fix(mcp-server): fix XSS and crashes, make XML validation strict

- Validate and escape the mcp session id; only serve localhost Host/Origin
- Malformed URLs and session ids return errors instead of crashing the process
- Strict XML syntax check with saxes (linkedom never reports parse errors)
- autoFixXml no longer corrupts valid XML; attribute newlines serialized as entities
- Sessions stay alive while polled; browser pushes carry a base version (409 on conflict)
- Page tools respect the edit gate; UTF-8 bodies decoded correctly
- Export replies matched to requests and serialized; xml sync export handled
- UserObject/object cells addressable by id; history restored by stable id; logs off stdout

.github/CONTRIBUTING.md

@@ -47,6 +47,10 @@ 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
@@ -57,6 +61,21 @@ npx playwright test --ui
 
 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.

.github/renovate.json

@@ -1,7 +1,7 @@
 {
     "$schema": "https://docs.renovatebot.com/renovate-schema.json",
     "extends": ["config:recommended"],
-    "schedule": ["after 10am on saturday"],
+    "schedule": ["after 10am on the first day of the month"],
     "timezone": "Asia/Tokyo",
     "packageRules": [
         {
@@ -13,6 +13,7 @@
         {
             "matchUpdateTypes": ["major"],
             "matchPackagePatterns": ["*"],
+            "groupName": "major dependencies",
             "automerge": false
         },
         {
@@ -32,6 +33,11 @@
             "matchPackagePatterns": ["@ai-sdk/*", "ai", "next"],
             "groupName": "Core framework packages",
             "automerge": false
+        },
+        {
+            "matchPackageNames": ["@biomejs/biome"],
+            "groupName": "Biome",
+            "automerge": false
         }
     ],
     "vulnerabilityAlerts": {

.github/workflows/auto-format.yml

@@ -23,7 +23,9 @@ jobs:
           node-version: '24'
 
       - name: Run Biome format
-        run: npx @biomejs/biome@latest check --write --no-errors-on-unmatched .
+        # 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 .
 
       - name: Check for changes
         id: changes

.github/workflows/ci.yml

@@ -40,5 +40,3 @@ jobs:
       - name: Build
         run: npm run build
 
-      - name: Security audit
-        run: npm audit --audit-level=high --omit=dev

.github/workflows/docker-build.yml

@@ -58,6 +58,8 @@ jobs:
         with:
           context: .
           push: ${{ github.event_name != 'pull_request' }}
+          provenance: mode=max
+          sbom: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
@@ -89,4 +91,3 @@ jobs:
           docker pull ghcr.io/${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
-

.github/workflows/electron-release.yml

@@ -11,7 +11,8 @@ on:
         required: false
 
 jobs:
-  build:
+  # Mac and Linux: Build and publish directly (no signing needed)
+  build-mac-linux:
     permissions:
       contents: write
     strategy:
@@ -20,13 +21,9 @@ jobs:
         include:
           - os: macos-latest
             platform: mac
-          - os: windows-latest
-            platform: win
           - os: ubuntu-latest
             platform: linux
-
     runs-on: ${{ matrix.os }}
-
     steps:
       - name: Checkout code
         uses: actions/checkout@v6
@@ -37,10 +34,80 @@ 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
 
-      - name: Build and publish Electron app
+      - name: Build and publish
         run: npm run dist:${{ matrix.platform }}
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  # Windows: Build, sign with SignPath, then publish
+  build-windows:
+    permissions:
+      contents: write
+    runs-on: windows-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v6
+        with:
+          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
+
+      # Build WITHOUT publishing
+      - name: Build Windows app
+        run: npm run dist:win:build
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Upload unsigned artifacts for signing
+        uses: actions/upload-artifact@v6
+        id: upload-unsigned
+        with:
+          name: windows-unsigned
+          path: release/*.exe
+          retention-days: 1
+
+      - name: Sign with SignPath
+        uses: signpath/github-action-submit-signing-request@v2
+        with:
+          api-token: ${{ secrets.SIGNPATH_API_TOKEN }}
+          organization-id: '880a211d-2cd3-4e7b-8d04-3d1f8eb39df5'
+          project-slug: 'next-ai-draw-io'
+          signing-policy-slug: 'release-signing'
+          artifact-configuration-slug: 'windows-exe'
+          github-artifact-id: ${{ steps.upload-unsigned.outputs.artifact-id }}
+          wait-for-completion: true
+          output-artifact-directory: release-signed
+
+      - name: Upload signed artifacts to release
+        uses: softprops/action-gh-release@v2
+        with:
+          files: release-signed/*.exe
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/publish-mcp.yml

@@ -0,0 +1,67 @@
+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

.github/workflows/test.yml

@@ -11,10 +11,10 @@ jobs:
     name: Lint & Unit Tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: "20"
           cache: "npm"
@@ -28,14 +28,24 @@ 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
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: "20"
           cache: "npm"
@@ -44,7 +54,7 @@ jobs:
         run: npm ci
 
       - name: Cache Playwright browsers
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         id: playwright-cache
         with:
           path: ~/.cache/ms-playwright
@@ -67,7 +77,7 @@ jobs:
           CI: true
 
       - name: Upload test results
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         if: always()
         with:
           name: playwright-report

.gitignore

@@ -56,6 +56,8 @@ push-via-ec2.sh
 /dist-electron/
 /release/
 /electron-standalone/
+# Draw.io static files (downloaded during CI build)
+public/drawio/
 *.dmg
 *.exe
 *.AppImage
@@ -67,4 +69,13 @@ CLAUDE.md
 .spec-workflow
 
 # edgeone
-.edgeone
+.edgeone
+opencode.json
+ai-models.json
+
+# local backups
+*.bak
+.gstack/
+
+# admin panel settings (contains secrets)
+data/

Dockerfile

@@ -9,6 +9,7 @@ WORKDIR /app
 COPY package.json package-lock.json* ./
 
 # Install dependencies
+ARG ELECTRON_SKIP_BINARY_DOWNLOAD=1
 RUN npm install
 
 # Stage 2: Build application
@@ -34,6 +35,11 @@ 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
 
@@ -55,6 +61,9 @@ 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

README.md

@@ -19,7 +19,18 @@ 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://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!
+> 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!
+
+<p align="center">
+  <a href="https://www.atlascloud.ai/?utm_source=github&utm_medium=link&utm_campaign=next-ai-draw-io">
+    <picture>
+      <source media="(prefers-color-scheme: dark)" srcset="./public/atlas-cloud-logo-white.svg">
+      <img src="./public/atlas-cloud-logo.svg" alt="Atlas Cloud" width="200">
+    </picture>
+  </a>
+</p>
+
+> 🎁 Thanks to **[Atlas Cloud](https://www.atlascloud.ai/?utm_source=github&utm_medium=link&utm_campaign=next-ai-draw-io)** for sponsoring next-ai-draw-io. Its OpenAI-compatible API gives diagram workflows one provider connection for DeepSeek, Qwen, GLM, Kimi, MiniMax, and more. Budget-friendly access is available through the [Coding Plan](https://www.atlascloud.ai/console/coding-plan).
 
 
 https://github.com/user-attachments/assets/9d60a3e8-4a1c-4b5e-acbb-26af2d3eabd1
@@ -31,7 +42,7 @@ https://github.com/user-attachments/assets/9d60a3e8-4a1c-4b5e-acbb-26af2d3eabd1
   - [Table of Contents](#table-of-contents)
   - [Examples](#examples)
   - [Features](#features)
-  - [MCP Server (Preview)](#mcp-server-preview)
+  - [MCP Server](#mcp-server)
     - [Claude Code CLI](#claude-code-cli)
   - [Getting Started](#getting-started)
     - [Try it Online](#try-it-online)
@@ -40,11 +51,14 @@ https://github.com/user-attachments/assets/9d60a3e8-4a1c-4b5e-acbb-26af2d3eabd1
     - [Installation](#installation)
   - [Deployment](#deployment)
     - [Deploy to EdgeOne Pages](#deploy-to-edgeone-pages)
-    - [Deploy on Vercel (Recommended)](#deploy-on-vercel-recommended)
+    - [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)
   - [Star History](#star-history)
 
 ## Examples
@@ -62,24 +76,24 @@ Here are some example prompts and their generated diagrams:
   </tr>
   <tr>
     <td width="50%" valign="top">
-      <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" />
+      <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" />
     </td>
     <td width="50%" valign="top">
-      <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" />
+      <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" />
     </td>
   </tr>
   <tr>
     <td width="50%" valign="top">
-      <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" />
+      <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" />
     </td>
     <td width="50%" valign="top">
-      <strong>Cat sketch prompt</strong><br />
+      <strong>Cat sketch</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>
@@ -98,9 +112,7 @@ Here are some example prompts and their generated diagrams:
 -   **Cloud Architecture Diagram Support**: Specialized support for generating cloud architecture diagrams (AWS, GCP, Azure)
 -   **Animated Connectors**: Create dynamic and animated connectors between diagram elements for better visualization
 
-## MCP Server (Preview)
-
-> **Preview Feature**: This feature is experimental and may not be stable.
+## MCP Server
 
 Use Next AI Draw.io with AI agents like Claude Desktop, Cursor, and VS Code via MCP (Model Context Protocol).
 
@@ -185,7 +197,7 @@ Check out the [Tencent EdgeOne Pages documentation](https://pages.edgeone.ai/doc
 
 Additionally, deploying through Tencent EdgeOne Pages will also grant you a [daily free quota for DeepSeek models](https://pages.edgeone.ai/document/edge-ai).
 
-### Deploy on Vercel (Recommended)
+### Deploy on Vercel 
 
 [![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2FDayuanJiang%2Fnext-ai-draw-io)
 
@@ -201,24 +213,38 @@ See the [Next.js deployment documentation](https://nextjs.org/docs/app/building-
 
 ## Multi-Provider Support
 
--   [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)
+-   [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)
 -   AWS Bedrock (default)
 -   OpenAI
 -   Anthropic
 -   Google AI
+-   Google Vertex AI
 -   Azure OpenAI
 -   Ollama
 -   OpenRouter
+-   AIHubMix
 -   DeepSeek
 -   SiliconFlow
+-   ModelScope
 -   SGLang
 -   Vercel AI Gateway
+-   [Atlas Cloud](https://www.atlascloud.ai/?utm_source=github&utm_medium=link&utm_campaign=next-ai-draw-io)
 
 
 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.
@@ -237,7 +263,9 @@ Diagrams are represented as XML that can be rendered in draw.io. The AI processe
 
 ## Support & Contact
 
-**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!
+**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 [Atlas Cloud](https://www.atlascloud.ai/?utm_source=github&utm_medium=link&utm_campaign=next-ai-draw-io) for sponsoring next-ai-draw-io and supporting its multi-provider ecosystem!** Try its OpenAI-compatible LLM API through the [Atlas Cloud Coding Plan](https://www.atlascloud.ai/console/coding-plan).
 
 If you find this project useful, please consider [sponsoring](https://github.com/sponsors/DayuanJiang) to help me host the live demo site!
 
@@ -245,6 +273,10 @@ For support or inquiries, please open an issue on the GitHub repository or conta
 
 -   Email: me[at]jiang.jp
 
+## FAQ
+
+See [FAQ](./docs/en/FAQ.md) for common issues and solutions.
+
 ## Star History
 
 [![Star History Chart](https://api.star-history.com/svg?repos=DayuanJiang/next-ai-draw-io&type=date&legend=top-left)](https://www.star-history.com/#DayuanJiang/next-ai-draw-io&type=date&legend=top-left)

app/[lang]/about/cn/page.tsx

@@ -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",
@@ -10,18 +10,7 @@ export const metadata: Metadata = {
     keywords: ["AI图表", "draw.io", "AWS架构", "GCP图表", "Azure图表", "LLM"],
 }
 
-function formatNumber(num: number): string {
-    if (num >= 1000) {
-        return `${num / 1000}k`
-    }
-    return num.toString()
-}
-
 export default function AboutCN() {
-    const dailyRequestLimit = Number(process.env.DAILY_REQUEST_LIMIT) || 20
-    const dailyTokenLimit = Number(process.env.DAILY_TOKEN_LIMIT) || 500000
-    const tpmLimit = Number(process.env.TPM_LIMIT) || 50000
-
     return (
         <div className="min-h-screen bg-gray-50">
             {/* Navigation */}
@@ -89,7 +78,7 @@ export default function AboutCN() {
                                 <p>
                                     好消息！感谢{" "}
                                     <a
-                                        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"
+                                        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"
                                         className="font-semibold text-blue-600 hover:underline"
@@ -98,7 +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">
-                                        K2-thinking
+                                        glm-4.7
                                     </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">
@@ -108,40 +97,21 @@ export default function AboutCN() {
                                 </p>
                             </div>
 
-                            {/* Usage Limits */}
-                            <p className="text-sm text-gray-600 mb-3">
-                                当前使用限制：
-                            </p>
-                            <div className="grid grid-cols-3 gap-3 mb-5">
-                                <div className="text-center p-3 bg-white/60 rounded-lg">
-                                    <p className="text-lg font-bold text-amber-600">
-                                        {formatNumber(dailyRequestLimit)}
-                                    </p>
-                                    <p className="text-xs text-gray-500">
-                                        请求/天
-                                    </p>
-                                </div>
-                                <div className="text-center p-3 bg-white/60 rounded-lg">
-                                    <p className="text-lg font-bold text-amber-600">
-                                        {formatNumber(dailyTokenLimit)}
-                                    </p>
-                                    <p className="text-xs text-gray-500">
-                                        Token/天
-                                    </p>
-                                </div>
-                                <div className="text-center p-3 bg-white/60 rounded-lg">
-                                    <p className="text-lg font-bold text-amber-600">
-                                        {formatNumber(tpmLimit)}
-                                    </p>
-                                    <p className="text-xs text-gray-500">
-                                        Token/分钟
-                                    </p>
-                                </div>
-                            </div>
-
-                            {/* Divider */}
-                            <div className="flex items-center gap-3 my-5">
-                                <div className="flex-1 h-px bg-gradient-to-r from-transparent via-amber-300 to-transparent" />
+                            {/* 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 */}
@@ -205,92 +175,106 @@ export default function AboutCN() {
                     </p>
 
                     <div className="space-y-8">
-                        {/* Animated Transformer */}
+                        {/* ResNet50 Architecture */}
                         <div className="text-center">
                             <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                动画Transformer连接器
+                                ResNet50模型架构动画
                             </h3>
                             <p className="text-gray-600 mb-4">
-                                <strong>提示词：</strong> 给我一个带有
-                                <strong>动画连接器</strong>的Transformer架构图。
+                                <strong>Prompt:</strong> Give me an{" "}
+                                <strong>animated</strong> architecture diagram
+                                of the ResNet50 model.
                             </p>
-                            <Image
-                                src="/animated_connectors.svg"
-                                alt="带动画连接器的Transformer架构"
-                                width={480}
-                                height={360}
-                                className="mx-auto"
-                            />
+                            <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>
                         </div>
 
-                        {/* Cloud Architecture Grid */}
+                        {/* Diagram 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">
-                                    GCP架构图
+                                    RAG技术图
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <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。
+                                    <strong>Prompt:</strong> Generate a RAG
+                                    architecture diagram for{" "}
+                                    <strong>chat application</strong>. Use
+                                    connected diagram for data ingestion
                                 </p>
-                                <Image
-                                    src="/gcp_demo.svg"
-                                    alt="GCP架构图"
-                                    width={400}
-                                    height={300}
-                                    className="mx-auto"
-                                />
+                                <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>
                             </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    AWS架构图
+                                    React和AWS认证流程
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <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。
+                                    <strong>Prompt:</strong> Generate
+                                    authentication process using React with{" "}
+                                    <strong>AWS</strong>. Use Serverless
+                                    architecture.
                                 </p>
-                                <Image
-                                    src="/aws_demo.svg"
-                                    alt="AWS架构图"
-                                    width={400}
-                                    height={300}
-                                    className="mx-auto"
-                                />
+                                <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>
                             </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    Azure架构图
+                                    敏捷Scrum流程
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <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。
+                                    <strong>Prompt:</strong> Generate agile
+                                    scrum workflow diagram for software
+                                    development team.
                                 </p>
-                                <Image
-                                    src="/azure_demo.svg"
-                                    alt="Azure架构图"
-                                    width={400}
-                                    height={300}
-                                    className="mx-auto"
-                                />
+                                <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>
                             </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    猫咪素描
+                                    开放式创新
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>提示词：</strong>{" "}
-                                    给我画一只可爱的猫。
+                                    <strong>Prompt:</strong> Create
+                                    visualization of Henry Chesbrough&apos;s
+                                    Open Innovation model.
                                 </p>
-                                <Image
-                                    src="/cat_demo.svg"
-                                    alt="猫咪绘图"
-                                    width={240}
-                                    height={240}
-                                    className="mx-auto"
-                                />
+                                <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>
                             </div>
                         </div>
                     </div>
@@ -324,7 +308,7 @@ export default function AboutCN() {
                     <ul className="list-disc pl-6 text-gray-700 space-y-1">
                         <li>
                             <a
-                                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"
+                                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"
                                 className="text-blue-600 hover:underline"
@@ -339,11 +323,13 @@ 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>
                         <li>DeepSeek</li>
                         <li>SiliconFlow</li>
+                        <li>ModelScope</li>
                     </ul>
                     <p className="text-gray-700 mt-4">
                         注意：<code>claude-sonnet-4-5</code>{" "}
@@ -357,7 +343,7 @@ export default function AboutCN() {
                     <p className="text-gray-700 mb-4 font-semibold">
                         特别感谢{" "}
                         <a
-                            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"
+                            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"
                             className="text-blue-600 hover:underline"

app/[lang]/about/ja/page.tsx

@@ -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",
@@ -17,18 +17,7 @@ export const metadata: Metadata = {
     ],
 }
 
-function formatNumber(num: number): string {
-    if (num >= 1000) {
-        return `${num / 1000}k`
-    }
-    return num.toString()
-}
-
 export default function AboutJA() {
-    const dailyRequestLimit = Number(process.env.DAILY_REQUEST_LIMIT) || 20
-    const dailyTokenLimit = Number(process.env.DAILY_TOKEN_LIMIT) || 500000
-    const tpmLimit = Number(process.env.TPM_LIMIT) || 50000
-
     return (
         <div className="min-h-screen bg-gray-50">
             {/* Navigation */}
@@ -97,7 +86,7 @@ export default function AboutJA() {
                                 <p>
                                     朗報です！
                                     <a
-                                        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"
+                                        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"
                                         className="font-semibold text-blue-600 hover:underline"
@@ -106,7 +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">
-                                        K2-thinking
+                                        glm-4.7
                                     </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">
@@ -116,42 +105,6 @@ export default function AboutJA() {
                                 </p>
                             </div>
 
-                            {/* Usage Limits */}
-                            <p className="text-sm text-gray-600 mb-3">
-                                現在の使用制限：
-                            </p>
-                            <div className="grid grid-cols-3 gap-3 mb-5">
-                                <div className="text-center p-3 bg-white/60 rounded-lg">
-                                    <p className="text-lg font-bold text-amber-600">
-                                        {formatNumber(dailyRequestLimit)}
-                                    </p>
-                                    <p className="text-xs text-gray-500">
-                                        リクエスト/日
-                                    </p>
-                                </div>
-                                <div className="text-center p-3 bg-white/60 rounded-lg">
-                                    <p className="text-lg font-bold text-amber-600">
-                                        {formatNumber(dailyTokenLimit)}
-                                    </p>
-                                    <p className="text-xs text-gray-500">
-                                        トークン/日
-                                    </p>
-                                </div>
-                                <div className="text-center p-3 bg-white/60 rounded-lg">
-                                    <p className="text-lg font-bold text-amber-600">
-                                        {formatNumber(tpmLimit)}
-                                    </p>
-                                    <p className="text-xs text-gray-500">
-                                        トークン/分
-                                    </p>
-                                </div>
-                            </div>
-
-                            {/* Divider */}
-                            <div className="flex items-center gap-3 my-5">
-                                <div className="flex-1 h-px bg-gradient-to-r from-transparent via-amber-300 to-transparent" />
-                            </div>
-
                             {/* Bring Your Own Key */}
                             <div className="text-center">
                                 <h4 className="text-base font-bold text-gray-900 mb-2">
@@ -215,93 +168,106 @@ export default function AboutJA() {
                     </p>
 
                     <div className="space-y-8">
-                        {/* Animated Transformer */}
+                        {/* ResNet50 Architecture */}
                         <div className="text-center">
                             <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                アニメーションTransformerコネクタ
+                                ResNet50モデルアーキテクチャアニメーション
                             </h3>
                             <p className="text-gray-600 mb-4">
-                                <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。
+                                <strong>Prompt:</strong> Give me an{" "}
+                                <strong>animated</strong> architecture diagram
+                                of the ResNet50 model.
                             </p>
-                            <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 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>
                         </div>
 
-                        {/* Cloud Architecture Grid */}
+                        {/* Diagram 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">
-                                    GCPアーキテクチャ図
+                                    RAG技術ダイアグラム
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <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。
+                                    <strong>Prompt:</strong> Generate a RAG
+                                    architecture diagram for{" "}
+                                    <strong>chat application</strong>. Use
+                                    connected diagram for data ingestion
                                 </p>
-                                <Image
-                                    src="/gcp_demo.svg"
-                                    alt="GCPアーキテクチャ図"
-                                    width={400}
-                                    height={300}
-                                    className="mx-auto"
-                                />
+                                <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>
                             </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    AWSアーキテクチャ図
+                                    ReactとAWSによる認証
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <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。
+                                    <strong>Prompt:</strong> Generate
+                                    authentication process using React with{" "}
+                                    <strong>AWS</strong>. Use Serverless
+                                    architecture.
                                 </p>
-                                <Image
-                                    src="/aws_demo.svg"
-                                    alt="AWSアーキテクチャ図"
-                                    width={400}
-                                    height={300}
-                                    className="mx-auto"
-                                />
+                                <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>
                             </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    Azureアーキテクチャ図
+                                    アジャイルスクラムプロセス
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <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。
+                                    <strong>Prompt:</strong> Generate agile
+                                    scrum workflow diagram for software
+                                    development team.
                                 </p>
-                                <Image
-                                    src="/azure_demo.svg"
-                                    alt="Azureアーキテクチャ図"
-                                    width={400}
-                                    height={300}
-                                    className="mx-auto"
-                                />
+                                <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>
                             </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    猫のスケッチ
+                                    オープンイノベーション
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>プロンプト：</strong>{" "}
-                                    かわいい猫を描いてください。
+                                    <strong>Prompt:</strong> Create
+                                    visualization of Henry Chesbrough&apos;s
+                                    Open Innovation model.
                                 </p>
-                                <Image
-                                    src="/cat_demo.svg"
-                                    alt="猫の絵"
-                                    width={240}
-                                    height={240}
-                                    className="mx-auto"
-                                />
+                                <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>
                             </div>
                         </div>
                     </div>
@@ -339,7 +305,7 @@ export default function AboutJA() {
                     <ul className="list-disc pl-6 text-gray-700 space-y-1">
                         <li>
                             <a
-                                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"
+                                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"
                                 className="text-blue-600 hover:underline"
@@ -354,11 +320,13 @@ 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>
                         <li>DeepSeek</li>
                         <li>SiliconFlow</li>
+                        <li>ModelScope</li>
                     </ul>
                     <p className="text-gray-700 mt-4">
                         注：<code>claude-sonnet-4-5</code>
@@ -372,7 +340,7 @@ 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://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"
+                            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"
                             className="text-blue-600 hover:underline"

app/[lang]/about/page.tsx

@@ -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",
@@ -17,18 +17,7 @@ export const metadata: Metadata = {
     ],
 }
 
-function formatNumber(num: number): string {
-    if (num >= 1000) {
-        return `${num / 1000}k`
-    }
-    return num.toString()
-}
-
 export default function About() {
-    const dailyRequestLimit = Number(process.env.DAILY_REQUEST_LIMIT) || 20
-    const dailyTokenLimit = Number(process.env.DAILY_TOKEN_LIMIT) || 500000
-    const tpmLimit = Number(process.env.TPM_LIMIT) || 50000
-
     return (
         <div className="min-h-screen bg-gray-50">
             {/* Navigation */}
@@ -98,7 +87,7 @@ export default function About() {
                                     Great news! Thanks to the generous
                                     sponsorship from{" "}
                                     <a
-                                        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"
+                                        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"
                                         className="font-semibold text-blue-600 hover:underline"
@@ -107,7 +96,7 @@ export default function About() {
                                     </a>
                                     , the demo site now uses the powerful{" "}
                                     <span className="font-semibold text-amber-700">
-                                        K2-thinking
+                                        glm-4.7
                                     </span>{" "}
                                     model for better diagram generation! Sign up
                                     via the link to get{" "}
@@ -118,42 +107,6 @@ export default function About() {
                                 </p>
                             </div>
 
-                            {/* Usage Limits */}
-                            <p className="text-sm text-gray-600 mb-3">
-                                Please note the current usage limits:
-                            </p>
-                            <div className="grid grid-cols-3 gap-3 mb-5">
-                                <div className="text-center p-3 bg-white/60 rounded-lg">
-                                    <p className="text-lg font-bold text-amber-600">
-                                        {formatNumber(dailyRequestLimit)}
-                                    </p>
-                                    <p className="text-xs text-gray-500">
-                                        requests/day
-                                    </p>
-                                </div>
-                                <div className="text-center p-3 bg-white/60 rounded-lg">
-                                    <p className="text-lg font-bold text-amber-600">
-                                        {formatNumber(dailyTokenLimit)}
-                                    </p>
-                                    <p className="text-xs text-gray-500">
-                                        tokens/day
-                                    </p>
-                                </div>
-                                <div className="text-center p-3 bg-white/60 rounded-lg">
-                                    <p className="text-lg font-bold text-amber-600">
-                                        {formatNumber(tpmLimit)}
-                                    </p>
-                                    <p className="text-xs text-gray-500">
-                                        tokens/min
-                                    </p>
-                                </div>
-                            </div>
-
-                            {/* Divider */}
-                            <div className="flex items-center gap-3 my-5">
-                                <div className="flex-1 h-px bg-gradient-to-r from-transparent via-amber-300 to-transparent" />
-                            </div>
-
                             {/* Bring Your Own Key */}
                             <div className="text-center">
                                 <h4 className="text-base font-bold text-gray-900 mb-2">
@@ -229,96 +182,106 @@ export default function About() {
                     </p>
 
                     <div className="space-y-8">
-                        {/* Animated Transformer */}
+                        {/* ResNet50 Architecture */}
                         <div className="text-center">
                             <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                Animated Transformer Connectors
+                                Animated ResNet50 Model Architecture
                             </h3>
                             <p className="text-gray-600 mb-4">
                                 <strong>Prompt:</strong> Give me an{" "}
-                                <strong>animated connector</strong> diagram of
-                                transformer&apos;s architecture.
+                                <strong>animated</strong> architecture diagram
+                                of the ResNet50 model.
                             </p>
-                            <Image
-                                src="/animated_connectors.svg"
-                                alt="Transformer Architecture with Animated Connectors"
-                                width={480}
-                                height={360}
-                                className="mx-auto"
-                            />
+                            <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>
                         </div>
 
-                        {/* Cloud Architecture Grid */}
+                        {/* Diagram 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">
-                                    GCP Architecture Diagram
+                                    RAG Technique Diagram
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate a GCP
-                                    architecture diagram with{" "}
-                                    <strong>GCP icons</strong>. Users connect to
-                                    a frontend hosted on an instance.
+                                    <strong>Prompt:</strong> Generate a RAG
+                                    architecture diagram for{" "}
+                                    <strong>chat application</strong>. Use
+                                    connected diagram for data ingestion
                                 </p>
-                                <Image
-                                    src="/gcp_demo.svg"
-                                    alt="GCP Architecture Diagram"
-                                    width={400}
-                                    height={300}
-                                    className="mx-auto"
-                                />
+                                <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>
                             </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    AWS Architecture Diagram
+                                    Authentication using React and AWS
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate an AWS
-                                    architecture diagram with{" "}
-                                    <strong>AWS icons</strong>. Users connect to
-                                    a frontend hosted on an instance.
+                                    <strong>Prompt:</strong> Generate
+                                    authentication process using React with{" "}
+                                    <strong>AWS</strong>. Use Serverless
+                                    architecture.
                                 </p>
-                                <Image
-                                    src="/aws_demo.svg"
-                                    alt="AWS Architecture Diagram"
-                                    width={400}
-                                    height={300}
-                                    className="mx-auto"
-                                />
+                                <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>
                             </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    Azure Architecture Diagram
+                                    Agile Scrum Process
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate an Azure
-                                    architecture diagram with{" "}
-                                    <strong>Azure icons</strong>. Users connect
-                                    to a frontend hosted on an instance.
+                                    <strong>Prompt:</strong> Generate agile
+                                    scrum workflow diagram for software
+                                    development team.
                                 </p>
-                                <Image
-                                    src="/azure_demo.svg"
-                                    alt="Azure Architecture Diagram"
-                                    width={400}
-                                    height={300}
-                                    className="mx-auto"
-                                />
+                                <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>
                             </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    Cat Sketch
+                                    Open Innovation
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Draw a cute cat for
-                                    me.
+                                    <strong>Prompt:</strong> Create
+                                    visualization of Henry Chesbrough&apos;s
+                                    Open Innovation model.
                                 </p>
-                                <Image
-                                    src="/cat_demo.svg"
-                                    alt="Cat Drawing"
-                                    width={240}
-                                    height={240}
-                                    className="mx-auto"
-                                />
+                                <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>
                             </div>
                         </div>
                     </div>
@@ -358,7 +321,7 @@ export default function About() {
                     <ul className="list-disc pl-6 text-gray-700 space-y-1">
                         <li>
                             <a
-                                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"
+                                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"
                                 className="text-blue-600 hover:underline"
@@ -373,11 +336,13 @@ 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>
                         <li>DeepSeek</li>
                         <li>SiliconFlow</li>
+                        <li>ModelScope</li>
                     </ul>
                     <p className="text-gray-700 mt-4">
                         Note that <code>claude-sonnet-4-5</code> has trained on
@@ -393,7 +358,7 @@ export default function About() {
                     <p className="text-gray-700 mb-4 font-semibold">
                         Special thanks to{" "}
                         <a
-                            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"
+                            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"
                             className="text-blue-600 hover:underline"

app/[lang]/admin/admin-shared.ts

@@ -0,0 +1,65 @@
+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
+}

app/[lang]/admin/models-section.tsx

@@ -0,0 +1,621 @@
+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,
+    generateId,
+    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
+                                value=""
+                                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,
+    envHasDefaultModel,
+    disabled,
+    password,
+    onChange,
+}: {
+    providers: AdminProvider[]
+    envProviders: EnvProvider[]
+    envHasDefaultModel: boolean
+    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:${p.name}` === selectedId)
+
+    const addProvider = (provider: ProviderName) => {
+        const newProvider: AdminProvider = {
+            // generateId works over plain HTTP; crypto.randomUUID needs HTTPS
+            id: generateId(),
+            provider,
+            models: [],
+            // Only the very first provider becomes the default, and only when
+            // the env config has no default that it would replace on save
+            isDefault:
+                providers.length === 0 &&
+                !envProviders.some((p) => p.isDefault) &&
+                !envHasDefaultModel,
+        }
+        onChange([...providers, newProvider])
+        setSelectedId(newProvider.id)
+    }
+
+    const updateProvider = (id: string, patch: Partial<AdminProvider>) => {
+        onChange(
+            providers.map((p) => {
+                if (p.id !== id) {
+                    // Only one default at a time
+                    return patch.isDefault ? { ...p, isDefault: false } : p
+                }
+                return { ...p, ...patch }
+            }),
+        )
+    }
+
+    const deleteProvider = (id: string) => {
+        const next = providers.filter((p) => p.id !== id)
+        onChange(next)
+        setSelectedId(next[0]?.id ?? null)
+    }
+
+    return (
+        <div className="flex min-h-72 flex-col sm:flex-row">
+            {/* Provider list */}
+            <div className="flex w-full shrink-0 flex-col border-b sm:w-52 sm:border-b-0 sm:border-r">
+                <div className="flex-1 space-y-1 p-2">
+                    {providers.length === 0 && envProviders.length === 0 && (
+                        <p className="px-2 py-6 text-center text-xs text-muted-foreground">
+                            {dict.admin.addProviderHint}
+                        </p>
+                    )}
+                    {envProviders.map((p) => (
+                        <button
+                            key={`env:${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">
+                    {/* Always empty so picking the same type again still fires */}
+                    <Select
+                        value=""
+                        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>
+    )
+}

app/[lang]/admin/page.tsx

@@ -0,0 +1,645 @@
+"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)]
+
+// For each toggleable group, whether any of its settings has a value (from
+// the settings file or the environment)
+function groupsWithValues(map: SettingsMap): Record<string, boolean> {
+    const result: Record<string, boolean> = {}
+    for (const group of SETTING_GROUPS) {
+        if (!group.toggleable) continue
+        result[group.id] = !!SETTINGS_BY_GROUP.get(group.id)?.some(
+            (d) => map[d.key]?.source !== "default",
+        )
+    }
+    return result
+}
+
+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[]>([])
+    // Whether .env itself sets AI_MODEL (a default the panel would override)
+    const [envHasDefaultModel, setEnvHasDefaultModel] = useState(false)
+    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)
+            // A group stays on while it still has values (e.g. from env vars
+            // that saving can't remove); a user's explicit "on" for a group
+            // with no values yet is kept across saves
+            setEnabledGroups((prev) => {
+                const next = groupsWithValues(map)
+                for (const id of Object.keys(next)) {
+                    next[id] = next[id] || !!prev[id]
+                }
+                return next
+            })
+        },
+        [],
+    )
+
+    const applyProvidersResponse = useCallback(
+        (data: {
+            providers: AdminProvider[]
+            envProviders?: EnvProvider[]
+            envHasDefaultModel?: boolean
+        }) => {
+            setProviders(data.providers)
+            setSavedProviders(JSON.stringify(data.providers))
+            setEnvProviders(data.envProviders ?? [])
+            setEnvHasDefaultModel(!!data.envHasDefaultModel)
+        },
+        [],
+    )
+
+    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])
+
+    // value undefined drops the pending change (back to the saved value)
+    const handleChange = useCallback(
+        (key: string, value: string | null | undefined) => {
+            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 (value === undefined || 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 of saved values; drop unsaved input
+                        if (settings[key]?.source === "default")
+                            delete next[key]
+                        else 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}
+                                envHasDefaultModel={envHasDefaultModel}
+                                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]
+                        // Values from env vars can't be removed here, so the
+                        // group can't be turned off from the panel
+                        const envLocked = defs.some(
+                            (d) => settings[d.key]?.source === "env",
+                        )
+                        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
+                                            title={
+                                                envLocked
+                                                    ? dict.admin.sourceEnvTitle
+                                                    : undefined
+                                            }
+                                            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 ||
+                                                    envLocked
+                                                }
+                                                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))
+                                        setEnabledGroups(
+                                            groupsWithValues(settings),
+                                        )
+                                    }}
+                                >
+                                    {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>
+    )
+}

app/[lang]/admin/setting-field.tsx

@@ -0,0 +1,317 @@
+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 to revert to on empty. Refreshed whenever the parent
+    // passes server state (a marker or nothing), e.g. after a save.
+    const [original, setOriginal] = useState(value)
+    if (typeof value !== "string" && value !== original) setOriginal(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
+    // undefined drops the pending change (back to the saved value)
+    onChange: (value: string | null | undefined) => 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">
+                    {/* Clearing a saved secret reverts to it; the X button deletes */}
+                    <SecretInput
+                        id={inputId}
+                        keepOnEmpty={source === "file"}
+                        value={
+                            isDirty
+                                ? (pendingValue ?? "")
+                                : (secretState ?? undefined)
+                        }
+                        disabled={disabled}
+                        onChange={(v) =>
+                            onChange(typeof v === "string" ? v : undefined)
+                        }
+                    />
+                </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>
+    )
+}

app/[lang]/layout.tsx

@@ -41,19 +41,24 @@ 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 } ? rawLang : "en") as Locale
+    const lang = (
+        rawLang in { en: 1, zh: 1, ja: 1, "zh-Hant": 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 {
@@ -80,7 +85,14 @@ export async function generateMetadata({
             type: "website",
             url: "https://next-ai-drawio.jiang.jp",
             siteName: "Next AI Draw.io",
-            locale: lang === "zh" ? "zh_CN" : lang === "ja" ? "ja_JP" : "en_US",
+            locale:
+                lang === "zh"
+                    ? "zh_CN"
+                    : lang === "zh-Hant"
+                      ? "zh_HK"
+                      : lang === "ja"
+                        ? "ja_JP"
+                        : "en_US",
             images: [
                 {
                     url: "/architecture.png",
@@ -115,6 +127,7 @@ export async function generateMetadata({
                 en: "/en",
                 zh: "/zh",
                 ja: "/ja",
+                "zh-Hant": "/zh-Hant",
             },
         },
     }

app/[lang]/page.tsx

@@ -4,35 +4,39 @@ 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, onDrawioLoad, resetDrawioReady } =
-        useDiagram()
+    const {
+        drawioRef,
+        handleDiagramExport,
+        handleDiagramAutoSave,
+        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<"min" | "sketch">("min")
+    const [drawioUi, setDrawioUi] = useState<DrawioTheme>("kennedy")
     const [darkMode, setDarkMode] = useState(false)
     const [isLoaded, setIsLoaded] = useState(false)
     const [isDrawioReady, setIsDrawioReady] = useState(false)
-    const [closeProtection, setCloseProtection] = useState(false)
+    const [isElectron, setIsElectron] = useState(false)
+    const [drawioBaseUrl, setDrawioBaseUrl] = useState(
+        process.env.NEXT_PUBLIC_DRAWIO_BASE_URL || "https://embed.diagrams.net",
+    )
 
     const chatPanelRef = useRef<ImperativePanelHandle>(null)
-    const isMobileRef = useRef(false)
 
     // Load preferences from localStorage after mount
     useEffect(() => {
@@ -43,13 +47,15 @@ export default function Home() {
             const currentLocale = pathParts[0]
             if (currentLocale !== savedLocale) {
                 pathParts[0] = savedLocale
-                router.replace(`/${pathParts.join("/")}`)
+                // Keep the query (e.g. ?session=) and hash
+                const { search, hash } = window.location
+                router.replace(`/${pathParts.join("/")}${search}${hash}`)
                 return // Wait for redirect
             }
         }
 
         const savedUi = localStorage.getItem("drawio-theme")
-        if (savedUi === "min" || savedUi === "sketch") {
+        if (isDrawioTheme(savedUi)) {
             setDrawioUi(savedUi)
         }
 
@@ -66,11 +72,15 @@ export default function Home() {
             document.documentElement.classList.toggle("dark", prefersDark)
         }
 
-        const savedCloseProtection = localStorage.getItem(
-            STORAGE_CLOSE_PROTECTION_KEY,
-        )
-        if (savedCloseProtection === "true") {
-            setCloseProtection(true)
+        // 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`)
         }
 
         setIsLoaded(true)
@@ -90,35 +100,24 @@ export default function Home() {
         resetDrawioReady()
     }
 
-    const handleDrawioUiChange = () => {
-        const newUi = drawioUi === "min" ? "sketch" : "min"
-        localStorage.setItem("drawio-theme", newUi)
-        setDrawioUi(newUi)
+    const handleDrawioUiChange = (theme: DrawioTheme) => {
+        localStorage.setItem("drawio-theme", theme)
+        setDrawioUi(theme)
         setIsDrawioReady(false)
         resetDrawioReady()
     }
 
-    // Check mobile - reset draw.io before crossing breakpoint
-    const isInitialRenderRef = useRef(true)
+    // Check mobile. The draw.io iframe is not remounted when crossing the
+    // breakpoint (only the chat panel is), so its ready state stays as is.
     useEffect(() => {
         const checkMobile = () => {
-            const newIsMobile = window.innerWidth < 768
-            if (
-                !isInitialRenderRef.current &&
-                newIsMobile !== isMobileRef.current
-            ) {
-                setIsDrawioReady(false)
-                resetDrawioReady()
-            }
-            isMobileRef.current = newIsMobile
-            isInitialRenderRef.current = false
-            setIsMobile(newIsMobile)
+            setIsMobile(window.innerWidth < 768)
         }
 
         checkMobile()
         window.addEventListener("resize", checkMobile)
         return () => window.removeEventListener("resize", checkMobile)
-    }, [resetDrawioReady])
+    }, [])
 
     const toggleChatPanel = () => {
         const panel = chatPanelRef.current
@@ -146,20 +145,6 @@ 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
@@ -183,8 +168,10 @@ export default function Home() {
                                     className={`h-full w-full ${isDrawioReady ? "" : "invisible absolute inset-0"}`}
                                 >
                                     <DrawIoEmbed
-                                        key={`${drawioUi}-${darkMode}-${currentLang}`}
+                                        key={`${drawioUi}-${darkMode}-${currentLang}-${isElectron}`}
                                         ref={drawioRef}
+                                        autosave
+                                        onAutoSave={handleDiagramAutoSave}
                                         onExport={handleDiagramExport}
                                         onLoad={handleDrawioLoad}
                                         baseUrl={drawioBaseUrl}
@@ -195,8 +182,17 @@ export default function Home() {
                                             saveAndExit: false,
                                             noSaveBtn: true,
                                             noExitBtn: true,
-                                            dark: darkMode,
-                                            lang: currentLang,
+                                            dark:
+                                                darkMode || drawioUi === "dark",
+                                            // draw.io names Traditional Chinese "zh-tw"
+                                            lang:
+                                                currentLang === "zh-Hant"
+                                                    ? "zh-tw"
+                                                    : currentLang,
+                                            // Enable offline mode in Electron to disable external service calls
+                                            ...(isElectron && {
+                                                offline: true,
+                                            }),
                                         }}
                                     />
                                 </div>
@@ -239,11 +235,10 @@ export default function Home() {
                                 isVisible={isChatVisible}
                                 onToggleVisibility={toggleChatPanel}
                                 drawioUi={drawioUi}
-                                onToggleDrawioUi={handleDrawioUiChange}
+                                onDrawioUiChange={handleDrawioUiChange}
                                 darkMode={darkMode}
                                 onToggleDarkMode={handleDarkModeChange}
                                 isMobile={isMobile}
-                                onCloseProtectionChange={setCloseProtection}
                             />
                         </Suspense>
                     </div>

app/api/admin/providers/route.ts

@@ -0,0 +1,96 @@
+import { checkAdminAuth } from "@/lib/admin/auth"
+import {
+    AdminProvidersSchema,
+    deriveEnvUpdates,
+    loadAdminProviders,
+    maskAdminProviders,
+    mergeSecrets,
+    validateAdminProviders,
+} from "@/lib/admin/providers"
+import {
+    getEnvFallback,
+    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,
+            })) ?? [],
+        // Whether .env sets a default model. getEnvFallback skips the value
+        // the panel overlays onto process.env, so a panel default doesn't count.
+        envHasDefaultModel: !!getEnvFallback("AI_MODEL"),
+    }
+}
+
+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())
+}

app/api/admin/settings/route.ts

@@ -0,0 +1,126 @@
+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(),
+    })
+}

app/api/admin/test-model/route.ts

@@ -0,0 +1,66 @@
+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,
+            }),
+        }),
+    )
+}

app/api/aihubmix-models/route.ts

@@ -0,0 +1,61 @@
+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()
+    }
+}

app/api/chat/route.ts

@@ -12,13 +12,17 @@ import fs from "fs/promises"
 import { jsonrepair } from "jsonrepair"
 import path from "path"
 import { z } from "zod"
+import { checkAccessCode } from "@/lib/access-code"
 import {
     getAIModel,
-    supportsImageInput,
+    SINGLE_SYSTEM_PROVIDERS,
     supportsPromptCaching,
+    usesServerCredentials,
 } from "@/lib/ai-providers"
 import { findCachedResponse } from "@/lib/cached-responses"
 import {
+    dropInvalidToolCalls,
+    fixToolInputJson,
     isMinimalDiagram,
     replaceHistoricalToolInputs,
     validateFileParts,
@@ -29,15 +33,27 @@ import {
     recordTokenUsage,
 } from "@/lib/dynamo-quota-manager"
 import {
+    endTrace,
     getTelemetryConfig,
     setTraceInput,
     setTraceOutput,
     wrapWithObserve,
 } from "@/lib/langfuse"
+import {
+    resolveMaxOutputTokens,
+    withOutputTokenLimitFallback,
+} from "@/lib/output-token-limit"
+import {
+    type FlattenedServerModel,
+    findServerModelById,
+} from "@/lib/server-model-config"
+import { allowPrivateUrls, isPrivateUrl } from "@/lib/ssrf-protection"
 import { getSystemPrompt } from "@/lib/system-prompts"
 import { getUserIdFromRequest } from "@/lib/user-id"
 
-export const maxDuration = 120
+// No explicit cap: a reasoning model can spend minutes planning before it emits
+// the tool call, so take whatever the host allows. Vercel's own default is 300s,
+// which is also where Node's response-body timeout on the upstream stream lands.
 
 // Helper function to create cached stream response
 function createCachedStreamResponse(xml: string): Response {
@@ -69,26 +85,21 @@ function createCachedStreamResponse(xml: string): Response {
     return createUIMessageStreamResponse({ stream })
 }
 
+// Responses streamed from the model, whose trace streamText's callbacks end
+const modelStreamResponses = new WeakSet<Response>()
+
 // Inner handler function
 async function handleChatRequest(req: Request): Promise<Response> {
     // Check for access code
-    const accessCodes =
-        process.env.ACCESS_CODE_LIST?.split(",")
-            .map((code) => code.trim())
-            .filter(Boolean) || []
-    if (accessCodes.length > 0) {
-        const accessCodeHeader = req.headers.get("x-access-code")
-        if (!accessCodeHeader || !accessCodes.includes(accessCodeHeader)) {
-            return Response.json(
-                {
-                    error: "Invalid or missing access code. Please configure it in Settings.",
-                },
-                { status: 401 },
-            )
-        }
-    }
+    const accessDenied = checkAccessCode(req)
+    if (accessDenied) return accessDenied
 
-    const { messages, xml, previousXml, sessionId } = await req.json()
+    const body = await req.json()
+    const { messages, xml, previousXml, sessionId } = body
+    const customSystemMessage =
+        typeof body.customSystemMessage === "string"
+            ? body.customSystemMessage.slice(0, 5000)
+            : ""
 
     // Get user ID for Langfuse tracking and quota
     const userId = getUserIdFromRequest(req)
@@ -117,7 +128,10 @@ 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-ai-provider") &&
+        (req.headers.get("x-ai-api-key") ||
+            req.headers.get("x-aws-access-key-id") ||
+            req.headers.get("x-vertex-api-key"))
     )
 
     // Skip quota check if: quota disabled, user has own API key, or is anonymous
@@ -168,6 +182,7 @@ 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
@@ -176,32 +191,110 @@ async function handleChatRequest(req: Request): Promise<Response> {
         baseUrl = `${origin}/api/edgeai`
     }
 
+    // Same rule as validate-model: with ALLOW_PRIVATE_URLS=false a request may
+    // not point the server at a private or internal address
+    if (baseUrl && !allowPrivateUrls() && (await isPrivateUrl(baseUrl))) {
+        return Response.json(
+            { error: "Private or internal base URLs are not allowed." },
+            { status: 400 },
+        )
+    }
+
     // 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
+    } = {}
+    let serverModel: FlattenedServerModel | null = null
+    if (selectedModelId?.startsWith("server:")) {
+        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 = {
-        provider,
+        // Server model provider takes precedence over client header
+        provider: serverModelConfig.provider || provider,
         baseUrl,
         apiKey: req.headers.get("x-ai-api-key"),
-        modelId: req.headers.get("x-ai-model"),
+        // A server model runs the model it was configured with, whatever the header says
+        modelId: serverModel?.modelId || req.headers.get("x-ai-model"),
         // AWS Bedrock credentials
         awsAccessKeyId: req.headers.get("x-aws-access-key-id"),
         awsSecretAccessKey: req.headers.get("x-aws-secret-access-key"),
         awsRegion: req.headers.get("x-aws-region"),
         awsSessionToken: req.headers.get("x-aws-session-token"),
-        // Pass cookies for EdgeOne Pages authentication
-        ...(provider === "edgeone" &&
-            cookieHeader && {
-                headers: { cookie: cookieHeader },
-            }),
+        // 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, and the access code,
+        // which the EdgeOne function checks too
+        ...(provider === "edgeone" && {
+            headers: {
+                ...(cookieHeader && { cookie: cookieHeader }),
+                "x-access-code": req.headers.get("x-access-code") || "",
+            },
+        }),
     }
 
     // Read minimal style preference from header
     const minimalStyle = req.headers.get("x-minimal-style") === "true"
 
+    console.log(
+        `[Client Overrides] provider: ${clientOverrides.provider}, modelId: ${clientOverrides.modelId}`,
+    )
+
     // Get AI model with optional client overrides
-    const { model, providerOptions, headers, modelId } =
-        getAIModel(clientOverrides)
+    const {
+        model: baseModel,
+        providerOptions,
+        headers,
+        modelId,
+        provider: resolvedProvider,
+    } = getAIModel(clientOverrides)
+
+    // On the server's own keys, only run models the server offers: a server
+    // model picked by id (its model name is fixed above) or one in AI_MODEL.
+    // With their own key, users can run any model.
+    const onServerCredentials = usesServerCredentials(
+        resolvedProvider,
+        clientOverrides,
+    )
+    const envModels =
+        process.env.AI_MODEL?.split(",").map((m) => m.trim()) || []
+    if (onServerCredentials && !serverModel && !envModels.includes(modelId)) {
+        return Response.json(
+            {
+                error: `Model "${modelId}" is not available on this server. Add your own API key in Settings to use it.`,
+            },
+            { status: 400 },
+        )
+    }
+
+    // Retry with a smaller budget if the provider rejects the requested one
+    const model = withOutputTokenLimitFallback(baseModel)
+
+    // The user setting can raise the budget only on their own key (desktop users
+    // can still raise it themselves); on the server's keys it can only lower it
+    const maxOutputTokens = resolveMaxOutputTokens(
+        req.headers.get("x-max-output-tokens"),
+        onServerCredentials,
+    )
+    console.log(`[maxOutputTokens] ${maxOutputTokens}`)
 
     // Check if model supports prompt caching
     const shouldCache = supportsPromptCaching(modelId)
@@ -211,22 +304,19 @@ 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") ||
         []
 
-    // 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 },
-        )
-    }
+    // 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.
 
     // User input only - XML is now in a separate cached system message
     const formattedUserInput = `User input:
@@ -283,32 +373,9 @@ ${userInputText}
     )
 
     // Filter out tool-calls with invalid inputs (from failed repair or interrupted streaming)
-    // Bedrock API rejects messages where toolUse.input is not a valid JSON object
-    enhancedMessages = enhancedMessages
-        .map((msg: any) => {
-            if (msg.role !== "assistant" || !Array.isArray(msg.content)) {
-                return msg
-            }
-            const filteredContent = msg.content.filter((part: any) => {
-                if (part.type === "tool-call") {
-                    // Check if input is a valid object (not null, undefined, or empty)
-                    if (
-                        !part.input ||
-                        typeof part.input !== "object" ||
-                        Object.keys(part.input).length === 0
-                    ) {
-                        console.warn(
-                            `[route.ts] Filtering out tool-call with invalid input:`,
-                            { toolName: part.toolName, input: part.input },
-                        )
-                        return false
-                    }
-                }
-                return true
-            })
-            return { ...msg, content: filteredContent }
-        })
-        .filter((msg: any) => msg.content && msg.content.length > 0)
+    // and their results. Bedrock API rejects messages where toolUse.input is not a valid
+    // JSON object, and every provider rejects a tool result whose call is gone.
+    enhancedMessages = dropInvalidToolCalls(enhancedMessages)
 
     // DEBUG: Log modelMessages structure (what's being sent to AI)
     console.log("[route.ts] Model messages count:", enhancedMessages.length)
@@ -353,7 +420,7 @@ ${userInputText}
                 contentParts.push({
                     type: "image",
                     image: filePart.url,
-                    mimeType: filePart.mediaType,
+                    mediaType: filePart.mediaType,
                 })
             }
 
@@ -383,40 +450,77 @@ ${userInputText}
     }
 
     // System messages with multiple cache breakpoints for optimal caching:
-    // - Breakpoint 1: Static instructions (~1500 tokens) - rarely changes
+    // - Breakpoint 1: System instructions + custom instructions - changes when user updates custom system message
     // - Breakpoint 2: Current XML context - changes per diagram, but constant within a conversation turn
-    // 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${xml || ""}\n"""\n\nIMPORTANT: The "Current diagram XML" is the SINGLE SOURCE OF TRUTH for what's on the canvas right now. The user can manually add, delete, or modify shapes directly in draw.io. Always count and describe elements based on the CURRENT XML, not on what you previously generated. If both previous and current XML are shown, compare them to understand what the user changed. When using edit_diagram, COPY search patterns exactly from the CURRENT XML - attribute order matters!`,
-            ...(shouldCache && {
-                providerOptions: {
-                    bedrock: { cachePoint: { type: "default" } },
-                },
-            }),
-        },
-    ]
+    // Some providers (e.g. MiniMax) don't support multiple system messages
+    // Merge them into a single system message for compatibility
+    // Also merge for OpenAI-compatible providers with custom base URLs (e.g. vLLM, LMStudio)
+    // because open-source model chat templates (Qwen, Llama, etc.) typically reject multiple system messages
+    const isCustomOpenAIEndpoint =
+        resolvedProvider === "openai" &&
+        !!(
+            baseUrl ||
+            process.env.OPENAI_BASE_URL ||
+            (serverModelConfig.baseUrlEnv &&
+                process.env[serverModelConfig.baseUrlEnv])
+        )
+    const isSingleSystemProvider =
+        SINGLE_SYSTEM_PROVIDERS.has(resolvedProvider) || isCustomOpenAIEndpoint
+
+    const xmlContext = `${
+        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.`
+
+    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" } },
+                      },
+                  }),
+              },
+          ]
 
     const allMessages = [...systemMessages, ...enhancedMessages]
 
     const result = streamText({
         model,
-        ...(process.env.MAX_OUTPUT_TOKENS && {
-            maxOutputTokens: parseInt(process.env.MAX_OUTPUT_TOKENS, 10),
-        }),
+        abortSignal: req.signal,
+        // Must be sent: unset means the provider's own default, and Bedrock's is
+        // 4096, enough for a small diagram, so larger ones were cut off mid-attribute.
+        maxOutputTokens,
         stopWhen: stepCountIs(5),
         // Repair truncated tool calls when maxOutputTokens is reached mid-JSON
         experimental_repairToolCall: async ({ toolCall, error }) => {
@@ -434,16 +538,11 @@ ${userInputText}
                 error.name === "AI_InvalidToolInputError"
             ) {
                 try {
-                    // Pre-process to fix common LLM JSON errors that jsonrepair can't handle
-                    let inputToRepair = toolCall.input
-                    if (typeof inputToRepair === "string") {
-                        // Fix `:=` instead of `: ` (LLM sometimes generates this)
-                        inputToRepair = inputToRepair.replace(/:=/g, ": ")
-                        // Fix `= "` instead of `: "`
-                        inputToRepair = inputToRepair.replace(/=\s*"/g, ': "')
-                    }
-                    // Use jsonrepair to fix truncated JSON
-                    const repairedInput = jsonrepair(inputToRepair)
+                    // Pre-process to fix common LLM JSON errors that jsonrepair can't handle,
+                    // then use jsonrepair to fix truncated JSON
+                    const repairedInput = jsonrepair(
+                        fixToolInputJson(toolCall.input),
+                    )
                     console.log(
                         `[repairToolCall] Repaired truncated JSON for tool: ${toolCall.toolName}`,
                     )
@@ -453,26 +552,8 @@ ${userInputText}
                         `[repairToolCall] Failed to repair JSON for tool: ${toolCall.toolName}`,
                         repairError,
                     )
-                    // Return a placeholder input to avoid API errors in multi-step
-                    // The tool will fail gracefully on client side
-                    if (toolCall.toolName === "edit_diagram") {
-                        return {
-                            ...toolCall,
-                            input: {
-                                operations: [],
-                                _error: "JSON repair failed - no operations to apply",
-                            },
-                        }
-                    }
-                    if (toolCall.toolName === "display_diagram") {
-                        return {
-                            ...toolCall,
-                            input: {
-                                xml: "",
-                                _error: "JSON repair failed - empty diagram",
-                            },
-                        }
-                    }
+                    // Keep the original error, so the model and the client see why
+                    // the input was rejected and the model can retry the call
                     return null
                 }
             }
@@ -495,7 +576,7 @@ ${userInputText}
 
             // Record token usage for server-side quota tracking (if enabled)
             // Use totalUsage (cumulative across all steps) instead of usage (final step only)
-            // Include all 4 token types: input, output, cache read, cache write
+            // inputTokens already includes cache reads and writes in AI SDK 6
             if (
                 isQuotaEnabled() &&
                 !hasOwnApiKey &&
@@ -504,12 +585,16 @@ ${userInputText}
             ) {
                 const totalTokens =
                     (totalUsage.inputTokens || 0) +
-                    (totalUsage.outputTokens || 0) +
-                    (totalUsage.cachedInputTokens || 0) +
-                    (totalUsage.inputTokenDetails?.cacheWriteTokens || 0)
+                    (totalUsage.outputTokens || 0)
                 recordTokenUsage(userId, totalTokens)
             }
         },
+        // onFinish is skipped when the stream fails or is aborted, so end the trace here
+        onError: ({ error }) => {
+            console.error(error) // what AI SDK does without an onError
+            endTrace()
+        },
+        onAbort: () => endTrace(),
         tools: {
             // Client-side tool that will be executed on the client
             display_diagram: {
@@ -620,7 +705,7 @@ Available libraries:
 - Networking: cisco19, network, kubernetes, vvd, rack
 - Business: bpmn, lean_mapping
 - General: flowchart, basic, arrows2, infographic, sitemap
-- UI/Mockups: android
+- UI/Mockups: android, material_design
 - Enterprise: citrix, sap, mscae, atlassian
 - Engineering: fluidpower, electrical, pid, cabinets, floorplan
 - Icons: webicons
@@ -665,7 +750,7 @@ Call this tool to get shape names and usage syntax for a specific library.`,
                         if (
                             (error as NodeJS.ErrnoException).code === "ENOENT"
                         ) {
-                            return `Library "${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`
+                            return `Library "${library}" not found. Available: aws4, azure2, gcp2, alibaba_cloud, cisco19, kubernetes, network, bpmn, flowchart, basic, arrows2, vvd, salesforce, citrix, sap, mscae, atlassian, fluidpower, electrical, pid, cabinets, floorplan, webicons, infographic, sitemap, android, material_design, lean_mapping, openstack, rack`
                         }
                         console.error(
                             `[get_shape_library] Error loading "${library}":`,
@@ -681,7 +766,7 @@ Call this tool to get shape names and usage syntax for a specific library.`,
         }),
     })
 
-    return result.toUIMessageStreamResponse({
+    const response = result.toUIMessageStreamResponse({
         sendReasoning: true,
         messageMetadata: ({ part }) => {
             if (part.type === "finish") {
@@ -695,6 +780,8 @@ Call this tool to get shape names and usage syntax for a specific library.`,
             return undefined
         },
     })
+    modelStreamResponses.add(response)
+    return response
 }
 
 // Helper to categorize errors and return appropriate response
@@ -761,11 +848,16 @@ function handleError(error: unknown): Response {
 
 // Wrap handler with error handling
 async function safeHandler(req: Request): Promise<Response> {
+    let response: Response
     try {
-        return await handleChatRequest(req)
+        response = await handleChatRequest(req)
     } catch (error) {
-        return handleError(error)
+        response = handleError(error)
     }
+    // Early returns, cache hits and errors never reach streamText's callbacks,
+    // so their Langfuse trace has to be ended here
+    if (!modelStreamResponses.has(response)) endTrace()
+    return response
 }
 
 // Wrap with Langfuse observe (if configured)

app/api/parse-url/route.ts

@@ -1,62 +1,69 @@
-import { extract } from "@extractus/article-extractor"
+import { extractFromHtml } from "@extractus/article-extractor"
 import { NextResponse } from "next/server"
 import TurndownService from "turndown"
+import { checkAccessCode } from "@/lib/access-code"
+import { isPrivateUrl } from "@/lib/ssrf-protection"
 
 const MAX_CONTENT_LENGTH = 150000 // Match PDF limit
+const MAX_RESPONSE_BYTES = 5 * 1024 * 1024
 const EXTRACT_TIMEOUT_MS = 15000
+const USER_AGENT = "Mozilla/5.0 (compatible; NextAIDrawio/1.0)"
 
-// SSRF protection - block private/internal addresses
-function isPrivateUrl(urlString: string): boolean {
+// 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.
     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)
-            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
+        new TextDecoder(charset)
+        return charset
     } catch {
-        return true // Invalid URL - block it
+        return "utf-8"
     }
 }
 
+// Read the response body, giving up once it passes MAX_RESPONSE_BYTES so a
+// huge download can't exhaust server memory. Returns null when too large.
+async function readLimitedBody(
+    response: Response,
+): Promise<ArrayBuffer | null> {
+    if (Number(response.headers.get("content-length")) > MAX_RESPONSE_BYTES) {
+        return null
+    }
+    if (!response.body) return new ArrayBuffer(0)
+
+    const reader = response.body.getReader()
+    const chunks: Uint8Array[] = []
+    let total = 0
+    while (true) {
+        const { done, value } = await reader.read()
+        if (done) break
+        total += value.byteLength
+        if (total > MAX_RESPONSE_BYTES) {
+            await reader.cancel()
+            return null
+        }
+        chunks.push(value)
+    }
+    return new Blob(chunks as BlobPart[]).arrayBuffer()
+}
+
 export async function POST(req: Request) {
+    const accessError = checkAccessCode(req)
+    if (accessError) return accessError
+
     try {
         const { url } = await req.json()
 
@@ -77,28 +84,61 @@ export async function POST(req: Request) {
             )
         }
 
-        // SSRF protection
-        if (isPrivateUrl(url)) {
+        // 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)) {
             return NextResponse.json(
                 { error: "Cannot access private/internal URLs" },
                 { status: 400 },
             )
         }
-
-        // Extract article content with timeout to avoid tying up server resources
+        // 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.
         const controller = new AbortController()
         const timeoutId = setTimeout(() => {
             controller.abort()
         }, EXTRACT_TIMEOUT_MS)
 
-        let article
+        let html: string
         try {
-            article = await extract(url, undefined, {
-                headers: {
-                    "User-Agent": "Mozilla/5.0 (compatible; NextAIDrawio/1.0)",
-                },
+            const response = await fetch(url, {
+                headers: { "User-Agent": USER_AGENT },
+                redirect: "error",
                 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 readLimitedBody(response)
+            if (!buffer) {
+                return NextResponse.json(
+                    {
+                        error: `Page exceeds the ${MAX_RESPONSE_BYTES / 1024 / 1024} MB download limit`,
+                    },
+                    { status: 413 },
+                )
+            }
+            const charset = detectCharset(contentType, buffer)
+            html = new TextDecoder(charset).decode(buffer)
         } catch (err: any) {
             if (err?.name === "AbortError") {
                 return NextResponse.json(
@@ -106,11 +146,25 @@ export async function POST(req: Request) {
                     { status: 504 },
                 )
             }
-            throw err
+            // 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 },
+            )
         } 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" },

app/api/server-models/route.ts

@@ -0,0 +1,14 @@
+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,
+    })
+}

app/api/validate-diagram/route.ts

@@ -0,0 +1,151 @@
+/**
+ * API endpoint for VLM-based diagram validation.
+ * Accepts a PNG image and streams validation results using useObject-compatible format.
+ */
+
+import { streamObject } from "ai"
+import { checkAccessCode } from "@/lib/access-code"
+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
+
+// Data URL length cap (~3.75 MB of PNG), well above a normal diagram capture
+const MAX_IMAGE_DATA_LENGTH = 5 * 1024 * 1024
+
+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> {
+    // Uses the server's model credentials, so require the access code
+    const accessError = checkAccessCode(req)
+    if (accessError) return accessError
+
+    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 },
+            )
+        }
+
+        if (imageData.length > MAX_IMAGE_DATA_LENGTH) {
+            return Response.json(
+                { error: "Image data too large" },
+                { status: 413 },
+            )
+        }
+
+        // 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)
+    }
+}

app/api/validate-model/route.ts

@@ -3,74 +3,24 @@ 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 { checkAccessCode } from "@/lib/access-code"
+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
@@ -80,9 +30,28 @@ interface ValidateRequest {
     awsAccessKeyId?: string
     awsSecretAccessKey?: string
     awsRegion?: string
+    // Vertex AI specific
+    vertexApiKey?: string // Express Mode API key
+}
+
+// With private URLs blocked, a public baseUrl could still redirect the
+// request to an internal host, so redirects are refused in that case.
+function redirectGuardedFetch(): typeof fetch | undefined {
+    if (allowPrivateUrls()) return undefined
+    return async (input, init) => {
+        const response = await fetch(input, { ...init, redirect: "manual" })
+        if (response.status >= 300 && response.status < 400) {
+            throw new Error("Redirects are not allowed for custom base URLs")
+        }
+        return response
+    }
 }
 
 export async function POST(req: Request) {
+    // Lets the server send requests to arbitrary URLs, so require the access code
+    const accessError = checkAccessCode(req)
+    if (accessError) return accessError
+
     try {
         const body: ValidateRequest = await req.json()
         const {
@@ -93,6 +62,8 @@ export async function POST(req: Request) {
             awsAccessKeyId,
             awsSecretAccessKey,
             awsRegion,
+            // Note: Express Mode only needs vertexApiKey
+            vertexApiKey,
         } = body
 
         if (!provider || !modelId) {
@@ -103,7 +74,7 @@ export async function POST(req: Request) {
         }
 
         // SECURITY: Block SSRF attacks via custom baseUrl
-        if (baseUrl && isPrivateUrl(baseUrl)) {
+        if (baseUrl && !allowPrivateUrls() && (await isPrivateUrl(baseUrl))) {
             return NextResponse.json(
                 { valid: false, error: "Invalid base URL" },
                 { status: 400 },
@@ -121,6 +92,16 @@ 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" },
@@ -128,6 +109,7 @@ export async function POST(req: Request) {
             )
         }
 
+        const guardedFetch = redirectGuardedFetch()
         let model: any
 
         switch (provider) {
@@ -135,6 +117,7 @@ export async function POST(req: Request) {
                 const openai = createOpenAI({
                     apiKey,
                     ...(baseUrl && { baseURL: baseUrl }),
+                    fetch: guardedFetch,
                 })
                 model = openai.chat(modelId)
                 break
@@ -144,6 +127,7 @@ export async function POST(req: Request) {
                 const anthropic = createAnthropic({
                     apiKey,
                     baseURL: baseUrl || "https://api.anthropic.com/v1",
+                    fetch: guardedFetch,
                 })
                 model = anthropic(modelId)
                 break
@@ -153,15 +137,27 @@ export async function POST(req: Request) {
                 const google = createGoogleGenerativeAI({
                     apiKey,
                     ...(baseUrl && { baseURL: baseUrl }),
+                    fetch: guardedFetch,
                 })
                 model = google(modelId)
                 break
             }
 
+            case "vertexai": {
+                const vertex = createVertex({
+                    apiKey: vertexApiKey,
+                    ...(baseUrl && { baseURL: baseUrl }),
+                    fetch: guardedFetch,
+                })
+                model = vertex(modelId)
+                break
+            }
+
             case "azure": {
                 const azure = createOpenAI({
                     apiKey,
                     baseURL: baseUrl,
+                    fetch: guardedFetch,
                 })
                 model = azure.chat(modelId)
                 break
@@ -181,16 +177,41 @@ export async function POST(req: Request) {
                 const openrouter = createOpenRouter({
                     apiKey,
                     ...(baseUrl && { baseURL: baseUrl }),
+                    fetch: guardedFetch,
                 })
                 model = openrouter(modelId)
                 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,
+                        fetch: guardedFetch,
+                    })
+                    model = aihubmixCompatible.chat(modelId)
+                }
+                break
+            }
+
             case "deepseek": {
                 if (baseUrl || apiKey) {
                     const ds = createDeepSeek({
                         apiKey,
                         ...(baseUrl && { baseURL: baseUrl }),
+                        fetch: guardedFetch,
                     })
                     model = ds(modelId)
                 } else {
@@ -202,17 +223,30 @@ export async function POST(req: Request) {
             case "siliconflow": {
                 const sf = createOpenAI({
                     apiKey,
-                    baseURL: baseUrl || "https://api.siliconflow.com/v1",
+                    baseURL: baseUrl || "https://api.siliconflow.cn/v1",
+                    fetch: guardedFetch,
                 })
                 model = sf.chat(modelId)
                 break
             }
 
             case "ollama": {
-                const ollama = createOllama({
-                    baseURL: baseUrl || "http://localhost:11434",
+                // 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",
+                    fetch: guardedFetch,
+                    ...(ollamaApiKey && {
+                        headers: { Authorization: `Bearer ${ollamaApiKey}` },
+                    }),
                 })
-                model = ollama(modelId)
+                model = ollamaProvider(modelId)
                 break
             }
 
@@ -220,6 +254,7 @@ export async function POST(req: Request) {
                 const gw = createGateway({
                     apiKey,
                     ...(baseUrl && { baseURL: baseUrl }),
+                    fetch: guardedFetch,
                 })
                 model = gw(modelId)
                 break
@@ -227,13 +262,16 @@ export async function POST(req: Request) {
 
             case "edgeone": {
                 // EdgeOne uses OpenAI-compatible API via Edge Functions
-                // Need to pass cookies for EdgeOne Pages authentication
+                // Need to pass cookies for EdgeOne Pages authentication,
+                // and the access code, which the edge function also checks
                 const cookieHeader = req.headers.get("cookie") || ""
                 const edgeone = createOpenAI({
                     apiKey: "edgeone", // EdgeOne doesn't require API key
                     baseURL: baseUrl || "/api/edgeai",
+                    fetch: guardedFetch,
                     headers: {
                         cookie: cookieHeader,
+                        "x-access-code": req.headers.get("x-access-code") || "",
                     },
                 })
                 model = edgeone.chat(modelId)
@@ -245,6 +283,7 @@ export async function POST(req: Request) {
                 const sglang = createOpenAI({
                     apiKey: apiKey || "not-needed",
                     baseURL: baseUrl || "http://127.0.0.1:8000/v1",
+                    fetch: guardedFetch,
                 })
                 model = sglang.chat(modelId)
                 break
@@ -262,18 +301,153 @@ export async function POST(req: Request) {
                     const doubao = createDeepSeek({
                         apiKey,
                         baseURL: doubaoBaseUrl,
+                        fetch: guardedFetch,
                     })
                     model = doubao(modelId)
                 } else {
                     const doubao = createOpenAI({
                         apiKey,
                         baseURL: doubaoBaseUrl,
+                        fetch: guardedFetch,
                     })
                     model = doubao.chat(modelId)
                 }
                 break
             }
 
+            case "modelscope": {
+                const baseURL =
+                    baseUrl || "https://api-inference.modelscope.cn/v1"
+                const startTime = Date.now()
+
+                try {
+                    // Initiate a streaming request (required for QwQ-32B and certain Qwen3 models)
+                    const response = await (guardedFetch ?? fetch)(
+                        `${baseURL}/chat/completions`,
+                        {
+                            method: "POST",
+                            headers: {
+                                "Content-Type": "application/json",
+                                Authorization: `Bearer ${apiKey}`,
+                            },
+                            body: JSON.stringify({
+                                model: modelId,
+                                messages: [
+                                    { role: "user", content: "Say 'OK'" },
+                                ],
+                                max_tokens: 20,
+                                stream: true,
+                                enable_thinking: false,
+                            }),
+                        },
+                    )
+
+                    if (!response.ok) {
+                        // Log the body but return only the status: the
+                        // caller chooses baseUrl, so the body may come from
+                        // any host the server can reach
+                        console.error(
+                            "[validate-model] ModelScope error body:",
+                            await response.text(),
+                        )
+                        throw new Error(
+                            `ModelScope API error (${response.status})`,
+                        )
+                    }
+
+                    const contentType =
+                        response.headers.get("content-type") || ""
+                    const isValidStreamingResponse =
+                        response.status === 200 &&
+                        (contentType.includes("text/event-stream") ||
+                            contentType.includes("application/json"))
+
+                    if (!isValidStreamingResponse) {
+                        throw new Error(
+                            `Unexpected response format: ${contentType}`,
+                        )
+                    }
+
+                    const responseTime = Date.now() - startTime
+
+                    if (response.body) {
+                        response.body.cancel().catch(() => {
+                            /* Ignore cancellation errors */
+                        })
+                    }
+
+                    return NextResponse.json({
+                        valid: true,
+                        responseTime,
+                        note: "ModelScope model validated (using streaming API)",
+                    })
+                } catch (error) {
+                    console.error(
+                        "[validate-model] ModelScope validation failed:",
+                        error,
+                    )
+                    throw error
+                }
+            }
+
+            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,
+                        fetch: guardedFetch,
+                    })
+                    model = minimax.chat(modelId)
+                } else {
+                    const minimax = createOpenAI({
+                        apiKey,
+                        baseURL: minimaxBaseUrl,
+                        fetch: guardedFetch,
+                    })
+                    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,
+                    fetch: guardedFetch,
+                })
+                model = openai.chat(modelId)
+                break
+            }
+
             default:
                 return NextResponse.json(
                     { valid: false, error: `Unknown provider: ${provider}` },

app/api/verify-access-code/route.ts

@@ -1,29 +1,9 @@
+import { checkAccessCode } from "@/lib/access-code"
+
 export async function POST(req: Request) {
-    const accessCodes =
-        process.env.ACCESS_CODE_LIST?.split(",")
-            .map((code) => code.trim())
-            .filter(Boolean) || []
-
-    // If no access codes configured, verification always passes
-    if (accessCodes.length === 0) {
-        return Response.json({
-            valid: true,
-            message: "No access code required",
-        })
-    }
-
-    const accessCodeHeader = req.headers.get("x-access-code")
-
-    if (!accessCodeHeader) {
+    if (checkAccessCode(req)) {
         return Response.json(
-            { valid: false, message: "Access code is required" },
-            { status: 401 },
-        )
-    }
-
-    if (!accessCodes.includes(accessCodeHeader)) {
-        return Response.json(
-            { valid: false, message: "Invalid access code" },
+            { valid: false, message: "Invalid or missing access code" },
             { status: 401 },
         )
     }

app/globals.css

@@ -244,6 +244,19 @@
     .scrollbar-thin::-webkit-scrollbar-thumb:hover {
         background-color: oklch(0.75 0.01 260);
     }
+
+    /* Dark mode scrollbar */
+    .dark .scrollbar-thin {
+        scrollbar-color: oklch(0.35 0.015 260) transparent;
+    }
+
+    .dark .scrollbar-thin::-webkit-scrollbar-thumb {
+        background-color: oklch(0.35 0.015 260);
+    }
+
+    .dark .scrollbar-thin::-webkit-scrollbar-thumb:hover {
+        background-color: oklch(0.45 0.015 260);
+    }
 }
 
 /* Smooth page transitions */

biome.json

@@ -1,12 +1,13 @@
 {
-    "$schema": "https://biomejs.dev/schemas/2.3.10/schema.json",
+    "$schema": "https://biomejs.dev/schemas/2.4.14/schema.json",
     "vcs": {
         "enabled": true,
         "clientKind": "git",
         "useIgnoreFile": true
     },
     "files": {
-        "ignoreUnknown": false
+        "ignoreUnknown": false,
+        "includes": ["**", "!public"]
     },
     "formatter": {
         "enabled": true,

components/ai-elements/model-selector.tsx

@@ -1,5 +1,6 @@
 import { Cloud } from "lucide-react"
-import type { ComponentProps, ReactNode } from "react"
+import type { ComponentProps, ElementRef, ReactNode } from "react"
+import { useEffect, useRef, useState } from "react"
 import {
     Command,
     CommandDialog,
@@ -69,20 +70,62 @@ export type ModelSelectorListProps = ComponentProps<typeof CommandList>
 export const ModelSelectorList = ({
     className,
     ...props
-}: 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>
-)
+}: 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>
+    )
+}
 
 export type ModelSelectorEmptyProps = ComponentProps<typeof CommandEmpty>
 
@@ -169,3 +212,27 @@ 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>
+)

components/chat-example-panel.tsx

@@ -141,9 +141,6 @@ 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}

components/chat-input.tsx

@@ -1,17 +1,28 @@
 "use client"
 
 import {
+    BookmarkPlus,
     Download,
     History,
     Image as ImageIcon,
     Link,
-    Loader2,
     Send,
+    Square,
 } from "lucide-react"
 import type React from "react"
-import { useCallback, useEffect, useRef, useState } from "react"
+import {
+    type Dispatch,
+    forwardRef,
+    type SetStateAction,
+    useCallback,
+    useEffect,
+    useImperativeHandle,
+    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"
@@ -24,15 +35,28 @@ 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
 const MAX_FILES = 5
+// Image formats every supported model provider accepts (SVG is read as text)
+const SUPPORTED_IMAGE_TYPES = [
+    "image/png",
+    "image/jpeg",
+    "image/gif",
+    "image/webp",
+]
 
 function isValidFileType(file: File): boolean {
-    return file.type.startsWith("image/") || isPdfFile(file) || isTextFile(file)
+    return (
+        SUPPORTED_IMAGE_TYPES.includes(file.type) ||
+        isPdfFile(file) ||
+        isTextFile(file)
+    )
 }
 
 function formatFileSize(bytes: number): string {
@@ -136,11 +160,16 @@ 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<
@@ -148,7 +177,7 @@ interface ChatInputProps {
         { text: string; charCount: number; isExtracting: boolean }
     >
     urlData?: Map<string, UrlData>
-    onUrlChange?: (data: Map<string, UrlData>) => void
+    onUrlChange?: Dispatch<SetStateAction<Map<string, UrlData>>>
 
     sessionId?: string
     error?: Error | null
@@ -156,98 +185,230 @@ interface ChatInputProps {
     models?: FlattenedModel[]
     selectedModelId?: string
     onModelSelect?: (modelId: string | undefined) => void
-    showUnvalidatedModels?: boolean
     onConfigureModels?: () => void
+    showUnvalidatedModels?: boolean
+    // Focus control props
+    shouldFocus?: boolean
+    onFocused?: () => void
 }
 
-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()
+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()
 
-    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
+        const textareaRef = useRef<HTMLTextAreaElement>(null)
+        const fileInputRef = useRef<HTMLInputElement>(null)
+        const [isDragging, setIsDragging] = useState(false)
 
-    const adjustTextareaHeight = useCallback(() => {
-        const textarea = textareaRef.current
-        if (textarea) {
-            textarea.style.height = "auto"
-            textarea.style.height = `${Math.min(textarea.scrollHeight, 200)}px`
+        // Expose focus method via ref
+        useImperativeHandle(ref, () => ({
+            focus: () => {
+                textareaRef.current?.focus()
+            },
+        }))
+
+        // Focus the textarea when shouldFocus becomes true
+        // Use setTimeout to ensure focus happens after drawio iframe settles
+        useEffect(() => {
+            if (shouldFocus) {
+                const timer = setTimeout(() => {
+                    textareaRef.current?.focus()
+                    onFocused?.()
+                }, 150)
+                return () => clearTimeout(timer)
+            }
+        }, [shouldFocus, onFocused])
+
+        const [showHistory, setShowHistory] = useState(false)
+        const [showUrlDialog, setShowUrlDialog] = useState(false)
+        const [showSaveAsTemplate, setShowSaveAsTemplate] = useState(false)
+        const [isExtractingUrl, setIsExtractingUrl] = useState(false)
+        const [sendShortcut, setSendShortcut] = useState("ctrl-enter")
+        // Allow retry when there's an error (even if status is still "streaming" or "submitted")
+        const isDisabled =
+            (status === "streaming" || status === "submitted") && !error
+        // Block sending until attached files and URLs have their text, otherwise
+        // their content would be silently dropped
+        const isExtractingAttachments =
+            files.some((file) => pdfData.get(file)?.isExtracting) ||
+            Array.from(urlData?.values() ?? []).some((d) => d.isExtracting)
+
+        const adjustTextareaHeight = useCallback(() => {
+            const textarea = textareaRef.current
+            if (textarea) {
+                textarea.style.height = "auto"
+                textarea.style.height = `${Math.min(textarea.scrollHeight, 200)}px`
+            }
+        }, [])
+        // Handle programmatic input changes (e.g., setInput("") after form submission)
+        useEffect(() => {
+            adjustTextareaHeight()
+        }, [input, adjustTextareaHeight])
+
+        // 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,
+                )
+        }, [])
+
+        const handleChange = (e: React.ChangeEvent<HTMLTextAreaElement>) => {
+            onChange(e)
+            adjustTextareaHeight()
         }
-    }, [])
-    // Handle programmatic input changes (e.g., setInput("") after form submission)
-    useEffect(() => {
-        adjustTextareaHeight()
-    }, [input, adjustTextareaHeight])
 
-    const handleChange = (e: React.ChangeEvent<HTMLTextAreaElement>) => {
-        onChange(e)
-        adjustTextareaHeight()
-    }
+        const handleKeyDown = (e: React.KeyboardEvent) => {
+            // Enter that confirms an IME candidate must not send the message
+            if (e.nativeEvent.isComposing || e.keyCode === 229) return
 
-    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()
+            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 &&
+                    !isExtractingAttachments
+                ) {
+                    form.requestSubmit()
+                }
             }
         }
-    }
 
-    const handlePaste = async (e: React.ClipboardEvent) => {
-        if (isDisabled) return
+        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/"),
-        )
+            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}.${file.type.split("/")[1]}`,
-                            { type: file.type },
-                        )
-                    }),
+            if (imageItems.length > 0) {
+                const imageFiles = (
+                    await Promise.all(
+                        imageItems.map(async (item, index) => {
+                            const file = item.getAsFile()
+                            if (!file) return null
+                            return new File(
+                                [file],
+                                `pasted-image-${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,
                 )
-            ).filter((f): f is File => f !== null)
+                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(
-                imageFiles,
+                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
+
+            // Let validateFiles show a toast for unsupported types
+            const { validFiles, errors } = validateFiles(
+                Array.from(e.dataTransfer.files),
                 files.length,
                 dict,
             )
@@ -256,272 +417,254 @@ export function ChatInput({
                 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])
+        const handleUrlExtract = async (url: string) => {
+            if (!onUrlChange) return
+
+            setIsExtractingUrl(true)
+
+            // Use functional updates so a removal or send made while extracting
+            // is not overwritten when the request finishes
+            try {
+                onUrlChange((prev) =>
+                    new Map(prev).set(url, {
+                        url,
+                        title: url,
+                        content: "",
+                        charCount: 0,
+                        isExtracting: true,
+                    }),
+                )
+
+                const data = await extractUrlContent(url)
+
+                // Skip if the URL was removed while extracting
+                onUrlChange((prev) =>
+                    prev.has(url) ? new Map(prev).set(url, data) : prev,
+                )
+
+                setShowUrlDialog(false)
+            } catch (error) {
+                // Remove the URL from the data map on error
+                onUrlChange((prev) => {
+                    const next = new Map(prev)
+                    next.delete(url)
+                    return next
+                })
+                showErrorToast(
+                    <span className="text-muted-foreground">
+                        {error instanceof Error
+                            ? error.message
+                            : "Failed to extract URL content"}
+                    </span>,
+                )
+            } finally {
+                setIsExtractingUrl(false)
+            }
         }
 
-        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) {
-            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
-                        }
+        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) =>
+                                          onUrlChange((prev) => {
+                                              const next = new Map(prev)
+                                              next.delete(url)
+                                              return 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>
-            )}
-            <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"
-                />
 
-                <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 && (
+                    <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={() => setShowUrlDialog(true)}
-                                disabled={isDisabled}
-                                tooltipContent={dict.chat.ExtractURL}
+                                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"
                             >
-                                <Link className="h-4 w-4" />
+                                <History 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
+                            <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/png,image/jpeg,image/gif,image/webp,.svg,.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>
-                    <ModelSelector
-                        models={models}
-                        selectedModelId={selectedModelId}
-                        onSelect={onModelSelect}
-                        onConfigure={onConfigureModels}
-                        disabled={isDisabled}
-                        showUnvalidatedModels={showUnvalidatedModels}
-                    />
-                    <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" />
+                        <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>
                         ) : (
-                            <>
+                            <Button
+                                type="submit"
+                                disabled={
+                                    isDisabled ||
+                                    isExtractingAttachments ||
+                                    !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>
                         )}
-                    </Button>
+                    </div>
                 </div>
-            </div>
-            <HistoryDialog
-                showHistory={showHistory}
-                onToggleHistory={setShowHistory}
-            />
-            <SaveDialog
-                open={showSaveDialog}
-                onOpenChange={setShowSaveDialog}
-                onSave={(filename, format) =>
-                    saveDiagramToFile(
-                        filename,
-                        format,
-                        sessionId,
-                        dict.save.savedSuccessfully,
-                    )
-                }
-                defaultFilename={`diagram-${new Date()
-                    .toISOString()
-                    .slice(0, 10)}`}
-            />
-            {onUrlChange && (
-                <UrlInputDialog
-                    open={showUrlDialog}
-                    onOpenChange={setShowUrlDialog}
-                    onSubmit={handleUrlExtract}
-                    isExtracting={isExtractingUrl}
+                <HistoryDialog
+                    showHistory={showHistory}
+                    onToggleHistory={setShowHistory}
                 />
-            )}
-        </form>
-    )
-}
+                <SaveDialog
+                    open={showSaveDialog}
+                    onOpenChange={setShowSaveDialog}
+                    onSave={(filename, format) =>
+                        saveDiagramToFile(
+                            filename,
+                            format,
+                            sessionId,
+                            dict.save.savedSuccessfully,
+                        )
+                    }
+                    defaultFilename={`diagram-${new Date()
+                        .toISOString()
+                        .slice(0, 10)}`}
+                />
+                {onUrlChange && (
+                    <UrlInputDialog
+                        open={showUrlDialog}
+                        onOpenChange={setShowUrlDialog}
+                        onSubmit={handleUrlExtract}
+                        isExtracting={isExtractingUrl}
+                    />
+                )}
+                <TemplateCreateDialog
+                    open={showSaveAsTemplate}
+                    onOpenChange={setShowSaveAsTemplate}
+                    onSuccess={() => {
+                        setShowSaveAsTemplate(false)
+                        // Let the template list in the lobby reload
+                        window.dispatchEvent(new Event("templatesChanged"))
+                    }}
+                    initialPrompt={input.trim()}
+                />
+            </form>
+        )
+    },
+)

components/chat-message-display.tsx

@@ -3,19 +3,20 @@
 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"
@@ -26,8 +27,12 @@ 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"
@@ -57,20 +62,20 @@ function getCompleteOperations(
 
 import { useDiagram } from "@/contexts/diagram-context"
 
-// Helper to split text content into regular text and file sections (PDF or text files)
+// Helper to split text content into regular text and file/URL sections (PDF, text files, or URLs)
 interface TextSection {
-    type: "text" | "file"
+    type: "text" | "file" | "url"
     content: string
     filename?: string
     charCount?: number
-    fileType?: "pdf" | "text"
+    fileType?: "pdf" | "text" | "url"
 }
 
 function splitTextIntoFileSections(text: string): TextSection[] {
     const sections: TextSection[] = []
-    // Match [PDF: filename] or [File: filename] patterns
+    // Match [PDF: filename], [File: filename], or [URL: url] patterns
     const filePattern =
-        /\[(PDF|File):\s*([^\]]+)\]\n([\s\S]*?)(?=\n\n\[(PDF|File):|$)/g
+        /\[(PDF|File|URL):\s*([^\]]+)\]\n([\s\S]*?)(?=\n\n\[(PDF|File|URL):|$)/g
     let lastIndex = 0
     let match
 
@@ -81,28 +86,34 @@ function splitTextIntoFileSections(text: string): TextSection[] {
             sections.push({ type: "text", content: beforeText })
         }
 
-        // Add file section
-        const fileType = match[1].toLowerCase() === "pdf" ? "pdf" : "text"
+        // Add file/url section
+        const sectionType = match[1].toLowerCase()
+        const fileType =
+            sectionType === "pdf"
+                ? "pdf"
+                : sectionType === "url"
+                  ? "url"
+                  : "text"
         const filename = match[2].trim()
-        const fileContent = match[3].trim()
+        const content = match[3].trim()
         sections.push({
-            type: "file",
-            content: fileContent,
+            type: sectionType === "url" ? "url" : "file",
+            content: content,
             filename,
-            charCount: fileContent.length,
+            charCount: content.length,
             fileType,
         })
 
         lastIndex = match.index + match[0].length
     }
 
-    // Add remaining text after last file section
+    // Add remaining text after last section
     const remainingText = text.slice(lastIndex).trim()
     if (remainingText) {
         sections.push({ type: "text", content: remainingText })
     }
 
-    // If no file sections found, return original text
+    // If no file/url sections found, return original text
     if (sections.length === 0) {
         sections.push({ type: "text", content: text })
     }
@@ -118,12 +129,14 @@ const getMessageTextContent = (message: UIMessage): string => {
         .join("\n")
 }
 
+// Matches the [PDF: ...], [File: ...] and [URL: ...] sections appended to the user's text
+export const APPENDED_FILE_SECTIONS_PATTERN =
+    /\n\n\[(PDF|File|URL):\s*[^\]]+\]\n[\s\S]*$/
+
 // Get only the user's original text, excluding appended file content
 const getUserOriginalText = (message: UIMessage): string => {
     const fullText = getMessageTextContent(message)
-    // Strip out [PDF: ...] and [File: ...] sections that were appended
-    const filePattern = /\n\n\[(PDF|File):\s*[^\]]+\]\n[\s\S]*$/
-    return fullText.replace(filePattern, "").trim()
+    return fullText.replace(APPENDED_FILE_SECTIONS_PATTERN, "").trim()
 }
 
 interface SessionMetadata {
@@ -148,6 +161,12 @@ 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({
@@ -165,6 +184,10 @@ export function ChatMessageDisplay({
     onSelectSession,
     onDeleteSession,
     loadedMessageIdsRef,
+    validationStates = {},
+    onImproveWithSuggestions,
+    onSendTemplate,
+    currentInput = "",
 }: ChatMessageDisplayProps) {
     const dict = useDictionary()
     const { chartXML, loadDiagram: onDisplayChart } = useDiagram()
@@ -224,6 +247,10 @@ 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,
@@ -392,6 +419,7 @@ 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) {
@@ -405,8 +433,17 @@ export function ChatMessageDisplay({
                 return
             }
 
-            // Single message added - smooth scroll
-            messagesEndRef.current.scrollIntoView({ behavior: "smooth" })
+            // 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)
+            }
         }
     }, [messages])
 
@@ -423,19 +460,30 @@ export function ChatMessageDisplay({
             messages.length > 0 ? [messages[messages.length - 1]] : []
 
         messagesToProcess.forEach((message) => {
+            // Messages restored from a saved session were applied before it was
+            // saved; the saved diagram is authoritative, so don't replay them
+            const isRestoredMessage =
+                loadedMessageIdsRef?.current.has(message.id) ?? false
+
             if (message.parts) {
                 message.parts.forEach((part) => {
                     if (part.type?.startsWith("tool-")) {
                         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) => ({
-                                ...prev,
-                                [toolCallId]: false,
-                            }))
+                            setExpandedTools((prev) => {
+                                // Only auto-collapse if not already set (user hasn't interacted)
+                                if (prev[toolCallId] === undefined) {
+                                    return { ...prev, [toolCallId]: false }
+                                }
+                                return prev
+                            })
                         }
 
+                        if (isRestoredMessage) return
+
                         if (
                             part.type === "tool-display_diagram" &&
                             input?.xml
@@ -502,6 +550,32 @@ export function ChatMessageDisplay({
                             part.type === "tool-edit_diagram" &&
                             input?.operations
                         ) {
+                            // Failed or stopped: drop the queued preview. If the original
+                            // XML is still stored, the tool handler never ran (user pressed
+                            // stop), so undo the streamed preview here.
+                            if (state === "output-error") {
+                                if (
+                                    pendingEditRef.current?.toolCallId ===
+                                        toolCallId &&
+                                    editDebounceTimeoutRef.current
+                                ) {
+                                    clearTimeout(editDebounceTimeoutRef.current)
+                                    editDebounceTimeoutRef.current = null
+                                    pendingEditRef.current = null
+                                }
+                                const originalXml =
+                                    editDiagramOriginalXmlRef.current.get(
+                                        toolCallId,
+                                    )
+                                if (originalXml) {
+                                    editDiagramOriginalXmlRef.current.delete(
+                                        toolCallId,
+                                    )
+                                    onDisplayChart(originalXml, true)
+                                }
+                                return
+                            }
+
                             const completeOps = getCompleteOperations(
                                 input.operations as DiagramOperation[],
                             )
@@ -571,9 +645,10 @@ export function ChatMessageDisplay({
                                                         origXml,
                                                         pending.operations,
                                                     )
-                                                    handleDisplayChart(
+                                                    // Load the full document so other pages stay intact
+                                                    onDisplayChart(
                                                         editedXml,
-                                                        false,
+                                                        true,
                                                     )
                                                     lastProcessedXmlRef.current.set(
                                                         pending.toolCallId +
@@ -633,6 +708,8 @@ export function ChatMessageDisplay({
                     onDeleteSession={onDeleteSession}
                     setInput={setInput}
                     setFiles={setFiles}
+                    onSendTemplate={onSendTemplate}
+                    currentInput={currentInput}
                     dict={dict}
                 />
             ) : messages.length === 0 ? null : (
@@ -730,8 +807,42 @@ 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" &&
@@ -911,30 +1022,56 @@ 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 (
-                                                            <ToolCallCard
+                                                            <div
                                                                 key={`${message.id}-tool-${group.startIndex}`}
-                                                                part={
-                                                                    group
-                                                                        .parts[0] as ToolPartLike
-                                                                }
-                                                                expandedTools={
-                                                                    expandedTools
-                                                                }
-                                                                setExpandedTools={
-                                                                    setExpandedTools
-                                                                }
-                                                                onCopy={
-                                                                    copyMessageToClipboard
-                                                                }
-                                                                copiedToolCallId={
-                                                                    copiedToolCallId
-                                                                }
-                                                                copyFailedToolCallId={
-                                                                    copyFailedToolCallId
-                                                                }
-                                                                dict={dict}
-                                                            />
+                                                            >
+                                                                <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>
                                                         )
                                                     }
 
@@ -1048,12 +1185,14 @@ export function ChatMessageDisplay({
                                                                                     ) => {
                                                                                         if (
                                                                                             section.type ===
-                                                                                            "file"
+                                                                                                "file" ||
+                                                                                            section.type ===
+                                                                                                "url"
                                                                                         ) {
-                                                                                            const pdfKey = `${message.id}-file-${partIndex}-${sectionIndex}`
+                                                                                            const sectionKey = `${message.id}-${section.type}-${partIndex}-${sectionIndex}`
                                                                                             const isExpanded =
                                                                                                 expandedPdfSections[
-                                                                                                    pdfKey
+                                                                                                    sectionKey
                                                                                                 ] ??
                                                                                                 false
                                                                                             const charDisplay =
@@ -1062,10 +1201,27 @@ export function ChatMessageDisplay({
                                                                                                     1000
                                                                                                     ? `${(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={
-                                                                                                        pdfKey
+                                                                                                        sectionKey
                                                                                                     }
                                                                                                     className="rounded-lg border border-border/60 bg-muted/30 overflow-hidden"
                                                                                                 >
@@ -1080,7 +1236,7 @@ export function ChatMessageDisplay({
                                                                                                                     prev,
                                                                                                                 ) => ({
                                                                                                                     ...prev,
-                                                                                                                    [pdfKey]:
+                                                                                                                    [sectionKey]:
                                                                                                                         !isExpanded,
                                                                                                                 }),
                                                                                                             )
@@ -1088,13 +1244,10 @@ 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">
-                                                                                                            {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">
+                                                                                                            <Icon
+                                                                                                                className={`h-4 w-4 ${iconColor}`}
+                                                                                                            />
+                                                                                                            <span className="text-xs font-medium truncate max-w-[200px]">
                                                                                                                 {
                                                                                                                     section.filename
                                                                                                                 }
@@ -1114,7 +1267,7 @@ export function ChatMessageDisplay({
                                                                                                         )}
                                                                                                     </button>
                                                                                                     {isExpanded && (
-                                                                                                        <div className="px-3 py-2 border-t border-border/40 max-h-48 overflow-y-auto bg-muted/30">
+                                                                                                        <div className="px-3 py-2 border-t border-border/40 max-h-48 overflow-y-auto bg-muted/30 scrollbar-thin">
                                                                                                             <pre className="text-xs whitespace-pre-wrap text-foreground/80">
                                                                                                                 {
                                                                                                                     section.content

components/chat-panel.tsx

@@ -8,8 +8,7 @@ import {
     PanelRightOpen,
     Settings,
 } from "lucide-react"
-import Image from "next/image"
-import { useRouter, useSearchParams } from "next/navigation"
+import { usePathname, useRouter, useSearchParams } from "next/navigation"
 import type React from "react"
 import {
     useCallback,
@@ -22,6 +21,7 @@ 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"
@@ -29,16 +29,24 @@ 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 { isMinimalDiagram } from "@/lib/chat-helpers"
+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 { ChatMessageDisplay } from "./chat-message-display"
+import { cn, formatXML, isRealDiagram, wrapWithMxFile } from "@/lib/utils"
+import type { ValidationState } from "./chat/ValidationCard"
+import {
+    APPENDED_FILE_SECTIONS_PATTERN,
+    ChatMessageDisplay,
+} from "./chat-message-display"
 import { DevXmlSimulator } from "./dev-xml-simulator"
 
 // localStorage keys for persistence
@@ -65,18 +73,18 @@ interface ChatMessage {
 interface ChatPanelProps {
     isVisible: boolean
     onToggleVisibility: () => void
-    drawioUi: "min" | "sketch"
-    onToggleDrawioUi: () => void
+    drawioUi: DrawioTheme
+    onDrawioUiChange: (theme: DrawioTheme) => 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"
-const MAX_AUTO_RETRY_COUNT = 1
+// Increased to 3 to support VLM validation retries (matches MAX_VALIDATION_RETRIES)
+const MAX_AUTO_RETRY_COUNT = 3
 
 const MAX_CONTINUATION_RETRY_COUNT = 2 // Limit for truncation continuation retries
 
@@ -103,15 +111,26 @@ function hasToolErrors(messages: ChatMessage[]): boolean {
     return lastToolPart?.state === TOOL_ERROR_STATE
 }
 
+/**
+ * Snapshots keep the full multi-page document, but the model only sees and
+ * edits the first page, so give it the first page's mxGraphModel.
+ * Older snapshots already hold a single mxGraphModel and are returned as is.
+ */
+function getFirstPageXml(xml: string): string {
+    if (!xml.includes("<mxfile")) return xml
+    const doc = new DOMParser().parseFromString(xml, "text/xml")
+    const model = doc.querySelector("diagram")?.querySelector("mxGraphModel")
+    return model ? formatXML(new XMLSerializer().serializeToString(model)) : xml
+}
+
 export default function ChatPanel({
     isVisible,
     onToggleVisibility,
     drawioUi,
-    onToggleDrawioUi,
+    onDrawioUiChange,
     darkMode,
     onToggleDarkMode,
     isMobile = false,
-    onCloseProtectionChange,
 }: ChatPanelProps) {
     const {
         loadDiagram: onDisplayChart,
@@ -122,38 +141,36 @@ 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) => {
-                if (resolverRef && "current" in resolverRef) {
-                    resolverRef.current = resolve
-                }
+                resolverRef.current = resolve
                 if (saveToHistory) {
                     onExport()
                 } else {
                     handleExportWithoutHistory()
                 }
             }),
-            new Promise<string>((_, reject) =>
-                setTimeout(
-                    () =>
-                        reject(
-                            new Error(
-                                "Chart export timed out after 10 seconds",
-                            ),
-                        ),
-                    10000,
-                ),
-            ),
+            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)
+            }),
         ])
     }
 
@@ -175,6 +192,10 @@ 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 [maxOutputTokens, setMaxOutputTokens] = useState("")
+    const [shouldFocusInput, setShouldFocusInput] = useState(false)
 
     // Restore input from sessionStorage on mount (when ChatPanel remounts due to key change)
     useEffect(() => {
@@ -184,6 +205,30 @@ 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)
+        }
+    }, [])
+
+    // Load output token budget from localStorage on mount
+    useEffect(() => {
+        const stored = localStorage.getItem(STORAGE_KEYS.maxOutputTokens)
+        if (stored !== null) {
+            setMaxOutputTokens(stored)
+        }
+    }, [])
+
     // Check config on mount
     useEffect(() => {
         fetch(getApiEndpoint("/api/config"))
@@ -271,161 +316,213 @@ 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)
+    }, [])
+
+    // Handler for output token budget change (empty string = use server default)
+    const handleMaxOutputTokensChange = useCallback((value: string) => {
+        const digitsOnly = value.replace(/\D/g, "")
+        setMaxOutputTokens(digitsOnly)
+        localStorage.setItem(STORAGE_KEYS.maxOutputTokens, digitsOnly)
+    }, [])
+
+    // Failed VLM validations in the current user turn (reset on user action)
+    const validationRetryCountRef = useRef(0)
+
+    // VLM validation hook using AI SDK's useObject
+    const { validateWithFallback } = useValidateDiagram()
+
     // Diagram tool handlers (display_diagram, edit_diagram, append_diagram)
     const { handleToolCall } = useDiagramToolHandlers({
         partialXmlRef,
         editDiagramOriginalXmlRef,
+        validationRetryCountRef,
         chartXMLRef,
         onDisplayChart,
         onFetchChart,
         onExport,
+        captureValidationPng,
+        validateDiagram: validateWithFallback,
+        enableVlmValidation: vlmValidationEnabled,
+        sessionId,
+        onValidationStateChange: handleValidationStateChange,
     })
 
-    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
+    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)
+                    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 (error.message.includes("Daily token limit")) {
-                    quotaManager.showTokenLimitToast()
-                    return
+            // 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 (
-                    error.message.includes("Rate limit exceeded") ||
-                    error.message.includes("tokens per minute")
+                    continuationRetryCountRef.current >=
+                    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
+                    toast.error(
+                        formatMessage(dict.errors.continuationRetryLimit, {
+                            max: MAX_CONTINUATION_RETRY_COUNT,
+                        }),
+                    )
                     continuationRetryCountRef.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++
+                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++
+            }
 
-                return true
-            },
-        })
+            return true
+        },
+    })
 
     // Ref to track latest messages for unload persistence
     const messagesRef = useRef(messages)
@@ -435,6 +532,9 @@ export default function ChatPanel({
 
     // Track last synced session ID to detect external changes (e.g., URL back/forward)
     const lastSyncedSessionIdRef = useRef<string | null>(null)
+    // Messages array from our latest save. A session holding this exact array was
+    // created by our own save, so it must not be treated as an external switch.
+    const lastSavedMessagesRef = useRef<unknown[] | null>(null)
 
     // Helper: Sync UI state with session data (eliminates duplication)
     // Track message IDs that are being loaded from session (to skip animations/scroll)
@@ -501,8 +601,10 @@ export default function ChatPanel({
                     thumbnailDataUrl = latestSvgRef.current
                 }
             }
+            const messages = sanitizeMessages(messagesRef.current)
+            lastSavedMessagesRef.current = messages
             return {
-                messages: sanitizeMessages(messagesRef.current),
+                messages,
                 xmlSnapshots: Array.from(xmlSnapshotsRef.current.entries()),
                 diagramXml: currentDiagramXml,
                 thumbnailDataUrl,
@@ -522,7 +624,7 @@ export default function ChatPanel({
 
         try {
             const currentSession = sessionManager.currentSession
-            if (currentSession && currentSession.messages.length > 0) {
+            if (currentSession) {
                 // Restore from session manager (IndexedDB)
                 justLoadedSessionRef.current = true
                 syncUIWithSession(currentSession)
@@ -555,11 +657,16 @@ export default function ChatPanel({
         // Skip if session ID hasn't changed (our own saves don't change the ID)
         if (newSessionId === lastSyncedSessionIdRef.current) return
 
+        // Our own save created this session; the UI already shows its content
+        const isOwnNewSession =
+            newSession?.messages === lastSavedMessagesRef.current
+
         // Update last synced ID
         lastSyncedSessionIdRef.current = newSessionId
+        if (isOwnNewSession) return
 
         // Sync UI with new session
-        if (newSession && newSession.messages.length > 0) {
+        if (newSession) {
             justLoadedSessionRef.current = true
             syncUIWithSession(newSession)
         } else if (!newSession) {
@@ -614,7 +721,7 @@ export default function ChatPanel({
         // Debounce: save after 1 second of no changes
         localStorageDebounceRef.current = setTimeout(async () => {
             try {
-                if (messages.length > 0) {
+                if (messages.length > 0 || hasDiagramNow) {
                     const sessionData = await buildSessionData({
                         // Only capture thumbnail if there was a diagram AND this isn't a no-diagram session
                         withThumbnail: hasDiagramNow && !isNodiagramSession,
@@ -636,6 +743,7 @@ export default function ChatPanel({
             }
         }
     }, [
+        chartXML,
         messages,
         status,
         sessionIsAvailable,
@@ -666,7 +774,8 @@ export default function ChatPanel({
         const handleVisibilityChange = async () => {
             if (
                 document.visibilityState === "hidden" &&
-                messagesRef.current.length > 0
+                (messagesRef.current.length > 0 ||
+                    isRealDiagram(chartXMLRef.current))
             ) {
                 try {
                     // Attempt to save session - browser may not wait for completion
@@ -695,12 +804,23 @@ export default function ChatPanel({
     const onFormSubmit = async (e: React.FormEvent<HTMLFormElement>) => {
         e.preventDefault()
         const isProcessing = status === "streaming" || status === "submitted"
-        if (input.trim() && !isProcessing) {
-            // Check if input matches a cached example (only when no messages yet)
-            if (messages.length === 0) {
+        // Attachments still extracting have no text yet. Template sends call
+        // requestSubmit() and skip the disabled send button, so check here too.
+        const isExtracting =
+            files.some((f) => pdfData.get(f)?.isExtracting) ||
+            Array.from(urlData.values()).some((d) => d.isExtracting)
+        if (input.trim() && !isProcessing && !isExtracting) {
+            // Check if input matches a cached example (only when no messages
+            // yet and the canvas is empty, same rule as the server)
+            if (
+                messages.length === 0 &&
+                isMinimalDiagram(chartXMLRef.current || "")
+            ) {
+                // Pass the file name so a user's own file never matches an example
                 const cached = findCachedResponse(
                     input.trim(),
                     files.length > 0,
+                    files.length === 1 ? files[0].name : undefined,
                 )
                 if (cached) {
                     // Add user message and fake assistant response to messages
@@ -736,6 +856,11 @@ export default function ChatPanel({
                             ],
                         },
                     ] as any)
+                    // Snapshot the canvas before the example so editing this message works
+                    xmlSnapshotsRef.current.set(
+                        0,
+                        chartXMLRef.current || wrapWithMxFile(""),
+                    )
                     setInput("")
                     sessionStorage.removeItem(SESSION_STORAGE_INPUT_KEY)
                     setFiles([])
@@ -745,13 +870,6 @@ export default function ChatPanel({
             }
 
             try {
-                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[] = []
@@ -766,20 +884,7 @@ export default function ChatPanel({
                 // Add the combined text as the first part
                 parts.unshift({ type: "text", text: userText })
 
-                // Get previous XML from the last snapshot (before this message)
-                const snapshotKeys = Array.from(
-                    xmlSnapshotsRef.current.keys(),
-                ).sort((a, b) => b - a)
-                const previousXml =
-                    snapshotKeys.length > 0
-                        ? xmlSnapshotsRef.current.get(snapshotKeys[0]) || ""
-                        : ""
-
-                // Save XML snapshot for this message (will be at index = current messages.length)
-                const messageIndex = messages.length
-                xmlSnapshotsRef.current.set(messageIndex, chartXml)
-
-                sendChatMessage(parts, chartXml, previousXml, sessionId)
+                await sendWithCurrentDiagram(parts)
 
                 // Token count is tracked in onFinish with actual server usage
                 setInput("")
@@ -788,10 +893,37 @@ export default function ChatPanel({
                 setUrlData(new Map())
             } catch (error) {
                 console.error("Error fetching chart data:", error)
+                toast.error(dict.errors.failedToExport)
             }
         }
     }
 
+    // Export the current diagram, snapshot it for this message, and send
+    const sendWithCurrentDiagram = async (parts: any[]) => {
+        const chartXml = formatXML(await onFetchChart())
+        const previousXml = getPreviousXml(messages.length)
+
+        // Snapshot the full multi-page document (kept fresh by autosave) so
+        // regenerate/edit can restore every page; the model gets page 1 only
+        xmlSnapshotsRef.current.set(
+            messages.length,
+            chartXMLRef.current || chartXml,
+        )
+
+        sendChatMessage(parts, chartXml, previousXml, sessionId)
+    }
+
+    // Send VLM validation feedback as a new user message through the normal send path
+    const handleImproveWithSuggestions = async (feedback: string) => {
+        if (status === "streaming" || status === "submitted") return
+        try {
+            await sendWithCurrentDiagram([{ type: "text", text: feedback }])
+        } catch (error) {
+            console.error("Error fetching chart data:", error)
+            toast.error(dict.errors.failedToExport)
+        }
+    }
+
     // Handle session switching from history dropdown
     const handleSelectSession = useCallback(
         async (sessionId: string) => {
@@ -821,6 +953,7 @@ export default function ChatPanel({
                 } else {
                     justLoadedSessionIdRef.current = null
                 }
+                setValidationStates({}) // Clear validation states when switching sessions
                 syncUIWithSession(sessionData)
                 router.replace(`?session=${sessionId}`, { scroll: false })
             }
@@ -837,10 +970,10 @@ export default function ChatPanel({
             if (result.wasCurrentSession) {
                 // Deleted current session - clear UI and URL
                 syncUIWithSession(null)
-                router.replace(window.location.pathname, { scroll: false })
+                router.replace(pathname, { scroll: false })
             }
         },
-        [sessionManager, syncUIWithSession, router],
+        [sessionManager, syncUIWithSession, router, pathname],
     )
 
     const handleNewChat = useCallback(async () => {
@@ -858,8 +991,10 @@ 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()
@@ -871,7 +1006,10 @@ export default function ChatPanel({
         toast.success(dict.dialogs.clearSuccess)
 
         // Clear URL param to show blank state
-        router.replace(window.location.pathname, { scroll: false })
+        router.replace(pathname, { scroll: false })
+
+        // After starting a fresh chat, move focus back to the chat input
+        setShouldFocusInput(true)
     }, [
         clearDiagram,
         handleFileChange,
@@ -883,8 +1021,27 @@ 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 }) => {
+            // Keep attachments: they are sent along with the template prompt
+            flushSync(() => {
+                setInput(template.prompt)
+            })
+
+            const formElement = document.getElementById(
+                "chat-form",
+            ) as HTMLFormElement | null
+            if (formElement) {
+                formElement.requestSubmit()
+            }
+        },
+        [setInput],
+    )
+
     const handleInputChange = (
         e: React.ChangeEvent<HTMLInputElement | HTMLTextAreaElement>,
     ) => {
@@ -897,13 +1054,15 @@ export default function ChatPanel({
     }
 
     // Helper functions for message actions (regenerate/edit)
-    // Extract previous XML snapshot before a given message index
+    // Extract previous XML snapshot (first page, as sent to the model) before a given message index
     const getPreviousXml = (beforeIndex: number): string => {
         const snapshotKeys = Array.from(xmlSnapshotsRef.current.keys())
             .filter((k) => k < beforeIndex)
             .sort((a, b) => b - a)
         return snapshotKeys.length > 0
-            ? xmlSnapshotsRef.current.get(snapshotKeys[0]) || ""
+            ? getFirstPageXml(
+                  xmlSnapshotsRef.current.get(snapshotKeys[0]) || "",
+              )
             : ""
     }
 
@@ -922,6 +1081,29 @@ 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,
@@ -932,6 +1114,7 @@ export default function ChatPanel({
         // Reset all retry/continuation state on user-initiated message
         autoRetryCountRef.current = 0
         continuationRetryCountRef.current = 0
+        validationRetryCountRef.current = 0
         partialXmlRef.current = ""
 
         const config = getSelectedAIConfig()
@@ -939,7 +1122,7 @@ export default function ChatPanel({
         sendMessage(
             { parts },
             {
-                body: { xml, previousXml, sessionId },
+                body: { xml, previousXml, sessionId, customSystemMessage },
                 headers: {
                     "x-access-code": config.accessCode,
                     ...(config.aiProvider && {
@@ -965,10 +1148,21 @@ 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",
                     }),
+                    ...(maxOutputTokens && {
+                        "x-max-output-tokens": maxOutputTokens,
+                    }),
                 },
             },
         )
@@ -1069,7 +1263,12 @@ export default function ChatPanel({
         })
 
         // Now send the message after state is guaranteed to be updated
-        sendChatMessage(userParts, savedXml, previousXml, sessionId)
+        sendChatMessage(
+            userParts,
+            getFirstPageXml(savedXml),
+            previousXml,
+            sessionId,
+        )
     }
 
     const handleEditMessage = async (messageIndex: number, newText: string) => {
@@ -1096,10 +1295,13 @@ export default function ChatPanel({
         // Clean up snapshots for messages after the user message (they will be removed)
         cleanupSnapshotsAfter(messageIndex)
 
-        // Create new parts with updated text
+        // Create new parts with updated text. The edit box only shows the typed
+        // text, so keep the appended PDF/file/URL content
         const newParts = message.parts?.map((part: any) => {
             if (part.type === "text") {
-                return { ...part, text: newText }
+                const appended =
+                    part.text.match(APPENDED_FILE_SECTIONS_PATTERN)?.[0] ?? ""
+                return { ...part, text: newText + appended }
             }
             return part
         }) || [{ type: "text", text: newText }]
@@ -1112,7 +1314,12 @@ export default function ChatPanel({
         })
 
         // Now send the edited message after state is guaranteed to be updated
-        sendChatMessage(newParts, savedXml, previousXml, sessionId)
+        sendChatMessage(
+            newParts,
+            getFirstPageXml(savedXml),
+            previousXml,
+            sessionId,
+        )
     }
 
     // Collapsed view (desktop only)
@@ -1255,6 +1462,10 @@ export default function ChatPanel({
                     onSelectSession={handleSelectSession}
                     onDeleteSession={handleDeleteSession}
                     loadedMessageIdsRef={loadedMessageIdsRef}
+                    validationStates={validationStates}
+                    onImproveWithSuggestions={handleImproveWithSuggestions}
+                    onSendTemplate={handleSendTemplate}
+                    currentInput={input}
                 />
             </main>
 
@@ -1278,6 +1489,7 @@ export default function ChatPanel({
                     status={status}
                     onSubmit={onFormSubmit}
                     onChange={handleInputChange}
+                    onStop={handleStop}
                     files={files}
                     onFileChange={handleFileChange}
                     pdfData={pdfData}
@@ -1288,21 +1500,29 @@ export default function ChatPanel({
                     models={modelConfig.models}
                     selectedModelId={modelConfig.selectedModelId}
                     onModelSelect={modelConfig.setSelectedModelId}
-                    showUnvalidatedModels={modelConfig.showUnvalidatedModels}
                     onConfigureModels={() => setShowModelConfigDialog(true)}
+                    showUnvalidatedModels={modelConfig.showUnvalidatedModels}
+                    shouldFocus={shouldFocusInput}
+                    onFocused={() => setShouldFocusInput(false)}
                 />
             </footer>
 
             <SettingsDialog
                 open={showSettingsDialog}
                 onOpenChange={setShowSettingsDialog}
-                onCloseProtectionChange={onCloseProtectionChange}
                 drawioUi={drawioUi}
-                onToggleDrawioUi={onToggleDrawioUi}
+                onDrawioUiChange={onDrawioUiChange}
                 darkMode={darkMode}
                 onToggleDarkMode={onToggleDarkMode}
                 minimalStyle={minimalStyle}
                 onMinimalStyleChange={setMinimalStyle}
+                vlmValidationEnabled={vlmValidationEnabled}
+                onVlmValidationChange={handleVlmValidationChange}
+                customSystemMessage={customSystemMessage}
+                onCustomSystemMessageChange={handleCustomSystemMessageChange}
+                maxOutputTokens={maxOutputTokens}
+                onMaxOutputTokensChange={handleMaxOutputTokensChange}
+                onOpenModelConfig={() => setShowModelConfigDialog(true)}
             />
 
             <ModelConfigDialog

components/chat/ChatLobby.tsx

@@ -8,9 +8,10 @@ import {
     Trash2,
     X,
 } from "lucide-react"
-import Image from "next/image"
-import { useState } from "react"
+import { useEffect, useState } from "react"
+import { TemplatePanel } from "@/components/chat/TemplatePanel"
 import ExamplePanel from "@/components/chat-example-panel"
+import Image from "@/components/image-with-basepath"
 import {
     AlertDialog,
     AlertDialogAction,
@@ -21,6 +22,8 @@ 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
@@ -35,6 +38,8 @@ interface ChatLobbyProps {
     onDeleteSession?: (id: string) => void
     setInput: (input: string) => void
     setFiles: (files: File[]) => void
+    onSendTemplate?: (template: Template) => void
+    currentInput?: string
     dict: {
         sessionHistory?: {
             recentChats?: string
@@ -44,6 +49,10 @@ interface ChatLobbyProps {
             deleteTitle?: string
             deleteDescription?: string
         }
+        templates?: {
+            title?: string
+            myTemplates?: string
+        }
         examples?: {
             quickExamples?: string
         }
@@ -75,164 +84,241 @@ 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) {
-    // Track whether examples section is expanded (collapsed by default when there's history)
-    const [examplesExpanded, setExamplesExpanded] = useState(false)
-    // Delete confirmation dialog state
+    const [templatesExpanded, setTemplatesExpanded] = useState(true)
+    const [examplesExpanded, setExamplesExpanded] = useState(true)
+    const [panelVisibility, setPanelVisibility] = useState(getPanelVisibility)
     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) {
-        // Show full examples when no history
-        return <ExamplePanel setInput={setInput} setFiles={setFiles} />
+        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 history + collapsible examples when there are sessions
     return (
         <div className="py-6 px-2 animate-fade-in">
             {/* Recent Chats Section */}
-            <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
+            {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) => {
+                                        // Ignore keys bubbling up from the delete button
+                                        if (e.target !== e.currentTarget) return
+                                        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()),
-                        )
-                        .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
-                        />
+                        ).length === 0 &&
+                            searchQuery && (
+                                <p className="text-sm text-muted-foreground text-center py-4">
+                                    {dict.sessionHistory?.noResults ||
+                                        "No chats found"}
+                                </p>
+                            )}
                     </div>
-                )}
-            </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>
+            )}
 
             {/* Delete Confirmation Dialog */}
             <AlertDialog

components/chat/TemplateCreateDialog.tsx

@@ -0,0 +1,206 @@
+"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()
+        // React submit events bubble through the portal; keep them away from
+        // the chat form this dialog may be rendered in
+        e.stopPropagation()
+
+        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>
+    )
+}

components/chat/TemplateEditDialog.tsx

@@ -0,0 +1,218 @@
+"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 each time the dialog opens, dropping any cancelled edits
+    useEffect(() => {
+        if (open && template) {
+            setTitle(template.title || "")
+            setDescription(template.description || "")
+            setPrompt(template.prompt || "")
+            setPinned(template.pinned || false)
+            setError(null)
+        }
+    }, [open, template])
+
+    const handleOpenChange = (newOpen: boolean) => {
+        if (!newOpen) {
+            setError(null)
+        }
+        onOpenChange(newOpen)
+    }
+
+    const handleSubmit = async (e: React.FormEvent) => {
+        e.preventDefault()
+        // React submit events bubble through the portal; keep them away from
+        // any form this dialog may be rendered in
+        e.stopPropagation()
+
+        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>
+    )
+}

components/chat/TemplatePanel.tsx

@@ -0,0 +1,646 @@
+"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()
+        // Reload when a template is saved elsewhere, e.g. from the chat input
+        window.addEventListener("templatesChanged", loadTemplates)
+        return () =>
+            window.removeEventListener("templatesChanged", 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 = ""
+            }
+        }
+    }
+
+    // Shared by the empty state and the list, so import works in both
+    const importInput = (
+        <input
+            ref={fileInputRef}
+            type="file"
+            accept="application/json,.json"
+            onChange={handleImport}
+            className="hidden"
+        />
+    )
+    const importMessageBox = 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>
+    )
+
+    // 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>
+                    <button
+                        type="button"
+                        onClick={() => fileInputRef.current?.click()}
+                        className="mt-2 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"
+                    >
+                        <Upload className="w-3.5 h-3.5" />
+                        {dict.templates.importTemplates}
+                    </button>
+                    {importInput}
+                    {importMessageBox && (
+                        <div className="mt-3">{importMessageBox}</div>
+                    )}
+
+                    <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>
+                    {importInput}
+                </div>
+
+                {/* Import message */}
+                {importMessageBox}
+
+                <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) => {
+                                        // Ignore keys bubbling up from the action buttons
+                                        if (e.target !== e.currentTarget) return
+                                        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>
+    )
+}

components/chat/ToolCallCard.tsx

@@ -66,9 +66,9 @@ export function ToolCallCard({
     dict,
 }: ToolCallCardProps) {
     const callId = part.toolCallId
-    const { state, input, output } = part
-    // Default to collapsed if tool is complete, expanded if still streaming
-    const isExpanded = expandedTools[callId] ?? state !== "output-available"
+    const { state, input, output, errorText } = part
+    // Default to expanded for all states (user can manually collapse if needed)
+    const isExpanded = expandedTools[callId] ?? true
     const toolName = part.type?.replace("tool-", "")
     const isCopied = copiedToolCallId === callId
 
@@ -92,6 +92,14 @@ export function ToolCallCard({
         }
     }
 
+    // Incomplete XML means the output hit the length limit, unless the user
+    // stopped the generation themselves
+    const isTruncated =
+        state === "output-error" &&
+        errorText !== "Stopped by user" &&
+        (toolName === "display_diagram" || toolName === "append_diagram") &&
+        !isMxCellXmlComplete(input?.xml)
+
     const handleCopy = () => {
         let textToCopy = ""
 
@@ -161,22 +169,15 @@ export function ToolCallCard({
                         </>
                     )}
                     {state === "output-error" &&
-                        (() => {
-                            // Check if this is a truncation (incomplete XML) vs real error
-                            const isTruncated =
-                                (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">
-                                    Truncated
-                                </span>
-                            ) : (
-                                <span className="text-xs font-medium text-red-600 bg-red-50 px-2 py-0.5 rounded-full">
-                                    Error
-                                </span>
-                            )
-                        })()}
+                        (isTruncated ? (
+                            <span className="text-xs font-medium text-yellow-600 bg-yellow-50 px-2 py-0.5 rounded-full">
+                                Truncated
+                            </span>
+                        ) : (
+                            <span className="text-xs font-medium text-red-600 bg-red-50 px-2 py-0.5 rounded-full">
+                                Error
+                            </span>
+                        ))}
                     {input && Object.keys(input).length > 0 && (
                         <button
                             type="button"
@@ -195,7 +196,22 @@ export function ToolCallCard({
             {input && isExpanded && (
                 <div className="px-4 py-3 border-t border-border/40 bg-muted/20">
                     {typeof input === "object" && input.xml ? (
-                        <CodeBlock code={input.xml} language="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" />
+                        )
                     ) : typeof input === "object" &&
                       input.operations &&
                       Array.isArray(input.operations) ? (
@@ -209,23 +225,16 @@ export function ToolCallCard({
                     ) : null}
                 </div>
             )}
-            {output &&
-                state === "output-error" &&
-                (() => {
-                    const isTruncated =
-                        (toolName === "display_diagram" ||
-                            toolName === "append_diagram") &&
-                        !isMxCellXmlComplete(input?.xml)
-                    return (
-                        <div
-                            className={`px-4 py-3 border-t border-border/40 text-sm ${isTruncated ? "text-yellow-600" : "text-red-600"}`}
-                        >
-                            {isTruncated
-                                ? "Output truncated due to length limits. Try a simpler request or increase the maxOutputLength."
-                                : output}
-                        </div>
-                    )
-                })()}
+            {/* AI SDK stores tool errors in errorText */}
+            {state === "output-error" && (errorText || output) && (
+                <div
+                    className={`px-4 py-3 border-t border-border/40 text-sm whitespace-pre-wrap break-words ${isTruncated ? "text-yellow-600" : "text-red-600"}`}
+                >
+                    {isTruncated
+                        ? "Output truncated due to length limits. Try a simpler request or increase Max Output Tokens in Settings."
+                        : (errorText ?? output)}
+                </div>
+            )}
             {/* Show get_shape_library output on success */}
             {output &&
                 toolName === "get_shape_library" &&

components/chat/ValidationCard.tsx

@@ -0,0 +1,328 @@
+"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>
+    )
+}

components/chat/types.ts

@@ -13,4 +13,5 @@ export interface ToolPartLike {
         operations?: DiagramOperation[]
     } & Record<string, unknown>
     output?: string
+    errorText?: string
 }

components/file-preview-list.tsx

@@ -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"
 

components/history-dialog.tsx

@@ -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,
@@ -43,7 +43,7 @@ export function HistoryDialog({
 
     return (
         <Dialog open={showHistory} onOpenChange={onToggleHistory}>
-            <DialogContent className="max-w-3xl max-h-[80vh] overflow-y-auto">
+            <DialogContent className="max-w-3xl max-h-[80vh] overflow-y-auto scrollbar-thin">
                 <DialogHeader>
                     <DialogTitle>{dict.history.title}</DialogTitle>
                     <DialogDescription>

components/image-with-basepath.tsx

@@ -0,0 +1,16 @@
+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} />
+    },
+)

components/model-selector.tsx

@@ -5,8 +5,10 @@ import {
     Bot,
     Check,
     ChevronDown,
+    Monitor,
     Server,
     Settings2,
+    User,
 } from "lucide-react"
 import { useEffect, useMemo, useRef, useState } from "react"
 import {
@@ -19,39 +21,27 @@ 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 } from "@/lib/types/model-config"
+import {
+    type FlattenedModel,
+    PROVIDER_LOGO_MAP,
+} 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",
-}
-
 // Group models by providerLabel (handles duplicate providers)
 function groupModelsByProvider(
     models: FlattenedModel[],
@@ -61,7 +51,11 @@ function groupModelsByProvider(
         { provider: string; models: FlattenedModel[] }
     >()
     for (const model of models) {
-        const key = model.providerLabel
+        // For server models, strip "Server · " prefix for cleaner grouping
+        const key =
+            model.source === "server"
+                ? model.providerLabel.replace(/^Server · /, "")
+                : model.providerLabel
         const existing = groups.get(key)
         if (existing) {
             existing.models.push(model)
@@ -89,10 +83,26 @@ export function ModelSelector({
         }
         return models.filter((m) => m.validated === true)
     }, [models, showUnvalidatedModels])
-    const groupedModels = useMemo(
-        () => groupModelsByProvider(displayModels),
+
+    // Separate server and user models
+    const serverModels = useMemo(
+        () => displayModels.filter((m) => m.source === "server"),
         [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(
@@ -101,9 +111,7 @@ export function ModelSelector({
     )
 
     const handleSelect = (value: string) => {
-        if (value === "__configure__") {
-            onConfigure()
-        } else if (value === "__server_default__") {
+        if (value === "__server_default__") {
             onSelect(undefined)
         } else {
             onSelect(value)
@@ -150,7 +158,7 @@ export function ModelSelector({
     }, [])
 
     return (
-        <div ref={wrapperRef} className="inline-block">
+        <div ref={wrapperRef} className="min-w-0 max-w-48">
             <ModelSelectorRoot open={open} onOpenChange={setOpen}>
                 <ModelSelectorTrigger asChild>
                     <ButtonWithTooltip
@@ -159,7 +167,7 @@ export function ModelSelector({
                         size="sm"
                         disabled={disabled}
                         className={cn(
-                            "hover:bg-accent gap-1.5 h-8 px-2 transition-all duration-150 ease-in-out",
+                            "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",
                             !showLabel && "px-1.5 justify-center",
                         )}
                         // accessibility: expose label to screen readers
@@ -168,7 +176,7 @@ 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="text-xs truncate">
+                            <span className="min-w-0 truncate text-xs">
                                 {selectedModel
                                     ? selectedModel.modelId
                                     : dict.modelConfig.default}
@@ -189,113 +197,247 @@ export function ModelSelector({
                     <ModelSelectorInput
                         placeholder={dict.modelConfig.searchModels}
                     />
-                    <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>
+                    <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>
 
-                        {/* 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) => (
+                                {/* Server Default Option - only show when no server models are configured */}
+                                {serverModels.length === 0 && (
+                                    <ModelSelectorGroup
+                                        heading={dict.modelConfig.default}
+                                    >
                                         <ModelSelectorItem
-                                            key={model.id}
-                                            value={model.modelId}
-                                            onSelect={() =>
-                                                handleSelect(model.id)
-                                            }
-                                            className="cursor-pointer"
+                                            value="__server_default__"
+                                            onSelect={handleSelect}
+                                            className={cn(
+                                                "cursor-pointer",
+                                                !selectedModelId && "bg-accent",
+                                            )}
                                         >
                                             <Check
                                                 className={cn(
                                                     "mr-2 h-4 w-4",
-                                                    selectedModelId === model.id
+                                                    !selectedModelId
                                                         ? "opacity-100"
                                                         : "opacity-0",
                                                 )}
                                             />
-                                            <ModelSelectorLogo
-                                                provider={
-                                                    PROVIDER_LOGO_MAP[
-                                                        provider
-                                                    ] || provider
-                                                }
-                                                className="mr-2"
-                                            />
+                                            <Server className="mr-2 h-4 w-4 text-muted-foreground" />
                                             <ModelSelectorName>
-                                                {model.modelId}
+                                                {dict.modelConfig.serverDefault}
                                             </ModelSelectorName>
-                                            {model.validated !== true && (
-                                                <span
-                                                    title={
-                                                        dict.modelConfig
-                                                            .unvalidatedModelWarning
-                                                    }
-                                                >
-                                                    <AlertTriangle className="ml-auto h-3 w-3 text-warning" />
-                                                </span>
-                                            )}
                                         </ModelSelectorItem>
-                                    ))}
-                                </ModelSelectorGroup>
-                            ),
-                        )}
+                                    </ModelSelectorGroup>
+                                )}
 
-                        {/* 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}
+                                {/* 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}
+                                                                // Unique value so same-named models highlight
+                                                                // separately; keywords keep search by name
+                                                                value={model.id}
+                                                                keywords={[
+                                                                    model.modelId,
+                                                                    providerLabel,
+                                                                ]}
+                                                                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.id}
+                                                                keywords={[
+                                                                    model.modelId,
+                                                                    providerLabel,
+                                                                ]}
+                                                                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>
                         </div>
-                    </ModelSelectorList>
+                        {/* 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>
                 </ModelSelectorContent>
             </ModelSelectorRoot>
         </div>

components/provider-credentials-fields.tsx

@@ -0,0 +1,264 @@
+"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>
+    )
+}

components/provider-logo.tsx

@@ -0,0 +1,36 @@
+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}
+        />
+    )
+}

components/quota-limit-toast.tsx

@@ -23,9 +23,22 @@ 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()
@@ -71,19 +84,24 @@ export function QuotaLimitToast({
             </div>
             {/* Message */}
             <div className="text-sm text-muted-foreground leading-relaxed mb-4 space-y-2">
-                <p>
-                    {isTokenLimit
-                        ? dict.quota.messageToken
-                        : dict.quota.messageApi}
-                </p>
+                <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
                     dangerouslySetInnerHTML={{
-                        __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",
-                        }),
+                        __html: tipHtml,
                     }}
                 />
-                <p dangerouslySetInnerHTML={{ __html: dict.quota.tip }} />
                 <p>{dict.quota.reset}</p>
             </div>{" "}
             {/* Action buttons */}
@@ -101,24 +119,28 @@ export function QuotaLimitToast({
                         {dict.quota.configModel}
                     </button>
                 )}
-                <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>
+                {!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>
+                    </>
+                )}
             </div>
         </div>
     )

components/save-dialog.tsx

@@ -20,7 +20,7 @@ import {
 } from "@/components/ui/select"
 import { useDictionary } from "@/hooks/use-dictionary"
 
-export type ExportFormat = "drawio" | "png" | "svg"
+export type ExportFormat = "drawio" | "png" | "svg" | "xmlsvg"
 
 interface SaveDialogProps {
     open: boolean
@@ -74,6 +74,11 @@ 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)

components/settings-dialog.tsx

@@ -1,8 +1,9 @@
 "use client"
 
-import { Github, Info, Moon, Sun, Tag } from "lucide-react"
+import { ChevronRight, Github, Info, Moon, Sun, Tag } from "lucide-react"
 import { usePathname, useRouter, useSearchParams } from "next/navigation"
-import { Suspense, useEffect, useState } from "react"
+import { Suspense, useCallback, useEffect, useState } from "react"
+import { toast } from "sonner"
 import { Button } from "@/components/ui/button"
 import {
     Dialog,
@@ -21,9 +22,12 @@ 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({
@@ -54,22 +58,28 @@ 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
-    onCloseProtectionChange?: (enabled: boolean) => void
-    drawioUi: "min" | "sketch"
-    onToggleDrawioUi: () => void
+    drawioUi: DrawioTheme
+    onDrawioUiChange: (theme: DrawioTheme) => 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
+    maxOutputTokens?: string
+    onMaxOutputTokensChange?: (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 {
@@ -82,30 +92,58 @@ function getStoredAccessCodeRequired(): boolean | null {
 function SettingsContent({
     open,
     onOpenChange,
-    onCloseProtectionChange,
     drawioUi,
-    onToggleDrawioUi,
+    onDrawioUiChange,
     darkMode,
     onToggleDarkMode,
     minimalStyle = false,
     onMinimalStyleChange = () => {},
+    vlmValidationEnabled = false,
+    onVlmValidationChange = () => {},
+    onOpenModelConfig,
+    customSystemMessage = "",
+    onCustomSystemMessageChange = () => {},
+    maxOutputTokens = "",
+    onMaxOutputTokensChange = () => {},
 }: 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("")
+    const [httpsProxy, setHttpsProxy] = useState("")
+    const [isApplyingProxy, setIsApplyingProxy] = useState(false)
 
     useEffect(() => {
-        // Only fetch if not cached in localStorage
-        if (getStoredAccessCodeRequired() !== null) return
+        // 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
 
         fetch(getApiEndpoint("/api/config"))
             .then((res) => {
@@ -121,10 +159,9 @@ function SettingsContent({
                 setAccessCodeRequired(required)
             })
             .catch(() => {
-                // Don't cache on error - allow retry on next mount
-                setAccessCodeRequired(false)
+                // Keep existing cached value on error
             })
-    }, [])
+    }, [open])
 
     // Detect current language from pathname
     useEffect(() => {
@@ -143,13 +180,31 @@ function SettingsContent({
                 localStorage.getItem(STORAGE_ACCESS_CODE_KEY) || ""
             setAccessCode(storedCode)
 
-            const storedCloseProtection = localStorage.getItem(
-                STORAGE_CLOSE_PROTECTION_KEY,
+            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",
             )
-            // Default to true if not set
-            setCloseProtection(storedCloseProtection !== "false")
 
             setError("")
+
+            // Load proxy settings (Electron only)
+            if (window.electronAPI?.getProxy) {
+                window.electronAPI.getProxy().then((config) => {
+                    setHttpProxy(config.httpProxy || "")
+                    setHttpsProxy(config.httpsProxy || "")
+                })
+            }
         }
     }, [open])
 
@@ -157,6 +212,13 @@ 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
@@ -208,8 +270,48 @@ function SettingsContent({
         }
     }
 
+    const handleApplyProxy = async () => {
+        if (!window.electronAPI?.setProxy) return
+
+        // Validate proxy URLs (must start with http:// or https://)
+        const validateProxyUrl = (url: string): boolean => {
+            if (!url) return true // Empty is OK
+            return url.startsWith("http://") || url.startsWith("https://")
+        }
+
+        const trimmedHttp = httpProxy.trim()
+        const trimmedHttps = httpsProxy.trim()
+
+        if (trimmedHttp && !validateProxyUrl(trimmedHttp)) {
+            toast.error("HTTP Proxy must start with http:// or https://")
+            return
+        }
+        if (trimmedHttps && !validateProxyUrl(trimmedHttps)) {
+            toast.error("HTTPS Proxy must start with http:// or https://")
+            return
+        }
+
+        setIsApplyingProxy(true)
+        try {
+            const result = await window.electronAPI.setProxy({
+                httpProxy: trimmedHttp || undefined,
+                httpsProxy: trimmedHttps || undefined,
+            })
+
+            if (result.success) {
+                toast.success(dict.settings.proxyApplied)
+            } else {
+                toast.error(result.error || "Failed to apply proxy settings")
+            }
+        } catch {
+            toast.error("Failed to apply proxy settings")
+        } finally {
+            setIsApplyingProxy(false)
+        }
+    }
+
     return (
-        <DialogContent className="sm:max-w-lg p-0 gap-0">
+        <DialogContent className="sm:max-w-lg p-0 gap-0 max-h-[90vh] flex flex-col overflow-hidden">
             {/* Header */}
             <DialogHeader className="px-6 pt-6 pb-4">
                 <DialogTitle>{dict.settings.title}</DialogTitle>
@@ -219,8 +321,29 @@ function SettingsContent({
             </DialogHeader>
 
             {/* Content */}
-            <div className="px-6 pb-6">
+            <div className="px-6 pb-6 overflow-y-auto flex-1 scrollbar-thin">
                 <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">
@@ -314,42 +437,40 @@ function SettingsContent({
                     {/* Draw.io Style */}
                     <SettingItem
                         label={dict.settings.drawioStyle}
-                        description={`${dict.settings.drawioStyleDescription} ${
-                            drawioUi === "min"
-                                ? dict.settings.minimal
-                                : dict.settings.sketch
-                        }`}
+                        description={dict.settings.drawioStyleDescription}
                     >
-                        <Button
-                            id="drawio-ui"
-                            variant="outline"
-                            onClick={onToggleDrawioUi}
-                            className="h-9 w-[120px] rounded-xl border-border-subtle hover:bg-interactive-hover font-normal"
+                        <Select
+                            value={drawioUi}
+                            onValueChange={(v) =>
+                                onDrawioUiChange(v as DrawioTheme)
+                            }
                         >
-                            {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)
-                            }}
-                        />
+                            <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>
                     </SettingItem>
 
                     {/* Diagram Style */}
@@ -370,6 +491,212 @@ function SettingsContent({
                             </span>
                         </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>
+
+                    {/* Max Output Tokens */}
+                    <SettingItem
+                        label={dict.settings.maxOutputTokens}
+                        description={dict.settings.maxOutputTokensDescription}
+                    >
+                        <Input
+                            id="max-output-tokens"
+                            type="text"
+                            inputMode="numeric"
+                            value={maxOutputTokens}
+                            onChange={(e) =>
+                                onMaxOutputTokensChange(e.target.value)
+                            }
+                            placeholder="64000"
+                            className="h-9 w-28 text-sm"
+                        />
+                    </SettingItem>
+
+                    {/* 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 && (
+                            <div className="py-4 space-y-3">
+                                <div className="space-y-0.5">
+                                    <Label className="text-sm font-medium">
+                                        {dict.settings.proxy}
+                                    </Label>
+                                    <p className="text-xs text-muted-foreground">
+                                        {dict.settings.proxyDescription}
+                                    </p>
+                                </div>
+
+                                <div className="space-y-2">
+                                    <Input
+                                        id="http-proxy"
+                                        type="text"
+                                        value={httpProxy}
+                                        onChange={(e) =>
+                                            setHttpProxy(e.target.value)
+                                        }
+                                        placeholder={`${dict.settings.httpProxy}: http://proxy:8080`}
+                                        className="h-9"
+                                    />
+                                    <Input
+                                        id="https-proxy"
+                                        type="text"
+                                        value={httpsProxy}
+                                        onChange={(e) =>
+                                            setHttpsProxy(e.target.value)
+                                        }
+                                        placeholder={`${dict.settings.httpsProxy}: http://proxy:8080`}
+                                        className="h-9"
+                                    />
+                                </div>
+
+                                <Button
+                                    onClick={handleApplyProxy}
+                                    disabled={isApplyingProxy}
+                                    className="h-9 px-4 rounded-xl w-full"
+                                >
+                                    {isApplyingProxy
+                                        ? "..."
+                                        : dict.settings.applyProxy}
+                                </Button>
+                            </div>
+                        )}
                 </div>
             </div>
 

components/ui/card.tsx

@@ -1,92 +0,0 @@
-import * as React from "react"
-
-import { cn } from "@/lib/utils"
-
-function Card({ className, ...props }: React.ComponentProps<"div">) {
-  return (
-    <div
-      data-slot="card"
-      className={cn(
-        "bg-card text-card-foreground flex flex-col gap-6 rounded-xl border py-6 shadow-sm",
-        className
-      )}
-      {...props}
-    />
-  )
-}
-
-function CardHeader({ className, ...props }: React.ComponentProps<"div">) {
-  return (
-    <div
-      data-slot="card-header"
-      className={cn(
-        "@container/card-header grid auto-rows-min grid-rows-[auto_auto] items-start gap-1.5 px-6 has-[data-slot=card-action]:grid-cols-[1fr_auto] [.border-b]:pb-6",
-        className
-      )}
-      {...props}
-    />
-  )
-}
-
-function CardTitle({ className, ...props }: React.ComponentProps<"div">) {
-  return (
-    <div
-      data-slot="card-title"
-      className={cn("leading-none font-semibold", className)}
-      {...props}
-    />
-  )
-}
-
-function CardDescription({ className, ...props }: React.ComponentProps<"div">) {
-  return (
-    <div
-      data-slot="card-description"
-      className={cn("text-muted-foreground text-sm", className)}
-      {...props}
-    />
-  )
-}
-
-function CardAction({ className, ...props }: React.ComponentProps<"div">) {
-  return (
-    <div
-      data-slot="card-action"
-      className={cn(
-        "col-start-2 row-span-2 row-start-1 self-start justify-self-end",
-        className
-      )}
-      {...props}
-    />
-  )
-}
-
-function CardContent({ className, ...props }: React.ComponentProps<"div">) {
-  return (
-    <div
-      data-slot="card-content"
-      className={cn("px-6", className)}
-      {...props}
-    />
-  )
-}
-
-function CardFooter({ className, ...props }: React.ComponentProps<"div">) {
-  return (
-    <div
-      data-slot="card-footer"
-      className={cn("flex items-center px-6 [.border-t]:pt-6", className)}
-      {...props}
-    />
-  )
-}
-
-export {
-  Card,
-  CardHeader,
-  CardFooter,
-  CardTitle,
-  CardAction,
-  CardDescription,
-  CardContent,
-}

components/ui/command.tsx

@@ -77,12 +77,13 @@ function CommandInput({
   )
 }
 
-function CommandList({
-  className,
-  ...props
-}: React.ComponentProps<typeof CommandPrimitive.List>) {
+const CommandList = React.forwardRef<
+  React.ElementRef<typeof CommandPrimitive.List>,
+  React.ComponentPropsWithoutRef<typeof CommandPrimitive.List>
+>(({ className, ...props }, ref) => {
   return (
     <CommandPrimitive.List
+      ref={ref}
       data-slot="command-list"
       className={cn(
         "max-h-[300px] scroll-py-1 overflow-x-hidden overflow-y-auto",
@@ -91,7 +92,8 @@ function CommandList({
       {...props}
     />
   )
-}
+})
+CommandList.displayName = CommandPrimitive.List.displayName ?? "CommandList"
 
 function CommandEmpty({
   ...props

components/url-input-dialog.tsx

@@ -35,14 +35,14 @@ export function UrlInputDialog({
         setError("")
 
         if (!url.trim()) {
-            setError("Please enter a URL")
+            setError(dict.url.enterUrl)
             return
         }
 
         try {
             new URL(url)
         } catch {
-            setError("Invalid URL format")
+            setError(dict.url.invalidFormat)
             return
         }
 

contexts/diagram-context.tsx

@@ -1,8 +1,8 @@
 "use client"
 
 import type React from "react"
-import { createContext, useContext, useEffect, useRef, useState } from "react"
-import type { DrawIoEmbedRef } from "react-drawio"
+import { createContext, useContext, useRef, useState } from "react"
+import type { DrawIoEmbedRef, EventExport } from "react-drawio"
 import { toast } from "sonner"
 import type { ExportFormat } from "@/components/save-dialog"
 import { getApiEndpoint } from "@/lib/base-path"
@@ -20,9 +20,10 @@ interface DiagramContextType {
     loadDiagram: (chart: string, skipValidation?: boolean) => string | null
     handleExport: () => void
     handleExportWithoutHistory: () => void
-    resolverRef: React.Ref<((value: string) => void) | null>
-    drawioRef: React.Ref<DrawIoEmbedRef | null>
-    handleDiagramExport: (data: any) => void
+    resolverRef: React.MutableRefObject<((value: string) => void) | null>
+    drawioRef: React.MutableRefObject<DrawIoEmbedRef | null>
+    handleDiagramExport: (data: EventExport) => void
+    handleDiagramAutoSave: (data: { xml?: string }) => void
     clearDiagram: () => void
     saveDiagramToFile: (
         filename: string,
@@ -31,6 +32,7 @@ interface DiagramContextType {
         successMessage?: string,
     ) => void
     getThumbnailSvg: () => Promise<string | null>
+    captureValidationPng: () => Promise<string | null>
     isDrawioReady: boolean
     onDrawioLoad: () => void
     resetDrawioReady: () => void
@@ -40,6 +42,12 @@ interface DiagramContextType {
 
 const DiagramContext = createContext<DiagramContextType | undefined>(undefined)
 
+// Exports for thumbnails, validation PNGs and file saves carry a tag in the
+// request's `message` field. draw.io echoes the request back in the export
+// event, so each result reaches its own caller; untagged exports (chat-panel's
+// onFetchChart) resolve resolverRef.
+type ExportTag = "thumbnail" | "validation"
+
 export function DiagramProvider({ children }: { children: React.ReactNode }) {
     const [chartXML, setChartXML] = useState<string>("")
     const [latestSvg, setLatestSvg] = useState<string>("")
@@ -51,10 +59,12 @@ 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)
+    // Pending thumbnail and validation PNG exports, keyed by their export tag
+    const taggedResolversRef = useRef<
+        Partial<Record<ExportTag, (value: string) => void>>
+    >({})
     // 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>("")
 
@@ -63,6 +73,10 @@ 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 = () => {
@@ -70,32 +84,16 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
         setIsDrawioReady(false)
     }
 
-    // Keep chartXMLRef in sync with state for restoration after remount
-    useEffect(() => {
-        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])
+    // Update chartXML and its ref together, so callbacks that read the ref
+    // (export handler, autosave) see the new value right away
+    const updateChartXML = (xml: string) => {
+        chartXMLRef.current = xml
+        setChartXML(xml)
+    }
 
     // Track if we're expecting an export for file save (stores raw export data)
     const saveResolverRef = useRef<{
-        resolver: ((data: string) => void) | null
+        resolver: ((data: string, fullDiagramXML?: string) => void) | null
         format: ExportFormat | null
     }>({ resolver: null, format: null })
 
@@ -118,33 +116,52 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
         }
     }
 
+    // Export with a tag in `message` (draw.io echoes it back in the export
+    // event) and wait for that result. Resolves to null on timeout, which is
+    // expected occasionally.
+    const requestTaggedExport = (
+        tag: ExportTag,
+        format: "xmlsvg" | "png",
+        timeoutMs: number,
+    ) =>
+        new Promise<string | null>((resolve) => {
+            const finish = (value: string | null) => {
+                clearTimeout(timer)
+                if (taggedResolversRef.current[tag] === finish) {
+                    delete taggedResolversRef.current[tag]
+                }
+                resolve(value)
+            }
+            const timer = setTimeout(() => finish(null), timeoutMs)
+            taggedResolversRef.current[tag] = finish
+            drawioRef.current?.exportDiagram({ format, message: tag })
+        })
+
     // Get current diagram as SVG for thumbnail (used by session storage)
     const getThumbnailSvg = async (): Promise<string | null> => {
         if (!drawioRef.current) return null
         // Don't export if diagram is empty
-        if (!isRealDiagram(chartXML)) return null
-
-        try {
-            const svgData = await Promise.race([
-                new Promise<string>((resolve) => {
-                    resolverRef.current = resolve
-                    drawioRef.current?.exportDiagram({ format: "xmlsvg" })
-                }),
-                new Promise<string>((_, reject) =>
-                    setTimeout(() => reject(new Error("Export timeout")), 3000),
-                ),
-            ])
+        if (!isRealDiagram(chartXMLRef.current)) return null
 
+        // xmlsvg exports return an SVG data URL
+        const svgData = await requestTaggedExport("thumbnail", "xmlsvg", 3000)
+        if (svgData?.startsWith("data:image/svg")) {
             // Update latestSvg so it's available for future saves
-            if (svgData?.includes("<svg")) {
-                setLatestSvg(svgData)
-                return svgData
-            }
-            return null
-        } catch {
-            // Timeout is expected occasionally - don't log as error
-            return null
+            setLatestSvg(svgData)
+            return svgData
         }
+        return null
+    }
+
+    // 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(chartXMLRef.current)) return null
+
+        const pngData = await requestTaggedExport("validation", "png", 5000)
+        // PNG data should be a base64 data URL
+        return pngData?.startsWith("data:image/png") ? pngData : null
     }
 
     const loadDiagram = (
@@ -174,7 +191,7 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
         }
 
         // Keep chartXML in sync even when diagrams are injected (e.g., display_diagram tool)
-        setChartXML(xmlToLoad)
+        updateChartXML(xmlToLoad)
 
         if (drawioRef.current) {
             drawioRef.current.load({
@@ -185,33 +202,40 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
         return null
     }
 
-    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)
+    const handleDiagramExport = (data: EventExport) => {
+        // Tagged exports (thumbnail, validation PNG, file save) go only to
+        // their own caller, so they never take the result meant for resolverRef
+        const tag = data.message?.message
+        if (tag === "thumbnail" || tag === "validation") {
+            taggedResolversRef.current[tag]?.(data.data)
+            return
+        }
+        if (tag === "save") {
+            saveResolverRef.current.resolver?.(data.data, data.xml)
             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
-            if (format === "png" || format === "svg") {
-                return
-            }
+            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
         // Limit to 20 entries to prevent memory leaks during long sessions
         const MAX_HISTORY_SIZE = 20
         if (expectHistoryExportRef.current) {
+            // Store the full multi-page document (extractedXML is only the
+            // first page), so restoring a version keeps every page
+            const historyXml = chartXMLRef.current || extractedXML
             setDiagramHistory((prev) => {
                 const newHistory = [
                     ...prev,
                     {
                         svg: data.data,
-                        xml: extractedXML,
+                        xml: historyXml,
                     },
                 ]
                 // Keep only the last MAX_HISTORY_SIZE entries (circular buffer)
@@ -226,6 +250,18 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
         }
     }
 
+    // react-drawio registers this callback once per iframe mount, so it must
+    // read refs: state captured in its closure would stay stale after a remount
+    const handleDiagramAutoSave = (data: { xml?: string }) => {
+        if (!data?.xml) return
+        // Don't overwrite a pending restore - if we have a real diagram but
+        // DrawIO hasn't loaded yet, it means we're waiting to restore
+        if (!hasCalledOnLoadRef.current && isRealDiagram(chartXMLRef.current)) {
+            return
+        }
+        updateChartXML(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)
@@ -246,18 +282,21 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
         }
 
         // Map format to draw.io export format
-        const drawioFormat = format === "drawio" ? "xmlsvg" : format
+        const drawioFormat =
+            format === "drawio" || format === "xmlsvg" ? "xmlsvg" : format
 
         // Set up the resolver before triggering export
         saveResolverRef.current = {
-            resolver: (exportData: string) => {
+            resolver: (exportData: string, fullDiagramXML?: string) => {
                 let fileContent: string | Blob
                 let mimeType: string
                 let extension: string
 
                 if (format === "drawio") {
-                    // Extract XML from SVG for .drawio format
-                    const xml = extractDiagramXML(exportData)
+                    // Prefer the complete document from the export event so all pages are saved.
+                    const xml = fullDiagramXML?.trim()
+                        ? fullDiagramXML
+                        : extractDiagramXML(exportData)
                     let xmlContent = xml
                     if (!xml.includes("<mxfile")) {
                         xmlContent = `<mxfile><diagram name="Page-1" id="page-1">${xml}</diagram></mxfile>`
@@ -270,8 +309,13 @@ 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
+                    // SVG format (view-only)
                     fileContent = exportData
                     mimeType = "image/svg+xml"
                     extension = ".svg"
@@ -317,7 +361,10 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
         }
 
         // Export diagram - callback will be handled in handleDiagramExport
-        drawioRef.current.exportDiagram({ format: drawioFormat })
+        drawioRef.current.exportDiagram({
+            format: drawioFormat,
+            message: "save",
+        })
     }
 
     // Log save event to Langfuse (just flags the trace, doesn't send content)
@@ -350,9 +397,11 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
                 resolverRef,
                 drawioRef,
                 handleDiagramExport,
+                handleDiagramAutoSave,
                 clearDiagram,
                 saveDiagramToFile,
                 getThumbnailSvg,
+                captureValidationPng,
                 isDrawioReady,
                 onDrawioLoad,
                 resetDrawioReady,

docker-compose.yml

@@ -11,6 +11,9 @@ 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

docs/cn/FAQ.md

@@ -0,0 +1,78 @@
+# 常见问题解答 (FAQ)
+
+---
+
+## 1. 无法导出 PDF
+
+**问题**: Web 版点击导出 PDF 后跳转到 `convert.diagrams.net/node/export` 然后无响应
+
+**原因**: 嵌入式 Draw.io 不支持直接 PDF 导出，依赖外部转换服务，在 iframe 中无法正常工作
+
+**解决方案**: 先导出为图片（PNG），再打印转成 PDF
+
+**相关 Issue**: #539, #125
+
+---
+
+## 2. 无法访问 embed.diagrams.net（离线/内网部署）
+
+**问题**: 内网环境提示"找不到 embed.diagrams.net 的服务器 IP 地址"
+
+**关键点**: `NEXT_PUBLIC_*` 环境变量是**构建时**变量，会被打包到 JS 代码中，**运行时设置无效**！
+
+**解决方案**: 必须在构建时通过 `args` 传入：
+
+```yaml
+# docker-compose.yml
+services:
+  drawio:
+    image: jgraph/drawio:latest
+    ports: ["8080:8080"]
+  next-ai-draw-io:
+    build:
+      context: .
+      args:
+        - NEXT_PUBLIC_DRAWIO_BASE_URL=http://你的服务器IP:8080/
+    ports: ["3000:3000"]
+    env_file: .env
+```
+
+**内网用户**: 在外网修改 Dockerfile 并构建镜像，再传到内网使用
+
+**相关 Issue**: #295, #317
+
+---
+
+## 3. 自建模型只思考不画图
+
+**问题**: 本地部署的模型（如 Qwen、LiteLLM）只输出思考过程，不生成图表
+
+**可能原因**:
+1. **模型太小** - 小模型难以正确遵循 tool calling 指令，建议使用 32B+ 参数的模型
+2. **未开启 tool calling** - 模型服务需要配置 tool use 功能
+
+**解决方案**: 开启 tool calling，例如 vLLM：
+```bash
+python -m vllm.entrypoints.openai.api_server \
+    --model Qwen/Qwen3-32B \
+    --enable-auto-tool-choice \
+    --tool-call-parser hermes
+```
+
+**相关 Issue**: #269, #75
+
+---
+
+## 4. 上传图片后提示"未提供图片"
+
+**问题**: 上传图片后，系统显示"未提供图片"错误
+
+**可能原因**:
+1. 模型不支持视觉功能（如 Kimi K2、DeepSeek、Qwen 文本模型）
+
+**解决方案**:
+- 使用支持视觉的模型：GPT-5.2、Claude 4.5 Sonnet、Gemini 3 Pro
+- 模型名带 `vision` 或 `vl` 的支持图片
+- 更新到最新版本（v0.4.9+）
+
+**相关 Issue**: #324, #421, #469

docs/cn/README_CN.md

@@ -19,7 +19,9 @@
 
 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://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！
+> 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>
 
 https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979
 
@@ -28,7 +30,7 @@ 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（预览）](#mcp服务器预览)
+  - [MCP服务器](#mcp服务器)
     - [Claude Code CLI](#claude-code-cli)
   - [快速开始](#快速开始)
     - [在线试用](#在线试用)
@@ -37,11 +39,12 @@ https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979
     - [安装](#安装)
   - [部署](#部署)
     - [部署到腾讯云EdgeOne Pages](#部署到腾讯云edgeone-pages)
-    - [部署到Vercel（推荐）](#部署到vercel推荐)
+    - [部署到Vercel](#部署到vercel)
     - [部署到Cloudflare Workers](#部署到cloudflare-workers)
   - [多提供商支持](#多提供商支持)
   - [工作原理](#工作原理)
   - [支持与联系](#支持与联系)
+  - [常见问题](#常见问题)
   - [Star历史](#star历史)
 
 ## 示例
@@ -53,31 +56,31 @@ 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>提示词：</strong> 给我一个带有**动画连接器**的Transformer架构图。</p>
+      <p><strong>Prompt:</strong> Give me a **animated connector** diagram of transformer's architecture.</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>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" />
+      <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" />
     </td>
     <td width="50%" valign="top">
-      <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" />
+      <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" />
     </td>
   </tr>
   <tr>
     <td width="50%" valign="top">
-      <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" />
+      <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" />
     </td>
     <td width="50%" valign="top">
       <strong>猫咪素描</strong><br />
-      <p><strong>提示词：</strong> 给我画一只可爱的猫。</p>
+      <p><strong>Prompt:</strong> Draw a cute cat for me.</p>
       <img src="../../public/cat_demo.svg" alt="猫咪绘图" width="240" />
     </td>
   </tr>
@@ -95,9 +98,7 @@ https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979
 -   **云架构图支持**：专门支持生成云架构图（AWS、GCP、Azure）
 -   **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（预览）
-
-> **预览功能**：此功能为实验性功能，可能不稳定。
+## MCP服务器
 
 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。
 
@@ -179,7 +180,7 @@ npm run dev
 
 同时，通过腾讯云EdgeOne Pages部署，也会获得[每日免费的DeepSeek模型额度](https://edgeone.cloud.tencent.com/pages/document/169925463311781888)。
 
-### 部署到Vercel（推荐）
+### 部署到Vercel
 
 [![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2FDayuanJiang%2Fnext-ai-draw-io)
 
@@ -194,16 +195,19 @@ npm run dev
 
 ## 多提供商支持
 
--   [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)
+-   [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)
 -   AWS Bedrock（默认）
 -   OpenAI
 -   Anthropic
 -   Google AI
+-   Google Vertex AI
 -   Azure OpenAI
 -   Ollama
 -   OpenRouter
+-   AIHubMix
 -   DeepSeek
 -   SiliconFlow
+-   ModelScope
 -   SGLang
 -   Vercel AI Gateway
 
@@ -211,10 +215,20 @@ 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
 
@@ -229,7 +243,7 @@ npm run dev
 
 ## 支持与联系
 
-**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！
+**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！
 
 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！
 
@@ -237,6 +251,10 @@ npm run dev
 
 -   邮箱：me[at]jiang.jp
 
+## 常见问题
+
+请参阅 [FAQ](./FAQ.md) 了解常见问题和解决方案。
+
 ## Star历史
 
 [![Star History Chart](https://api.star-history.com/svg?repos=DayuanJiang/next-ai-draw-io&type=date&legend=top-left)](https://www.star-history.com/#DayuanJiang/next-ai-draw-io&type=date&legend=top-left)

docs/cn/admin-panel.md

@@ -0,0 +1,24 @@
+# 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。

docs/cn/ai-providers.md

@@ -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://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！
+> **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！
 
 ```bash
 DOUBAO_API_KEY=your_api_key
@@ -46,6 +46,21 @@ 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
@@ -53,6 +68,13 @@ 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
@@ -152,6 +174,19 @@ AI_PROVIDER=ollama
 AI_MODEL=llama3.2
 ```
 
+### ModelScope
+
+```bash
+MODELSCOPE_API_KEY=your_api_key
+AI_MODEL=Qwen/Qwen3-235B-A22B-Instruct-2507
+```
+
+可选的自定义端点：
+
+```bash
+MODELSCOPE_BASE_URL=https://your-custom-endpoint
+```
+
 可选的自定义 URL：
 
 ```bash
@@ -194,6 +229,98 @@ 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`。
@@ -201,9 +328,77 @@ AI_MODEL=openai/gpt-4o
 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, deepseek, siliconflow, doubao, azure, bedrock, openrouter, ollama, gateway, sglang
+AI_PROVIDER=google  # 或：openai, anthropic, aihubmix, deepseek, siliconflow, doubao, azure, bedrock, openrouter, ollama, gateway, sglang, modelscope, minimax, glm, qwen, kimi, qiniu, mimo
 ```
 
+## 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。

docs/en/FAQ.md

@@ -0,0 +1,78 @@
+# Frequently Asked Questions (FAQ)
+
+---
+
+## 1. Cannot Export PDF
+
+**Problem**: Web version redirects to `convert.diagrams.net/node/export` when exporting PDF, then nothing happens
+
+**Cause**: Embedded Draw.io doesn't support direct PDF export, it relies on external conversion service which doesn't work in iframe
+
+**Solution**: Export as image (PNG) first, then print to PDF
+
+**Related Issues**: #539, #125
+
+---
+
+## 2. Cannot Access embed.diagrams.net (Offline/Intranet Deployment)
+
+**Problem**: Intranet environment shows "Cannot find server IP address for embed.diagrams.net"
+
+**Key Point**: `NEXT_PUBLIC_*` environment variables are **build-time** variables, they get bundled into JS code. **Runtime settings don't work!**
+
+**Solution**: Must pass via `args` at build time:
+
+```yaml
+# docker-compose.yml
+services:
+  drawio:
+    image: jgraph/drawio:latest
+    ports: ["8080:8080"]
+  next-ai-draw-io:
+    build:
+      context: .
+      args:
+        - NEXT_PUBLIC_DRAWIO_BASE_URL=http://your-server-ip:8080/
+    ports: ["3000:3000"]
+    env_file: .env
+```
+
+**Intranet Users**: Modify Dockerfile and build image on external network, then transfer to intranet
+
+**Related Issues**: #295, #317
+
+---
+
+## 3. Self-hosted Model Only Thinks But Doesn't Draw
+
+**Problem**: Locally deployed models (e.g., Qwen, LiteLLM) only output thinking process, don't generate diagrams
+
+**Possible Causes**:
+1. **Model too small** - Small models struggle to follow tool calling instructions correctly, recommend 32B+ parameter models
+2. **Tool calling not enabled** - Model service needs tool use configuration
+
+**Solution**: Enable tool calling, e.g., vLLM:
+```bash
+python -m vllm.entrypoints.openai.api_server \
+    --model Qwen/Qwen3-32B \
+    --enable-auto-tool-choice \
+    --tool-call-parser hermes
+```
+
+**Related Issues**: #269, #75
+
+---
+
+## 4. "No Image Provided" After Uploading Image
+
+**Problem**: After uploading an image, the system shows "No image provided" error
+
+**Possible Causes**:
+1. Model doesn't support vision (e.g., Kimi K2, DeepSeek, Qwen text models)
+
+**Solution**:
+- Use vision-capable models: GPT-5.2, Claude 4.5 Sonnet, Gemini 3 Pro
+- Models with `vision` or `vl` in name support images
+- Update to latest version (v0.4.9+)
+
+**Related Issues**: #324, #421, #469

docs/en/admin-panel.md

@@ -0,0 +1,24 @@
+# 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.

docs/en/ai-providers.md

@@ -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://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!
+> **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!
 
 ```bash
 DOUBAO_API_KEY=your_api_key
@@ -33,6 +33,21 @@ 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
@@ -46,6 +61,21 @@ 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
@@ -53,6 +83,13 @@ 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
@@ -158,6 +195,19 @@ Optional custom URL:
 OLLAMA_BASE_URL=http://localhost:11434
 ```
 
+### ModelScope
+
+```bash
+MODELSCOPE_API_KEY=your_api_key
+AI_MODEL=Qwen/Qwen3-235B-A22B-Instruct-2507
+```
+
+Optional custom endpoint:
+
+```bash
+MODELSCOPE_BASE_URL=https://your-custom-endpoint
+```
+
 ### Vercel AI Gateway
 
 Vercel AI Gateway provides unified access to multiple AI providers through a single API key. This simplifies authentication and allows you to switch between providers without managing multiple API keys.
@@ -194,6 +244,98 @@ 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`.
@@ -201,9 +343,77 @@ 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, deepseek, siliconflow, doubao, azure, bedrock, openrouter, ollama, gateway, sglang
+AI_PROVIDER=google  # or: openai, anthropic, aihubmix, deepseek, siliconflow, doubao, azure, bedrock, openrouter, ollama, gateway, sglang, modelscope, minimax, glm, qwen, kimi, qiniu, mimo
 ```
 
+## 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).

docs/en/docker.md

@@ -22,6 +22,27 @@ 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.

docs/ja/FAQ.md

@@ -0,0 +1,78 @@
+# よくある質問 (FAQ)
+
+---
+
+## 1. PDFをエクスポートできない
+
+**問題**: Web版でPDFエクスポートをクリックすると `convert.diagrams.net/node/export` にリダイレクトされ、その後何も起こらない
+
+**原因**: 埋め込みDraw.ioは直接PDFエクスポートをサポートしておらず、外部変換サービスに依存しているが、iframe内では正常に動作しない
+
+**解決策**: まず画像（PNG）としてエクスポートし、その後PDFに印刷する
+
+**関連Issue**: #539, #125
+
+---
+
+## 2. embed.diagrams.netにアクセスできない（オフライン/イントラネットデプロイ）
+
+**問題**: イントラネット環境で「embed.diagrams.netのサーバーIPアドレスが見つかりません」と表示される
+
+**重要**: `NEXT_PUBLIC_*` 環境変数は**ビルド時**変数であり、JSコードにバンドルされます。**実行時の設定は無効です！**
+
+**解決策**: ビルド時に `args` で渡す必要があります：
+
+```yaml
+# docker-compose.yml
+services:
+  drawio:
+    image: jgraph/drawio:latest
+    ports: ["8080:8080"]
+  next-ai-draw-io:
+    build:
+      context: .
+      args:
+        - NEXT_PUBLIC_DRAWIO_BASE_URL=http://あなたのサーバーIP:8080/
+    ports: ["3000:3000"]
+    env_file: .env
+```
+
+**イントラネットユーザー**: 外部ネットワークでDockerfileを修正してイメージをビルドし、イントラネットに転送する
+
+**関連Issue**: #295, #317
+
+---
+
+## 3. 自前モデルが思考するだけで描画しない
+
+**問題**: ローカルデプロイのモデル（Qwen、LiteLLMなど）が思考過程のみを出力し、図表を生成しない
+
+**考えられる原因**:
+1. **モデルが小さすぎる** - 小さいモデルはtool calling指示に正しく従うことが難しい、32B+パラメータのモデルを推奨
+2. **tool callingが有効になっていない** - モデルサービスでtool use機能を設定する必要がある
+
+**解決策**: tool callingを有効にする、例えばvLLM：
+```bash
+python -m vllm.entrypoints.openai.api_server \
+    --model Qwen/Qwen3-32B \
+    --enable-auto-tool-choice \
+    --tool-call-parser hermes
+```
+
+**関連Issue**: #269, #75
+
+---
+
+## 4. 画像アップロード後「画像が提供されていません」と表示される
+
+**問題**: 画像をアップロードした後、「画像が提供されていません」というエラーが表示される
+
+**考えられる原因**:
+1. モデルがビジョン機能をサポートしていない（Kimi K2、DeepSeek、Qwenテキストモデルなど）
+
+**解決策**:
+- ビジョン対応モデルを使用：GPT-5.2、Claude 4.5 Sonnet、Gemini 3 Pro
+- モデル名に `vision` または `vl` が含まれているものは画像をサポート
+- 最新バージョン（v0.4.9+）にアップデート
+
+**関連Issue**: #324, #421, #469

docs/ja/README_JA.md

@@ -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://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！
+> 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！
 
 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（プレビュー）](#mcpサーバープレビュー)
+  - [MCPサーバー](#mcpサーバー)
     - [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)
@@ -37,11 +37,12 @@ https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979
     - [インストール](#インストール)
   - [デプロイ](#デプロイ)
     - [EdgeOne Pagesへのデプロイ](#edgeone-pagesへのデプロイ)
-    - [Vercelへのデプロイ（推奨）](#vercelへのデプロイ推奨)
+    - [Vercelへのデプロイ](#vercelへのデプロイ)
     - [Cloudflare Workersへのデプロイ](#cloudflare-workersへのデプロイ)
   - [マルチプロバイダーサポート](#マルチプロバイダーサポート)
   - [仕組み](#仕組み)
   - [サポート＆お問い合わせ](#サポートお問い合わせ)
+  - [よくある質問](#よくある質問)
   - [スター履歴](#スター履歴)
 
 ## 例
@@ -53,31 +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>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>
+      <p><strong>Prompt:</strong> Give me a **animated connector** diagram of transformer's architecture.</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>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" />
+      <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" />
     </td>
     <td width="50%" valign="top">
-      <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" />
+      <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" />
     </td>
   </tr>
   <tr>
     <td width="50%" valign="top">
-      <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" />
+      <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" />
     </td>
     <td width="50%" valign="top">
       <strong>猫のスケッチ</strong><br />
-      <p><strong>プロンプト：</strong> かわいい猫を描いてください。</p>
+      <p><strong>Prompt:</strong> Draw a cute cat for me.</p>
       <img src="../../public/cat_demo.svg" alt="猫の絵" width="240" />
     </td>
   </tr>
@@ -95,9 +96,7 @@ https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979
 -   **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）
 -   **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（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サーバー
 
 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。
 
@@ -180,7 +179,7 @@ npm run dev
 
 また、Tencent EdgeOne Pagesでデプロイすると、[DeepSeekモデルの毎日の無料クォータ](https://pages.edgeone.ai/document/edge-ai)が付与されます。
 
-### Vercelへのデプロイ（推奨）
+### Vercelへのデプロイ
 
 [![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2FDayuanJiang%2Fnext-ai-draw-io)
 
@@ -195,16 +194,19 @@ 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://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)
+-   [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)
 -   AWS Bedrock（デフォルト）
 -   OpenAI
 -   Anthropic
 -   Google AI
+-   Google Vertex AI
 -   Azure OpenAI
 -   Ollama
 -   OpenRouter
+-   AIHubMix
 -   DeepSeek
 -   SiliconFlow
+-   ModelScope
 -   SGLang
 -   Vercel AI Gateway
 
@@ -212,10 +214,20 @@ 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
 
@@ -230,7 +242,7 @@ 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://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！
+**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！
 
 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！
 
@@ -238,6 +250,10 @@ AWS BedrockとOpenRouter以外のすべてのプロバイダーはカスタム
 
 -   メール：me[at]jiang.jp
 
+## よくある質問
+
+一般的な問題と解決策については [FAQ](./FAQ.md) をご覧ください。
+
 ## スター履歴
 
 [![Star History Chart](https://api.star-history.com/svg?repos=DayuanJiang/next-ai-draw-io&type=date&legend=top-left)](https://www.star-history.com/#DayuanJiang/next-ai-draw-io&type=date&legend=top-left)

docs/ja/admin-panel.md

@@ -0,0 +1,24 @@
+# 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。

docs/ja/ai-providers.md

@@ -13,7 +13,7 @@
 
 ### Doubao (ByteDance Volcengine)
 
-> **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！
+> **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！
 
 ```bash
 DOUBAO_API_KEY=your_api_key
@@ -46,6 +46,21 @@ 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
@@ -53,6 +68,13 @@ 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
@@ -158,6 +180,19 @@ AI_MODEL=llama3.2
 OLLAMA_BASE_URL=http://localhost:11434
 ```
 
+### ModelScope
+
+```bash
+MODELSCOPE_API_KEY=your_api_key
+AI_MODEL=Qwen/Qwen3-235B-A22B-Instruct-2507
+```
+
+任意のカスタムエンドポイント:
+
+```bash
+MODELSCOPE_BASE_URL=https://your-custom-endpoint
+```
+
 ### Vercel AI Gateway
 
 Vercel AI Gateway は、単一の API キーで複数の AI プロバイダーへの統合アクセスを提供します。これにより認証が簡素化され、複数の API キーを管理することなくプロバイダーを切り替えることができます。
@@ -194,6 +229,98 @@ 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。
@@ -201,9 +328,77 @@ AI_MODEL=openai/gpt-4o
 **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, deepseek, siliconflow, doubao, azure, bedrock, openrouter, ollama, gateway, sglang
+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
 ```
 
+## 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。

docs/shape-libraries/material_design.md

@@ -0,0 +1,367 @@
+# 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)

edge-functions/api/edgeai/chat/completions.ts

@@ -67,41 +67,62 @@ const MODEL_ALIASES: Record<string, string> = {
     "deepseek-v3-0324": "@tx/deepseek-ai/deepseek-v3-0324",
 }
 
-const CORS_HEADERS = {
-    "Access-Control-Allow-Origin": "*",
-    "Access-Control-Allow-Methods": "POST, OPTIONS",
-    "Access-Control-Allow-Headers": "Content-Type, Authorization",
-}
-
 /**
- * Create standardized response with CORS headers
+ * Create standardized JSON response
  */
 function createResponse(body: any, status = 200, extraHeaders = {}): Response {
     return new Response(JSON.stringify(body), {
         status,
         headers: {
             "Content-Type": "application/json",
-            ...CORS_HEADERS,
             ...extraHeaders,
         },
     })
 }
 
-/**
- * Handle OPTIONS request for CORS preflight
- */
-function handleOptionsRequest(): Response {
-    return new Response(null, {
-        headers: {
-            ...CORS_HEADERS,
-            "Access-Control-Max-Age": "86400",
-        },
-    })
+// Only the app's own server (/api/chat, /api/validate-model) calls this
+// function, so no CORS headers are sent: other sites' pages can't call it
+// from a browser and spend the deployment's Edge AI quota.
+// Same rule as lib/access-code.ts, but reading the edge function's env.
+// No codes configured (or env unavailable) means no check.
+function hasValidAccessCode(request: Request, env: any): boolean {
+    const accessCodes: string[] =
+        env?.ACCESS_CODE_LIST?.split(",")
+            .map((code: string) => code.trim())
+            .filter(Boolean) || []
+    if (accessCodes.length === 0) return true
+    const accessCode = request.headers.get("x-access-code")
+    return !!accessCode && accessCodes.includes(accessCode)
 }
 
-export async function onRequest({ request, env: _env }: any) {
-    if (request.method === "OPTIONS") {
-        return handleOptionsRequest()
+export async function onRequest({ request, env }: any) {
+    // Requiring JSON also makes any cross-site browser request need a CORS
+    // preflight, which fails without CORS headers
+    if (
+        request.method !== "POST" ||
+        !request.headers.get("content-type")?.includes("application/json")
+    ) {
+        return createResponse(
+            {
+                error: {
+                    message: "Expected a POST request with a JSON body",
+                    type: "invalid_request_error",
+                },
+            },
+            400,
+        )
+    }
+
+    if (!hasValidAccessCode(request, env)) {
+        return createResponse(
+            {
+                error: {
+                    message: "Invalid or missing access code",
+                    type: "invalid_request_error",
+                },
+            },
+            401,
+        )
     }
 
     request.headers.delete("accept-encoding")
@@ -153,7 +174,7 @@ export async function onRequest({ request, env: _env }: any) {
                         type: "invalid_request_error",
                     },
                 },
-                429,
+                400,
             )
         }
 
@@ -216,7 +237,6 @@ export async function onRequest({ request, env: _env }: any) {
                     "Cache-Control": "no-cache, no-store, no-transform",
                     "X-Accel-Buffering": "no",
                     Connection: "keep-alive",
-                    ...CORS_HEADERS,
                 },
             })
         } catch (error: any) {

electron/electron-builder.yml

@@ -10,8 +10,13 @@ directories:
 afterPack: ./scripts/afterPack.cjs
 
 files:
-  - dist-electron/**/*
-  - "!node_modules"
+  - from: dist-electron
+    to: dist-electron
+    filter:
+      - "**/*"
+  - from: .
+    filter:
+      - package.json
 
 asarUnpack:
   - "**/*.node"
@@ -37,10 +42,11 @@ mac:
       arch:
         - x64
         - arm64
-  hardenedRuntime: true
+  # 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
   gatekeeperAssess: false
-  entitlements: resources/entitlements.mac.plist
-  entitlementsInherit: resources/entitlements.mac.plist
 
 dmg:
   contents:
@@ -89,6 +95,10 @@ linux:
       arch:
         - x64
         - arm64
+    - target: rpm
+      arch:
+        - x64
+        - arm64
 
 # Publish configuration (optional)
 publish:

electron/electron.d.ts

@@ -25,6 +25,25 @@ interface ApplyPresetResult {
     env?: Record<string, string>
 }
 
+/** Proxy configuration interface */
+interface ProxyConfig {
+    httpProxy?: string
+    httpsProxy?: string
+}
+
+/** Result of setting proxy */
+interface SetProxyResult {
+    success: boolean
+    error?: string
+    devMode?: boolean
+}
+
+/** Result of setting user locale */
+interface SetUserLocaleResult {
+    success: boolean
+    error?: string
+}
+
 declare global {
     interface Window {
         /** Main window Electron API */
@@ -45,6 +64,16 @@ declare global {
             openFile: () => Promise<string | null>
             /** Save data to file via save dialog */
             saveFile: (data: string) => Promise<boolean>
+            /** Get proxy configuration */
+            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 */
@@ -71,4 +100,10 @@ declare global {
     }
 }
 
-export { ConfigPreset, ApplyPresetResult }
+export type {
+    ApplyPresetResult,
+    ConfigPreset,
+    ProxyConfig,
+    SetProxyResult,
+    SetUserLocaleResult,
+}

electron/main/app-menu.ts

@@ -12,11 +12,12 @@ 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
+ * Build and set the application menu with i18n support
  */
 export function buildAppMenu(): void {
     const template = getMenuTemplate()
@@ -25,18 +26,71 @@ export function buildAppMenu(): void {
 }
 
 /**
- * Rebuild the menu (call this when presets change)
+ * Rebuild the menu (call this when presets change or language changes)
  */
 export function rebuildAppMenu(): void {
     buildAppMenu()
 }
 
 /**
- * Get the menu template
+ * Apply a preset and restart the server so it takes effect.
+ * If the restart fails, go back to the previous preset and restart again,
+ * so the running server always matches the saved current preset.
+ * Throws an error describing the outcome on failure.
+ */
+export async function switchPreset(
+    id: string,
+): Promise<Record<string, string>> {
+    const previousPresetId = getCurrentPresetId()
+    const env = applyPresetToEnv(id)
+    if (!env) {
+        throw new Error("Preset not found")
+    }
+    rebuildAppMenu()
+
+    // In development, scripts/electron-dev.mjs restarts the Next.js dev server
+    if (!app.isPackaged) {
+        return env
+    }
+
+    try {
+        await restartNextServer()
+        return env
+    } catch (error) {
+        console.error("Failed to restart server:", error)
+        const reason = error instanceof Error ? error.message : String(error)
+
+        // Revert to previous preset on failure
+        if (!previousPresetId || !applyPresetToEnv(previousPresetId)) {
+            setCurrentPreset(null)
+        }
+        // Rebuild menu to restore previous checkmark state
+        rebuildAppMenu()
+
+        try {
+            await restartNextServer()
+        } catch (retryError) {
+            console.error("Failed to restart server again:", retryError)
+            throw new Error(
+                `The server could not be restarted.\n\nPlease restart the app.\n\nError: ${reason}`,
+            )
+        }
+        throw new Error(
+            `The server could not be restarted.\n\nThe previous configuration has been restored.\n\nError: ${reason}`,
+        )
+    }
+}
+
+/**
+ * Get the menu template with translations
  */
 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
@@ -44,10 +98,10 @@ function getMenuTemplate(): MenuItemConstructorOptions[] {
         template.push({
             label: app.name,
             submenu: [
-                { role: "about" },
+                { role: "about" }, // System-translated
                 { type: "separator" },
                 {
-                    label: "Settings...",
+                    label: t.settings,
                     accelerator: "CmdOrCtrl+,",
                     click: () => {
                         const win = BrowserWindow.getFocusedWindow()
@@ -55,26 +109,26 @@ function getMenuTemplate(): MenuItemConstructorOptions[] {
                     },
                 },
                 { type: "separator" },
-                { role: "services" },
+                { role: "services" }, // System-translated
                 { type: "separator" },
-                { role: "hide" },
-                { role: "hideOthers" },
-                { role: "unhide" },
+                { role: "hide" }, // System-translated
+                { role: "hideOthers" }, // System-translated
+                { role: "unhide" }, // System-translated
                 { type: "separator" },
-                { role: "quit" },
+                { role: "quit" }, // System-translated
             ],
         })
     }
 
     // File menu
     template.push({
-        label: "File",
+        label: t.file,
         submenu: [
             ...(isMac
                 ? []
                 : [
                       {
-                          label: "Settings",
+                          label: t.settings,
                           accelerator: "CmdOrCtrl+,",
                           click: () => {
                               const win = BrowserWindow.getFocusedWindow()
@@ -83,76 +137,76 @@ function getMenuTemplate(): MenuItemConstructorOptions[] {
                       },
                       { type: "separator" } as MenuItemConstructorOptions,
                   ]),
-            isMac ? { role: "close" } : { role: "quit" },
+            isMac ? { role: "close" } : { role: "quit" }, // System-translated
         ],
     })
 
     // Edit menu
     template.push({
-        label: "Edit",
+        label: t.edit,
         submenu: [
-            { role: "undo" },
-            { role: "redo" },
+            { role: "undo" }, // System-translated
+            { role: "redo" }, // System-translated
             { type: "separator" },
-            { role: "cut" },
-            { role: "copy" },
-            { role: "paste" },
+            { role: "cut" }, // System-translated
+            { role: "copy" }, // System-translated
+            { role: "paste" }, // System-translated
             ...(isMac
                 ? [
                       {
                           role: "pasteAndMatchStyle",
-                      } as MenuItemConstructorOptions,
-                      { role: "delete" } as MenuItemConstructorOptions,
-                      { role: "selectAll" } as MenuItemConstructorOptions,
+                      } as MenuItemConstructorOptions, // System-translated
+                      { role: "delete" } as MenuItemConstructorOptions, // System-translated
+                      { role: "selectAll" } as MenuItemConstructorOptions, // System-translated
                   ]
                 : [
-                      { role: "delete" } as MenuItemConstructorOptions,
+                      { role: "delete" } as MenuItemConstructorOptions, // System-translated
                       { type: "separator" } as MenuItemConstructorOptions,
-                      { role: "selectAll" } as MenuItemConstructorOptions,
+                      { role: "selectAll" } as MenuItemConstructorOptions, // System-translated
                   ]),
         ],
     })
 
     // View menu
     template.push({
-        label: "View",
+        label: t.view,
         submenu: [
-            { role: "reload" },
-            { role: "forceReload" },
-            { role: "toggleDevTools" },
+            { role: "reload" }, // System-translated
+            { role: "forceReload" }, // System-translated
+            { role: "toggleDevTools" }, // System-translated
             { type: "separator" },
-            { role: "resetZoom" },
-            { role: "zoomIn" },
-            { role: "zoomOut" },
+            { role: "resetZoom" }, // System-translated
+            { role: "zoomIn" }, // System-translated
+            { role: "zoomOut" }, // System-translated
             { type: "separator" },
-            { role: "togglefullscreen" },
+            { role: "togglefullscreen" }, // System-translated
         ],
     })
 
     // Configuration menu with presets
-    template.push(buildConfigMenu())
+    template.push(buildConfigMenu(t))
 
     // Window menu
     template.push({
-        label: "Window",
+        label: t.window,
         submenu: [
-            { role: "minimize" },
-            { role: "zoom" },
+            { role: "minimize" }, // System-translated
+            { role: "zoom" }, // System-translated
             ...(isMac
                 ? [
                       { type: "separator" } as MenuItemConstructorOptions,
-                      { role: "front" } as MenuItemConstructorOptions,
+                      { role: "front" } as MenuItemConstructorOptions, // System-translated
                   ]
-                : [{ role: "close" } as MenuItemConstructorOptions]),
+                : [{ role: "close" } as MenuItemConstructorOptions]), // System-translated
         ],
     })
 
     // Help menu
     template.push({
-        label: "Help",
+        label: t.help,
         submenu: [
             {
-                label: "Documentation",
+                label: t.documentation,
                 click: async () => {
                     await shell.openExternal(
                         "https://github.com/dayuanjiang/next-ai-draw-io",
@@ -160,7 +214,7 @@ function getMenuTemplate(): MenuItemConstructorOptions[] {
                 },
             },
             {
-                label: "Report Issue",
+                label: t.reportIssue,
                 click: async () => {
                     await shell.openExternal(
                         "https://github.com/dayuanjiang/next-ai-draw-io/issues",
@@ -176,7 +230,9 @@ function getMenuTemplate(): MenuItemConstructorOptions[] {
 /**
  * Build the Configuration menu with presets
  */
-function buildConfigMenu(): MenuItemConstructorOptions {
+function buildConfigMenu(
+    t: ReturnType<typeof getMenuTranslations>,
+): MenuItemConstructorOptions {
     const presets = getAllPresets()
     const currentPresetId = getCurrentPresetId()
 
@@ -185,42 +241,24 @@ function buildConfigMenu(): MenuItemConstructorOptions {
         type: "radio",
         checked: preset.id === currentPresetId,
         click: async () => {
-            const previousPresetId = getCurrentPresetId()
-            const env = applyPresetToEnv(preset.id)
-
-            if (env) {
-                try {
-                    await restartNextServer()
-                    rebuildAppMenu() // Rebuild menu to update checkmarks
-                } catch (error) {
-                    console.error("Failed to restart server:", error)
-
-                    // Revert to previous preset on failure
-                    if (previousPresetId) {
-                        applyPresetToEnv(previousPresetId)
-                    } else {
-                        setCurrentPreset(null)
-                    }
-
-                    // Rebuild menu to restore previous checkmark state
-                    rebuildAppMenu()
-
-                    // Show error dialog to notify user
-                    dialog.showErrorBox(
-                        "Configuration Error",
-                        `Failed to apply preset "${preset.name}". The server could not be restarted.\n\nThe previous configuration has been restored.\n\nError: ${error instanceof Error ? error.message : String(error)}`,
-                    )
-                }
+            try {
+                await switchPreset(preset.id)
+            } catch (error) {
+                // Show error dialog to notify user
+                dialog.showErrorBox(
+                    "Configuration Error",
+                    `Failed to apply preset "${preset.name}". ${error instanceof Error ? error.message : String(error)}`,
+                )
             }
         },
     }))
 
     return {
-        label: "Configuration",
+        label: t.configuration,
         submenu: [
             ...(presetItems.length > 0
                 ? [
-                      { label: "Switch Preset", enabled: false },
+                      { label: t.switchPreset, enabled: false },
                       { type: "separator" } as MenuItemConstructorOptions,
                       ...presetItems,
                       { type: "separator" } as MenuItemConstructorOptions,
@@ -229,8 +267,8 @@ function buildConfigMenu(): MenuItemConstructorOptions {
             {
                 label:
                     presetItems.length > 0
-                        ? "Manage Presets..."
-                        : "Add Configuration Preset...",
+                        ? t.managePresets
+                        : t.addConfigurationPreset,
                 click: () => {
                     const win = BrowserWindow.getFocusedWindow()
                     showSettingsWindow(win || undefined)

electron/main/config-manager.ts

@@ -1,5 +1,11 @@
 import { randomUUID } from "node:crypto"
-import { existsSync, mkdirSync, readFileSync, writeFileSync } from "node:fs"
+import {
+    existsSync,
+    mkdirSync,
+    readFileSync,
+    renameSync,
+    writeFileSync,
+} from "node:fs"
 import path from "node:path"
 import { app, safeStorage } from "electron"
 
@@ -30,7 +36,9 @@ let hasWarnedAboutPlaintext = false
  * Warns if encryption is not available (API key stored in plaintext)
  */
 function encryptValue(value: string): string {
-    if (!value) {
+    // Already encrypted (a value that could not be decrypted): keep it as is
+    // instead of wrapping it in a second layer of encryption
+    if (!value || value.startsWith(ENCRYPTED_PREFIX)) {
         return value
     }
 
@@ -61,6 +69,7 @@ function encryptValue(value: string): string {
 /**
  * Decrypt a sensitive value using safeStorage
  * Returns the original value if it's not encrypted or decryption fails
+ * (so saving writes the stored ciphertext back unchanged)
  */
 function decryptValue(value: string): string {
     if (!value || !value.startsWith(ENCRYPTED_PREFIX)) {
@@ -137,6 +146,7 @@ interface ConfigPresetsFile {
     version: 1
     currentPresetId: string | null
     presets: ConfigPreset[]
+    userLocale?: "en" | "zh" | "ja" | "zh-Hant"
 }
 
 const CONFIG_FILE_NAME = "config-presets.json"
@@ -161,6 +171,7 @@ export function loadPresets(): ConfigPresetsFile {
             version: 1,
             currentPresetId: null,
             presets: [],
+            userLocale: undefined,
         }
     }
 
@@ -177,10 +188,20 @@ export function loadPresets(): ConfigPresetsFile {
         return data
     } catch (error) {
         console.error("Failed to load config presets:", error)
+        // Move the unreadable file aside so the next save can't overwrite
+        // the user's presets with an empty list
+        const backupPath = `${configPath}.corrupt-${Date.now()}`
+        try {
+            renameSync(configPath, backupPath)
+            console.error(`Unreadable config presets moved to ${backupPath}`)
+        } catch (renameError) {
+            console.error("Failed to back up config presets:", renameError)
+        }
         return {
             version: 1,
             currentPresetId: null,
             presets: [],
+            userLocale: undefined,
         }
     }
 }
@@ -208,7 +229,11 @@ export function savePresets(data: ConfigPresetsFile): void {
     }
 
     try {
-        writeFileSync(configPath, JSON.stringify(dataToSave, null, 2), "utf-8")
+        // Write a temp file and rename it, so a crash mid-write can't leave
+        // a truncated config file
+        const tempPath = `${configPath}.tmp`
+        writeFileSync(tempPath, JSON.stringify(dataToSave, null, 2), "utf-8")
+        renameSync(tempPath, configPath)
     } catch (error) {
         console.error("Failed to save config presets:", error)
         throw error
@@ -304,9 +329,10 @@ export function deletePreset(id: string): boolean {
 
     data.presets.splice(index, 1)
 
-    // Clear current preset if it was deleted
+    // Clear current preset (and its env vars) if it was deleted
     if (data.currentPresetId === id) {
         data.currentPresetId = null
+        setPresetEnv(null)
     }
 
     savePresets(data)
@@ -319,13 +345,15 @@ export function deletePreset(id: string): boolean {
 export function setCurrentPreset(id: string | null): boolean {
     const data = loadPresets()
 
+    let preset: ConfigPreset | null = null
     if (id !== null) {
-        const preset = data.presets.find((p) => p.id === id)
+        preset = data.presets.find((p) => p.id === id) || null
         if (!preset) {
             return false
         }
     }
 
+    setPresetEnv(preset)
     data.currentPresetId = id
     savePresets(data)
     return true
@@ -351,85 +379,34 @@ const PROVIDER_ENV_MAP: Record<string, { apiKey: string; baseUrl: string }> = {
         apiKey: "SILICONFLOW_API_KEY",
         baseUrl: "SILICONFLOW_BASE_URL",
     },
+    modelscope: {
+        apiKey: "MODELSCOPE_API_KEY",
+        baseUrl: "MODELSCOPE_BASE_URL",
+    },
     gateway: { apiKey: "AI_GATEWAY_API_KEY", baseUrl: "AI_GATEWAY_BASE_URL" },
-    // bedrock and ollama don't use API keys in the same way
+    // bedrock doesn't use API keys in the same way
     bedrock: { apiKey: "", baseUrl: "" },
-    ollama: { apiKey: "", baseUrl: "OLLAMA_BASE_URL" },
+    ollama: { apiKey: "OLLAMA_API_KEY", baseUrl: "OLLAMA_BASE_URL" },
 }
 
 /**
- * Apply preset environment variables to the current process
- * Returns the environment variables that were applied
- */
-export function applyPresetToEnv(id: string): Record<string, string> | null {
-    const data = loadPresets()
-    const preset = data.presets.find((p) => p.id === id)
-
-    if (!preset) {
-        return null
-    }
-
-    const appliedEnv: Record<string, string> = {}
-    const provider = preset.config.AI_PROVIDER?.toLowerCase()
-
-    for (const [key, value] of Object.entries(preset.config)) {
-        if (value !== undefined && value !== "") {
-            // Map generic AI_API_KEY to provider-specific key
-            if (
-                key === "AI_API_KEY" &&
-                provider &&
-                PROVIDER_ENV_MAP[provider]
-            ) {
-                const providerApiKey = PROVIDER_ENV_MAP[provider].apiKey
-                if (providerApiKey) {
-                    process.env[providerApiKey] = value
-                    appliedEnv[providerApiKey] = value
-                }
-            }
-            // Map generic AI_BASE_URL to provider-specific key
-            else if (
-                key === "AI_BASE_URL" &&
-                provider &&
-                PROVIDER_ENV_MAP[provider]
-            ) {
-                const providerBaseUrl = PROVIDER_ENV_MAP[provider].baseUrl
-                if (providerBaseUrl) {
-                    process.env[providerBaseUrl] = value
-                    appliedEnv[providerBaseUrl] = value
-                }
-            }
-            // Apply other env vars directly
-            else {
-                process.env[key] = value
-                appliedEnv[key] = value
-            }
-        }
-    }
-
-    // Set as current preset
-    data.currentPresetId = id
-    savePresets(data)
-
-    return appliedEnv
-}
-
-/**
- * Get environment variables from current preset
+ * Map a preset's config to environment variables
  * Maps generic AI_API_KEY/AI_BASE_URL to provider-specific keys
  */
-export function getCurrentPresetEnv(): Record<string, string> {
-    const preset = getCurrentPreset()
-    if (!preset) {
-        return {}
-    }
-
+function presetToEnv(preset: ConfigPreset): Record<string, string> {
     const env: Record<string, string> = {}
     const provider = preset.config.AI_PROVIDER?.toLowerCase()
 
     for (const [key, value] of Object.entries(preset.config)) {
         if (value !== undefined && value !== "") {
+            // A key that could not be decrypted is useless to the server
+            if (value.startsWith(ENCRYPTED_PREFIX)) {
+                console.warn(
+                    `Preset "${preset.name}": ${key} could not be decrypted. Please enter it again in Settings.`,
+                )
+            }
             // Map generic AI_API_KEY to provider-specific key
-            if (
+            else if (
                 key === "AI_API_KEY" &&
                 provider &&
                 PROVIDER_ENV_MAP[provider]
@@ -458,3 +435,107 @@ export function getCurrentPresetEnv(): Record<string, string> {
     }
     return env
 }
+
+/**
+ * Values that env vars had before a preset first set them
+ * (from the system or .env files), and the keys the active preset set
+ */
+const originalEnv: Record<string, string | undefined> = {}
+let presetEnvKeys: string[] = []
+
+/**
+ * Replace the env vars of the previous preset with those of the given preset
+ * (null leaves no preset applied). Restoring first means switching presets
+ * never leaves the previous preset's base URL, model or key behind.
+ */
+function setPresetEnv(preset: ConfigPreset | null): Record<string, string> {
+    for (const key of presetEnvKeys) {
+        if (originalEnv[key] === undefined) {
+            delete process.env[key]
+        } else {
+            process.env[key] = originalEnv[key]
+        }
+    }
+
+    const env = preset ? presetToEnv(preset) : {}
+    for (const [key, value] of Object.entries(env)) {
+        if (!(key in originalEnv)) {
+            originalEnv[key] = process.env[key]
+        }
+        process.env[key] = value
+    }
+    presetEnvKeys = Object.keys(env)
+
+    writeDevPresetEnv(env)
+    return env
+}
+
+const DEV_ENV_FILE_NAME = "dev-preset-env.json"
+
+/**
+ * Development only: write the active preset's env vars (decrypted and mapped)
+ * for scripts/electron-dev.mjs, which restarts the Next.js dev server when
+ * this file changes. The dev server can't decrypt the config file itself.
+ */
+function writeDevPresetEnv(env: Record<string, string>): void {
+    if (app.isPackaged) {
+        return
+    }
+    try {
+        const filePath = path.join(app.getPath("userData"), DEV_ENV_FILE_NAME)
+        writeFileSync(filePath, JSON.stringify(env, null, 2), {
+            encoding: "utf-8",
+            mode: 0o600,
+        })
+    } catch (error) {
+        console.error("Failed to write dev preset env:", error)
+    }
+}
+
+/**
+ * Apply preset environment variables to the current process
+ * Returns the environment variables that were applied
+ */
+export function applyPresetToEnv(id: string): Record<string, string> | null {
+    const data = loadPresets()
+    const preset = data.presets.find((p) => p.id === id)
+
+    if (!preset) {
+        return null
+    }
+
+    const appliedEnv = setPresetEnv(preset)
+
+    // Set as current preset
+    data.currentPresetId = id
+    savePresets(data)
+
+    return appliedEnv
+}
+
+/**
+ * Apply the saved current preset's environment variables (used at startup)
+ */
+export function applyCurrentPresetToEnv(): void {
+    setPresetEnv(getCurrentPreset())
+}
+
+/**
+ * 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)
+}

electron/main/env-loader.ts

@@ -48,12 +48,16 @@ function loadEnvFromFile(filePath: string): void {
             const key = trimmed.slice(0, equalIndex).trim()
             let value = trimmed.slice(equalIndex + 1).trim()
 
-            // Remove surrounding quotes
-            if (
-                (value.startsWith('"') && value.endsWith('"')) ||
-                (value.startsWith("'") && value.endsWith("'"))
-            ) {
-                value = value.slice(1, -1)
+            const quote = value[0]
+            const closingQuote =
+                quote === '"' || quote === "'" ? value.indexOf(quote, 1) : -1
+            if (closingQuote > 0) {
+                // Quoted value: keep what's inside the quotes and drop
+                // anything after them (e.g. a comment)
+                value = value.slice(1, closingQuote)
+            } else {
+                // Unquoted value: drop an inline comment ("value  # comment")
+                value = value.replace(/\s+#.*$/, "")
             }
 
             // Don't override existing environment variables

electron/main/index.ts

@@ -1,11 +1,17 @@
 import { app, BrowserWindow, dialog, shell } from "electron"
 import { buildAppMenu } from "./app-menu"
-import { getCurrentPresetEnv } from "./config-manager"
+import { applyCurrentPresetToEnv } from "./config-manager"
 import { loadEnvFile } from "./env-loader"
 import { registerIpcHandlers } from "./ipc-handlers"
 import { startNextServer, stopNextServer } from "./next-server"
+import { applyProxyToEnv } from "./proxy-manager"
 import { registerSettingsWindowHandlers } from "./settings-window"
-import { createWindow, getMainWindow } from "./window-manager"
+import {
+    createWindow,
+    getAppUrl,
+    getMainWindow,
+    isAppUrl,
+} from "./window-manager"
 
 // Single instance lock
 const gotTheLock = app.requestSingleInstanceLock()
@@ -24,16 +30,17 @@ if (!gotTheLock) {
     // Load environment variables from .env files
     loadEnvFile()
 
-    // Apply saved preset environment variables (overrides .env)
-    const presetEnv = getCurrentPresetEnv()
-    for (const [key, value] of Object.entries(presetEnv)) {
-        process.env[key] = value
-    }
+    // Apply proxy settings from saved config
+    applyProxyToEnv()
 
-    const isDev = process.env.NODE_ENV === "development"
-    let serverUrl: string | null = null
+    const isDev = !app.isPackaged
 
     app.whenReady().then(async () => {
+        // Apply saved preset environment variables (overrides .env).
+        // Must run after ready: on Windows and Linux safeStorage can't
+        // decrypt the API key before that.
+        applyCurrentPresetToEnv()
+
         // Register IPC handlers
         registerIpcHandlers()
         registerSettingsWindowHandlers()
@@ -42,6 +49,7 @@ if (!gotTheLock) {
         buildAppMenu()
 
         try {
+            let serverUrl: string
             if (isDev) {
                 // Development: use the dev server URL
                 serverUrl =
@@ -65,8 +73,9 @@ if (!gotTheLock) {
 
         app.on("activate", () => {
             if (BrowserWindow.getAllWindows().length === 0) {
-                if (serverUrl) {
-                    createWindow(serverUrl)
+                const appUrl = getAppUrl()
+                if (appUrl) {
+                    createWindow(appUrl)
                 }
             }
         })
@@ -83,23 +92,47 @@ if (!gotTheLock) {
         stopNextServer()
     })
 
+    // Pages allowed inside app windows: the app server and draw.io
+    const isInAppUrl = (url: string): boolean => {
+        if (isAppUrl(url)) return true
+        try {
+            const { hostname } = new URL(url)
+            return ["diagrams.net", "draw.io"].some(
+                (domain) =>
+                    hostname === domain || hostname.endsWith(`.${domain}`),
+            )
+        } catch {
+            return false
+        }
+    }
+
+    const isWebUrl = (url: string): boolean =>
+        url.startsWith("http://") || url.startsWith("https://")
+
     // Open external links in default browser
     app.on("web-contents-created", (_, contents) => {
         contents.setWindowOpenHandler(({ url }) => {
-            // Allow diagrams.net iframe
-            if (
-                url.includes("diagrams.net") ||
-                url.includes("draw.io") ||
-                url.startsWith("http://localhost")
-            ) {
+            if (isInAppUrl(url)) {
                 return { action: "allow" }
             }
             // Open other links in external browser
-            if (url.startsWith("http://") || url.startsWith("https://")) {
+            if (isWebUrl(url)) {
                 shell.openExternal(url)
                 return { action: "deny" }
             }
             return { action: "allow" }
         })
+
+        // Clicking a plain link would otherwise replace the app page with
+        // an external site that keeps the preload API
+        contents.on("will-navigate", (event) => {
+            if (isInAppUrl(event.url)) {
+                return
+            }
+            event.preventDefault()
+            if (isWebUrl(event.url)) {
+                shell.openExternal(event.url)
+            }
+        })
     })
 }

electron/main/ipc-handlers.ts

@@ -1,16 +1,31 @@
-import { app, BrowserWindow, dialog, ipcMain } from "electron"
 import {
-    applyPresetToEnv,
+    app,
+    BrowserWindow,
+    dialog,
+    type IpcMainInvokeEvent,
+    ipcMain,
+} from "electron"
+import { rebuildAppMenu, switchPreset } from "./app-menu"
+import {
     type ConfigPreset,
     createPreset,
     deletePreset,
     getAllPresets,
     getCurrentPreset,
     getCurrentPresetId,
+    getUserLocale,
     setCurrentPreset,
+    setUserLocale,
     updatePreset,
 } from "./config-manager"
 import { restartNextServer } from "./next-server"
+import {
+    applyProxyToEnv,
+    getProxyConfig,
+    type ProxyConfig,
+    saveProxyConfig,
+} from "./proxy-manager"
+import { isAppUrl } from "./window-manager"
 
 /**
  * Allowed configuration keys for presets
@@ -39,13 +54,32 @@ function sanitizePresetConfig(
     return sanitized
 }
 
+/**
+ * Register an IPC handler that only answers the app's own pages
+ * (the main window on the app server, or the local settings page).
+ * A main window that somehow ends up on an external site still gets the
+ * preload API, so its calls must be rejected here.
+ */
+function handle<Args extends unknown[]>(
+    channel: string,
+    listener: (event: IpcMainInvokeEvent, ...args: Args) => unknown,
+): void {
+    ipcMain.handle(channel, (event, ...args) => {
+        const url = event.senderFrame?.url
+        if (!isAppUrl(url) && !url?.startsWith("file://")) {
+            throw new Error(`Blocked "${channel}" from untrusted page: ${url}`)
+        }
+        return listener(event, ...(args as Args))
+    })
+}
+
 /**
  * Register all IPC handlers
  */
 export function registerIpcHandlers(): void {
     // ==================== App Info ====================
 
-    ipcMain.handle("get-version", () => {
+    handle("get-version", () => {
         return app.getVersion()
     })
 
@@ -72,7 +106,7 @@ export function registerIpcHandlers(): void {
 
     // ==================== File Dialogs ====================
 
-    ipcMain.handle("dialog-open-file", async (event) => {
+    handle("dialog-open-file", async (event) => {
         const win = BrowserWindow.fromWebContents(event.sender)
         if (!win) return null
 
@@ -99,9 +133,9 @@ export function registerIpcHandlers(): void {
         }
     })
 
-    ipcMain.handle("dialog-save-file", async (event, data: string) => {
+    handle("dialog-save-file", async (event, data: string) => {
         const win = BrowserWindow.fromWebContents(event.sender)
-        if (!win) return false
+        if (!win || typeof data !== "string") return false
 
         const result = await dialog.showSaveDialog(win, {
             filters: [
@@ -126,28 +160,28 @@ export function registerIpcHandlers(): void {
 
     // ==================== Config Presets ====================
 
-    ipcMain.handle("config-presets:get-all", () => {
+    handle("config-presets:get-all", () => {
         return getAllPresets()
     })
 
-    ipcMain.handle("config-presets:get-current", () => {
+    handle("config-presets:get-current", () => {
         return getCurrentPreset()
     })
 
-    ipcMain.handle("config-presets:get-current-id", () => {
+    handle("config-presets:get-current-id", () => {
         return getCurrentPresetId()
     })
 
-    ipcMain.handle(
+    handle(
         "config-presets:save",
-        (
+        async (
             _event,
             preset: Omit<ConfigPreset, "id" | "createdAt" | "updatedAt"> & {
                 id?: string
             },
         ) => {
             // Validate preset name
-            if (typeof preset.name !== "string" || !preset.name.trim()) {
+            if (typeof preset?.name !== "string" || !preset.name.trim()) {
                 throw new Error("Invalid preset name")
             }
 
@@ -156,42 +190,48 @@ export function registerIpcHandlers(): void {
 
             if (preset.id) {
                 // Update existing preset
-                return updatePreset(preset.id, {
+                const updated = updatePreset(preset.id, {
                     name: preset.name.trim(),
                     config: sanitizedConfig,
                 })
+                // Re-apply the active preset so the edit takes effect
+                if (updated && updated.id === getCurrentPresetId()) {
+                    await switchPreset(updated.id)
+                } else {
+                    rebuildAppMenu()
+                }
+                return updated
             }
             // Create new preset
-            return createPreset({
+            const created = createPreset({
                 name: preset.name.trim(),
                 config: sanitizedConfig,
             })
+            rebuildAppMenu()
+            return created
         },
     )
 
-    ipcMain.handle("config-presets:delete", (_event, id: string) => {
-        return deletePreset(id)
+    handle("config-presets:delete", async (_event, id: string) => {
+        const wasCurrent = id === getCurrentPresetId()
+        // Deleting the active preset also clears its env vars
+        const deleted = deletePreset(id)
+        rebuildAppMenu()
+
+        // Restart so the server stops using the deleted preset
+        if (deleted && wasCurrent && app.isPackaged) {
+            await restartNextServer()
+        }
+        return deleted
     })
 
-    ipcMain.handle("config-presets:apply", async (_event, id: string) => {
-        const env = applyPresetToEnv(id)
-        if (!env) {
-            return { success: false, error: "Preset not found" }
-        }
-
-        const isDev = process.env.NODE_ENV === "development"
-
-        if (isDev) {
-            // In development mode, the config file change will trigger
-            // the file watcher in electron-dev.mjs to restart Next.js
-            // We just need to save the preset (already done in applyPresetToEnv)
-            return { success: true, env, devMode: true }
-        }
-
-        // Production mode: restart the Next.js server to apply new environment variables
+    handle("config-presets:apply", async (_event, id: string) => {
         try {
-            await restartNextServer()
-            return { success: true, env }
+            const env = await switchPreset(id)
+            // In development mode, electron-dev.mjs restarts Next.js
+            return app.isPackaged
+                ? { success: true, env }
+                : { success: true, env, devMode: true }
         } catch (error) {
             return {
                 success: false,
@@ -203,10 +243,83 @@ export function registerIpcHandlers(): void {
         }
     })
 
-    ipcMain.handle(
-        "config-presets:set-current",
-        (_event, id: string | null) => {
-            return setCurrentPreset(id)
-        },
-    )
+    handle("config-presets:set-current", (_event, id: string | null) => {
+        return setCurrentPreset(id)
+    })
+
+    // ==================== Proxy Settings ====================
+
+    handle("get-proxy", () => {
+        return getProxyConfig()
+    })
+
+    handle("set-proxy", async (_event, config: ProxyConfig) => {
+        const isOptionalString = (value: unknown) =>
+            value === undefined || typeof value === "string"
+        if (
+            typeof config !== "object" ||
+            config === null ||
+            !isOptionalString(config.httpProxy) ||
+            !isOptionalString(config.httpsProxy)
+        ) {
+            return { success: false, error: "Invalid proxy settings" }
+        }
+
+        try {
+            // Save config to file
+            saveProxyConfig({
+                httpProxy: config.httpProxy,
+                httpsProxy: config.httpsProxy,
+            })
+
+            // Apply to current process environment
+            applyProxyToEnv()
+
+            if (!app.isPackaged) {
+                // In development, env vars are already applied
+                // Next.js dev server may need manual restart
+                return { success: true, devMode: true }
+            }
+
+            // Production: restart Next.js server to pick up new env vars
+            await restartNextServer()
+            return { success: true }
+        } catch (error) {
+            return {
+                success: false,
+                error:
+                    error instanceof Error
+                        ? error.message
+                        : "Failed to apply proxy settings",
+            }
+        }
+    })
+
+    // ==================== User Locale ====================
+
+    handle("get-user-locale", () => {
+        return getUserLocale()
+    })
+
+    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",
+            }
+        }
+    })
 }

electron/main/menu-i18n.ts

@@ -0,0 +1,211 @@
+/**
+ * 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)
+}

electron/main/next-server.ts

@@ -6,10 +6,22 @@ import {
     getAllocatedPort,
     getServerUrl,
     isPortAvailable,
+    saveServerPort,
 } from "./port-manager"
+import { setAppUrl } from "./window-manager"
 
 let serverProcess: UtilityProcess | null = null
 
+// Start and restart run one at a time, so overlapping calls (e.g. two quick
+// preset switches) can't leave two servers running
+let serverQueue: Promise<unknown> = Promise.resolve()
+
+function runExclusive<T>(task: () => Promise<T>): Promise<T> {
+    const result = serverQueue.then(task)
+    serverQueue = result.catch(() => {})
+    return result
+}
+
 /**
  * Get the path to the standalone server resources
  * In packaged app: resources/standalone
@@ -45,7 +57,11 @@ async function waitForServer(url: string, timeout = 30000): Promise<void> {
  * Start the Next.js standalone server using Electron's utilityProcess
  * This API is designed for running Node.js code in the background
  */
-export async function startNextServer(): Promise<string> {
+export function startNextServer(): Promise<string> {
+    return runExclusive(startServer)
+}
+
+async function startServer(): Promise<string> {
     const resourcePath = getResourcePath()
     const serverPath = path.join(resourcePath, "server.js")
 
@@ -68,7 +84,14 @@ export async function startNextServer(): Promise<string> {
     const env: Record<string, string> = {
         NODE_ENV: "production",
         PORT: String(port),
-        HOSTNAME: "localhost",
+        HOSTNAME: "127.0.0.1",
+        // Enable Node.js built-in proxy support for fetch (Node.js 24+)
+        NODE_USE_ENV_PROXY: "1",
+    }
+
+    // Keep requests to local model servers (e.g. Ollama) off the proxy
+    if (!process.env.NO_PROXY && !process.env.no_proxy) {
+        env.NO_PROXY = "localhost,127.0.0.1,[::1]"
     }
 
     // Set cache directory to a writable location (user's app data folder)
@@ -85,43 +108,80 @@ export async function startNextServer(): Promise<string> {
         }
     }
 
+    // Debug: log proxy-related env vars
+    console.log("Proxy env vars being passed to server:", {
+        HTTP_PROXY: env.HTTP_PROXY || env.http_proxy || "not set",
+        HTTPS_PROXY: env.HTTPS_PROXY || env.https_proxy || "not set",
+        NODE_USE_ENV_PROXY: env.NODE_USE_ENV_PROXY || "not set",
+    })
+
     // Use Electron's utilityProcess API for running Node.js in background
     // This is the recommended way to run Node.js code in Electron
-    serverProcess = utilityProcess.fork(serverPath, [], {
+    const proc = utilityProcess.fork(serverPath, [], {
         cwd: resourcePath,
         env,
         stdio: "pipe",
     })
+    serverProcess = proc
 
-    serverProcess.stdout?.on("data", (data) => {
+    proc.stdout?.on("data", (data) => {
         console.log(`[Next.js] ${data.toString().trim()}`)
     })
 
-    serverProcess.stderr?.on("data", (data) => {
+    proc.stderr?.on("data", (data) => {
         console.error(`[Next.js Error] ${data.toString().trim()}`)
     })
 
-    serverProcess.on("exit", (code) => {
+    proc.on("exit", (code) => {
         console.log(`Next.js server exited with code ${code}`)
-        serverProcess = null
+        // An old server can exit after a new one started; keep the new one
+        if (serverProcess === proc) {
+            serverProcess = null
+        }
     })
 
     const url = getServerUrl()
     await waitForServer(url)
     console.log(`Next.js server started at ${url}`)
+    saveServerPort(port)
 
     return url
 }
 
 /**
- * Stop the Next.js server process
+ * Stop the Next.js server process and wait for it to exit
  */
-export function stopNextServer(): void {
-    if (serverProcess) {
-        console.log("Stopping Next.js server...")
-        serverProcess.kill()
-        serverProcess = null
+export async function stopNextServer(): Promise<void> {
+    const proc = serverProcess
+    if (!proc) {
+        return
     }
+    console.log("Stopping Next.js server...")
+    serverProcess = null
+
+    // Resolves true when the process exits, false after the timeout
+    const waitForExit = (ms: number) =>
+        new Promise<boolean>((resolve) => {
+            proc.once("exit", () => resolve(true))
+            setTimeout(() => resolve(false), ms)
+        })
+
+    proc.kill()
+
+    // Next.js waits for open requests (e.g. a streaming reply) before it
+    // exits, so force kill it if it is still running after 5 seconds
+    if (!(await waitForExit(5000)) && proc.pid) {
+        console.warn("Next.js server did not exit in time, force killing it")
+        try {
+            process.kill(proc.pid, "SIGKILL")
+        } catch (error) {
+            console.error("Failed to force kill Next.js server:", error)
+        }
+        await waitForExit(2000)
+    }
+
+    // Additional wait for OS to release port
+    await new Promise((resolve) => setTimeout(resolve, 500))
 }
 
 /**
@@ -147,15 +207,19 @@ async function waitForServerStop(timeout = 5000): Promise<void> {
 /**
  * Restart the Next.js server with new environment variables
  */
-export async function restartNextServer(): Promise<string> {
-    console.log("Restarting Next.js server...")
+export function restartNextServer(): Promise<string> {
+    return runExclusive(async () => {
+        console.log("Restarting Next.js server...")
 
-    // Stop the current server
-    stopNextServer()
+        // Stop the current server and wait for it to exit
+        await stopNextServer()
 
-    // Wait for the port to be released
-    await waitForServerStop()
+        // Wait for the port to be released
+        await waitForServerStop()
 
-    // Start the server again
-    return startNextServer()
+        // Start the server again, and follow it if it moved to another port
+        const url = await startServer()
+        setAppUrl(url)
+        return url
+    })
 }

electron/main/port-manager.ts

@@ -1,4 +1,6 @@
+import { readFileSync, writeFileSync } from "node:fs"
 import net from "node:net"
+import path from "node:path"
 import { app } from "electron"
 
 /**
@@ -9,9 +11,11 @@ import { app } from "electron"
 const PORT_CONFIG = {
     // Development mode uses fixed port for hot reload compatibility
     development: 6002,
-    // Production mode uses fixed port (61337) to preserve localStorage
-    // Falls back to sequential ports if unavailable
-    production: 61337,
+    // 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,
     // Maximum attempts to find an available port (fallback)
     maxAttempts: 100,
 }
@@ -21,13 +25,48 @@ const PORT_CONFIG = {
  */
 let allocatedPort: number | null = null
 
+/**
+ * File that remembers the production port from the last launch, so the app
+ * keeps the same origin (and its localStorage) instead of switching between
+ * the legacy and new port depending on which one is free at startup
+ */
+function getSavedPortPath(): string {
+    return path.join(app.getPath("userData"), "server-port.json")
+}
+
+function loadSavedPort(): number | null {
+    try {
+        const { port } = JSON.parse(readFileSync(getSavedPortPath(), "utf-8"))
+        return Number.isInteger(port) ? port : null
+    } catch {
+        return null
+    }
+}
+
+/**
+ * Remember the port the production server started on
+ */
+export function saveServerPort(port: number): void {
+    if (!app.isPackaged || port === loadSavedPort()) {
+        return
+    }
+    try {
+        writeFileSync(getSavedPortPath(), JSON.stringify({ port }), "utf-8")
+    } catch (error) {
+        console.error("Failed to save server port:", error)
+    }
+}
+
 /**
  * Check if a specific port is available
  */
 export function isPortAvailable(port: number): Promise<boolean> {
     return new Promise((resolve) => {
         const server = net.createServer()
-        server.once("error", () => resolve(false))
+        server.once("error", (err: NodeJS.ErrnoException) => {
+            console.warn(`Port ${port} unavailable: ${err.code}`)
+            resolve(false)
+        })
         server.once("listening", () => {
             server.close()
             resolve(true)
@@ -39,12 +78,13 @@ export function isPortAvailable(port: number): Promise<boolean> {
 /**
  * Find an available port
  * - In development: uses fixed port (6002)
- * - In production: uses fixed port (61337) to preserve localStorage
+ * - In production: uses the port from the last launch, then the legacy
+ *   port (61337), then 13370, 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
@@ -64,7 +104,30 @@ export async function findAvailablePort(reuseExisting = true): Promise<number> {
         allocatedPort = null
     }
 
-    // Try preferred port first
+    // In production, use the port from the last launch first
+    if (!isDev) {
+        const savedPort = loadSavedPort()
+        if (savedPort !== null) {
+            if (await isPortAvailable(savedPort)) {
+                allocatedPort = savedPort
+                return savedPort
+            }
+            console.warn(
+                `Port ${savedPort} from the last launch is unavailable. Data saved under it will not show on the new port.`,
+            )
+        }
+    }
+
+    // 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
     if (await isPortAvailable(preferredPort)) {
         allocatedPort = preferredPort
         return preferredPort
@@ -84,9 +147,23 @@ export async function findAvailablePort(reuseExisting = true): Promise<number> {
         }
     }
 
-    throw new Error(
-        `Failed to find available port after ${PORT_CONFIG.maxAttempts} attempts`,
+    // 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).",
     )
+    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
 }
 
 /**
@@ -113,5 +190,5 @@ export function getServerUrl(): string {
             "No port allocated yet. Call findAvailablePort() first.",
         )
     }
-    return `http://localhost:${allocatedPort}`
+    return `http://127.0.0.1:${allocatedPort}`
 }

electron/main/proxy-manager.ts

@@ -0,0 +1,88 @@
+import { app } from "electron"
+import * as fs from "fs"
+import * as path from "path"
+import type { ProxyConfig } from "../electron.d"
+
+export type { ProxyConfig }
+
+const CONFIG_FILE = "proxy-config.json"
+
+function getConfigPath(): string {
+    return path.join(app.getPath("userData"), CONFIG_FILE)
+}
+
+/**
+ * Load proxy configuration from JSON file
+ * Returns null if the user never saved proxy settings (or the file is invalid)
+ */
+export function loadProxyConfig(): ProxyConfig | null {
+    try {
+        const configPath = getConfigPath()
+        if (fs.existsSync(configPath)) {
+            const data = JSON.parse(fs.readFileSync(configPath, "utf-8"))
+            if (data && typeof data === "object" && !Array.isArray(data)) {
+                return data as ProxyConfig
+            }
+            console.error("Ignoring invalid proxy config:", data)
+        }
+    } catch (error) {
+        console.error("Failed to load proxy config:", error)
+    }
+    return null
+}
+
+/**
+ * Save proxy configuration to JSON file
+ */
+export function saveProxyConfig(config: ProxyConfig): void {
+    try {
+        const configPath = getConfigPath()
+        // Write a temp file and rename it, so a crash mid-write can't leave
+        // a truncated file
+        const tempPath = `${configPath}.tmp`
+        fs.writeFileSync(tempPath, JSON.stringify(config, null, 2), "utf-8")
+        fs.renameSync(tempPath, configPath)
+    } catch (error) {
+        console.error("Failed to save proxy config:", error)
+        throw error
+    }
+}
+
+/**
+ * Apply proxy configuration to process.env
+ * Must be called BEFORE starting the Next.js server
+ */
+export function applyProxyToEnv(): void {
+    const config = loadProxyConfig()
+
+    // No saved settings: keep proxy vars inherited from the system or .env
+    if (!config) {
+        return
+    }
+
+    if (config.httpProxy) {
+        process.env.HTTP_PROXY = config.httpProxy
+        process.env.http_proxy = config.httpProxy
+    } else {
+        delete process.env.HTTP_PROXY
+        delete process.env.http_proxy
+    }
+
+    if (config.httpsProxy) {
+        process.env.HTTPS_PROXY = config.httpsProxy
+        process.env.https_proxy = config.httpsProxy
+    } else {
+        delete process.env.HTTPS_PROXY
+        delete process.env.https_proxy
+    }
+}
+
+/**
+ * Get current proxy configuration (from process.env)
+ */
+export function getProxyConfig(): ProxyConfig {
+    return {
+        httpProxy: process.env.HTTP_PROXY || process.env.http_proxy || "",
+        httpsProxy: process.env.HTTPS_PROXY || process.env.https_proxy || "",
+    }
+}

electron/main/window-manager.ts

@@ -3,6 +3,9 @@ import { app, BrowserWindow, screen } from "electron"
 
 let mainWindow: BrowserWindow | null = null
 
+// URL of the app server the main window loads
+let appUrl: string | null = null
+
 /**
  * Get the icon path based on platform
  * Note: electron-builder converts icon.png during packaging,
@@ -28,6 +31,7 @@ function getIconPath(): string | undefined {
  * Create the main application window
  */
 export function createWindow(serverUrl: string): BrowserWindow {
+    appUrl = serverUrl
     const { width, height } = screen.getPrimaryDisplay().workAreaSize
 
     mainWindow = new BrowserWindow({
@@ -56,17 +60,28 @@ export function createWindow(serverUrl: string): BrowserWindow {
     })
 
     // Open DevTools in development
-    if (process.env.NODE_ENV === "development") {
+    if (!app.isPackaged) {
         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")) {
+        if (
+            title &&
+            !title.includes("localhost") &&
+            !title.includes("127.0.0.1")
+        ) {
             mainWindow?.setTitle(title)
         } else {
             event.preventDefault()
@@ -82,3 +97,36 @@ export function createWindow(serverUrl: string): BrowserWindow {
 export function getMainWindow(): BrowserWindow | null {
     return mainWindow
 }
+
+/**
+ * Get the app server URL the main window loads
+ */
+export function getAppUrl(): string | null {
+    return appUrl
+}
+
+/**
+ * Point the main window at a new app server URL
+ * (the restarted server can come up on a different port)
+ */
+export function setAppUrl(url: string): void {
+    if (url === appUrl) {
+        return
+    }
+    appUrl = url
+    mainWindow?.loadURL(url)
+}
+
+/**
+ * Check if a URL belongs to the app server (same origin)
+ */
+export function isAppUrl(url: string | undefined): boolean {
+    if (!url || !appUrl) {
+        return false
+    }
+    try {
+        return new URL(url).origin === new URL(appUrl).origin
+    } catch {
+        return false
+    }
+}

electron/preload/index.ts

@@ -21,4 +21,14 @@ contextBridge.exposeInMainWorld("electronAPI", {
     // File operations
     openFile: () => ipcRenderer.invoke("dialog-open-file"),
     saveFile: (data: string) => ipcRenderer.invoke("dialog-save-file", data),
+
+    // Proxy settings
+    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),
 })

electron/settings/index.html

@@ -55,6 +55,7 @@
                             <option value="openrouter">OpenRouter</option>
                             <option value="deepseek">DeepSeek</option>
                             <option value="siliconflow">SiliconFlow</option>
+                            <option value="modelscope">ModelScope</option>
                             <option value="ollama">Ollama (Local)</option>
                         </select>
                     </div>

electron/settings/settings.js

@@ -213,6 +213,9 @@ async function savePreset() {
         }
     })
 
+    // closeModal() clears editingPresetId, so remember it for the toast
+    const isEdit = Boolean(editingPresetId)
+
     try {
         saveBtn.disabled = true
         saveBtn.innerHTML = '<span class="loading"></span>'
@@ -220,10 +223,7 @@ async function savePreset() {
         await window.settingsAPI.savePreset(preset)
         await loadPresets()
         closeModal()
-        showToast(
-            editingPresetId ? "Preset updated" : "Preset created",
-            "success",
-        )
+        showToast(isEdit ? "Preset updated" : "Preset created", "success")
     } catch (error) {
         console.error("Failed to save preset:", error)
         showToast("Failed to save preset", "error")
@@ -265,8 +265,6 @@ async function applyPreset(id) {
 
         const result = await window.settingsAPI.applyPreset(id)
         if (result.success) {
-            currentPresetId = id
-            renderPresets()
             showToast("Preset applied, server restarting...", "success")
         } else {
             showToast(result.error || "Failed to apply preset", "error")
@@ -274,6 +272,9 @@ async function applyPreset(id) {
     } catch (error) {
         console.error("Failed to apply preset:", error)
         showToast("Failed to apply preset", "error")
+    } finally {
+        // Reload to show the active preset and reset the Apply button
+        await loadPresets()
     }
 }
 
@@ -288,6 +289,7 @@ function getProviderLabel(provider) {
         openrouter: "OpenRouter",
         deepseek: "DeepSeek",
         siliconflow: "SiliconFlow",
+        modelscope: "ModelScope",
         ollama: "Ollama",
     }
     return labels[provider] || provider

env.example

@@ -1,12 +1,22 @@
 # AI Provider Configuration
 # AI_PROVIDER: Which provider to use
-# Options: bedrock, openai, anthropic, google, azure, ollama, openrouter, deepseek, siliconflow, gateway
+# Options: bedrock, openai, anthropic, google, vertexai, azure, ollama, openrouter, aihubmix, deepseek, siliconflow, gateway, novita
 # 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
 
+# Output limit, all providers (default: 64000). Shared by reasoning and the diagram XML,
+# so a thinking model can spend it all before the tool call. Users can lower it in Settings,
+# and raise it only when they use their own API key, so this also caps cost on server keys.
+# If a model's own ceiling is lower, the request is retried with that ceiling automatically.
+# MAX_OUTPUT_TOKENS=64000
+
 # AWS Bedrock Configuration
 # AWS_REGION=us-east-1
 # AWS_ACCESS_KEY_ID=your-access-key-id
@@ -25,7 +35,8 @@ 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-...
+# 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_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
@@ -40,6 +51,14 @@ 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}
@@ -51,14 +70,19 @@ 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 (Local) Configuration
-# OLLAMA_BASE_URL=http://localhost:11434/api  # Optional, defaults to localhost
+# 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_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
@@ -72,6 +96,10 @@ AI_MODEL=global.anthropic.claude-sonnet-4-5-20250929-v1:0
 # SGLANG_API_KEY=your-sglang-api-key
 # SGLANG_BASE_URL=http://127.0.0.1:8000/v1  # Your SGLang endpoint
 
+# ModelScope Configuration
+# MODELSCOPE_API_KEY=ms-...
+# MODELSCOPE_BASE_URL=https://api-inference.modelscope.cn/v1  # Optional: Custom endpoint
+
 # ByteDance Doubao Configuration (via Volcengine)
 # DOUBAO_API_KEY=your-doubao-api-key
 # DOUBAO_BASE_URL=https://ark.cn-beijing.volces.com/api/v3  # ByteDance Volcengine endpoint
@@ -89,6 +117,11 @@ 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)
@@ -97,6 +130,14 @@ 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
@@ -112,3 +153,55 @@ 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.

hooks/use-diagram-tool-handlers.ts

@@ -1,4 +1,11 @@
 import type { MutableRefObject } from "react"
+import type { DiagramOperation } from "@/components/chat/types"
+import type {
+    ValidationState,
+    ValidationStatus,
+} from "@/components/chat/ValidationCard"
+import type { ValidationResult } from "@/lib/diagram-validator"
+import { formatValidationFeedback } from "@/lib/diagram-validator"
 import { isMxCellXmlComplete, wrapWithMxFile } from "@/lib/utils"
 
 const DEBUG = process.env.NODE_ENV === "development"
@@ -29,19 +36,31 @@ type AddToolOutputParams = AddToolOutputSuccess | AddToolOutputError
 
 type AddToolOutputFn = (params: AddToolOutputParams) => void
 
-interface DiagramOperation {
-    operation: "update" | "add" | "delete"
-    cell_id: string
-    new_xml?: string
-}
+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>>
+    // Failed VLM validations in the current user turn (reset on each user message)
+    validationRetryCountRef: MutableRefObject<number>
     chartXMLRef: MutableRefObject<string>
     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
 }
 
 /**
@@ -54,11 +73,36 @@ interface UseDiagramToolHandlersParams {
 export function useDiagramToolHandlers({
     partialXmlRef,
     editDiagramOriginalXmlRef,
+    validationRetryCountRef,
     chartXMLRef,
     onDisplayChart,
     onFetchChart,
     onExport,
+    captureValidationPng,
+    validateDiagram,
+    enableVlmValidation = true,
+    sessionId,
+    onValidationStateChange,
 }: UseDiagramToolHandlersParams) {
+    // 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,
@@ -160,7 +204,150 @@ ${finalXml}
             // Success - diagram will be rendered by chat-message-display
             if (DEBUG) {
                 console.log(
-                    "[display_diagram] Success! Adding tool output with state: output-available",
+                    "[display_diagram] Success! Checking if VLM validation is enabled...",
+                )
+            }
+
+            // VLM validation after successful display
+            if (
+                enableVlmValidation &&
+                captureValidationPng &&
+                validateDiagram
+            ) {
+                let capturedPngData: string | null = null
+                try {
+                    // Notify UI that we're starting capture
+                    updateValidationState(toolCall.toolCallId, "capturing")
+
+                    // Small delay (100ms) to allow diagram rendering to complete before capture.
+                    // This is a best-effort heuristic and may need adjustment for complex diagrams or slower devices.
+                    await new Promise((resolve) => setTimeout(resolve, 100))
+
+                    capturedPngData = await captureValidationPng()
+                    if (capturedPngData) {
+                        if (DEBUG) {
+                            console.log(
+                                "[display_diagram] Captured PNG for validation",
+                            )
+                        }
+
+                        // Each retry is a new tool call, so count attempts per user turn
+                        const attempt = validationRetryCountRef.current + 1
+
+                        // Notify UI that we're validating (include the image)
+                        updateValidationState(
+                            toolCall.toolCallId,
+                            "validating",
+                            {
+                                attempt,
+                                maxAttempts: MAX_VALIDATION_RETRIES,
+                                imageData: capturedPngData,
+                            },
+                        )
+
+                        const result = await validateDiagram(
+                            capturedPngData,
+                            sessionId,
+                        )
+
+                        if (!result.valid) {
+                            if (attempt < MAX_VALIDATION_RETRIES) {
+                                validationRetryCountRef.current = attempt
+
+                                const feedback =
+                                    formatValidationFeedback(result)
+                                if (DEBUG) {
+                                    console.log(
+                                        `[display_diagram] Validation failed (attempt ${attempt}/${MAX_VALIDATION_RETRIES}):`,
+                                        result.issues,
+                                    )
+                                }
+
+                                // Notify UI of validation failure (include the image)
+                                updateValidationState(
+                                    toolCall.toolCallId,
+                                    "failed",
+                                    {
+                                        attempt,
+                                        maxAttempts: MAX_VALIDATION_RETRIES,
+                                        result,
+                                        imageData: capturedPngData,
+                                    },
+                                )
+
+                                addToolOutput({
+                                    tool: "display_diagram",
+                                    toolCallId: toolCall.toolCallId,
+                                    state: "output-error",
+                                    errorText: `[Validation attempt ${attempt}/${MAX_VALIDATION_RETRIES}]\n${feedback}`,
+                                })
+                                return
+                            } else {
+                                // Last attempt - accept the diagram with warning
+                                if (DEBUG) {
+                                    console.log(
+                                        "[display_diagram] Max validation retries reached, accepting diagram",
+                                    )
+                                }
+                                validationRetryCountRef.current = 0
+
+                                // Notify UI that we're accepting with issues (include the image)
+                                updateValidationState(
+                                    toolCall.toolCallId,
+                                    "skipped",
+                                    { result, imageData: capturedPngData },
+                                )
+
+                                addToolOutput({
+                                    tool: "display_diagram",
+                                    toolCallId: toolCall.toolCallId,
+                                    output: "Diagram displayed (validation issues noted but max retries reached).",
+                                })
+                                return
+                            }
+                        } else {
+                            // Validation passed - reset retry count
+                            validationRetryCountRef.current = 0
+                            if (DEBUG) {
+                                console.log(
+                                    "[display_diagram] Validation passed!",
+                                )
+                            }
+
+                            // Notify UI of success (include the image)
+                            // Use "success_with_warnings" if valid but has issues
+                            const hasWarnings = result.issues.length > 0
+                            updateValidationState(
+                                toolCall.toolCallId,
+                                hasWarnings
+                                    ? "success_with_warnings"
+                                    : "success",
+                                { result, imageData: capturedPngData },
+                            )
+                        }
+                    } else {
+                        // PNG capture failed - skip validation
+                        updateValidationState(toolCall.toolCallId, "skipped")
+                    }
+                } catch (error) {
+                    // VLM validation error - log but don't block the user
+                    console.warn(
+                        "[display_diagram] VLM validation error:",
+                        error,
+                    )
+                    updateValidationState(toolCall.toolCallId, "error", {
+                        error:
+                            error instanceof Error
+                                ? error.message
+                                : "Validation failed",
+                        imageData: capturedPngData || undefined,
+                    })
+                }
+            }
+
+            if (DEBUG) {
+                console.log(
+                    "[display_diagram] Adding tool output with state: output-available",
                 )
             }
             addToolOutput({
@@ -185,12 +372,17 @@ ${finalXml}
         }
 
         let currentXml = ""
+        // Use the original XML captured during streaming (shared with chat-message-display)
+        // This ensures we apply operations to the same base XML that streaming used
+        const originalXml = editDiagramOriginalXmlRef.current.get(
+            toolCall.toolCallId,
+        )
+        // On failure, undo the streaming preview so the canvas matches the XML
+        // reported back to the model
+        const restoreOriginal = () => {
+            if (originalXml) onDisplayChart(originalXml, true)
+        }
         try {
-            // Use the original XML captured during streaming (shared with chat-message-display)
-            // This ensures we apply operations to the same base XML that streaming used
-            const originalXml = editDiagramOriginalXmlRef.current.get(
-                toolCall.toolCallId,
-            )
             if (originalXml) {
                 currentXml = originalXml
             } else {
@@ -219,6 +411,7 @@ ${finalXml}
                     )
                     .join("\n")
 
+                restoreOriginal()
                 addToolOutput({
                     tool: "edit_diagram",
                     toolCallId: toolCall.toolCallId,
@@ -244,6 +437,7 @@ Please check the cell IDs and retry.`,
                     "[edit_diagram] Validation error:",
                     validationError,
                 )
+                restoreOriginal()
                 addToolOutput({
                     tool: "edit_diagram",
                     toolCallId: toolCall.toolCallId,
@@ -275,6 +469,7 @@ Please fix the operations to avoid structural issues.`,
             const errorMessage =
                 error instanceof Error ? error.message : String(error)
 
+            restoreOriginal()
             addToolOutput({
                 tool: "edit_diagram",
                 toolCallId: toolCall.toolCallId,
@@ -299,6 +494,19 @@ Please check cell IDs and retry, or use display_diagram to regenerate.`,
     ) => {
         const { xml } = toolCall.input as { xml: string }
 
+        // Nothing to continue: loading the fragment alone would replace the whole diagram
+        if (!partialXmlRef.current) {
+            addToolOutput({
+                tool: "append_diagram",
+                toolCallId: toolCall.toolCallId,
+                state: "output-error",
+                errorText: `ERROR: There is no truncated diagram to continue, so append_diagram cannot be used now.
+
+Use display_diagram to create the complete diagram, or edit_diagram to change the current one.`,
+            })
+            return
+        }
+
         // 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()

hooks/use-model-config.ts

@@ -1,6 +1,8 @@
 "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,
@@ -99,6 +101,15 @@ function saveConfig(config: MultiModelConfig): void {
     localStorage.setItem(STORAGE_KEYS.modelConfigs, JSON.stringify(config))
 }
 
+/**
+ * Server model to fall back to: the one marked default, else the first one
+ */
+function defaultServerModelId(
+    serverModels: FlattenedServerModel[],
+): string | undefined {
+    return (serverModels.find((m) => m.isDefault) ?? serverModels[0])?.id
+}
+
 export interface UseModelConfigReturn {
     // State
     config: MultiModelConfig
@@ -132,14 +143,67 @@ 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 config on mount
+    // Load client config on mount
     useEffect(() => {
         const loaded = loadConfig()
         setConfig(loaded)
         setIsLoaded(true)
     }, [])
 
+    // Pick up config changes saved by other tabs, so this tab neither shows a
+    // stale model nor overwrites their changes on its next save
+    useEffect(() => {
+        const handleStorage = (e: StorageEvent) => {
+            if (e.key === STORAGE_KEYS.modelConfigs) setConfig(loadConfig())
+        }
+        window.addEventListener("storage", handleStorage)
+        return () => window.removeEventListener("storage", handleStorage)
+    }, [])
+
+    // 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 the default server model if no model is selected,
+                // or if the saved server model is gone (renamed or removed)
+                setConfig((prev) => {
+                    const id = prev.selectedModelId
+                    const isStale =
+                        id?.startsWith("server:") &&
+                        !raw.some((m) => m.id === id)
+                    if (id && !isStale) return prev
+                    const fallback = defaultServerModelId(raw)
+                    return fallback === id
+                        ? prev
+                        : { ...prev, selectedModelId: fallback }
+                })
+            })
+            .catch((error) => {
+                console.error("Error while loading server models:", error)
+                setServerLoaded(true)
+            })
+    }, [])
+
     // Save config whenever it changes (after initial load)
     useEffect(() => {
         if (isLoaded) {
@@ -148,9 +212,33 @@ export function useModelConfig(): UseModelConfigReturn {
     }, [config, isLoaded])
 
     // Derived state
-    const models = flattenModels(config)
+    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 selectedModel = config.selectedModelId
-        ? findModelById(config, config.selectedModelId)
+        ? models.find((m) => m.id === config.selectedModelId)
         : undefined
 
     // Actions
@@ -192,24 +280,31 @@ export function useModelConfig(): UseModelConfigReturn {
         [],
     )
 
-    const deleteProvider = useCallback((providerId: string) => {
-        setConfig((prev) => {
-            const provider = prev.providers.find((p) => p.id === providerId)
-            const modelIds = provider?.models.map((m) => m.id) || []
+    const deleteProvider = useCallback(
+        (providerId: string) => {
+            setConfig((prev) => {
+                const provider = prev.providers.find((p) => p.id === providerId)
+                const modelIds = provider?.models.map((m) => m.id) || []
 
-            // Clear selected model if it belongs to deleted provider
-            const newSelectedId =
-                prev.selectedModelId && modelIds.includes(prev.selectedModelId)
-                    ? undefined
-                    : prev.selectedModelId
+                // Fall back to the default server model if the selected model
+                // belongs to the deleted provider
+                const newSelectedId =
+                    prev.selectedModelId &&
+                    modelIds.includes(prev.selectedModelId)
+                        ? defaultServerModelId(serverModels)
+                        : prev.selectedModelId
 
-            return {
-                ...prev,
-                providers: prev.providers.filter((p) => p.id !== providerId),
-                selectedModelId: newSelectedId,
-            }
-        })
-    }, [])
+                return {
+                    ...prev,
+                    providers: prev.providers.filter(
+                        (p) => p.id !== providerId,
+                    ),
+                    selectedModelId: newSelectedId,
+                }
+            })
+        },
+        [serverModels],
+    )
 
     const addModel = useCallback(
         (providerId: string, modelId: string): ModelConfig => {
@@ -266,14 +361,15 @@ export function useModelConfig(): UseModelConfigReturn {
                           }
                         : p,
                 ),
-                // Clear selected model if it was deleted
+                // Fall back to the default server model if the selected model
+                // was deleted
                 selectedModelId:
                     prev.selectedModelId === modelConfigId
-                        ? undefined
+                        ? defaultServerModelId(serverModels)
                         : prev.selectedModelId,
             }))
         },
-        [],
+        [serverModels],
     )
 
     const resetConfig = useCallback(() => {
@@ -282,7 +378,7 @@ export function useModelConfig(): UseModelConfigReturn {
 
     return {
         config,
-        isLoaded,
+        isLoaded: isLoaded && serverLoaded,
         models,
         selectedModel,
         selectedModelId: config.selectedModelId,
@@ -314,6 +410,10 @@ 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: "",
@@ -325,6 +425,8 @@ export function getSelectedAIConfig(): {
         awsSecretAccessKey: "",
         awsRegion: "",
         awsSessionToken: "",
+        selectedModelId: "",
+        vertexApiKey: "",
     }
 
     if (typeof window === "undefined") return empty
@@ -347,6 +449,8 @@ export function getSelectedAIConfig(): {
             awsSecretAccessKey: "",
             awsRegion: "",
             awsSessionToken: "",
+            selectedModelId: "",
+            vertexApiKey: "",
         }
     }
 
@@ -357,12 +461,32 @@ export function getSelectedAIConfig(): {
         return { ...empty, accessCode }
     }
 
-    // No selected model = use server default
+    // No selected model = use server default (AI_PROVIDER/AI_MODEL/env auto-detect)
     if (!config.selectedModelId) {
         return { ...empty, accessCode }
     }
 
-    // Find selected model
+    // 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
     const model = findModelById(config, config.selectedModelId)
     if (!model) {
         return { ...empty, accessCode }
@@ -379,5 +503,8 @@ export function getSelectedAIConfig(): {
         awsSecretAccessKey: model.awsSecretAccessKey || "",
         awsRegion: model.awsRegion || "",
         awsSessionToken: model.awsSessionToken || "",
+        selectedModelId: config.selectedModelId || "",
+        // Vertex AI credentials (Express Mode)
+        vertexApiKey: model.vertexApiKey || "",
     }
 }

hooks/use-session-manager.ts

@@ -1,6 +1,8 @@
 "use client"
 
 import { useCallback, useEffect, useRef, useState } from "react"
+import { toast } from "sonner"
+import { useDictionary } from "@/hooks/use-dictionary"
 import {
     type ChatSession,
     createEmptySession,
@@ -44,6 +46,15 @@ export interface UseSessionManagerReturn {
     clearCurrentSession: () => void
 }
 
+// Reading the session list loads every stored session in full, and window
+// focus also fires each time the user clicks back from the draw.io iframe
+const FOCUS_REFRESH_INTERVAL_MS = 30_000
+
+function notifySaveFailed(message: string) {
+    // Same id, so repeated failures update one toast instead of stacking
+    toast.error(message, { id: "session-save-failed", duration: 8000 })
+}
+
 interface UseSessionManagerOptions {
     /** Session ID from URL param - if provided, load this session; if null, start blank */
     initialSessionId?: string | null
@@ -53,6 +64,7 @@ export function useSessionManager(
     options: UseSessionManagerOptions = {},
 ): UseSessionManagerReturn {
     const { initialSessionId } = options
+    const dict = useDictionary()
     const [sessions, setSessions] = useState<SessionMetadata[]>([])
     const [currentSessionId, setCurrentSessionId] = useState<string | null>(
         null,
@@ -163,9 +175,15 @@ export function useSessionManager(
         handleSessionIdChange()
     }, [initialSessionId, isAvailable])
 
-    // Refresh sessions on window focus (multi-tab sync)
+    // Refresh sessions on window focus (multi-tab sync), at most once per interval
+    const lastFocusRefreshRef = useRef(0)
     useEffect(() => {
         const handleFocus = () => {
+            const now = Date.now()
+            if (now - lastFocusRefreshRef.current < FOCUS_REFRESH_INTERVAL_MS) {
+                return
+            }
+            lastFocusRefreshRef.current = now
             refreshSessions()
         }
         window.addEventListener("focus", handleFocus)
@@ -238,6 +256,8 @@ export function useSessionManager(
             ) {
                 return
             }
+            // Nothing can be stored without IndexedDB
+            if (!isIndexedDBAvailable()) return
 
             if (!currentSession) {
                 // Create a new session if none exists
@@ -250,7 +270,12 @@ export function useSessionManager(
                     diagramHistory: data.diagramHistory,
                     title: extractTitle(data.messages),
                 }
-                await saveSession(newSession)
+                // Without a stored session, keep no session id (it would end
+                // up in the URL and point to nothing after a reload)
+                if (!(await saveSession(newSession))) {
+                    notifySaveFailed(dict.errors.sessionSaveFailed)
+                    return
+                }
                 await enforceSessionLimit()
                 setCurrentSession(newSession)
                 setCurrentSessionId(newSession.id)
@@ -277,7 +302,10 @@ export function useSessionManager(
                         : currentSession.title,
             }
 
-            await saveSession(updatedSession)
+            if (!(await saveSession(updatedSession))) {
+                notifySaveFailed(dict.errors.sessionSaveFailed)
+                return
+            }
             setCurrentSession(updatedSession)
 
             // Update sessions list metadata
@@ -298,7 +326,7 @@ export function useSessionManager(
                 ),
             )
         },
-        [currentSession, currentSessionId, refreshSessions],
+        [currentSession, currentSessionId, refreshSessions, dict],
     )
 
     // Clear current session state (for starting fresh without loading another session)

hooks/use-validate-diagram.ts

@@ -0,0 +1,139 @@
+"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 { getSelectedAIConfig } from "@/hooks/use-model-config"
+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,
+        // Resolved per request so a changed access code is picked up
+        headers: () => ({ "x-access-code": getSelectedAIConfig().accessCode }),
+        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,
+    }
+}

instrumentation.ts

@@ -1,7 +1,17 @@
 import { LangfuseSpanProcessor } from "@langfuse/otel"
 import { NodeTracerProvider } from "@opentelemetry/sdk-trace-node"
 
-export function register() {
+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)
+        }
+    }
+
     // Skip telemetry if Langfuse env vars are not configured
     if (!process.env.LANGFUSE_PUBLIC_KEY || !process.env.LANGFUSE_SECRET_KEY) {
         console.warn(

lib/access-code.ts

@@ -0,0 +1,22 @@
+/**
+ * Check the x-access-code header against ACCESS_CODE_LIST.
+ * Returns a 401 response to send back when the check fails, or null when the
+ * request may continue (including when no access codes are configured).
+ */
+export function checkAccessCode(req: Request): Response | null {
+    const accessCodes =
+        process.env.ACCESS_CODE_LIST?.split(",")
+            .map((code) => code.trim())
+            .filter(Boolean) || []
+    if (accessCodes.length === 0) return null
+
+    const accessCodeHeader = req.headers.get("x-access-code")
+    if (accessCodeHeader && accessCodes.includes(accessCodeHeader)) return null
+
+    return Response.json(
+        {
+            error: "Invalid or missing access code. Please configure it in Settings.",
+        },
+        { status: 401 },
+    )
+}

lib/admin/auth.ts

@@ -0,0 +1,37 @@
+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)}` : "••••",
+    }
+}

lib/admin/providers.ts

@@ -0,0 +1,315 @@
+import { z } from "zod"
+import {
+    ProviderNameSchema,
+    type ServerModelsConfig,
+    slugify,
+} 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.`
+        }
+    }
+    // Server model ids are built from the slugified name, so names must
+    // stay distinct after slugifying ("OpenAI" and "openai" would collide)
+    const names = list.map((p) => displayName(p))
+    const slugs = names.map(slugify)
+    if (new Set(slugs).size !== slugs.length) {
+        return "Provider display names must be unique (ignoring case and punctuation)."
+    }
+    const envSlugs = new Set(envProviders.map((p) => slugify(p.name)))
+    const clash = names.find((_, i) => envSlugs.has(slugs[i]))
+    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") {
+            // ADMIN_ names keep the standard AWS_* vars untouched, so other
+            // AWS clients (e.g. the DynamoDB quota table) keep their own
+            // credentials instead of picking up the panel's Bedrock keys
+            if (p.awsAccessKeyId)
+                updates.ADMIN_AWS_ACCESS_KEY_ID = p.awsAccessKeyId
+            if (p.awsSecretAccessKey)
+                updates.ADMIN_AWS_SECRET_ACCESS_KEY = p.awsSecretAccessKey
+            if (p.awsRegion) updates.ADMIN_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("ADMIN_AWS_ACCESS_KEY_ID")
+            keys.add("ADMIN_AWS_SECRET_ACCESS_KEY")
+            keys.add("ADMIN_AWS_REGION")
+            // Written by older versions; listed so the next save clears them
+            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]
+}

lib/admin/settings-registry.ts

@@ -0,0 +1,229 @@
+// 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),
+    ]),
+)

lib/admin/settings.ts

@@ -0,0 +1,149 @@
+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>
+}
+
+interface SettingsState {
+    // Original env values snapshotted before the first overlay, so removing
+    // a key from the settings file restores the env default. null = was unset.
+    originalEnv: Record<string, string | null>
+    // Keys currently overlaid, so we can restore ones removed from the file.
+    overlaidKeys: Set<string>
+    cachedSettings: Record<string, string> | null
+}
+
+// Kept on globalThis because the build can load this module more than once
+// (instrumentation.ts and the API routes get separate copies); per-module
+// state would make a route forget what instrumentation overlaid at startup.
+const globalState = globalThis as typeof globalThis & {
+    __adminSettingsState?: SettingsState
+}
+globalState.__adminSettingsState ??= {
+    originalEnv: {},
+    overlaidKeys: new Set(),
+    cachedSettings: null,
+}
+const state = globalState.__adminSettingsState
+
+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 (state.cachedSettings) return state.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
+        }
+        state.cachedSettings = values
+    } catch (err: any) {
+        if (err?.code !== "ENOENT") {
+            console.error("[admin-settings] Failed to read settings file:", err)
+        }
+        state.cachedSettings = {}
+    }
+    return state.cachedSettings
+}
+
+export function applyToEnv(): void {
+    const values = loadSettings()
+    const { originalEnv } = state
+
+    // Restore env for keys that were overlaid before but are now gone
+    for (const key of state.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
+    }
+
+    state.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 (state.overlaidKeys.has(key)) return state.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)
+
+    state.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 {
+    state.cachedSettings = null
+    writableCache = null
+    for (const key of state.overlaidKeys) {
+        const original = state.originalEnv[key]
+        if (original === null) delete process.env[key]
+        else if (original !== undefined) process.env[key] = original
+    }
+    state.overlaidKeys = new Set()
+    state.originalEnv = {}
+}

lib/ai-config.ts

@@ -1,26 +0,0 @@
-import { STORAGE_KEYS } from "./storage"
-
-/**
- * Get AI configuration from localStorage.
- * Returns API keys and settings for custom AI providers.
- * Used to override server defaults when user provides their own API key.
- */
-export function getAIConfig() {
-    if (typeof window === "undefined") {
-        return {
-            accessCode: "",
-            aiProvider: "",
-            aiBaseUrl: "",
-            aiApiKey: "",
-            aiModel: "",
-        }
-    }
-
-    return {
-        accessCode: localStorage.getItem(STORAGE_KEYS.accessCode) || "",
-        aiProvider: localStorage.getItem(STORAGE_KEYS.aiProvider) || "",
-        aiBaseUrl: localStorage.getItem(STORAGE_KEYS.aiBaseUrl) || "",
-        aiApiKey: localStorage.getItem(STORAGE_KEYS.aiApiKey) || "",
-        aiModel: localStorage.getItem(STORAGE_KEYS.aiModel) || "",
-    }
-}