothing. These entries go the other way, from a
- * spoken-out name or a nickname to the token the catalog uses.
- */
-const ALIASES: Record<string, string> = {
-    k8s: "eks",
-    kubernetes: "eks",
-    kube: "eks",
-    alb: "application load balancer",
-    nlb: "network load balancer",
-    elb: "elastic load balancing",
-    asg: "auto scaling",
-    apigw: "api gateway",
-    cf: "cloudfront",
-    cw: "cloudwatch",
-    ddb: "dynamodb",
-    tgw: "transit gateway",
-    igw: "internet gateway",
-    r53: "route 53",
-    iam: "identity and access management",
-    kms: "key management service",
-    postgres: "rds",
-    postgresql: "rds",
-    mysql: "rds",
-    aurora: "aurora",
-    bucket: "s3",
-}
-
-/**
- * Score one entry against the query tokens. Higher is better; 0 means no match.
- *
- * The extra-words penalty is what makes "s3" return `s3` rather than
- * `backup_aws_backup_support_for_amazon_s3` — both contain the token, so without it the
- * winner comes down to iteration order. It counts only the words the query did NOT ask
- * for, so a deliberately multi-word query like "nat gateway" is not punished for being
- * specific.
- */
-function score(name: string, qTokens: string[], qJoined: string): number {
-    const n = norm(name)
-    const words = n.split(" ")
-    let s = 0
-    if (n === qJoined) s += 100
-    if (n.replace(/ /g, "") === qJoined.replace(/ /g, "")) s += 60
-    for (const t of qTokens) {
-        if (words.includes(t)) s += 25
-        else if (n.includes(t)) s += 12
-    }
-    if (s === 0) return 0
-    const extra = words.filter((w) => !qTokens.includes(w)).length
-    return s - Math.min(24, extra * 4)
-}
-
-export interface SearchHit {
-    name: string
-    kind: "icon" | "group"
-    color: string | null
-}
-
-/**
- * Find stencils by keyword.
- *
- * Returns names and colours only, not styles. The model builds with `icon("<name>")` and
- * the engine resolves the style itself, so sending the style — around 600 characters per
- * AWS entry, and 20KB+ for an Azure one with an embedded image — would be pure context
- * burn.
- */
-export function searchStencils(
-    query: string,
-    opts: { limit?: number; kind?: "icon" | "group" } = {},
-): SearchHit[] {
-    const limit = opts.limit ?? 8
-    const tokens = norm(query)
-        .split(" ")
-        .filter(Boolean)
-        .map((t) => ALIASES[t] ?? t)
-        .flatMap((t) => t.split(" "))
-    if (tokens.length === 0) return []
-    const joined = tokens.join(" ")
-
-    const pool: [string, string, "icon" | "group"][] = []
-    if (opts.kind !== "group")
-        for (const [n, st] of Object.entries(ICONS)) pool.push([n, st, "icon"])
-    if (opts.kind !== "icon")
-        for (const [n, st] of Object.entries(GROUPS))
-            pool.push([n, st, "group"])
-
-    return pool
-        .map(([name, style, kind]) => ({
-            name,
-            kind,
-            color: colorOf(style),
-            s: score(name, tokens, joined),
-        }))
-        .filter((r) => r.s > 0)
-        .sort((a, b) => b.s - a.s || a.name.length - b.name.length)
-        .slice(0, limit)
-        .map(({ name, kind, color }) => ({ name, kind, color }))
-}
-
-/**
- * Suggest real names for one that does not exist.
- *
- * Plain search is not quite the right tool here. A model that writes
- * `s3_bucket_storage` most likely meant `s3`, but searching that whole phrase ranks
- * `s3_storage_lens` first — it matches more of the query. So we also search the
- * leading token on its own and put those hits first: an invented name is usually a
- * real service name with extra words stuck on the end.
- */
-function suggestFor(name: string, kind: "icon" | "group"): string[] {
-    const words = norm(name.replace(/_/g, " ")).split(" ").filter(Boolean)
-    const out: string[] = []
-    const add = (hits: SearchHit[]) => {
-        for (const h of hits) if (!out.includes(h.name)) out.push(h.name)
-    }
-    if (words.length > 1) add(searchStencils(words[0], { limit: 2, kind }))
-    add(searchStencils(words.join(" "), { limit: 3, kind }))
-    return out.slice(0, 3)
-}
-
-/**
- * Validate the icon names in a tree before laying it out, so a bad name is reported as
- * a correctable error with suggestions instead of rendering as a blank square — which is
- * what an unchecked invented name becomes in draw.io.
- */
-export function checkNames(
-    names: { id: string; name: string; kind: "icon" | "group" }[],
-): { id: string; name: string; suggestions: string[] }[] {
-    const bad: { id: string; name: string; suggestions: string[] }[] = []
-    for (const n of names) {
-        if (!n.name || lookupStencil(n.name, n.kind)) continue
-        bad.push({
-            id: n.id,
-            name: n.name,
-            suggestions: suggestFor(n.name, n.kind),
-        })
-    }
-    return bad
-}
-
-/** Total catalog size, for the tool description. */
-export const CATALOG_SIZE = {
-    icons: Object.keys(ICONS).length,
-    groups: Object.keys(GROUPS).length,
-}
@@ -1,393 +0,0 @@
-/**
- * Graph → layers. What turns a flat list of nodes and arrows into a diagram.
- *
- * The engine's layout can only arrange what nesting tells it to: a container stacks its
- * children in one direction, so six boxes declared in a row become six boxes in a row. For
- * a flowchart that is the wrong answer, and measurably so — an order-approval flow declared
- * in its natural order comes out as one column, which forces the arrow from the decision to
- * its second branch to jump over the first branch, and the arrow to the merge point to jump
- * back over that. The layout never looked at the arrows.
- *
- * This computes what it should have looked at. Three steps, the standard shape of a layered
- * graph drawing (Sugiyama's algorithm):
- *
- *   1. LAYER — how far along the flow each node sits. Longest path from a source, so an
- *      arrow always points forwards and no arrow skips backwards through a layer.
- *   2. ORDER — who goes left and who goes right within a layer. Chosen to reduce the number
- *      of arrows that cross, which is what makes a flowchart readable.
- *   3. EMIT — one invisible row container per layer, which the existing layout then places.
- *
- * Step 3 is why this file is small: the coordinate work already exists, and it is the same
- * code that lays out an AWS diagram. What was missing was only the decision of what goes in
- * which row.
- */
-
-import type { Operation } from "./operations"
-import type { BoxShape, Role } from "./types"
-
-/** A node in the graph the caller wants drawn. */
-export interface GraphNode {
-    id: string
-    label: string
-    /** Flowchart outline. `decision` for a branch, `terminator` for a start or end point. */
-    shape?: BoxShape
-    /** Catalog stencil name. When set the node renders as an icon rather than a box. */
-    icon?: string
-    /**
-     * Semantic group name, e.g. "remote" or "local". Nodes sharing a group get the same
-     * fill colour from the engine's palette, assigned in order of first appearance — the
-     * caller names the grouping and never touches a colour.
-     */
-    group?: string
-    /** Information role (heading, callout, metric…); the theme decides how it looks. */
-    role?: Role
-}
-
-/** An arrow. Direction matters: it is what determines the layering. */
-export interface GraphEdge {
-    source: string
-    target: string
-    label?: string
-    dashed?: boolean
-    /** Thick coloured arrow for THE key relationship. */
-    bold?: boolean
-    /** Arrowhead tokens, passed through — see LinkSpec. */
-    head?: string
-    tail?: string
-    headFill?: boolean
-    tailFill?: boolean
-}
-
-export interface GraphOptions {
-    /** "col" (default): layers stack downwards. "row": layers run left to right. */
-    flow?: "col" | "row"
-    /** Container to embed the graph in; absent means the page. */
-    parent?: string
-    /**
-     * Namespace for the synthetic layer-container ids. Without one, two graphs on one
-     * page would both emit `__layers`/`__layer0` and the second would be rejected as a
-     * duplicate id.
-     */
-    prefix?: string
-    /** Id for the outer container itself; defaults to `${prefix}__layers`. */
-    rootId?: string
-}
-
-/** Distance between layers. */
-const LAYER_GAP = 48
-/** Distance between nodes within a layer. */
-const NODE_GAP = 60
-/** Prefix for the generated layer container ids. */
-const LAYER_ID = "__layer"
-
-export interface GraphResult {
-    operations: Operation[]
-    /** The nodes of each layer, in the order they were placed. */
-    layers: string[][]
-    /** Edges dropped because an endpoint is not in the node list. */
-    unknownEndpoints: string[]
-    /** Edges that had to be treated as loops rather than as layering constraints. */
-    backEdges: { source: string; target: string }[]
-}
-
-/**
- * Break every cycle, so the graph can be layered at all.
- *
- * A depth-first walk; any arrow pointing at a node still on the current path is a way back
- * to where we came from, and cannot be a "this comes after that" constraint. Those arrows
- * are still DRAWN — a review loop is the point of the diagram — they just do not get a say
- * in which layer anything lands in.
- */
-function breakCycles(
-    nodes: string[],
-    edges: GraphEdge[],
-): { forward: GraphEdge[]; back: GraphEdge[] } {
-    const out = new Map<string, GraphEdge[]>(nodes.map((n) => [n, []]))
-    for (const e of edges) out.get(e.source)?.push(e)
-
-    const forward: GraphEdge[] = []
-    const back: GraphEdge[] = []
-    const onPath = new Set<string>()
-    const done = new Set<string>()
-
-    // An explicit stack, not recursion: a 500-node dependency graph is a plausible input and
-    // a recursive walk over one would overflow.
-    for (const root of nodes) {
-        if (done.has(root)) continue
-        const stack: { id: string; next: number }[] = [{ id: root, next: 0 }]
-        onPath.add(root)
-        while (stack.length > 0) {
-            const top = stack[stack.length - 1]
-            const list = out.get(top.id) ?? []
-            if (top.next >= list.length) {
-                onPath.delete(top.id)
-                done.add(top.id)
-                stack.pop()
-                continue
-            }
-            const e = list[top.next++]
-            if (onPath.has(e.target)) {
-                back.push(e)
-                continue
-            }
-            forward.push(e)
-            if (!done.has(e.target)) {
-                onPath.add(e.target)
-                stack.push({ id: e.target, next: 0 })
-            }
-        }
-    }
-    return { forward, back }
-}
-
-/**
- * Assign each node to a layer: the longest path to it from any node with no predecessor.
- *
- * Longest path rather than shortest, because a node has to come after EVERYTHING that feeds
- * it. Take the shortest and an arrow ends up pointing backwards: with `a→b`, `a→c`, `c→b`,
- * the shortest path puts b in layer 1 alongside c, and then `c→b` points sideways.
- */
-function assignLayers(nodes: string[], forward: GraphEdge[]): string[][] {
-    const layer = new Map<string, number>(nodes.map((n) => [n, 0]))
-    // Relaxation, bounded by the node count: the longest possible chain visits every node
-    // once, so after that many rounds nothing can still be moving.
-    for (let round = 0; round < nodes.length; round++) {
-        let moved = false
-        for (const e of forward) {
-            const want = (layer.get(e.source) ?? 0) + 1
-            if (want > (layer.get(e.target) ?? 0)) {
-                layer.set(e.target, want)
-                moved = true
-            }
-        }
-        if (!moved) break
-    }
-    const depth = Math.max(0, ...layer.values()) + 1
-    const layers: string[][] = Array.from({ length: depth }, () => [])
-    // Declaration order within a layer, so the ordering pass starts somewhere predictable.
-    for (const n of nodes) layers[layer.get(n) ?? 0].push(n)
-    return layers
-}
-
-/**
- * Reorder each layer to reduce the number of arrows that cross.
- *
- * Barycentre sweeping: a node is placed at the average position of the nodes it connects to
- * in the neighbouring layer, and the whole diagram is swept downwards then upwards
- * repeatedly. Each sweep can only be judged against the previous layer's order, so a node
- * pulled into a better place drags its own neighbours in the next sweep.
- *
- * The heuristic, not an exact minimum: finding the true minimum number of crossings is
- * NP-hard even for two layers. In practice this reaches zero crossings on the flowcharts the
- * model actually produces — verified on a 14-node pipeline with two diamonds and a rollback
- * loop, and on a bipartite graph whose declared order forces three crossings.
- */
-function reduceCrossings(layers: string[][], edges: GraphEdge[]): void {
-    if (layers.length < 2) return
-    const PASSES = 8
-    const into = new Map<string, string[]>()
-    const outOf = new Map<string, string[]>()
-    for (const e of edges) {
-        if (e.source === e.target) continue
-        ;(into.get(e.target) ?? into.set(e.target, []).get(e.target))?.push(
-            e.source,
-        )
-        ;(outOf.get(e.source) ?? outOf.set(e.source, []).get(e.source))?.push(
-            e.target,
-        )
-    }
-
-    let best = layers.map((l) => [...l])
-    let bestScore = countCrossings(layers, edges)
-
-    for (let pass = 0; pass < PASSES && bestScore > 0; pass++) {
-        const pos = new Map<string, number>()
-        for (const l of layers)
-            l.forEach((n, i) => {
-                pos.set(n, i)
-            })
-        const down = pass % 2 === 0
-        const order = down
-            ? layers.map((_, i) => i).slice(1)
-            : layers
-                  .map((_, i) => i)
-                  .slice(0, -1)
-                  .reverse()
-
-        for (const i of order) {
-            const neighbours = down ? into : outOf
-            const key = new Map<string, number>()
-            layers[i].forEach((n, idx) => {
-                const nb = (neighbours.get(n) ?? [])
-                    .map((m) => pos.get(m))
-                    .filter((v): v is number => v !== undefined)
-                // A node with no neighbour in that direction keeps its place, rather than
-                // being pushed to one end by a default of zero.
-                key.set(
-                    n,
-                    nb.length ? nb.reduce((a, b) => a + b, 0) / nb.length : idx,
-                )
-            })
-            layers[i] = [...layers[i]].sort(
-                (a, b) => (key.get(a) ?? 0) - (key.get(b) ?? 0),
-            )
-        }
-
-        // Keep the best arrangement seen: sweeping is not monotonic, and a later pass can be
-        // worse than an earlier one.
-        const score = countCrossings(layers, edges)
-        if (score < bestScore) {
-            bestScore = score
-            best = layers.map((l) => [...l])
-        }
-    }
-    for (let i = 0; i < layers.length; i++) layers[i] = best[i]
-}
-
-/**
- * How many pairs of arrows cross between adjacent layers.
- *
- * Two arrows between the same pair of layers cross exactly when their endpoints are in the
- * opposite order on the two sides. That is all this counts — arrows spanning more than one
- * layer are ignored here, because their crossings depend on routing rather than ordering.
- */
-function countCrossings(layers: string[][], edges: GraphEdge[]): number {
-    const layerOf = new Map<string, number>()
-    const posOf = new Map<string, number>()
-    layers.forEach((l, i) => {
-        l.forEach((n, j) => {
-            layerOf.set(n, i)
-            posOf.set(n, j)
-        })
-    })
-    let total = 0
-    for (let i = 0; i + 1 < layers.length; i++) {
-        const span = edges.filter(
-            (e) =>
-                layerOf.get(e.source) === i && layerOf.get(e.target) === i + 1,
-        )
-        for (let a = 0; a < span.length; a++)
-            for (let b = a + 1; b < span.length; b++) {
-                const s1 = posOf.get(span[a].source) ?? 0
-                const t1 = posOf.get(span[a].target) ?? 0
-                const s2 = posOf.get(span[b].source) ?? 0
-                const t2 = posOf.get(span[b].target) ?? 0
-                if ((s1 - s2) * (t1 - t2) < 0) total++
-            }
-    }
-    return total
-}
-
-/**
- * Turn a graph into the operations that draw it.
- *
- * The output is ordinary operations — nothing here is a new kind of thing the rest of the
- * engine has to know about. A layer of one node is emitted directly rather than wrapped,
- * because a single-child row container would just add a level of nesting with nothing to
- * arrange.
- */
-export function graphToOperations(
-    nodes: GraphNode[],
-    edges: GraphEdge[],
-    opts: GraphOptions = {},
-): GraphResult {
-    const flow = opts.flow ?? "col"
-    const ids = nodes.map((n) => n.id)
-    const known = new Set(ids)
-
-    const unknownEndpoints: string[] = []
-    const usable: GraphEdge[] = []
-    for (const e of edges) {
-        if (!known.has(e.source)) unknownEndpoints.push(e.source)
-        if (!known.has(e.target)) unknownEndpoints.push(e.target)
-        if (known.has(e.source) && known.has(e.target)) usable.push(e)
-    }
-
-    // A self-loop tells us nothing about layering and would make the cycle break drop a real
-    // arrow, so it is set aside and drawn as-is.
-    const loops = usable.filter((e) => e.source === e.target)
-    const between = usable.filter((e) => e.source !== e.target)
-
-    const { forward, back } = breakCycles(ids, between)
-    const layers = assignLayers(ids, forward)
-    reduceCrossings(layers, forward)
-
-    // The flow axis is the OUTER container's direction; a layer runs across it.
-    const outerDir = flow
-    const layerDir = flow === "col" ? "row" : "col"
-    const ns = opts.prefix ?? ""
-    const root = opts.rootId ?? `${ns}${LAYER_ID}s`
-
-    const operations: Operation[] = [
-        {
-            op: "add_container",
-            id: root,
-            ...(opts.parent ? { parent: opts.parent } : {}),
-            label: "",
-            dir: outerDir,
-            gap: LAYER_GAP,
-        },
-    ]
-    const byId = new Map(nodes.map((n) => [n.id, n]))
-    const add = (id: string, parent: string): Operation => {
-        const n = byId.get(id) as GraphNode
-        return n.icon
-            ? {
-                  op: "add_icon",
-                  id: n.id,
-                  parent,
-                  name: n.icon,
-                  label: n.label,
-              }
-            : {
-                  op: "add_box",
-                  id: n.id,
-                  parent,
-                  label: n.label,
-                  ...(n.shape && n.shape !== "box" ? { shape: n.shape } : {}),
-                  ...(n.role && n.role !== "body" ? { role: n.role } : {}),
-                  ...(n.group ? { group: n.group } : {}),
-              }
-    }
-
-    layers.forEach((members, i) => {
-        if (members.length === 0) return
-        if (members.length === 1) {
-            operations.push(add(members[0], root))
-            return
-        }
-        const band = `${ns}${LAYER_ID}${i}`
-        operations.push({
-            op: "add_container",
-            id: band,
-            parent: root,
-            label: "",
-            dir: layerDir,
-            gap: NODE_GAP,
-        })
-        for (const m of members) operations.push(add(m, band))
-    })
-
-    for (const e of [...between, ...loops])
-        operations.push({
-            op: "link",
-            source: e.source,
-            target: e.target,
-            ...(e.label ? { label: e.label } : {}),
-            ...(e.dashed ? { dashed: true } : {}),
-            ...(e.bold ? { bold: true } : {}),
-            ...(e.head !== undefined
-                ? { head: e.head, headFill: e.headFill ?? false }
-                : {}),
-            ...(e.tail !== undefined
-                ? { tail: e.tail, tailFill: e.tailFill ?? false }
-                : {}),
-        })
-
-    return {
-        operations,
-        layers: layers.filter((l) => l.length > 0),
-        unknownEndpoints: [...new Set(unknownEndpoints)],
-        backEdges: back.map((e) => ({ source: e.source, target: e.target })),
-    }
-}
@@ -1,146 +0,0 @@
-/**
- * The engine's entry point: one call takes the current canvas XML plus a list of
- * structural operations and returns new canvas XML.
- *
- *   current XML → parse → apply operations → check names → layout → render → new XML
- *
- * The tree is not stored anywhere between calls. It is re-derived from the canvas every
- * time, so a user's manual edits — moving a shape into a different frame, recolouring a
- * box, adding an annotation — are simply part of the input to the next layout. There is
- * no second copy of the state, and therefore nothing to reconcile.
- */
-
-import { checkNames, resolveStyle } from "./catalog"
-import {
-    applyOperations,
-    collectNames,
-    type Operation,
-    outline,
-} from "./operations"
-import { parseDiagram } from "./parse"
-import { renderDiagram } from "./render"
-import { nearestShape, resolveShape } from "./shapes"
-import { type DiagramTree, walkTree } from "./types"
-
-export interface RestructureResult {
-    /** New canvas XML, or null when the request could not be carried out. */
-    xml: string | null
-    /** Compact outline of the resulting structure, for the model to read back. */
-    outline: string
-    /** Operations that could not be applied, and invented stencil names. */
-    errors: string[]
-    /** Non-fatal notes: pages skipped, structure that could not be read cleanly. */
-    warnings: string[]
-}
-
-export interface RestructureOptions {
-    /** Which page of a multi-page document to work on. */
-    pageIndex?: number
-    /** Diagram-wide icon glyph size. */
-    iconSize?: number
-}
-
-/**
- * Apply structural operations to whatever is on the canvas.
- *
- * `currentXml` may be empty — that is how a diagram gets built from scratch.
- *
- * An invented stencil name is a hard error, not a silent fallback: draw.io renders an
- * unknown `resIcon` as a blank square, so a diagram that "worked" would be quietly
- * missing icons. The error carries suggestions from the catalog so the model can fix it
- * in one more turn.
- */
-export function restructureDiagram(
-    currentXml: string,
-    ops: Operation[],
-    opts: RestructureOptions = {},
-): RestructureResult {
-    const warnings: string[] = []
-
-    let tree: DiagramTree
-    if (currentXml.trim()) {
-        const parsed = parseDiagram(currentXml, opts.pageIndex ?? 0)
-        tree = parsed.tree
-        warnings.push(...parsed.warnings)
-    } else {
-        tree = { roots: [], links: [], foreign: [] }
-    }
-
-    const applied = applyOperations(tree, ops)
-    const errors = [...applied.errors]
-    warnings.push(...applied.warnings)
-
-    // Catch invented names before rendering, so the model gets a correctable error
-    // instead of a diagram with blank squares in it.
-    for (const bad of checkNames(collectNames(applied.tree))) {
-        const hint = bad.suggestions.length
-            ? ` Did you mean: ${bad.suggestions.join(", ")}?`
-            : ""
-        errors.push(
-            `"${bad.name}" (node ${bad.id}) is not in the stencil catalog.${hint}`,
-        )
-    }
-
-    // Shape tokens: an injection-capable token is an error; an unknown-but-safe one
-    // passes through (draw.io degrades it to a rectangle) but gets a warning, so a typo
-    // is a one-turn fix instead of a silently rectangular "cyclinder" forever.
-    for (const n of walkTree(applied.tree)) {
-        if (n.kind !== "box" || !n.shape || n.shape === "box") continue
-        const resolved = resolveShape(n.shape)
-        if (!resolved) {
-            errors.push(
-                `shape "${n.shape}" (node ${n.id}) contains characters that are not allowed in a shape token.`,
-            )
-        } else if (resolved.passthrough) {
-            const near = nearestShape(n.shape)
-            warnings.push(
-                `shape "${n.shape}" (node ${n.id}) is not in the engine's catalog — passed through to draw.io, which renders unknown shapes as rectangles.${near ? ` Did you mean "${near}"?` : ""}`,
-            )
-        }
-    }
-
-    if (errors.length > 0)
-        return { xml: null, outline: outline(applied.tree), errors, warnings }
-
-    const rendered = renderDiagram(applied.tree, {
-        resolveStyle,
-        iconSize: opts.iconSize,
-    })
-    if (rendered.danglingLinks.length)
-        warnings.push(
-            `Dropped edge(s) pointing at missing nodes: ${rendered.danglingLinks.join(", ")}.`,
-        )
-
-    return {
-        xml: rendered.xml,
-        outline: outline(applied.tree),
-        errors: [],
-        warnings,
-    }
-}
-
-/** Read the current canvas structure without changing it. */
-export function describeDiagram(
-    currentXml: string,
-    pageIndex = 0,
-): { outline: string; warnings: string[]; needsAdoption: boolean } {
-    if (!currentXml.trim())
-        return { outline: "(empty canvas)", warnings: [], needsAdoption: false }
-    const { tree, warnings, needsAdoption } = parseDiagram(
-        currentXml,
-        pageIndex,
-    )
-    return { outline: outline(tree), warnings, needsAdoption }
-}
-
-export { CATALOG_SIZE, lookupStencil, searchStencils } from "./catalog"
-export {
-    type GraphEdge,
-    type GraphNode,
-    type GraphOptions,
-    graphToOperations,
-} from "./graph"
-export { type Operation, OperationSchema } from "./operations"
-export { parseDiagram } from "./parse"
-export { renderDiagram } from "./render"
-export type { DiagramNode, DiagramTree } from "./types"
@@ -1,585 +0,0 @@
-/**
- * Style markers — how layout structure survives a round-trip through draw.io.
- *
- * The layout engine's tree carries information plain draw.io XML does not: which
- * direction a container stacks its children, the gap between them, and whether the
- * user has pinned a node's position. We encode that as extra `key=value` tokens in
- * the cell's style string.
- *
- * Two behaviours this relies on, both verified in a real browser (Playwright drag
- * against the embedded editor, reading the editor's own autosave payload):
- *
- *   1. draw.io PRESERVES style keys it does not understand. After a user drags a
- *      shape and the editor saves, `dai_kind=group;dai_dir=col;dai_gap=22;` came
- *      back byte-identical.
- *   2. On a DUPLICATE key, the LAST value wins. A style ending in
- *      `container=0;pointerEvents=0;container=1;` behaved as a container: a shape
- *      dragged into it was reparented. So we can append a normalising token without
- *      first parsing out the old one.
- *
- * (2) matters because the AWS catalog is inconsistent: group_region, group_vpc,
- * group_subnet, group_availability_zone, group_aws_cloud and group_on_premise ship
- * WITHOUT container=1, while group_account, group_aws_cloud_alt, group_vpc2,
- * group_security_group and group_corporate_data_center ship WITH it. Appending
- * unconditionally normalises all of them.
- */
-
-/** Marker keys. Namespaced with `dai_` so they cannot collide with mxGraph keys. */
-export const MARKER = {
-    /** Node kind, so the parser does not have to re-guess it from the shape. */
-    kind: "dai_kind",
-    /** Child stacking direction of a container: "row" | "col" | "grid". */
-    dir: "dai_dir",
-    /** Gap between children, in px. */
-    gap: "dai_gap",
-    /** Column count, for grid containers. */
-    cols: "dai_cols",
-    /** Set by the user to freeze a node's position across re-layouts. */
-    pin: "dai_pin",
-    /**
-     * A catalog icon's name. Needed because an Azure or GCP icon's style is an embedded
-     * base64 image with no name anywhere in it, so the style alone cannot identify it.
-     */
-    name: "dai_name",
-    /**
-     * Which (lane, column) cell of a swimlane pool a node occupies, as "lane,col".
-     *
-     * Position alone cannot recover this once the user drags a node: the cell it lands in
-     * is a guess, whereas the marker records which lane the model assigned it to. It is
-     * also the only way an empty cell stays empty — geometry can only tell us where things
-     * ARE, never that a role deliberately does nothing at a given step.
-     */
-    cell: "dai_cell",
-    /** A pool's lane names, tab-separated (a tab cannot appear in a draw.io style value). */
-    lanes: "dai_lanes",
-    /** A pool's milestone labels, tab-separated. */
-    phases: "dai_phases",
-    /** A pool's orientation: "h" or "v". */
-    orient: "dai_orient",
-    /** Vertical distance between consecutive messages in a sequence diagram. */
-    step: "dai_step",
-    /** How a radial container fans its branches out: "radial" or "down". */
-    spread: "dai_spread",
-    /** The node's information role (banner, heading, callout…), for the round trip. */
-    role: "dai_role",
-    /** The node's semantic zone, whose hue ramp colours it. */
-    group: "dai_group",
-    /**
-     * The declared shape token, verbatim. Appearance-based reverse mapping is ambiguous
-     * (aliases, rotated variants, styles with no unique shape= token), so the round trip
-     * carries the declaration itself.
-     */
-    shape: "dai_shape",
-    /**
-     * Marks a node's size as engine-computed rather than user-fixed. Without it, the
-     * w/h read back from the canvas would freeze the first layout's measurement: change
-     * the label and the box would keep the old size instead of re-measuring.
-     */
-    auto: "dai_auto",
-    /** Share of the parent's leftover flow-axis space — flex-grow. */
-    grow: "dai_grow",
-    /** Cross-axis position within the parent: "start" | "center" | "end". */
-    align: "dai_align",
-    /** How a container spreads children along its own axis — justify-content. */
-    justify: "dai_justify",
-    /** A container's cross-axis default for children that declare no align of their own. */
-    alignItems: "dai_aitems",
-    /** Opted out of the content-width floor when weights divide a row — CSS's min-width:0. */
-    minw0: "dai_minw0",
-    /**
-     * Declared width cap, px.
-     *
-     * Has to be a marker rather than inferred from the drawn width: the two are only equal
-     * when the cap actually bit. A box capped at 400 that happens to be 260 wide would come
-     * back with a 260 cap, and the next re-layout could never let it grow again.
-     */
-    maxw: "dai_maxw",
-    /** A container's interior padding, px. */
-    pad: "dai_pad",
-    /**
-     * The page's declared width:height, on the default layer's cell.
-     *
-     * Page-level rather than per-node, so it goes on layer "1" — the one cell every
-     * diagram has and draw.io never discards. It cannot be inferred from pageWidth and
-     * pageHeight: those are what the last layout produced, so reading them back would
-     * turn whatever shape a diagram happened to come out as into a standing request to
-     * keep it.
-     */
-    aspect: "dai_aspect",
-    /**
-     * Marks a cell as chrome the engine draws and owns: a pool's lane bands, its label
-     * columns, its milestone strip. The parser must not read these back as nodes — they are
-     * re-derived from the pool's own parameters on every layout — and the edge router must
-     * not treat them as obstacles, since a sequence flow crossing lanes is the norm.
-     */
-    lane: "dai_lane",
-} as const
-
-export type NodeKind =
-    | "group"
-    | "grid"
-    | "pool"
-    | "sequence"
-    | "radial"
-    | "icon"
-    | "box"
-    | "title"
-export type Direction = "row" | "col" | "grid"
-
-/**
- * Tokens that make a shape behave as a container in draw.io: it accepts a shape
- * dragged into it and reparents that shape (setting `parent` and switching the
- * child's geometry to parent-relative).
- *
- * `pointerEvents=0` keeps clicks falling through to the children — without it the
- * frame swallows them and the user cannot select what is inside. `collapsible=0`
- * hides the fold arrow. `recursiveResize=0` stops children from being scaled when
- * the frame is resized, which would fight the layout engine.
- */
-const CONTAINER_TOKENS =
-    "container=1;pointerEvents=0;collapsible=0;recursiveResize=0;"
-
-/**
- * A container that groups children for layout but should not be visible.
- *
- * The reference project solves this with a "phantom": a wrapper that participates in
- * layout and then emits NO cell, reparenting its children onto the nearest visible
- * ancestor. That makes the round-trip lossy by construction — the wrapper's direction
- * and grouping are simply absent from the XML, so re-deriving the tree cannot recover
- * them. Measured on the reference project's own build_vpc.mjs: a phantom erased a
- * container's "col" direction, leaving children in a 2-D arrangement that can only be
- * read back as a grid.
- *
- * So we emit a real cell and make it invisible instead. One extra cell per wrapper,
- * in exchange for structure that survives being read back.
- */
-const INVISIBLE_TOKENS = "fillColor=none;strokeColor=none;"
-
-/** Read a marker's raw value out of a style string. Last occurrence wins, as draw.io does. */
-export function readMarker(style: string, key: string): string | null {
-    // Scan all matches and keep the last, mirroring draw.io's duplicate-key resolution.
-    const re = new RegExp(`(?:^|;)${key}=([^;]*)`, "g")
-    let last: string | null = null
-    let m = re.exec(style)
-    while (m !== null) {
-        last = m[1]
-        m = re.exec(style)
-    }
-    return last
-}
-
-const KINDS: readonly NodeKind[] = [
-    "group",
-    "grid",
-    "pool",
-    "sequence",
-    "radial",
-    "icon",
-    "box",
-    "title",
-]
-
-export function readKind(style: string): NodeKind | null {
-    const v = readMarker(style, MARKER.kind)
-    return KINDS.includes(v as NodeKind) ? (v as NodeKind) : null
-}
-
-/**
- * The (lane, column) cell a node occupies in a swimlane pool, or null.
- *
- * Both must be non-negative integers: a malformed value is safer read as "no cell
- * declared" (which puts the node in lane 0 column 0) than as a negative index, which would
- * place it outside the pool's frame.
- */
-export function readCell(style: string): { lane: number; col: number } | null {
-    const v = readMarker(style, MARKER.cell)
-    if (!v) return null
-    const m = v.match(/^(\d+),(\d+)$/)
-    return m ? { lane: Number(m[1]), col: Number(m[2]) } : null
-}
-
-/**
- * A tab-separated marker list, as written by `joinList`.
- *
- * A tab cannot appear in a draw.io style value — the editor writes styles as a single
- * semicolon-separated line — so it is safe as a separator inside one value, where a comma
- * would collide with the label text it has to carry.
- */
-export function readList(style: string, key: string): string[] | null {
-    const v = readMarker(style, key)
-    if (v === null) return null
-    if (v === "") return []
-    return v.split("\t").map(decodeURIComponent)
-}
-
-/** Encode a list of labels into one marker value. */
-export function joinList(items: string[]): string {
-    // Percent-encoding keeps a label containing ";" or "=" from breaking the style string.
-    return items.map((s) => encodeURIComponent(s)).join("\t")
-}
-
-/** Is this cell pool chrome the engine draws and owns, rather than a node? */
-export function isLaneChrome(style: string): boolean {
-    return readMarker(style, MARKER.lane) !== null
-}
-
-export function readDir(style: string): Direction | null {
-    const v = readMarker(style, MARKER.dir)
-    if (v === "row" || v === "col" || v === "grid") return v
-    return null
-}
-
-/** Read a positive integer marker (gap, cols). Returns null when absent or malformed. */
-export function readIntMarker(style: string, key: string): number | null {
-    const v = readMarker(style, key)
-    if (v === null) return null
-    const n = Number(v)
-    return Number.isFinite(n) && n >= 0 ? Math.round(n) : null
-}
-
-/**
- * Has the user pinned this node? Any value other than "0"/""/"false" counts as
- * pinned, so a user typing `dai_pin=1` (or just `dai_pin=yes`) in draw.io's
- * "Edit Style" dialog gets what they expect.
- */
-export function isPinned(style: string): boolean {
-    const v = readMarker(style, MARKER.pin)
-    if (v === null) return false
-    const s = v.trim().toLowerCase()
-    return s !== "" && s !== "0" && s !== "false"
-}
-
-/**
- * Append `key=value;`, replacing any existing occurrence of the key first.
- *
- * Styles are re-stamped on every render, and a style recovered from the canvas already
- * carries last render's markers — blindly appending grew the string by one duplicate per
- * round-trip, unboundedly. Duplicates resolve last-wins in draw.io so nothing ever LOOKED
- * wrong, which is why it went unnoticed until a byte-identity test caught it.
- *
- * Only `dai_*` keys are cleaned. mxGraph keys are appended verbatim because last-wins is
- * load-bearing there: the container tokens rely on appending `container=1` after a catalog
- * style that may say `container=0`.
- */
-/**
- * Set each `key=value;` token of `tokens` on a style, replacing any value already there.
- *
- * Matching is per token, not on the whole run: a catalog style may already declare
- * `container=1` while saying nothing about `pointerEvents`, and re-adding the whole run
- * because one token was missing is what let these accumulate.
- *
- * Exported because the same defect appeared a second time, on EDGES: an edge's style starts
- * from whatever the canvas held, which already carried the previous pass's `exitX`/`entryX`
- * port keys, and the router appended a fresh set on top of them every render — 76 characters
- * per round-trip, without bound. Any code that re-stamps a computed mxGraph key onto a style
- * recovered from the canvas needs this rather than `+=`.
- */
-export function appendOnce(style: string, tokens: string): string {
-    let s = style
-    for (const tok of tokens.split(";")) {
-        if (!tok) continue
-        const key = tok.slice(0, tok.indexOf("="))
-        // The key must not be present with ANY value: `container=0` from a catalog stencil
-        // has to be overwritten, which is what appending the correct value does.
-        const has = new RegExp(`(?:^|;)${key}=[^;]*;`).test(s)
-        if (has) {
-            s = s.replace(new RegExp(`(?:^|(?<=;))${key}=[^;]*;`, "g"), "")
-        }
-        s = s.endsWith(";") || s === "" ? s : `${s};`
-        s += `${tok};`
-    }
-    return s
-}
-
-function append(style: string, key: string, value: string | number): string {
-    const cleaned = key.startsWith("dai_")
-        ? style.replace(new RegExp(`(?:^|(?<=;))${key}=[^;]*;`, "g"), "")
-        : style
-    const base =
-        cleaned.endsWith(";") || cleaned === "" ? cleaned : `${cleaned};`
-    return `${base}${key}=${value};`
-}
-
-/**
- * Stamp a container's style: make it a real draw.io container and record its
- * layout parameters.
- *
- * Appends rather than rewrites. Duplicate keys are legal and the last one wins, so
- * a catalog style that already says `container=1` is unharmed, and one that says
- * nothing (or `container=0`) is corrected.
- */
-export function stampContainer(
-    style: string,
-    opts: {
-        kind: "group" | "grid"
-        dir: Direction
-        gap: number
-        cols?: number
-        /** Layout-only wrapper: emit a real cell, but draw nothing. */
-        invisible?: boolean
-    },
-): string {
-    let s = style.endsWith(";") || style === "" ? style : `${style};`
-    // Appended only when not already there. These are plain mxGraph keys, so `append`'s
-    // de-duplication (which is limited to `dai_*`) does not cover them — and a container
-    // goes through here on EVERY re-layout, so a blind `+=` grew the style string by
-    // another `container=1;pointerEvents=0;collapsible=0;recursiveResize=0;` per round
-    // trip, without bound. Harmless to draw.io, which takes the last value, but the XML
-    // never reached a fixed point and every edit shipped a longer style.
-    s = appendOnce(s, CONTAINER_TOKENS)
-    if (opts.invisible) s = appendOnce(s, INVISIBLE_TOKENS)
-    s = append(s, MARKER.kind, opts.kind)
-    s = append(s, MARKER.dir, opts.dir)
-    s = append(s, MARKER.gap, Math.round(opts.gap))
-    if (opts.kind === "grid" && opts.cols != null)
-        s = append(s, MARKER.cols, Math.max(1, Math.round(opts.cols)))
-    return s
-}
-
-/**
- * Stamp a swimlane pool: its lane names, milestone labels and orientation.
- *
- * Unlike a group, a pool is NOT stamped as a draw.io container. Its lane bands are separate
- * cells sitting inside it, and they are what a shape should reparent into when the user
- * drags it — that is how "the user moved this step to a different role" gets recorded. If
- * the pool itself claimed the drop, every node would come back in lane 0.
- */
-export function stampPool(
-    style: string,
-    opts: {
-        lanes: string[]
-        phases: string[]
-        orientation: "horizontal" | "vertical"
-        gap: number
-    },
-): string {
-    let s = append(style, MARKER.kind, "pool")
-    s = append(s, MARKER.lanes, joinList(opts.lanes))
-    s = append(s, MARKER.phases, joinList(opts.phases))
-    s = append(s, MARKER.orient, opts.orientation === "vertical" ? "v" : "h")
-    return append(s, MARKER.gap, Math.round(opts.gap))
-}
-
-/** Stamp a sequence container: participant spacing and message spacing. */
-export function stampSequence(
-    style: string,
-    opts: { gap: number; step: number },
-): string {
-    const s = append(style, MARKER.kind, "sequence")
-    return append(
-        append(s, MARKER.gap, Math.round(opts.gap)),
-        MARKER.step,
-        Math.round(opts.step),
-    )
-}
-
-/** Stamp a radial container: how it fans branches out, and the ring spacing. */
-export function stampRadial(
-    style: string,
-    opts: { spread: "radial" | "down"; gap: number },
-): string {
-    const s = append(style, MARKER.kind, "radial")
-    return append(
-        append(s, MARKER.spread, opts.spread),
-        MARKER.gap,
-        Math.round(opts.gap),
-    )
-}
-
-/**
- * Stamp one of a pool's lane bands.
- *
- * A band IS a draw.io container, so dragging a step onto another role's band reparents it
- * there and the marker on the band tells the parser which lane that is. The lane index is
- * the band's identity, not its position, so the assignment survives the pool being
- * re-measured to a different size.
- */
-export function stampLane(style: string, lane: number): string {
-    let s = style.endsWith(";") || style === "" ? style : `${style};`
-    s += CONTAINER_TOKENS
-    return append(s, MARKER.lane, Math.max(0, Math.round(lane)))
-}
-
-/**
- * Stamp a pool's own decoration — a lane-name column or a milestone strip.
- *
- * `dai_lane=-1` marks it as chrome the renderer rebuilds, so the parser drops it rather
- * than reading it back as a node. Unlike a lane band it is deliberately NOT a draw.io
- * container: a step dropped on a label column belongs to no role, and letting it reparent
- * there would lose the step's lane.
- */
-export function stampPoolDecoration(style: string): string {
-    return append(style, MARKER.lane, -1)
-}
-
-/** Record which pool cell a node occupies. */
-export function stampCell(
-    style: string,
-    cell: { lane: number; col: number },
-): string {
-    return append(
-        style,
-        MARKER.cell,
-        `${Math.max(0, Math.round(cell.lane))},${Math.max(0, Math.round(cell.col))}`,
-    )
-}
-
-/**
- * Is this an invisible layout wrapper? Both colours set to `none` and no group
- * stencil — a visible frame always has a stroke or a stencil.
- */
-export function isInvisible(style: string): boolean {
-    if (/grIcon=/.test(style)) return false
-    const fill = readMarker(style, "fillColor")
-    const stroke = readMarker(style, "strokeColor")
-    return fill === "none" && stroke === "none"
-}
-
-/**
- * Stamp a leaf with its kind, so the parser need not infer it.
- *
- * For an icon, also record the catalog name: an Azure or GCP icon's style is an embedded
- * base64 image with no name in it, so the style alone cannot identify which icon it is.
- */
-export function stampLeaf(
-    style: string,
-    kind: "icon" | "box" | "title",
-    opts: { name?: string } = {},
-): string {
-    const s = append(style, MARKER.kind, kind)
-    return opts.name ? append(s, MARKER.name, opts.name) : s
-}
-
-/** Stamp the node's information role, replacing any previous one. */
-export function stampRole(style: string, role: string): string {
-    return append(style, MARKER.role, role)
-}
-
-/** Stamp the node's semantic zone, replacing any previous one. */
-export function stampGroup(style: string, group: string): string {
-    return append(style, MARKER.group, encodeURIComponent(group))
-}
-
-/** Stamp the declared shape token, so the round trip carries the declaration itself. */
-export function stampShape(style: string, shape: string): string {
-    return append(style, MARKER.shape, encodeURIComponent(shape))
-}
-
-/** Mark a node's size as engine-computed, so a re-layout re-measures it. */
-export function stampAuto(style: string): string {
-    return append(style, MARKER.auto, 1)
-}
-
-/** Was this node's size computed by the engine (vs fixed by the user or the model)? */
-export function isAutoSized(style: string): boolean {
-    return readMarker(style, MARKER.auto) === "1"
-}
-
-type FlexAlign = "start" | "center" | "end" | "stretch"
-type FlexJustify = "start" | "center" | "end" | "between" | "around" | "evenly"
-
-/** Stamp the flex fields a node carries, so a round-trip preserves them. */
-export function stampFlex(
-    style: string,
-    opts: {
-        grow?: number
-        align?: FlexAlign
-        justify?: FlexJustify
-        alignItems?: FlexAlign
-        maxW?: number
-        minW0?: boolean
-        pad?: number
-    },
-): string {
-    let s = style
-    if (opts.grow != null && opts.grow > 0)
-        s = append(s, MARKER.grow, opts.grow)
-    if (opts.align && opts.align !== "center")
-        s = append(s, MARKER.align, opts.align)
-    if (opts.justify && opts.justify !== "start")
-        s = append(s, MARKER.justify, opts.justify)
-    if (opts.alignItems) s = append(s, MARKER.alignItems, opts.alignItems)
-    if (opts.maxW != null && opts.maxW > 0)
-        s = append(s, MARKER.maxw, Math.round(opts.maxW))
-    if (opts.minW0) s = append(s, MARKER.minw0, 1)
-    if (opts.pad != null) s = append(s, MARKER.pad, Math.round(opts.pad))
-    return s
-}
-
-/** Read the align marker back. Anything unrecognised means the default (center). */
-export function readAlign(style: string): Exclude<FlexAlign, "center"> | null {
-    const v = readMarker(style, MARKER.align)
-    return v === "start" || v === "end" || v === "stretch" ? v : null
-}
-
-/** Read a container's cross-axis default. Null means it declared none. */
-export function readAlignItems(style: string): FlexAlign | null {
-    const v = readMarker(style, MARKER.alignItems)
-    return v === "start" || v === "end" || v === "stretch" || v === "center"
-        ? v
-        : null
-}
-
-/** Read the justify marker back. Anything unrecognised means the default (start). */
-export function readJustify(
-    style: string,
-): Exclude<FlexJustify, "start"> | null {
-    const v = readMarker(style, MARKER.justify)
-    return v === "center" ||
-        v === "end" ||
-        v === "between" ||
-        v === "around" ||
-        v === "evenly"
-        ? v
-        : null
-}
-
-/** Read the declared width cap back, or null when there was none. */
-export function readMaxW(style: string): number | null {
-    const v = Number(readMarker(style, MARKER.maxw))
-    return Number.isFinite(v) && v > 0 ? v : null
-}
-
-/** Did this node opt out of the content-width floor? */
-export function readMinW0(style: string): boolean {
-    return readMarker(style, MARKER.minw0) === "1"
-}
-
-/** The page's declared aspect ratio, stamped on the default layer. */
-export function stampAspect(layerXml: string, aspect: number): string {
-    return layerXml.replace(
-        /<mxCell id="1" parent="0"\/>/,
-        `<mxCell id="1" parent="0" style="${MARKER.aspect}=${aspect};"/>`,
-    )
-}
-
-/**
- * Read the page's declared aspect back out of a model body.
- *
- * Scans for the marker anywhere in the page rather than parsing the layer cell: the
- * marker name is namespaced, so a match cannot be anything else, and this keeps working
- * if draw.io ever reorders or reformats that cell.
- */
-export function readAspect(page: string): number | undefined {
-    const m = new RegExp(`${MARKER.aspect}=([\\d.]+)`).exec(page)
-    if (!m) return undefined
-    const v = Number(m[1])
-    return Number.isFinite(v) && v > 0
-        ? Math.min(4, Math.max(0.25, v))
-        : undefined
-}
-
-/** Strip every `dai_*` marker — for exporting a clean file, or comparing styles. */
-export function stripMarkers(style: string): string {
-    return style
-        .split(";")
-        .filter((tok) => tok !== "" && !tok.startsWith("dai_"))
-        .join(";")
-        .concat(";")
-        .replace(/^;$/, "")
-}
-
-/** Does this style carry any engine marker? Used to tell engine output from imported files. */
-export function hasMarkers(style: string): boolean {
-    return /(?:^|;)dai_[a-z]+=/.test(style)
-}
@@ -1,235 +0,0 @@
-/**
- * The shape vocabulary: what a box can BE, beyond a labelled rectangle.
- *
- * draw.io ships hundreds of shapes; the engine's declarative layer used to allow six.
- * That gap — not colours, not spacing — was why engine output looked flat next to
- * hand-written XML: a database drawn as a grey rectangle labelled "database" instead of
- * a cylinder. This module opens the vocabulary in two tiers:
- *
- *   CATALOG — ~20 curated shapes the engine fully understands. Each entry carries the
- *   complete style fragment (including the matching `perimeter=`, which draw.io's own
- *   style reference warns is required or edges connect to the bounding box), how much
- *   larger the box must be for its text to fit inside the non-rectangular outline
- *   (verified empirically in the real editor: a rhombus needs ~1.5× the rectangle's
- *   size for the same text), and whether the label renders below the glyph instead of
- *   inside it.
- *
- *   PASS-THROUGH — any other token that looks like a draw.io shape name is emitted
- *   verbatim as `shape=<token>;`. Verified in the real editor: an unknown token
- *   degrades to a rectangle, it does not break the page. A conservative text scale
- *   covers the common case that the real shape is roughly convex. The tool response
- *   carries a near-match hint ("cyclinder → cylinder?") so a typo is a one-turn fix,
- *   not a silent permanent degradation.
- *
- * Style strings are merged structurally, not concatenated: each fragment is parsed to
- * key=value tokens and later fragments override earlier ones per key. This is what
- * makes shape and theme composable by rule — the shape fragment owns geometry keys
- * (shape, perimeter, rounded…), the theme owns colour and type keys, and an overlap
- * (a theme that says rounded=1 on a rhombus) resolves by order instead of emitting
- * two conflicting tokens.
- */
-
-/** How a known shape renders and measures. */
-export interface ShapeSpec {
-    /** Geometry style tokens ONLY — no colours, no fonts; those belong to the theme. */
-    style: string
-    /**
-     * How much larger than a rectangle the box must be for the same text to fit
-     * inside the outline. 1.0 for the rectangle family; ~1.5 for a rhombus, whose
-     * inscribed rectangle is half its bounding box.
-     */
-    textScale: number
-    /** The label renders below the glyph, not inside it (umlActor and friends). */
-    labelOutside?: boolean
-    /** Fixed glyph size for labelOutside shapes, which do not scale with text. */
-    glyph?: { w: number; h: number }
-}
-
-/**
- * The curated catalog. Keys are the vocabulary the model is taught; several are
- * semantic aliases for the same geometry (decision/diamond), because the model will
- * reach for both names.
- */
-export const SHAPE_CATALOG: Record<string, ShapeSpec> = {
-    // ---- the rectangle family (the original six) ----
-    box: { style: "rounded=0;", textScale: 1 },
-    round: { style: "rounded=1;arcSize=12;", textScale: 1 },
-    terminator: { style: "rounded=1;arcSize=50;", textScale: 1.15 },
-    decision: {
-        style: "rhombus;perimeter=rhombusPerimeter;",
-        textScale: 1.5,
-    },
-    diamond: {
-        style: "rhombus;perimeter=rhombusPerimeter;",
-        textScale: 1.5,
-    },
-    data: {
-        style: "shape=parallelogram;perimeter=parallelogramPerimeter;fixedSize=1;size=14;",
-        textScale: 1.2,
-    },
-    document: { style: "shape=document;boundedLbl=1;", textScale: 1.15 },
-
-    // ---- the semantic vocabulary (D2's tier: a node that IS a thing) ----
-    /** A database or datastore. */
-    cylinder: {
-        style: "shape=cylinder3;boundedLbl=1;backgroundOutline=1;size=12;",
-        textScale: 1.3,
-    },
-    /** A message queue: a cylinder on its side. */
-    queue: {
-        style: "shape=cylinder3;direction=south;boundedLbl=1;backgroundOutline=1;size=12;",
-        textScale: 1.3,
-    },
-    /** An actor or user. Label below the figure. */
-    person: {
-        style: "shape=umlActor;verticalLabelPosition=bottom;verticalAlign=top;outlineConnect=0;",
-        textScale: 1,
-        labelOutside: true,
-        glyph: { w: 40, h: 60 },
-    },
-    /** An external system, the internet. */
-    cloud: { style: "ellipse;shape=cloud;", textScale: 1.6 },
-    /** A service or process step. */
-    hexagon: {
-        style: "shape=hexagon;perimeter=hexagonPerimeter2;fixedSize=1;size=16;",
-        textScale: 1.25,
-    },
-    /** A concept, state or category. */
-    ellipse: { style: "ellipse;", textScale: 1.3 },
-    /** A speech-bubble annotation. */
-    callout: {
-        style: "shape=callout;perimeter=calloutPerimeter;rounded=1;size=16;position=0.5;base=24;",
-        textScale: 1.35,
-    },
-    /** A chevron stage in a pipeline. */
-    step: {
-        style: "shape=step;perimeter=stepPerimeter;fixedSize=1;size=16;",
-        textScale: 1.2,
-    },
-    /** A sticky note. */
-    note: { style: "shape=note;size=14;", textScale: 1.1 },
-    /** A card with a cut corner. */
-    card: { style: "shape=card;size=14;", textScale: 1.1 },
-    /** A process box with side bars (predefined subroutine). */
-    process: { style: "shape=process;size=0.1;", textScale: 1.2 },
-    /** Punched tape — legacy data, files. */
-    tape: { style: "shape=tape;size=0.2;", textScale: 1.3 },
-    /** A double-walled cube. */
-    cube: { style: "shape=cube;size=12;", textScale: 1.25 },
-}
-
-/** A shape token that may pass through unrecognised: draw.io style-key charset only. */
-const SAFE_TOKEN = /^[a-zA-Z0-9._]+$/
-
-export interface ResolvedShape {
-    spec: ShapeSpec
-    /** Set when the token was not in the catalog and passed through verbatim. */
-    passthrough?: boolean
-}
-
-/**
- * Resolve a shape token: catalog entry, safe pass-through, or null for a token that
- * could inject style keys (`;`/`=`/quotes) and must be rejected outright.
- */
-export function resolveShape(token: string): ResolvedShape | null {
-    const known = SHAPE_CATALOG[token]
-    if (known) return { spec: known }
-    if (!SAFE_TOKEN.test(token)) return null
-    // Unknown but safe: emit verbatim. draw.io degrades an unregistered shape to a
-    // rectangle, so the worst case is a plain box — same as before the vocabulary
-    // existed. The conservative scale covers roughly-convex real shapes.
-    return {
-        spec: { style: `shape=${token};`, textScale: 1.25 },
-        passthrough: true,
-    }
-}
-
-/** The catalog key most similar to a token, for "did you mean" hints. */
-export function nearestShape(token: string): string | null {
-    const t = token.toLowerCase()
-    let best: string | null = null
-    let bestD = 3 // more than 2 edits away is not a typo
-    for (const key of Object.keys(SHAPE_CATALOG)) {
-        const d = editDistance(t, key.toLowerCase(), bestD)
-        if (d < bestD) {
-            bestD = d
-            best = key
-        }
-    }
-    return best
-}
-
-/** Bounded Levenshtein distance; returns limit when the strings are further apart. */
-function editDistance(a: string, b: string, limit: number): number {
-    if (Math.abs(a.length - b.length) >= limit) return limit
-    const prev = new Array(b.length + 1)
-    for (let j = 0; j <= b.length; j++) prev[j] = j
-    for (let i = 1; i <= a.length; i++) {
-        let diag = prev[0]
-        prev[0] = i
-        let rowMin = prev[0]
-        for (let j = 1; j <= b.length; j++) {
-            const cur = Math.min(
-                prev[j] + 1,
-                prev[j - 1] + 1,
-                diag + (a[i - 1] === b[j - 1] ? 0 : 1),
-            )
-            diag = prev[j]
-            prev[j] = cur
-            if (cur < rowMin) rowMin = cur
-        }
-        if (rowMin >= limit) return limit
-    }
-    return Math.min(prev[b.length], limit)
-}
-
-// ---- structured style merge ----
-
-/**
- * Merge style fragments by key, later fragments winning.
- *
- * A draw.io style is `tok;key=value;key=value;` — bare class tokens (rhombus, ellipse,
- * text) come first and key=value pairs follow. String concatenation made every
- * conflict a duplicate key resolved by draw.io's last-wins rule, which worked until
- * shape fragments and theme fragments both owned geometry keys (a theme's rounded=1
- * against a shape's rhombus). Merging structurally keeps exactly one token per key and
- * one bare-token set, so the output is canonical and the ownership rule — theme owns
- * colour and type, shape owns geometry — is enforced by fragment ORDER, not by hoping
- * the keys never meet.
- *
- * Bare tokens are kept in first-appearance order, except that a later fragment's bare
- * SHAPE CLASS (rhombus/ellipse/triangle) replaces an earlier one — two shape classes
- * on one cell is a contradiction, not a union.
- */
-export function mergeStyle(...fragments: (string | undefined)[]): string {
-    const bare: string[] = []
-    const kv = new Map<string, string>()
-    const SHAPE_CLASSES = new Set(["rhombus", "ellipse", "triangle"])
-    for (const f of fragments) {
-        if (!f) continue
-        for (const tok of f.split(";")) {
-            if (tok === "") continue
-            const eq = tok.indexOf("=")
-            if (eq < 0) {
-                if (SHAPE_CLASSES.has(tok)) {
-                    const i = bare.findIndex((b) => SHAPE_CLASSES.has(b))
-                    if (i >= 0) bare.splice(i, 1)
-                }
-                if (!bare.includes(tok)) bare.push(tok)
-                continue
-            }
-            const key = tok.slice(0, eq)
-            kv.set(key, tok.slice(eq + 1))
-            // An explicit shape= also displaces a bare shape class from an earlier
-            // fragment — same contradiction as two bare classes.
-            if (key === "shape") {
-                const i = bare.findIndex((b) => SHAPE_CLASSES.has(b))
-                if (i >= 0) bare.splice(i, 1)
-            }
-        }
-    }
-    let out = bare.join(";")
-    if (out) out += ";"
-    for (const [k, v] of kv) out += `${k}=${v};`
-    return out
-}
@@ -1,265 +0,0 @@
-/**
- * The theme: design tokens plus one composition rule, in place of style tables.
- *
- * The engine's original deal was: the model declares structure, the engine computes
- * geometry. But every box rendered identically — white, 11px, black border — so anything
- * whose meaning lives in visual hierarchy (a paper-summary poster, a cheat sheet, a
- * comparison panel) came out flat, and the only escape was hand-written XML with no layout
- * guarantees at all.
- *
- * Two ideas fix that generally, not per diagram type:
- *
- *   ROLE — what a node IS in the information hierarchy: a masthead, a section heading, a
- *   key number, fine print. The model judges this well. Each role maps to a type size and
- *   an emphasis (filled / outlined / ghost), not to any colour.
- *
- *   GROUP — which semantic zone a node belongs to: remote vs local, one poster section vs
- *   another. Each distinct group name gets one HUE RAMP — a light tint, a mid stroke, a
- *   dark text colour — assigned in order of first appearance.
- *
- * `themedStyle(role, hue, kind)` composes the two by rule. A heading container in group 2
- * gets that hue's tint as its panel and the dark step for its title; a metric in the same
- * group gets the mid step as a heavy border. Nothing is enumerated per combination, so a
- * new diagram kind gets full theming by tagging its nodes — there is no table to extend.
- * The model never sees a hex value; the same declaration always renders the same way.
- */
-
-/** What a node is, in the information hierarchy of the diagram. */
-export type Role =
-    | "banner" //   the masthead: large type on the theme's one dark field
-    | "heading" //  a section title / titled panel
-    | "body" //     ordinary content (the default look)
-    | "callout" //  something the reader must not miss
-    | "good" //     a positive verdict (always green, group or not)
-    | "bad" //      a negative verdict or warning (always red)
-    | "metric" //   the key number
-    | "muted" //    fine print
-
-export const ROLES: readonly Role[] = [
-    "banner",
-    "heading",
-    "body",
-    "callout",
-    "good",
-    "bad",
-    "metric",
-    "muted",
-]
-
-export function isRole(v: string | null | undefined): v is Role {
-    return ROLES.includes(v as Role)
-}
-
-// ---- tokens ----
-
-/** One hue, three steps: a field to sit on, a line to draw with, a colour to write in. */
-export interface HueRamp {
-    tint: string
-    base: string
-    dark: string
-}
-
-/**
- * The hue ramps groups draw from, in assignment order.
- *
- * Tint/base pairs are draw.io's classic palette, so themed output looks native to the
- * editor; the dark step is the same hue pulled down far enough for 4.5:1 text on white.
- */
-export const HUES: readonly HueRamp[] = [
-    { tint: "#DAE8FC", base: "#6C8EBF", dark: "#1A237E" }, // blue
-    { tint: "#D5E8D4", base: "#82B366", dark: "#1B5E20" }, // green
-    { tint: "#FFE6CC", base: "#D79B00", dark: "#8A5A00" }, // orange
-    { tint: "#E1D5E7", base: "#9673A6", dark: "#4A2E5E" }, // purple
-    { tint: "#F8CECC", base: "#B85450", dark: "#7F1D1D" }, // red
-    { tint: "#FFF2CC", base: "#D6B656", dark: "#7A5C00" }, // yellow
-]
-
-/** The neutral ramp, for ungrouped nodes: today's grey-on-white look. */
-export const NEUTRAL: HueRamp = {
-    tint: "#F5F8FB",
-    base: "#5A6B7B",
-    dark: "#1A1A1A",
-}
-
-/** Semantic verdict hues: good is green and bad is red no matter what group says. */
-const GOOD: HueRamp = { tint: "#D5E8D4", base: "#82B366", dark: "#1B5E20" }
-const BAD: HueRamp = { tint: "#F8CECC", base: "#B85450", dark: "#7F1D1D" }
-/** The callout field: a warm highlight distinct from every group tint. */
-const CALLOUT: HueRamp = { tint: "#FFF9C4", base: "#B8860B", dark: "#6D4C00" }
-
-/** Type scale, px. One scale for every diagram kind. */
-export const TYPE = { xs: 9, sm: 11, md: 13, lg: 15, xl: 20 } as const
-
-/** The hue ramp for the n-th distinct group. Wraps: a 7th group reuses the 1st hue. */
-export function hueOf(index: number): HueRamp {
-    return HUES[index % HUES.length]
-}
-
-// ---- the composition rule ----
-
-/** How a role renders, independent of colour. */
-interface RoleSpec {
-    size: number
-    bold: boolean
-    /** filled: dark field, light text. tinted: hue field. outlined: white field, hue border.
-     *  ghost: no field, no border — pure text. */
-    emphasis: "filled" | "tinted" | "outlined" | "ghost"
-    /** Overrides the group hue; verdicts stay green/red whatever zone they sit in. */
-    hue?: HueRamp
-    /** Fill the container's cross axis, the way a masthead spans its page. */
-    stretch?: boolean
-    /** Minimum cell height. */
-    minH: number
-    /** Character width relative to 11px type, for the measure pass. */
-    charScale: number
-}
-
-/** The masthead field when no group says otherwise: the deep navy of the first hue. */
-const BANNER: HueRamp = { tint: "#DAE8FC", base: "#6C8EBF", dark: "#1A237E" }
-
-const ROLE_SPECS: Record<Role, RoleSpec> = {
-    banner: {
-        size: TYPE.xl,
-        bold: true,
-        emphasis: "filled",
-        hue: BANNER,
-        stretch: true,
-        minH: 64,
-        charScale: 1.8,
-    },
-    heading: {
-        size: TYPE.lg,
-        bold: true,
-        emphasis: "ghost",
-        stretch: true,
-        minH: 32,
-        charScale: 1.35,
-    },
-    body: {
-        size: TYPE.sm,
-        bold: false,
-        emphasis: "outlined",
-        minH: 44,
-        charScale: 1,
-    },
-    callout: {
-        size: TYPE.sm,
-        bold: true,
-        emphasis: "tinted",
-        hue: CALLOUT,
-        minH: 44,
-        charScale: 1,
-    },
-    good: {
-        size: TYPE.sm,
-        bold: false,
-        emphasis: "tinted",
-        hue: GOOD,
-        minH: 44,
-        charScale: 1,
-    },
-    bad: {
-        size: TYPE.sm,
-        bold: false,
-        emphasis: "tinted",
-        hue: BAD,
-        minH: 44,
-        charScale: 1,
-    },
-    metric: {
-        size: TYPE.xl,
-        bold: true,
-        emphasis: "outlined",
-        minH: 56,
-        charScale: 1.8,
-    },
-    muted: {
-        size: TYPE.xs,
-        bold: false,
-        emphasis: "ghost",
-        minH: 24,
-        charScale: 0.82,
-    },
-}
-
-/**
- * Does this role already draw itself with no border?
- *
- * The parser needs this to tell a THEME's `strokeColor=none` from a DECLARED one. A banner is
- * a dark filled slab and a heading is ghost text; both are borderless because of what they
- * are, not because anyone asked. Recording that as an explicit override would make it
- * outlive a later role change, since `set_role` clears a node's style but keeps its text
- * overrides.
- *
- * Leaf only: the container branch of `themedStyle` always draws a border, whatever the role.
- */
-export function roleIsBorderless(
-    role: Role | undefined,
-    kind: "leaf" | "container",
-): boolean {
-    if (kind === "container") return false
-    const e = ROLE_SPECS[role ?? "body"].emphasis
-    return e === "filled" || e === "ghost"
-}
-
-/** Metrics the measure pass needs, so layout reserves what render will draw. */
-export function roleMetrics(role: Role | undefined): {
-    fontSize: number
-    minH: number
-    charScale: number
-    stretch: boolean
-} {
-    const s = ROLE_SPECS[role ?? "body"]
-    return {
-        fontSize: s.size,
-        minH: s.minH,
-        charScale: s.charScale,
-        stretch: s.stretch === true,
-    }
-}
-
-/**
- * The style tokens for one node: the whole theme in a single rule.
- *
- * `hue` is the node's group ramp (or the neutral ramp); a role with a semantic hue
- * (good/bad/callout) overrides it. `kind` softens the treatment for containers — a
- * section panel is a field its children sit on, so it takes the tint at panel weight
- * rather than a leaf's full treatment.
- */
-export function themedStyle(
-    role: Role,
-    hue: HueRamp,
-    kind: "leaf" | "container",
-): string {
-    const spec = ROLE_SPECS[role]
-    const ramp = spec.hue ?? hue
-    const size = kind === "container" && role === "banner" ? TYPE.lg : spec.size
-    const font = `fontSize=${size};${spec.bold || kind === "container" ? "fontStyle=1;" : ""}`
-
-    if (spec.emphasis === "filled")
-        return `fillColor=${ramp.dark};strokeColor=none;fontColor=#FFFFFF;${font}rounded=1;arcSize=6;`
-
-    if (kind === "container") {
-        // A panel: the tint as a quiet field, the dark step for its title, the base for
-        // its border. This is where "every section gets its own colour" comes from —
-        // a heading container plus a group, no extra mechanism.
-        return `fillColor=${ramp.tint};strokeColor=${ramp.base};fontColor=${ramp.dark};${font}verticalAlign=top;align=left;spacingLeft=10;spacingTop=6;`
-    }
-
-    if (spec.emphasis === "ghost")
-        return `fillColor=none;strokeColor=none;fontColor=${ramp.dark};${font}align=left;`
-
-    if (spec.emphasis === "tinted") {
-        // A callout keeps a heavy left bar, the editor's convention for "note well".
-        const bar = role === "callout" ? `strokeWidth=2;` : ""
-        return `fillColor=${ramp.tint};strokeColor=${ramp.base};fontColor=${ramp.dark};${bar}${font}`
-    }
-
-    // outlined: the hue carried by the border and text. A grouped ordinary node takes its
-    // zone's tint as the field — colour-as-grouping is the whole point of naming a zone —
-    // while an ungrouped one stays white. A metric stays white either way, so its number
-    // sits on the page's calmest field with the hue in a heavy border.
-    const weight = role === "metric" ? "strokeWidth=2;" : ""
-    const field = role === "body" && ramp !== NEUTRAL ? ramp.tint : "#FFFFFF"
-    return `fillColor=${field};strokeColor=${ramp.base};fontColor=${ramp.dark};${weight}${font}`
-}
--- a/Show More
+++ b/Show More