fix: use proxy.ts instead of middleware.ts for Next.js 16

* fix(edit_diagram): implement cascade delete for children and edges

- Add automatic cascade deletion when deleting a cell
- Recursively delete all child cells (parent attribute references)
- Delete all edges referencing deleted cells (source/target)
- Skip silently if cell already deleted (handles AI redundant ops)
- Update prompts to inform AI about cascade behavior

Fixes #450

* fix: add root cell protection and sync MCP server cascade delete

- Add protection for root cells '0' and '1' to prevent full diagram wipe
- Sync MCP server with main app's cascade delete logic
- Both lib/utils.ts and packages/mcp-server now have identical delete behavior

* chore(mcp): bump version to 0.1.9

* fix(cascade-delete): recursively collect edge children (labels)

- Change from cellsToDelete.add(edgeId) to collectDescendants(edgeId)
- Fixes orphaned edge labels causing draw.io to crash/clear canvas
- Edge labels (parent=edgeId) are now deleted with their parent edge

.github/workflows/auto-format.yml

@@ -20,13 +20,10 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: '20'
-
-      - name: Install Biome
-        run: npm install --save-dev @biomejs/biome
+          node-version: '24'
 
       - name: Run Biome format
-        run: npx @biomejs/biome check --write --no-errors-on-unmatched .
+        run: npx @biomejs/biome@latest check --write --no-errors-on-unmatched .
 
       - name: Check for changes
         id: changes

.github/workflows/ci.yml

@@ -25,11 +25,11 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: '20'
+          node-version: '24'
           cache: 'npm'
 
       - name: Install dependencies
-        run: npm ci
+        run: npm install
 
       - name: Type check
         run: npx tsc --noEmit

.github/workflows/docker-build.yml

@@ -54,7 +54,7 @@ jobs:
             type=raw,value=latest,enable={{is_default_branch}}
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           push: ${{ github.event_name != 'pull_request' }}

.github/workflows/electron-release.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: 20
+          node-version: 24
           cache: "npm"
 
       - name: Install dependencies

Dockerfile

@@ -1,7 +1,7 @@
 # Multi-stage Dockerfile for Next.js
 
 # Stage 1: Install dependencies
-FROM node:20-alpine AS deps
+FROM node:24-alpine AS deps
 RUN apk add --no-cache libc6-compat
 WORKDIR /app
 
@@ -9,10 +9,10 @@ WORKDIR /app
 COPY package.json package-lock.json* ./
 
 # Install dependencies
-RUN npm ci
+RUN npm install
 
 # Stage 2: Build application
-FROM node:20-alpine AS builder
+FROM node:24-alpine AS builder
 WORKDIR /app
 
 # Copy node_modules from deps stage
@@ -34,7 +34,7 @@ ENV NEXT_PUBLIC_SHOW_ABOUT_AND_NOTICE=${NEXT_PUBLIC_SHOW_ABOUT_AND_NOTICE}
 RUN npm run build
 
 # Stage 3: Production runtime
-FROM node:20-alpine AS runner
+FROM node:24-alpine AS runner
 WORKDIR /app
 
 ENV NODE_ENV=production

README.md

@@ -19,6 +19,7 @@ English | [中文](./docs/README_CN.md) | [日本語](./docs/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!
 
 
 https://github.com/user-attachments/assets/9d60a3e8-4a1c-4b5e-acbb-26af2d3eabd1
@@ -26,17 +27,20 @@ https://github.com/user-attachments/assets/9d60a3e8-4a1c-4b5e-acbb-26af2d3eabd1
 
 
 ## Table of Contents
-- [Next AI Draw.io ](#next-ai-drawio-)
+- [Next AI Draw.io](#next-ai-drawio)
   - [Table of Contents](#table-of-contents)
   - [Examples](#examples)
   - [Features](#features)
   - [MCP Server (Preview)](#mcp-server-preview)
+    - [Claude Code CLI](#claude-code-cli)
   - [Getting Started](#getting-started)
     - [Try it Online](#try-it-online)
     - [Desktop Application](#desktop-application)
     - [Run with Docker (Recommended)](#run-with-docker-recommended)
     - [Installation](#installation)
   - [Deployment](#deployment)
+    - [Deploy on Vercel (Recommended)](#deploy-on-vercel-recommended)
+    - [Deploy on Cloudflare Workers](#deploy-on-cloudflare-workers)
   - [Multi-Provider Support](#multi-provider-support)
   - [How It Works](#how-it-works)
   - [Project Structure](#project-structure)
@@ -132,7 +136,7 @@ No installation needed! Try the app directly on our demo site:
 
 [![Live Demo](./public/live-demo-button.svg)](https://next-ai-drawio.jiang.jp/)
 
-> Note: Due to high traffic, the demo site currently uses minimax-m2. For best results, we recommend self-hosting with Claude Sonnet 4.5 or Claude Opus 4.5.
+
 
 > **Bring Your Own API Key**: You can use your own API key to bypass usage limits on the demo site. Click the Settings icon in the chat panel to configure your provider and API key. Your key is stored locally in your browser and is never stored on the server.
 
@@ -213,7 +217,7 @@ cp env.example .env.local
 
 Edit `.env.local` and configure your chosen provider:
 
--   Set `AI_PROVIDER` to your chosen provider (bedrock, openai, anthropic, google, azure, ollama, openrouter, deepseek, siliconflow)
+-   Set `AI_PROVIDER` to your chosen provider (doubao,bedrock, openai, anthropic, google, azure, ollama, openrouter, deepseek, siliconflow)
 -   Set `AI_MODEL` to the specific model you want to use
 -   Add the required API keys for your provider
 -   `TEMPERATURE`: Optional temperature setting (e.g., `0` for deterministic output). Leave unset for models that don't support it (e.g., reasoning models).
@@ -233,16 +237,15 @@ npm run dev
 
 ## Deployment
 
-The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new) from the creators of Next.js.
+### Deploy on Vercel (Recommended)
 
-Check out the [Next.js deployment documentation](https://nextjs.org/docs/app/building-your-application/deploying) for more details.
-
-Or you can deploy by this button.
 [![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2FDayuanJiang%2Fnext-ai-draw-io)
 
-Be sure to **set the environment variables** in the Vercel dashboard as you did in your local `.env.local` file.
+The easiest way to deploy is using [Vercel](https://vercel.com/new), the creators of Next.js. Be sure to **set the environment variables** in the Vercel dashboard as you did in your local `.env.local` file.
 
-## Deploy on Cloudflare Workers
+See the [Next.js deployment documentation](https://nextjs.org/docs/app/building-your-application/deploying) for more details.
+
+### Deploy on Cloudflare Workers
 
 [Go to Cloudflare Deploy Guide](./docs/Cloudflare_Deploy.md)
 
@@ -250,6 +253,7 @@ Be sure to **set the environment variables** in the Vercel dashboard as you did
 
 ## 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)
 -   AWS Bedrock (default)
 -   OpenAI
 -   Anthropic
@@ -260,6 +264,7 @@ Be sure to **set the environment variables** in the Vercel dashboard as you did
 -   DeepSeek
 -   SiliconFlow
 
+
 All providers except AWS Bedrock and OpenRouter support custom endpoints.
 
 📖 **[Detailed Provider Configuration Guide](./docs/ai-providers.md)** - See setup instructions for each provider.
@@ -300,6 +305,8 @@ public/               # Static assets including example images
 
 ## 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!
+
 If you find this project useful, please consider [sponsoring](https://github.com/sponsors/DayuanJiang) to help me host the live demo site!
 
 For support or inquiries, please open an issue on the GitHub repository or contact the maintainer at:

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

@@ -96,72 +96,68 @@ export default function AboutCN() {
                         </div>
                     </div>
 
-                    <div className="relative mb-8 rounded-2xl bg-gradient-to-br from-amber-50 via-orange-50 to-rose-50 p-[1px] shadow-lg">
-                        <div className="absolute inset-0 rounded-2xl bg-gradient-to-br from-amber-400 via-orange-400 to-rose-400 opacity-20" />
+                    <div className="relative mb-8 rounded-2xl bg-gradient-to-br from-amber-50 via-orange-50 to-yellow-50 p-[1px] shadow-lg">
+                        <div className="absolute inset-0 rounded-2xl bg-gradient-to-br from-amber-400 via-orange-400 to-yellow-400 opacity-20" />
                         <div className="relative rounded-2xl bg-white/80 backdrop-blur-sm p-6">
                             {/* Header */}
                             <div className="mb-4">
                                 <h3 className="text-lg font-bold text-gray-900 tracking-tight">
-                                    模型变更与用量限制{" "}
-                                    <span className="text-sm text-amber-600 font-medium italic font-normal">
-                                        (或者说：我的钱包顶不住了)
-                                    </span>
+                                    由字节跳动豆包提供支持
                                 </h3>
                             </div>
 
                             {/* Story */}
                             <div className="space-y-3 text-sm text-gray-700 leading-relaxed mb-5">
                                 <p>
-                                    大家对这个项目的热情太高了——看来大家都真的很喜欢画图！但这也带来了一个幸福的烦恼：我们经常触发出上游
-                                    AI 接口的频率限制
-                                    (TPS/TPM)。一旦超限，系统就会暂停，导致请求失败。
-                                </p>
-                                <p>
-                                    由于使用量过高，我已将模型从 Opus 4.5 更换为{" "}
+                                    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"
+                                        target="_blank"
+                                        rel="noopener noreferrer"
+                                        className="font-semibold text-blue-600 hover:underline"
+                                    >
+                                        字节跳动豆包
+                                    </a>
+                                    的慷慨赞助，演示站点现已接入强大的{" "}
                                     <span className="font-semibold text-amber-700">
-                                        Haiku 4.5
-                                    </span>
-                                    ，以降低成本。
-                                </p>
-                                <p>
-                                    作为一个
+                                        K2-thinking
+                                    </span>{" "}
+                                    模型，图表生成效果更佳！点击链接注册即可领取{" "}
                                     <span className="font-semibold text-amber-700">
-                                        独立开发者
+                                        50万免费Token
                                     </span>
-                                    ，目前的 API
-                                    费用全是我自己在掏腰包（纯属为爱发电）。为了保证服务能细水长流，同时也为了避免我个人陷入财务危机，我还设置了以下临时用量限制：
+                                    ，适用于所有模型！
                                 </p>
                             </div>
 
-                            {/* Limits Cards */}
-                            <div className="grid grid-cols-2 gap-3 mb-5">
-                                <div className="rounded-xl bg-gradient-to-br from-amber-100 to-orange-100 p-4 text-center">
-                                    <div className="text-xs font-medium text-amber-700 uppercase tracking-wide mb-1">
-                                        Token 用量
-                                    </div>
-                                    <div className="text-lg font-bold text-gray-900">
-                                        {formatNumber(tpmLimit)}
-                                        <span className="text-sm font-normal text-gray-600">
-                                            /分钟
-                                        </span>
-                                    </div>
-                                    <div className="text-lg font-bold text-gray-900">
-                                        {formatNumber(dailyTokenLimit)}
-                                        <span className="text-sm font-normal text-gray-600">
-                                            /天
-                                        </span>
-                                    </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="rounded-xl bg-gradient-to-br from-amber-100 to-orange-100 p-4 text-center">
-                                    <div className="text-xs font-medium text-amber-700 uppercase tracking-wide mb-1">
-                                        每日请求数
-                                    </div>
-                                    <div className="text-2xl font-bold text-gray-900">
-                                        {dailyRequestLimit}
-                                    </div>
-                                    <div className="text-sm text-gray-600">
-                                        次
-                                    </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>
 
@@ -171,48 +167,19 @@ export default function AboutCN() {
                             </div>
 
                             {/* Bring Your Own Key */}
-                            <div className="text-center mb-5">
+                            <div className="text-center">
                                 <h4 className="text-base font-bold text-gray-900 mb-2">
                                     使用自己的 API Key
                                 </h4>
                                 <p className="text-sm text-gray-600 mb-2 max-w-md mx-auto">
-                                    您可以使用自己的 API Key
-                                    来绕过这些限制。点击聊天面板中的设置图标即可配置您的
-                                    Provider 和 API Key。
+                                    您也可以使用自己的 API
+                                    Key，支持多种服务商。点击聊天面板中的设置图标即可配置。
                                 </p>
                                 <p className="text-xs text-gray-500 max-w-md mx-auto">
                                     您的 Key
                                     仅保存在浏览器本地，不会被存储在服务器上。
                                 </p>
                             </div>
-
-                            {/* Divider */}
-                            <div className="flex items-center gap-3 mb-5">
-                                <div className="flex-1 h-px bg-gradient-to-r from-transparent via-amber-300 to-transparent" />
-                            </div>
-
-                            {/* Sponsorship CTA */}
-                            <div className="text-center">
-                                <h4 className="text-base font-bold text-gray-900 mb-2">
-                                    寻求赞助 (求大佬捞一把)
-                                </h4>
-                                <p className="text-sm text-gray-600 mb-4 max-w-md mx-auto">
-                                    要想彻底解除这些限制，扩容后端是唯一的办法。我正在积极寻求
-                                    AI API 提供商或云平台的赞助。
-                                </p>
-                                <p className="text-sm text-gray-600 mb-4 max-w-md mx-auto">
-                                    作为回报（无论是额度支持还是资金支持），我将在
-                                    GitHub 仓库和 Live Demo
-                                    网站的显眼位置展示贵公司的 Logo
-                                    作为平台赞助商。
-                                </p>
-                                <a
-                                    href="mailto:me@jiang.jp"
-                                    className="inline-flex items-center gap-2 px-5 py-2.5 rounded-full bg-gradient-to-r from-amber-500 to-orange-500 text-white font-medium text-sm shadow-md hover:shadow-lg hover:scale-105 transition-all duration-200"
-                                >
-                                    联系我
-                                </a>
-                            </div>
                         </div>
                     </div>
 
@@ -377,6 +344,16 @@ export default function AboutCN() {
                         多提供商支持
                     </h2>
                     <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"
+                                target="_blank"
+                                rel="noopener noreferrer"
+                                className="text-blue-600 hover:underline"
+                            >
+                                字节跳动豆包
+                            </a>
+                        </li>
                         <li>AWS Bedrock（默认）</li>
                         <li>
                             OpenAI / OpenAI兼容API（通过{" "}
@@ -388,6 +365,7 @@ export default function AboutCN() {
                         <li>Ollama</li>
                         <li>OpenRouter</li>
                         <li>DeepSeek</li>
+                        <li>SiliconFlow</li>
                     </ul>
                     <p className="text-gray-700 mt-4">
                         注意：<code>claude-sonnet-4-5</code>{" "}
@@ -395,18 +373,21 @@ export default function AboutCN() {
                     </p>
 
                     {/* Support */}
-                    <div className="flex items-center gap-4 mt-10 mb-4">
-                        <h2 className="text-2xl font-semibold text-gray-900">
-                            支持与联系
-                        </h2>
-                        <iframe
-                            src="https://github.com/sponsors/DayuanJiang/button"
-                            title="Sponsor DayuanJiang"
-                            height="32"
-                            width="114"
-                            style={{ border: 0, borderRadius: 6 }}
-                        />
-                    </div>
+                    <h2 className="text-2xl font-semibold text-gray-900 mt-10 mb-4">
+                        支持与联系
+                    </h2>
+                    <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"
+                            target="_blank"
+                            rel="noopener noreferrer"
+                            className="text-blue-600 hover:underline"
+                        >
+                            字节跳动豆包
+                        </a>{" "}
+                        为本站提供 API Token 支持！
+                    </p>
                     <p className="text-gray-700">
                         如果您觉得这个项目有用，请考虑{" "}
                         <a

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

@@ -104,73 +104,68 @@ export default function AboutJA() {
                         </div>
                     </div>
 
-                    <div className="relative mb-8 rounded-2xl bg-gradient-to-br from-amber-50 via-orange-50 to-rose-50 p-[1px] shadow-lg">
-                        <div className="absolute inset-0 rounded-2xl bg-gradient-to-br from-amber-400 via-orange-400 to-rose-400 opacity-20" />
+                    <div className="relative mb-8 rounded-2xl bg-gradient-to-br from-amber-50 via-orange-50 to-yellow-50 p-[1px] shadow-lg">
+                        <div className="absolute inset-0 rounded-2xl bg-gradient-to-br from-amber-400 via-orange-400 to-yellow-400 opacity-20" />
                         <div className="relative rounded-2xl bg-white/80 backdrop-blur-sm p-6">
                             {/* Header */}
                             <div className="mb-4">
                                 <h3 className="text-lg font-bold text-gray-900 tracking-tight">
-                                    モデル変更と利用制限について{" "}
-                                    <span className="text-sm text-amber-600 font-medium italic font-normal">
-                                        （別名：お財布が悲鳴を上げています）
-                                    </span>
+                                    ByteDance Doubao提供
                                 </h3>
                             </div>
 
                             {/* Story */}
                             <div className="space-y-3 text-sm text-gray-700 leading-relaxed mb-5">
                                 <p>
-                                    予想以上の反響をいただき、ありがとうございます！皆様にダイアグラム作成を楽しんでいただいているのは嬉しい限りですが、その熱量により
-                                    AI API のレート制限 (TPS/TPM)
-                                    に頻繁に引っかかってしまっています。制限に達するとシステムが一時停止し、エラーが発生してしまいます。
-                                </p>
-                                <p>
-                                    利用量の増加に伴い、コスト削減のためモデルを
-                                    Opus 4.5 から{" "}
+                                    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"
+                                        target="_blank"
+                                        rel="noopener noreferrer"
+                                        className="font-semibold text-blue-600 hover:underline"
+                                    >
+                                        ByteDance Doubao
+                                    </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">
-                                        Haiku 4.5
+                                        K2-thinking
                                     </span>{" "}
-                                    に変更しました。
-                                </p>
-                                <p>
-                                    私は現在、
+                                    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">
-                                        個人開発者
+                                        50万トークン
                                     </span>
-                                    として API
-                                    費用を全額自腹で負担しています。サービスを継続し、かつ私自身が借金を背負わないようにするため（笑）、一時的に以下の利用制限も設けさせていただきました。
+                                    が無料でもらえます！
                                 </p>
                             </div>
 
-                            {/* Limits Cards */}
-                            <div className="grid grid-cols-2 gap-3 mb-5">
-                                <div className="rounded-xl bg-gradient-to-br from-amber-100 to-orange-100 p-4 text-center">
-                                    <div className="text-xs font-medium text-amber-700 uppercase tracking-wide mb-1">
-                                        トークン使用量
-                                    </div>
-                                    <div className="text-lg font-bold text-gray-900">
-                                        {formatNumber(tpmLimit)}
-                                        <span className="text-sm font-normal text-gray-600">
-                                            /分
-                                        </span>
-                                    </div>
-                                    <div className="text-lg font-bold text-gray-900">
-                                        {formatNumber(dailyTokenLimit)}
-                                        <span className="text-sm font-normal text-gray-600">
-                                            /日
-                                        </span>
-                                    </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="rounded-xl bg-gradient-to-br from-amber-100 to-orange-100 p-4 text-center">
-                                    <div className="text-xs font-medium text-amber-700 uppercase tracking-wide mb-1">
-                                        1日のリクエスト数
-                                    </div>
-                                    <div className="text-2xl font-bold text-gray-900">
-                                        {dailyRequestLimit}
-                                    </div>
-                                    <div className="text-sm text-gray-600">
-                                        回
-                                    </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>
 
@@ -180,44 +175,17 @@ export default function AboutJA() {
                             </div>
 
                             {/* Bring Your Own Key */}
-                            <div className="text-center mb-5">
+                            <div className="text-center">
                                 <h4 className="text-base font-bold text-gray-900 mb-2">
                                     自分のAPIキーを使用
                                 </h4>
                                 <p className="text-sm text-gray-600 mb-2 max-w-md mx-auto">
-                                    自分のAPIキーを使用することで、これらの制限を回避できます。チャットパネルの設定アイコンをクリックして、プロバイダーとAPIキーを設定してください。
+                                    お好みのプロバイダーで自分のAPIキーを使用することもできます。チャットパネルの設定アイコンをクリックして設定してください。
                                 </p>
                                 <p className="text-xs text-gray-500 max-w-md mx-auto">
                                     キーはブラウザのローカルに保存され、サーバーには保存されません。
                                 </p>
                             </div>
-
-                            {/* Divider */}
-                            <div className="flex items-center gap-3 mb-5">
-                                <div className="flex-1 h-px bg-gradient-to-r from-transparent via-amber-300 to-transparent" />
-                            </div>
-
-                            {/* Sponsorship CTA */}
-                            <div className="text-center">
-                                <h4 className="text-base font-bold text-gray-900 mb-2">
-                                    スポンサー募集
-                                </h4>
-                                <p className="text-sm text-gray-600 mb-4 max-w-md mx-auto">
-                                    これらの制限を取り払い、バックエンドをスケールさせるには皆様の支援が必要です。現在、AI
-                                    API
-                                    プロバイダー様やクラウドプラットフォーム様からのスポンサー支援を積極的に募集しています。
-                                </p>
-                                <p className="text-sm text-gray-600 mb-4 max-w-md mx-auto">
-                                    ご支援（クレジット提供や資金援助）をいただける場合、GitHub
-                                    リポジトリおよびデモサイトにて、プラットフォームスポンサーとして貴社を大々的にご紹介させていただきます。
-                                </p>
-                                <a
-                                    href="mailto:me@jiang.jp"
-                                    className="inline-flex items-center gap-2 px-5 py-2.5 rounded-full bg-gradient-to-r from-amber-500 to-orange-500 text-white font-medium text-sm shadow-md hover:shadow-lg hover:scale-105 transition-all duration-200"
-                                >
-                                    お問い合わせ
-                                </a>
-                            </div>
                         </div>
                     </div>
 
@@ -391,6 +359,16 @@ export default function AboutJA() {
                         マルチプロバイダーサポート
                     </h2>
                     <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"
+                                target="_blank"
+                                rel="noopener noreferrer"
+                                className="text-blue-600 hover:underline"
+                            >
+                                ByteDance Doubao
+                            </a>
+                        </li>
                         <li>AWS Bedrock（デフォルト）</li>
                         <li>
                             OpenAI / OpenAI互換API（<code>OPENAI_BASE_URL</code>
@@ -402,6 +380,7 @@ export default function AboutJA() {
                         <li>Ollama</li>
                         <li>OpenRouter</li>
                         <li>DeepSeek</li>
+                        <li>SiliconFlow</li>
                     </ul>
                     <p className="text-gray-700 mt-4">
                         注：<code>claude-sonnet-4-5</code>
@@ -409,18 +388,21 @@ export default function AboutJA() {
                     </p>
 
                     {/* Support */}
-                    <div className="flex items-center gap-4 mt-10 mb-4">
-                        <h2 className="text-2xl font-semibold text-gray-900">
-                            サポート＆お問い合わせ
-                        </h2>
-                        <iframe
-                            src="https://github.com/sponsors/DayuanJiang/button"
-                            title="Sponsor DayuanJiang"
-                            height="32"
-                            width="114"
-                            style={{ border: 0, borderRadius: 6 }}
-                        />
-                    </div>
+                    <h2 className="text-2xl font-semibold text-gray-900 mt-10 mb-4">
+                        サポート＆お問い合わせ
+                    </h2>
+                    <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"
+                            target="_blank"
+                            rel="noopener noreferrer"
+                            className="text-blue-600 hover:underline"
+                        >
+                            ByteDance Doubao
+                        </a>{" "}
+                        様に、心より感謝申し上げます。
+                    </p>
                     <p className="text-gray-700">
                         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{" "}
                         <a

app/[lang]/about/page.tsx

@@ -104,79 +104,70 @@ export default function About() {
                         </div>
                     </div>
 
-                    <div className="relative mb-8 rounded-2xl bg-gradient-to-br from-amber-50 via-orange-50 to-rose-50 p-[1px] shadow-lg">
-                        <div className="absolute inset-0 rounded-2xl bg-gradient-to-br from-amber-400 via-orange-400 to-rose-400 opacity-20" />
+                    <div className="relative mb-8 rounded-2xl bg-gradient-to-br from-amber-50 via-orange-50 to-yellow-50 p-[1px] shadow-lg">
+                        <div className="absolute inset-0 rounded-2xl bg-gradient-to-br from-amber-400 via-orange-400 to-yellow-400 opacity-20" />
                         <div className="relative rounded-2xl bg-white/80 backdrop-blur-sm p-6">
                             {/* Header */}
                             <div className="mb-4">
                                 <h3 className="text-lg font-bold text-gray-900 tracking-tight">
-                                    Model Change & Usage Limits{" "}
-                                    <span className="text-sm text-amber-600 font-medium italic font-normal">
-                                        (Or: Why My Wallet is Crying)
-                                    </span>
+                                    Sponsored by ByteDance Doubao
                                 </h3>
                             </div>
 
                             {/* Story */}
                             <div className="space-y-3 text-sm text-gray-700 leading-relaxed mb-5">
                                 <p>
-                                    The response to this project has been
-                                    incredible—you all love making diagrams!
-                                    However, this enthusiasm means we are
-                                    frequently hitting the AI API rate limits
-                                    (TPS/TPM). When this happens, the system
-                                    pauses, leading to failed requests.
-                                </p>
-                                <p>
-                                    Due to the high usage, I have changed the
-                                    model from Opus 4.5 to{" "}
+                                    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"
+                                        target="_blank"
+                                        rel="noopener noreferrer"
+                                        className="font-semibold text-blue-600 hover:underline"
+                                    >
+                                        ByteDance Doubao
+                                    </a>
+                                    , the demo site now uses the powerful{" "}
                                     <span className="font-semibold text-amber-700">
-                                        Haiku 4.5
-                                    </span>
-                                    , which is more cost-effective.
-                                </p>
-                                <p>
-                                    As an{" "}
+                                        K2-thinking
+                                    </span>{" "}
+                                    model for better diagram generation! Sign up
+                                    via the link to get{" "}
                                     <span className="font-semibold text-amber-700">
-                                        indie developer
-                                    </span>
-                                    , I am currently footing the entire API
-                                    bill. To keep the lights on and ensure the
-                                    service remains available to everyone
-                                    without sending me into debt, I have also
-                                    implemented the following temporary caps:
+                                        500K free tokens
+                                    </span>{" "}
+                                    for all models!
                                 </p>
                             </div>
 
-                            {/* Limits Cards */}
-                            <div className="grid grid-cols-2 gap-3 mb-5">
-                                <div className="rounded-xl bg-gradient-to-br from-amber-100 to-orange-100 p-4 text-center">
-                                    <div className="text-xs font-medium text-amber-700 uppercase tracking-wide mb-1">
-                                        Token Usage
-                                    </div>
-                                    <div className="text-lg font-bold text-gray-900">
-                                        {formatNumber(tpmLimit)}
-                                        <span className="text-sm font-normal text-gray-600">
-                                            /min
-                                        </span>
-                                    </div>
-                                    <div className="text-lg font-bold text-gray-900">
-                                        {formatNumber(dailyTokenLimit)}
-                                        <span className="text-sm font-normal text-gray-600">
-                                            /day
-                                        </span>
-                                    </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="rounded-xl bg-gradient-to-br from-amber-100 to-orange-100 p-4 text-center">
-                                    <div className="text-xs font-medium text-amber-700 uppercase tracking-wide mb-1">
-                                        Daily Requests
-                                    </div>
-                                    <div className="text-2xl font-bold text-gray-900">
-                                        {dailyRequestLimit}
-                                    </div>
-                                    <div className="text-sm text-gray-600">
-                                        requests
-                                    </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>
 
@@ -186,51 +177,21 @@ export default function About() {
                             </div>
 
                             {/* Bring Your Own Key */}
-                            <div className="text-center mb-5">
+                            <div className="text-center">
                                 <h4 className="text-base font-bold text-gray-900 mb-2">
                                     Bring Your Own API Key
                                 </h4>
                                 <p className="text-sm text-gray-600 mb-2 max-w-md mx-auto">
-                                    You can use your own API key to bypass these
-                                    limits. Click the Settings icon in the chat
-                                    panel to configure your provider and API
-                                    key.
+                                    You can also use your own API key with any
+                                    supported provider. Click the Settings icon
+                                    in the chat panel to configure your provider
+                                    and API key.
                                 </p>
                                 <p className="text-xs text-gray-500 max-w-md mx-auto">
                                     Your key is stored locally in your browser
                                     and is never stored on the server.
                                 </p>
                             </div>
-
-                            {/* Divider */}
-                            <div className="flex items-center gap-3 mb-5">
-                                <div className="flex-1 h-px bg-gradient-to-r from-transparent via-amber-300 to-transparent" />
-                            </div>
-
-                            {/* Sponsorship CTA */}
-                            <div className="text-center">
-                                <h4 className="text-base font-bold text-gray-900 mb-2">
-                                    Call for Sponsorship
-                                </h4>
-                                <p className="text-sm text-gray-600 mb-4 max-w-md mx-auto">
-                                    Scaling the backend is the only way to
-                                    remove these limits. I am actively seeking
-                                    sponsorship from AI API providers or Cloud
-                                    Platforms.
-                                </p>
-                                <p className="text-sm text-gray-600 mb-4 max-w-md mx-auto">
-                                    In return for support (credits or funding),
-                                    I will prominently feature your company as a
-                                    platform sponsor on both the GitHub
-                                    repository and the live demo site.
-                                </p>
-                                <a
-                                    href="mailto:me@jiang.jp"
-                                    className="inline-flex items-center gap-2 px-5 py-2.5 rounded-full bg-gradient-to-r from-amber-500 to-orange-500 text-white font-medium text-sm shadow-md hover:shadow-lg hover:scale-105 transition-all duration-200"
-                                >
-                                    Contact Me
-                                </a>
-                            </div>
                         </div>
                     </div>
 
@@ -417,6 +378,16 @@ export default function About() {
                         Multi-Provider Support
                     </h2>
                     <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"
+                                target="_blank"
+                                rel="noopener noreferrer"
+                                className="text-blue-600 hover:underline"
+                            >
+                                ByteDance Doubao
+                            </a>
+                        </li>
                         <li>AWS Bedrock (default)</li>
                         <li>
                             OpenAI / OpenAI-compatible APIs (via{" "}
@@ -428,6 +399,7 @@ export default function About() {
                         <li>Ollama</li>
                         <li>OpenRouter</li>
                         <li>DeepSeek</li>
+                        <li>SiliconFlow</li>
                     </ul>
                     <p className="text-gray-700 mt-4">
                         Note that <code>claude-sonnet-4-5</code> has trained on
@@ -437,18 +409,21 @@ export default function About() {
                     </p>
 
                     {/* Support */}
-                    <div className="flex items-center gap-4 mt-10 mb-4">
-                        <h2 className="text-2xl font-semibold text-gray-900">
-                            Support &amp; Contact
-                        </h2>
-                        <iframe
-                            src="https://github.com/sponsors/DayuanJiang/button"
-                            title="Sponsor DayuanJiang"
-                            height="32"
-                            width="114"
-                            style={{ border: 0, borderRadius: 6 }}
-                        />
-                    </div>
+                    <h2 className="text-2xl font-semibold text-gray-900 mt-10 mb-4">
+                        Support &amp; Contact
+                    </h2>
+                    <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"
+                            target="_blank"
+                            rel="noopener noreferrer"
+                            className="text-blue-600 hover:underline"
+                        >
+                            ByteDance Doubao
+                        </a>{" "}
+                        for sponsoring the API token usage of the demo site!
+                    </p>
                     <p className="text-gray-700">
                         If you find this project useful, please consider{" "}
                         <a

app/api/chat/route.ts

@@ -605,7 +605,7 @@ Notes:
 Operations:
 - update: Replace an existing cell by its id. Provide cell_id and complete new_xml.
 - add: Add a new cell. Provide cell_id (new unique id) and new_xml.
-- delete: Remove a cell by its id. Only cell_id is needed.
+- delete: Remove a cell. Cascade is automatic: children AND edges (source/target) are auto-deleted. Only specify ONE cell_id.
 
 For update/add, new_xml must be a complete mxCell element including mxGeometry.
 
@@ -614,8 +614,8 @@ For update/add, new_xml must be a complete mxCell element including mxGeometry.
 Example - Add a rectangle:
 {"operations": [{"operation": "add", "cell_id": "rect-1", "new_xml": "<mxCell id=\\"rect-1\\" value=\\"Hello\\" style=\\"rounded=0;\\" vertex=\\"1\\" parent=\\"1\\"><mxGeometry x=\\"100\\" y=\\"100\\" width=\\"120\\" height=\\"60\\" as=\\"geometry\\"/></mxCell>"}]}
 
-Example - Delete a cell:
-{"operations": [{"operation": "delete", "cell_id": "rect-1"}]}`,
+Example - Delete container (children & edges auto-deleted):
+{"operations": [{"operation": "delete", "cell_id": "2"}]}`,
                 inputSchema: z.object({
                     operations: z
                         .array(

app/api/validate-model/route.ts

@@ -225,6 +225,27 @@ export async function POST(req: Request) {
                 break
             }
 
+            case "sglang": {
+                // SGLang is OpenAI-compatible
+                const sglang = createOpenAI({
+                    apiKey: apiKey || "not-needed",
+                    baseURL: baseUrl || "http://127.0.0.1:8000/v1",
+                })
+                model = sglang.chat(modelId)
+                break
+            }
+
+            case "doubao": {
+                // ByteDance Doubao uses DeepSeek-compatible API
+                const doubao = createDeepSeek({
+                    apiKey,
+                    baseURL:
+                        baseUrl || "https://ark.cn-beijing.volces.com/api/v3",
+                })
+                model = doubao(modelId)
+                break
+            }
+
             default:
                 return NextResponse.json(
                     { valid: false, error: `Unknown provider: ${provider}` },

components/chat-input.tsx

@@ -17,14 +17,9 @@ import { HistoryDialog } from "@/components/history-dialog"
 import { ModelSelector } from "@/components/model-selector"
 import { ResetWarningModal } from "@/components/reset-warning-modal"
 import { SaveDialog } from "@/components/save-dialog"
+
 import { Button } from "@/components/ui/button"
-import { Switch } from "@/components/ui/switch"
 import { Textarea } from "@/components/ui/textarea"
-import {
-    Tooltip,
-    TooltipContent,
-    TooltipTrigger,
-} from "@/components/ui/tooltip"
 import { useDiagram } from "@/contexts/diagram-context"
 import { useDictionary } from "@/hooks/use-dictionary"
 import { formatMessage } from "@/lib/i18n/utils"
@@ -152,12 +147,9 @@ interface ChatInputProps {
         File,
         { text: string; charCount: number; isExtracting: boolean }
     >
-    showHistory?: boolean
-    onToggleHistory?: (show: boolean) => void
+
     sessionId?: string
     error?: Error | null
-    minimalStyle?: boolean
-    onMinimalStyleChange?: (value: boolean) => void
     // Model selector props
     models?: FlattenedModel[]
     selectedModelId?: string
@@ -175,12 +167,8 @@ export function ChatInput({
     files = [],
     onFileChange = () => {},
     pdfData = new Map(),
-    showHistory = false,
-    onToggleHistory = () => {},
     sessionId,
     error = null,
-    minimalStyle = false,
-    onMinimalStyleChange = () => {},
     models = [],
     selectedModelId,
     onModelSelect = () => {},
@@ -188,16 +176,14 @@ export function ChatInput({
     onConfigureModels = () => {},
 }: ChatInputProps) {
     const dict = useDictionary()
-    const {
-        diagramHistory,
-        saveDiagramToFile,
-        showSaveDialog,
-        setShowSaveDialog,
-    } = useDiagram()
+    const { diagramHistory, saveDiagramToFile } = useDiagram()
+
     const textareaRef = useRef<HTMLTextAreaElement>(null)
     const fileInputRef = useRef<HTMLInputElement>(null)
     const [isDragging, setIsDragging] = useState(false)
     const [showClearDialog, setShowClearDialog] = useState(false)
+    const [showHistory, setShowHistory] = useState(false)
+    const [showSaveDialog, setShowSaveDialog] = useState(false)
     // Allow retry when there's an error (even if status is still "streaming" or "submitted")
     const isDisabled =
         (status === "streaming" || status === "submitted") && !error
@@ -385,99 +371,58 @@ export function ChatInput({
                             onOpenChange={setShowClearDialog}
                             onClear={handleClear}
                         />
-
-                        <HistoryDialog
-                            showHistory={showHistory}
-                            onToggleHistory={onToggleHistory}
-                        />
-
-                        <Tooltip>
-                            <TooltipTrigger asChild>
-                                <div className="flex items-center gap-1.5">
-                                    <Switch
-                                        id="minimal-style"
-                                        checked={minimalStyle}
-                                        onCheckedChange={onMinimalStyleChange}
-                                        className="scale-75"
-                                    />
-                                    <label
-                                        htmlFor="minimal-style"
-                                        className={`text-xs cursor-pointer select-none ${
-                                            minimalStyle
-                                                ? "text-primary font-medium"
-                                                : "text-muted-foreground"
-                                        }`}
-                                    >
-                                        {minimalStyle
-                                            ? dict.chat.minimalStyle
-                                            : dict.chat.styledMode}
-                                    </label>
-                                </div>
-                            </TooltipTrigger>
-                            <TooltipContent side="top">
-                                {dict.chat.minimalTooltip}
-                            </TooltipContent>
-                        </Tooltip>
                     </div>
 
                     <div className="flex items-center gap-1 overflow-hidden justify-end">
-                        <ButtonWithTooltip
-                            type="button"
-                            variant="ghost"
-                            size="sm"
-                            onClick={() => onToggleHistory(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>
+                        <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={() => 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>
 
-                        <SaveDialog
-                            open={showSaveDialog}
-                            onOpenChange={setShowSaveDialog}
-                            onSave={(filename, format) =>
-                                saveDiagramToFile(filename, format, sessionId)
-                            }
-                            defaultFilename={`diagram-${new Date()
-                                .toISOString()
-                                .slice(0, 10)}`}
-                        />
-
-                        <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>
-
-                        <input
-                            type="file"
-                            ref={fileInputRef}
-                            className="hidden"
-                            onChange={handleFileChange}
-                            accept="image/*,.pdf,application/pdf,text/*,.md,.markdown,.json,.csv,.xml,.yaml,.yml,.toml"
-                            multiple
-                            disabled={isDisabled}
-                        />
+                            <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>
 
+                            <input
+                                type="file"
+                                ref={fileInputRef}
+                                className="hidden"
+                                onChange={handleFileChange}
+                                accept="image/*,.pdf,application/pdf,text/*,.md,.markdown,.json,.csv,.xml,.yaml,.yml,.toml"
+                                multiple
+                                disabled={isDisabled}
+                            />
+                        </div>
                         <ModelSelector
                             models={models}
                             selectedModelId={selectedModelId}
@@ -486,9 +431,7 @@ export function ChatInput({
                             disabled={isDisabled}
                             showUnvalidatedModels={showUnvalidatedModels}
                         />
-
                         <div className="w-px h-5 bg-border mx-1" />
-
                         <Button
                             type="submit"
                             disabled={isDisabled || !input.trim()}
@@ -510,6 +453,20 @@ export function ChatInput({
                     </div>
                 </div>
             </div>
+            <HistoryDialog
+                showHistory={showHistory}
+                onToggleHistory={setShowHistory}
+            />
+            <SaveDialog
+                open={showSaveDialog}
+                onOpenChange={setShowSaveDialog}
+                onSave={(filename, format) =>
+                    saveDiagramToFile(filename, format, sessionId)
+                }
+                defaultFilename={`diagram-${new Date()
+                    .toISOString()
+                    .slice(0, 10)}`}
+            />
         </form>
     )
 }

components/chat-panel.tsx

@@ -14,18 +14,12 @@ import Link from "next/link"
 import type React from "react"
 import { useCallback, useEffect, useRef, useState } from "react"
 import { flushSync } from "react-dom"
-import { FaGithub } from "react-icons/fa"
 import { Toaster, toast } from "sonner"
 import { ButtonWithTooltip } from "@/components/button-with-tooltip"
 import { ChatInput } from "@/components/chat-input"
 import { ModelConfigDialog } from "@/components/model-config-dialog"
 import { ResetWarningModal } from "@/components/reset-warning-modal"
 import { SettingsDialog } from "@/components/settings-dialog"
-import {
-    Tooltip,
-    TooltipContent,
-    TooltipTrigger,
-} from "@/components/ui/tooltip"
 import { useDiagram } from "@/contexts/diagram-context"
 import { useDiagramToolHandlers } from "@/hooks/use-diagram-tool-handlers"
 import { useDictionary } from "@/hooks/use-dictionary"
@@ -154,7 +148,6 @@ export default function ChatPanel({
     // File processing using extracted hook
     const { files, pdfData, handleFileChange, setFiles } = useFileProcessor()
 
-    const [showHistory, setShowHistory] = useState(false)
     const [showSettingsDialog, setShowSettingsDialog] = useState(false)
     const [showModelConfigDialog, setShowModelConfigDialog] = useState(false)
 
@@ -192,6 +185,7 @@ export default function ChatPanel({
         dailyRequestLimit,
         dailyTokenLimit,
         tpmLimit,
+        onConfigModel: () => setShowModelConfigDialog(true),
     })
 
     // Generate a unique session ID for Langfuse tracing (restore from localStorage if available)
@@ -247,182 +241,178 @@ export default function ChatPanel({
         onExport,
     })
 
-    const {
-        messages,
-        sendMessage,
-        addToolOutput,
-        stop,
-        status,
-        error,
-        setMessages,
-    } = useChat({
-        transport: new DefaultChatTransport({
-            api: getApiEndpoint("/api/chat"),
-        }),
-        onToolCall: async ({ toolCall }) => {
-            await handleToolCall({ toolCall }, addToolOutput)
-        },
-        onError: (error) => {
-            // Handle server-side quota limit (429 response)
-            // AI SDK puts the full response body in error.message for non-OK responses
-            try {
-                const data = JSON.parse(error.message)
-                if (data.type === "request") {
-                    quotaManager.showQuotaLimitToast(data.used, data.limit)
-                    return
-                }
-                if (data.type === "token") {
-                    quotaManager.showTokenLimitToast(data.used, data.limit)
-                    return
-                }
-                if (data.type === "tpm") {
-                    quotaManager.showTPMLimitToast(data.limit)
-                    return
-                }
-            } catch {
-                // Not JSON, fall through to string matching for backwards compatibility
-            }
-
-            // Fallback to string matching
-            if (error.message.includes("Daily request limit")) {
-                quotaManager.showQuotaLimitToast()
-                return
-            }
-            if (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)
-                // Debug: Log messages structure when error occurs
-                console.log("[onError] messages count:", messages.length)
-                messages.forEach((msg, idx) => {
-                    console.log(`[onError] Message ${idx}:`, {
-                        role: msg.role,
-                        partsCount: msg.parts?.length,
-                    })
-                    if (msg.parts) {
-                        msg.parts.forEach((part: any, partIdx: number) => {
-                            console.log(
-                                `[onError]   Part ${partIdx}:`,
-                                JSON.stringify({
-                                    type: part.type,
-                                    toolName: part.toolName,
-                                    hasInput: !!part.input,
-                                    inputType: typeof part.input,
-                                    inputKeys:
-                                        part.input &&
-                                        typeof part.input === "object"
-                                            ? Object.keys(part.input)
-                                            : null,
-                                }),
-                            )
-                        })
+    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
                     }
-                })
-            }
-
-            // 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 = "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 }],
+                    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
                 }
-                return [...currentMessages, errorMessage]
-            })
 
-            if (error.message.includes("Invalid or missing access code")) {
-                // Show settings dialog to help user fix it
-                setShowSettingsDialog(true)
-            }
-        },
-        onFinish: ({ message }) => {
-            // Track actual token usage from server metadata
-            const metadata = message?.metadata as
-                | Record<string, unknown>
-                | undefined
-
-            // DEBUG: Log finish reason to diagnose truncation
-            console.log("[onFinish] finishReason:", metadata?.finishReason)
-        },
-        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) {
+                // 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 (
-                    continuationRetryCountRef.current >=
-                    MAX_CONTINUATION_RETRY_COUNT
+                    error.message.includes("Rate limit exceeded") ||
+                    error.message.includes("tokens per minute")
                 ) {
-                    toast.error(
-                        `Continuation retry limit reached (${MAX_CONTINUATION_RETRY_COUNT}). The diagram may be too complex.`,
-                    )
+                    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)
+                    // Debug: Log messages structure when error occurs
+                    console.log("[onError] messages count:", messages.length)
+                    messages.forEach((msg, idx) => {
+                        console.log(`[onError] Message ${idx}:`, {
+                            role: msg.role,
+                            partsCount: msg.parts?.length,
+                        })
+                        if (msg.parts) {
+                            msg.parts.forEach((part: any, partIdx: number) => {
+                                console.log(
+                                    `[onError]   Part ${partIdx}:`,
+                                    JSON.stringify({
+                                        type: part.type,
+                                        toolName: part.toolName,
+                                        hasInput: !!part.input,
+                                        inputType: typeof part.input,
+                                        inputKeys:
+                                            part.input &&
+                                            typeof part.input === "object"
+                                                ? Object.keys(part.input)
+                                                : null,
+                                    }),
+                                )
+                            })
+                        }
+                    })
+                }
+
+                // 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 = "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: ({ message }) => {
+                // Track actual token usage from server metadata
+                const metadata = message?.metadata as
+                    | Record<string, unknown>
+                    | undefined
+
+                // DEBUG: Log finish reason to diagnose truncation
+                console.log("[onFinish] finishReason:", metadata?.finishReason)
+            },
+            sendAutomaticallyWhen: ({ messages }) => {
+                const isInContinuationMode = partialXmlRef.current.length > 0
+
+                const shouldRetry = hasToolErrors(
+                    messages as unknown as ChatMessage[],
+                )
+
+                if (!shouldRetry) {
+                    // No error, reset retry count and clear state
+                    autoRetryCountRef.current = 0
                     continuationRetryCountRef.current = 0
                     partialXmlRef.current = ""
                     return false
                 }
-                continuationRetryCountRef.current++
-            } else {
-                // Regular error: check retry count limit
-                if (autoRetryCountRef.current >= MAX_AUTO_RETRY_COUNT) {
-                    toast.error(
-                        `Auto-retry limit reached (${MAX_AUTO_RETRY_COUNT}). Please try again manually.`,
-                    )
-                    autoRetryCountRef.current = 0
-                    partialXmlRef.current = ""
-                    return false
-                }
-                // Increment retry count for actual errors
-                autoRetryCountRef.current++
-            }
 
-            return true
-        },
-    })
+                // Continuation mode: limited retries for truncation handling
+                if (isInContinuationMode) {
+                    if (
+                        continuationRetryCountRef.current >=
+                        MAX_CONTINUATION_RETRY_COUNT
+                    ) {
+                        toast.error(
+                            `Continuation retry limit reached (${MAX_CONTINUATION_RETRY_COUNT}). The diagram may be too complex.`,
+                        )
+                        continuationRetryCountRef.current = 0
+                        partialXmlRef.current = ""
+                        return false
+                    }
+                    continuationRetryCountRef.current++
+                } else {
+                    // Regular error: check retry count limit
+                    if (autoRetryCountRef.current >= MAX_AUTO_RETRY_COUNT) {
+                        toast.error(
+                            `Auto-retry limit reached (${MAX_AUTO_RETRY_COUNT}). Please try again manually.`,
+                        )
+                        autoRetryCountRef.current = 0
+                        partialXmlRef.current = ""
+                        return false
+                    }
+                    // Increment retry count for actual errors
+                    autoRetryCountRef.current++
+                }
+
+                return true
+            },
+        })
 
     // Ref to track latest messages for unload persistence
     const messagesRef = useRef(messages)
@@ -959,18 +949,32 @@ export default function ChatPanel({
                                 Next AI Drawio
                             </h1>
                         </div>
-                        {!isMobile &&
-                            process.env.NEXT_PUBLIC_SHOW_ABOUT_AND_NOTICE ===
-                                "true" && (
-                                <Link
-                                    href="/about"
-                                    target="_blank"
-                                    rel="noopener noreferrer"
-                                    className="text-sm text-muted-foreground hover:text-foreground transition-colors ml-2"
+                        {!isMobile && (
+                            <Link
+                                href="/about"
+                                target="_blank"
+                                rel="noopener noreferrer"
+                                className="text-sm text-muted-foreground hover:text-foreground transition-colors ml-2"
+                            >
+                                About
+                            </Link>
+                        )}
+                        {!isMobile && (
+                            <Link
+                                href="/about"
+                                target="_blank"
+                                rel="noopener noreferrer"
+                            >
+                                <ButtonWithTooltip
+                                    tooltipContent="Sponsored by ByteDance Doubao K2-thinking. See About page for details."
+                                    variant="ghost"
+                                    size="icon"
+                                    className="h-6 w-6 text-amber-500 hover:text-amber-600"
                                 >
-                                    About
-                                </Link>
-                            )}
+                                    <AlertTriangle className="h-4 w-4" />
+                                </ButtonWithTooltip>
+                            </Link>
+                        )}
                     </div>
                     <div className="flex items-center gap-1 justify-end overflow-visible">
                         <ButtonWithTooltip
@@ -984,23 +988,6 @@ export default function ChatPanel({
                                 className={`${isMobile ? "h-4 w-4" : "h-5 w-5"} text-muted-foreground`}
                             />
                         </ButtonWithTooltip>
-                        <div className="w-px h-5 bg-border mx-1" />
-
-                        <Tooltip>
-                            <TooltipTrigger asChild>
-                                <a
-                                    href="https://github.com/DayuanJiang/next-ai-draw-io"
-                                    target="_blank"
-                                    rel="noopener noreferrer"
-                                    className="inline-flex items-center justify-center h-9 w-9 rounded-md text-muted-foreground hover:text-foreground hover:bg-accent transition-colors"
-                                >
-                                    <FaGithub
-                                        className={`${isMobile ? "w-4 h-4" : "w-5 h-5"}`}
-                                    />
-                                </a>
-                            </TooltipTrigger>
-                            <TooltipContent>{dict.nav.github}</TooltipContent>
-                        </Tooltip>
 
                         <ButtonWithTooltip
                             tooltipContent={dict.nav.settings}
@@ -1050,6 +1037,9 @@ export default function ChatPanel({
                 <DevXmlSimulator
                     setMessages={setMessages}
                     onDisplayChart={onDisplayChart}
+                    onShowQuotaToast={() =>
+                        quotaManager.showQuotaLimitToast(50, 50)
+                    }
                 />
             )}
 
@@ -1066,12 +1056,8 @@ export default function ChatPanel({
                     files={files}
                     onFileChange={handleFileChange}
                     pdfData={pdfData}
-                    showHistory={showHistory}
-                    onToggleHistory={setShowHistory}
                     sessionId={sessionId}
                     error={error}
-                    minimalStyle={minimalStyle}
-                    onMinimalStyleChange={setMinimalStyle}
                     models={modelConfig.models}
                     selectedModelId={modelConfig.selectedModelId}
                     onModelSelect={modelConfig.setSelectedModelId}
@@ -1088,6 +1074,8 @@ export default function ChatPanel({
                 onToggleDrawioUi={onToggleDrawioUi}
                 darkMode={darkMode}
                 onToggleDarkMode={onToggleDarkMode}
+                minimalStyle={minimalStyle}
+                onMinimalStyleChange={setMinimalStyle}
             />
 
             <ModelConfigDialog

components/dev-xml-simulator.tsx

@@ -134,11 +134,13 @@ const DEV_XML_PRESETS: Record<string, string> = {
 interface DevXmlSimulatorProps {
     setMessages: React.Dispatch<React.SetStateAction<any[]>>
     onDisplayChart: (xml: string) => void
+    onShowQuotaToast?: () => void
 }
 
 export function DevXmlSimulator({
     setMessages,
     onDisplayChart,
+    onShowQuotaToast,
 }: DevXmlSimulatorProps) {
     const [devXml, setDevXml] = useState("")
     const [isSimulating, setIsSimulating] = useState(false)
@@ -342,6 +344,15 @@ export function DevXmlSimulator({
                                 Stop
                             </button>
                         )}
+                        {onShowQuotaToast && (
+                            <button
+                                type="button"
+                                onClick={onShowQuotaToast}
+                                className="px-3 py-1 text-xs bg-purple-500 text-white rounded hover:bg-purple-600"
+                            >
+                                Test Quota Toast
+                            </button>
+                        )}
                     </div>
                 </div>
             </details>

components/model-config-dialog.tsx

@@ -76,7 +76,9 @@ const PROVIDER_LOGO_MAP: Record<string, string> = {
     openrouter: "openrouter",
     deepseek: "deepseek",
     siliconflow: "siliconflow",
+    sglang: "openai", // SGLang is OpenAI-compatible
     gateway: "vercel",
+    doubao: "bytedance",
 }
 
 // Provider logo component
@@ -87,10 +89,16 @@ function ProviderLogo({
     provider: ProviderName
     className?: string
 }) {
-    // Use Lucide icon for bedrock since models.dev doesn't have a good AWS icon
+    // Use Lucide icons for providers without models.dev logos
     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 (

components/model-selector.tsx

@@ -8,7 +8,7 @@ import {
     Server,
     Settings2,
 } from "lucide-react"
-import { useMemo, useState } from "react"
+import { useEffect, useMemo, useRef, useState } from "react"
 import {
     ModelSelectorContent,
     ModelSelectorEmpty,
@@ -46,7 +46,9 @@ const PROVIDER_LOGO_MAP: Record<string, string> = {
     openrouter: "openrouter",
     deepseek: "deepseek",
     siliconflow: "siliconflow",
+    sglang: "openai", // SGLang is OpenAI-compatible, use OpenAI logo
     gateway: "vercel",
+    doubao: "bytedance",
 }
 
 // Group models by providerLabel (handles duplicate providers)
@@ -112,134 +114,189 @@ export function ModelSelector({
         ? `${selectedModel.modelId} ${dict.modelConfig.clickToChange}`
         : `${dict.modelConfig.usingServerDefault} ${dict.modelConfig.clickToChange}`
 
+    const wrapperRef = useRef<HTMLDivElement | null>(null)
+    const [showLabel, setShowLabel] = useState(true)
+
+    // Threshold (px) under which we hide the label (tweak as needed)
+    const HIDE_THRESHOLD = 240
+    const SHOW_THRESHOLD = 260
+    useEffect(() => {
+        const el = wrapperRef.current
+        if (!el) return
+
+        const target = el.parentElement ?? el
+
+        const ro = new ResizeObserver((entries) => {
+            for (const entry of entries) {
+                const width = entry.contentRect.width
+                setShowLabel((prev) => {
+                    // if currently showing and width dropped below hide threshold -> hide
+                    if (prev && width <= HIDE_THRESHOLD) return false
+                    // if currently hidden and width rose above show threshold -> show
+                    if (!prev && width >= SHOW_THRESHOLD) return true
+                    // otherwise keep previous state (hysteresis)
+                    return prev
+                })
+            }
+        })
+
+        ro.observe(target)
+
+        const initialWidth = target.getBoundingClientRect().width
+        setShowLabel(initialWidth >= SHOW_THRESHOLD)
+
+        return () => ro.disconnect()
+    }, [])
+
     return (
-        <ModelSelectorRoot open={open} onOpenChange={setOpen}>
-            <ModelSelectorTrigger asChild>
-                <ButtonWithTooltip
-                    tooltipContent={tooltipContent}
-                    variant="ghost"
-                    size="sm"
-                    disabled={disabled}
-                    className="hover:bg-accent gap-1.5 h-8 max-w-[180px] px-2"
-                >
-                    <Bot className="h-4 w-4 flex-shrink-0 text-muted-foreground" />
-                    <span className="text-xs truncate">
-                        {selectedModel
-                            ? selectedModel.modelId
-                            : dict.modelConfig.default}
-                    </span>
-                    <ChevronDown className="h-3 w-3 flex-shrink-0 text-muted-foreground" />
-                </ButtonWithTooltip>
-            </ModelSelectorTrigger>
-            <ModelSelectorContent title={dict.modelConfig.selectModel}>
-                <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 ref={wrapperRef} className="inline-block">
+            <ModelSelectorRoot open={open} onOpenChange={setOpen}>
+                <ModelSelectorTrigger asChild>
+                    <ButtonWithTooltip
+                        tooltipContent={tooltipContent}
+                        variant="ghost"
+                        size="sm"
+                        disabled={disabled}
+                        className={cn(
+                            "hover:bg-accent gap-1.5 h-8 px-2 transition-all duration-150 ease-in-out",
+                            !showLabel && "px-1.5 justify-center",
+                        )}
+                        // accessibility: expose label to screen readers
+                        aria-label={tooltipContent}
+                    >
+                        <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">
+                                {selectedModel
+                                    ? selectedModel.modelId
+                                    : dict.modelConfig.default}
+                            </span>
+                        ) : (
+                            // Keep an sr-only label for screen readers when hidden
+                            <span className="sr-only">
+                                {selectedModel
+                                    ? selectedModel.modelId
+                                    : dict.modelConfig.default}
+                            </span>
+                        )}
+                        <ChevronDown className="h-3 w-3 flex-shrink-0 text-muted-foreground" />
+                    </ButtonWithTooltip>
+                </ModelSelectorTrigger>
 
-                    {/* Server Default Option */}
-                    <ModelSelectorGroup heading={dict.modelConfig.default}>
-                        <ModelSelectorItem
-                            value="__server_default__"
-                            onSelect={handleSelect}
-                            className={cn(
-                                "cursor-pointer",
-                                !selectedModelId && "bg-accent",
-                            )}
-                        >
-                            <Check
+                <ModelSelectorContent title={dict.modelConfig.selectModel}>
+                    <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>
+
+                        {/* Server Default Option */}
+                        <ModelSelectorGroup heading={dict.modelConfig.default}>
+                            <ModelSelectorItem
+                                value="__server_default__"
+                                onSelect={handleSelect}
                                 className={cn(
-                                    "mr-2 h-4 w-4",
-                                    !selectedModelId
-                                        ? "opacity-100"
-                                        : "opacity-0",
+                                    "cursor-pointer",
+                                    !selectedModelId && "bg-accent",
                                 )}
-                            />
-                            <Server className="mr-2 h-4 w-4 text-muted-foreground" />
-                            <ModelSelectorName>
-                                {dict.modelConfig.serverDefault}
-                            </ModelSelectorName>
-                        </ModelSelectorItem>
-                    </ModelSelectorGroup>
-
-                    {/* Configured Models by Provider */}
-                    {Array.from(groupedModels.entries()).map(
-                        ([
-                            providerLabel,
-                            { provider, models: providerModels },
-                        ]) => (
-                            <ModelSelectorGroup
-                                key={providerLabel}
-                                heading={providerLabel}
                             >
-                                {providerModels.map((model) => (
-                                    <ModelSelectorItem
-                                        key={model.id}
-                                        value={model.modelId}
-                                        onSelect={() => handleSelect(model.id)}
-                                        className="cursor-pointer"
-                                    >
-                                        <Check
-                                            className={cn(
-                                                "mr-2 h-4 w-4",
-                                                selectedModelId === model.id
-                                                    ? "opacity-100"
-                                                    : "opacity-0",
-                                            )}
-                                        />
-                                        <ModelSelectorLogo
-                                            provider={
-                                                PROVIDER_LOGO_MAP[provider] ||
-                                                provider
-                                            }
-                                            className="mr-2"
-                                        />
-                                        <ModelSelectorName>
-                                            {model.modelId}
-                                        </ModelSelectorName>
-                                        {model.validated !== true && (
-                                            <span
-                                                title={
-                                                    dict.modelConfig
-                                                        .unvalidatedModelWarning
-                                                }
-                                            >
-                                                <AlertTriangle className="ml-auto h-3 w-3 text-warning" />
-                                            </span>
-                                        )}
-                                    </ModelSelectorItem>
-                                ))}
-                            </ModelSelectorGroup>
-                        ),
-                    )}
+                                <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>
 
-                    {/* Configure Option */}
-                    <ModelSelectorSeparator />
-                    <ModelSelectorGroup>
-                        <ModelSelectorItem
-                            value="__configure__"
-                            onSelect={handleSelect}
-                            className="cursor-pointer"
-                        >
-                            <Settings2 className="mr-2 h-4 w-4" />
-                            <ModelSelectorName>
-                                {dict.modelConfig.configureModels}
-                            </ModelSelectorName>
-                        </ModelSelectorItem>
-                    </ModelSelectorGroup>
-                    {/* Info text */}
-                    <div className="px-3 py-2 text-xs text-muted-foreground border-t">
-                        {showUnvalidatedModels
-                            ? dict.modelConfig.allModelsShown
-                            : dict.modelConfig.onlyVerifiedShown}
-                    </div>
-                </ModelSelectorList>
-            </ModelSelectorContent>
-        </ModelSelectorRoot>
+                        {/* Configured Models by Provider */}
+                        {Array.from(groupedModels.entries()).map(
+                            ([
+                                providerLabel,
+                                { provider, models: providerModels },
+                            ]) => (
+                                <ModelSelectorGroup
+                                    key={providerLabel}
+                                    heading={providerLabel}
+                                >
+                                    {providerModels.map((model) => (
+                                        <ModelSelectorItem
+                                            key={model.id}
+                                            value={model.modelId}
+                                            onSelect={() =>
+                                                handleSelect(model.id)
+                                            }
+                                            className="cursor-pointer"
+                                        >
+                                            <Check
+                                                className={cn(
+                                                    "mr-2 h-4 w-4",
+                                                    selectedModelId === model.id
+                                                        ? "opacity-100"
+                                                        : "opacity-0",
+                                                )}
+                                            />
+                                            <ModelSelectorLogo
+                                                provider={
+                                                    PROVIDER_LOGO_MAP[
+                                                        provider
+                                                    ] || provider
+                                                }
+                                                className="mr-2"
+                                            />
+                                            <ModelSelectorName>
+                                                {model.modelId}
+                                            </ModelSelectorName>
+                                            {model.validated !== true && (
+                                                <span
+                                                    title={
+                                                        dict.modelConfig
+                                                            .unvalidatedModelWarning
+                                                    }
+                                                >
+                                                    <AlertTriangle className="ml-auto h-3 w-3 text-warning" />
+                                                </span>
+                                            )}
+                                        </ModelSelectorItem>
+                                    ))}
+                                </ModelSelectorGroup>
+                            ),
+                        )}
+
+                        {/* Configure Option */}
+                        <ModelSelectorSeparator />
+                        <ModelSelectorGroup>
+                            <ModelSelectorItem
+                                value="__configure__"
+                                onSelect={handleSelect}
+                                className="cursor-pointer"
+                            >
+                                <Settings2 className="mr-2 h-4 w-4" />
+                                <ModelSelectorName>
+                                    {dict.modelConfig.configureModels}
+                                </ModelSelectorName>
+                            </ModelSelectorItem>
+                        </ModelSelectorGroup>
+                        {/* Info text */}
+                        <div className="px-3 py-2 text-xs text-muted-foreground border-t">
+                            {showUnvalidatedModels
+                                ? dict.modelConfig.allModelsShown
+                                : dict.modelConfig.onlyVerifiedShown}
+                        </div>
+                    </ModelSelectorList>
+                </ModelSelectorContent>
+            </ModelSelectorRoot>
+        </div>
     )
 }

components/quota-limit-toast.tsx

@@ -1,7 +1,6 @@
 "use client"
 
-import { Coffee, X } from "lucide-react"
-import Link from "next/link"
+import { Coffee, Settings, X } from "lucide-react"
 import type React from "react"
 import { FaGithub } from "react-icons/fa"
 import { useDictionary } from "@/hooks/use-dictionary"
@@ -12,6 +11,7 @@ interface QuotaLimitToastProps {
     used: number
     limit: number
     onDismiss: () => void
+    onConfigModel?: () => void
 }
 
 export function QuotaLimitToast({
@@ -19,6 +19,7 @@ export function QuotaLimitToast({
     used,
     limit,
     onDismiss,
+    onConfigModel,
 }: QuotaLimitToastProps) {
     const dict = useDictionary()
     const isTokenLimit = type === "token"
@@ -75,16 +76,36 @@ export function QuotaLimitToast({
                         ? dict.quota.messageToken
                         : dict.quota.messageApi}
                 </p>
+                <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",
+                        }),
+                    }}
+                />
                 <p dangerouslySetInnerHTML={{ __html: dict.quota.tip }} />
                 <p>{dict.quota.reset}</p>
             </div>{" "}
             {/* Action buttons */}
             <div className="flex items-center gap-2">
+                {onConfigModel && (
+                    <button
+                        type="button"
+                        onClick={() => {
+                            onConfigModel()
+                            onDismiss()
+                        }}
+                        className="inline-flex items-center gap-1.5 px-3 py-1.5 text-xs font-medium rounded-lg bg-primary text-primary-foreground hover:bg-primary/90 transition-colors"
+                    >
+                        <Settings className="w-3.5 h-3.5" />
+                        {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 bg-primary text-primary-foreground hover:bg-primary/90 transition-colors"
+                    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}

components/settings-dialog.tsx

@@ -1,6 +1,6 @@
 "use client"
 
-import { Moon, Sun } from "lucide-react"
+import { Github, Info, Moon, Sun, Tag } from "lucide-react"
 import { usePathname, useRouter, useSearchParams } from "next/navigation"
 import { Suspense, useEffect, useState } from "react"
 import { Button } from "@/components/ui/button"
@@ -24,7 +24,6 @@ import { Switch } from "@/components/ui/switch"
 import { useDictionary } from "@/hooks/use-dictionary"
 import { getApiEndpoint } from "@/lib/base-path"
 import { i18n, type Locale } from "@/lib/i18n/config"
-import { cn } from "@/lib/utils"
 
 // Reusable setting item component for consistent layout
 function SettingItem({
@@ -65,6 +64,8 @@ interface SettingsDialogProps {
     onToggleDrawioUi: () => void
     darkMode: boolean
     onToggleDarkMode: () => void
+    minimalStyle?: boolean
+    onMinimalStyleChange?: (value: boolean) => void
 }
 
 export const STORAGE_ACCESS_CODE_KEY = "next-ai-draw-io-access-code"
@@ -86,6 +87,8 @@ function SettingsContent({
     onToggleDrawioUi,
     darkMode,
     onToggleDarkMode,
+    minimalStyle = false,
+    onMinimalStyleChange = () => {},
 }: SettingsDialogProps) {
     const dict = useDictionary()
     const router = useRouter()
@@ -348,14 +351,61 @@ function SettingsContent({
                             }}
                         />
                     </SettingItem>
+
+                    {/* Diagram Style */}
+                    <SettingItem
+                        label={dict.settings.diagramStyle}
+                        description={dict.settings.diagramStyleDescription}
+                    >
+                        <div className="flex items-center gap-2">
+                            <Switch
+                                id="minimal-style"
+                                checked={minimalStyle}
+                                onCheckedChange={onMinimalStyleChange}
+                            />
+                            <span className="text-sm text-muted-foreground">
+                                {minimalStyle
+                                    ? dict.chat.minimalStyle
+                                    : dict.chat.styledMode}
+                            </span>
+                        </div>
+                    </SettingItem>
                 </div>
             </div>
 
             {/* Footer */}
             <div className="px-6 py-4 border-t border-border-subtle bg-surface-1/50 rounded-b-2xl">
-                <p className="text-xs text-muted-foreground text-center">
-                    Version {process.env.APP_VERSION}
-                </p>
+                <div className="flex items-center justify-center gap-3">
+                    <span className="text-xs text-muted-foreground flex items-center gap-1">
+                        <Tag className="h-3 w-3" />
+                        {process.env.APP_VERSION}
+                    </span>
+                    <span className="text-muted-foreground">·</span>
+                    <a
+                        href="https://github.com/DayuanJiang/next-ai-draw-io"
+                        target="_blank"
+                        rel="noopener noreferrer"
+                        className="text-xs text-muted-foreground hover:text-foreground transition-colors flex items-center gap-1"
+                    >
+                        <Github className="h-3 w-3" />
+                        GitHub
+                    </a>
+                    {process.env.NEXT_PUBLIC_SHOW_ABOUT_AND_NOTICE ===
+                        "true" && (
+                        <>
+                            <span className="text-muted-foreground">·</span>
+                            <a
+                                href="/about"
+                                target="_blank"
+                                rel="noopener noreferrer"
+                                className="text-xs text-muted-foreground hover:text-foreground transition-colors flex items-center gap-1"
+                            >
+                                <Info className="h-3 w-3" />
+                                About
+                            </a>
+                        </>
+                    )}
+                </div>
             </div>
         </DialogContent>
     )

docs/README_CN.md

@@ -19,6 +19,8 @@
 
 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！
+
 https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979
 
 ## 目录
@@ -127,8 +129,6 @@ claude mcp add drawio -- npx @next-ai-drawio/mcp-server@latest
 
 [![Live Demo](../public/live-demo-button.svg)](https://next-ai-drawio.jiang.jp/)
 
-> 注意：由于访问量较大，演示站点目前使用 minimax-m2 模型。如需获得最佳效果，建议使用 Claude Sonnet 4.5 或 Claude Opus 4.5 自行部署。
-
 > **使用自己的 API Key**：您可以使用自己的 API Key 来绕过演示站点的用量限制。点击聊天面板中的设置图标即可配置您的 Provider 和 API Key。您的 Key 仅保存在浏览器本地，不会被存储在服务器上。
 
 ### 使用Docker运行（推荐）
@@ -186,7 +186,7 @@ cp env.example .env.local
 
 编辑 `.env.local` 并配置您选择的提供商：
 
--   将 `AI_PROVIDER` 设置为您选择的提供商（bedrock, openai, anthropic, google, azure, ollama, openrouter, deepseek, siliconflow）
+-   将 `AI_PROVIDER` 设置为您选择的提供商（bedrock, openai, anthropic, google, azure, ollama, openrouter, deepseek, siliconflow, doubao）
 -   将 `AI_MODEL` 设置为您要使用的特定模型
 -   添加您的提供商所需的API密钥
 -   `TEMPERATURE`：可选的温度设置（例如 `0` 表示确定性输出）。对于不支持此参数的模型（如推理模型），请不要设置。
@@ -218,6 +218,7 @@ 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)
 -   AWS Bedrock（默认）
 -   OpenAI
 -   Anthropic
@@ -268,6 +269,8 @@ public/               # 静态资源包括示例图片
 
 ## 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！
+
 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！
 
 如需支持或咨询，请在GitHub仓库上提交issue或联系维护者：

docs/README_JA.md

@@ -19,6 +19,8 @@
 
 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！
+
 https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979
 
 ## 目次
@@ -127,8 +129,6 @@ Claudeにダイアグラムの作成を依頼：
 
 [![Live Demo](../public/live-demo-button.svg)](https://next-ai-drawio.jiang.jp/)
 
-> 注意：アクセス数が多いため、デモサイトでは現在 minimax-m2 モデルを使用しています。最高の結果を得るには、Claude Sonnet 4.5 または Claude Opus 4.5 でのセルフホスティングをお勧めします。
-
 > **自分のAPIキーを使用**：自分のAPIキーを使用することで、デモサイトの利用制限を回避できます。チャットパネルの設定アイコンをクリックして、プロバイダーとAPIキーを設定してください。キーはブラウザのローカルに保存され、サーバーには保存されません。
 
 ### Dockerで実行（推奨）
@@ -186,7 +186,7 @@ cp env.example .env.local
 
 `.env.local`を編集して選択したプロバイダーを設定：
 
--   `AI_PROVIDER`を選択したプロバイダーに設定（bedrock, openai, anthropic, google, azure, ollama, openrouter, deepseek, siliconflow）
+-   `AI_PROVIDER`を選択したプロバイダーに設定（bedrock, openai, anthropic, google, azure, ollama, openrouter, deepseek, siliconflow, doubao）
 -   `AI_MODEL`を使用する特定のモデルに設定
 -   プロバイダーに必要なAPIキーを追加
 -   `TEMPERATURE`：オプションの温度設定（例：`0`で決定論的な出力）。温度をサポートしないモデル（推論モデルなど）では設定しないでください。
@@ -218,6 +218,7 @@ 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)
 -   AWS Bedrock（デフォルト）
 -   OpenAI
 -   Anthropic
@@ -268,6 +269,8 @@ public/               # サンプル画像を含む静的アセット
 
 ## 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！
+
 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！
 
 サポートやお問い合わせについては、GitHubリポジトリでissueを開くか、メンテナーにご連絡ください：

docs/ai-providers.md

@@ -11,6 +11,15 @@ This guide explains how to configure different AI model providers for next-ai-dr
 
 ## Supported Providers
 
+### 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!
+
+```bash
+DOUBAO_API_KEY=your_api_key
+AI_MODEL=doubao-seed-1-8-251215  # or other Doubao model
+```
+
 ### Google Gemini
 
 ```bash
@@ -76,6 +85,8 @@ Optional custom endpoint (defaults to the recommended domain):
 SILICONFLOW_BASE_URL=https://api.siliconflow.com/v1  # or https://api.siliconflow.cn/v1
 ```
 
+
+
 ### Azure OpenAI
 
 ```bash
@@ -179,7 +190,7 @@ 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, azure, bedrock, openrouter, ollama, gateway
+AI_PROVIDER=google  # or: openai, anthropic, deepseek, siliconflow, doubao, azure, bedrock, openrouter, ollama, gateway
 ```
 
 ## Model Capability Requirements

env.example

@@ -72,6 +72,10 @@ 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
 
+# 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
+
 # Vercel AI Gateway Configuration
 # Get your API key from: https://vercel.com/ai-gateway
 # Model format: "provider/model" e.g., "openai/gpt-4o", "anthropic/claude-sonnet-4-5"

lib/ai-providers.ts

@@ -21,6 +21,7 @@ export type ProviderName =
     | "siliconflow"
     | "sglang"
     | "gateway"
+    | "doubao"
 
 interface ModelConfig {
     model: any
@@ -53,6 +54,7 @@ const ALLOWED_CLIENT_PROVIDERS: ProviderName[] = [
     "siliconflow",
     "sglang",
     "gateway",
+    "doubao",
 ]
 
 // Bedrock provider options for Anthropic beta features
@@ -346,7 +348,8 @@ function buildProviderOptions(
         case "openrouter":
         case "siliconflow":
         case "sglang":
-        case "gateway": {
+        case "gateway":
+        case "doubao": {
             // These providers don't have reasoning configs in AI SDK yet
             // Gateway passes through to underlying providers which handle their own configs
             break
@@ -372,6 +375,7 @@ const PROVIDER_ENV_VARS: Record<ProviderName, string | null> = {
     siliconflow: "SILICONFLOW_API_KEY",
     sglang: "SGLANG_API_KEY",
     gateway: "AI_GATEWAY_API_KEY",
+    doubao: "DOUBAO_API_KEY",
 }
 
 /**
@@ -836,9 +840,23 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
             break
         }
 
+        case "doubao": {
+            const apiKey = overrides?.apiKey || process.env.DOUBAO_API_KEY
+            const baseURL =
+                overrides?.baseUrl ||
+                process.env.DOUBAO_BASE_URL ||
+                "https://ark.cn-beijing.volces.com/api/v3"
+            const doubaoProvider = createDeepSeek({
+                apiKey,
+                baseURL,
+            })
+            model = doubaoProvider(modelId)
+            break
+        }
+
         default:
             throw new Error(
-                `Unknown AI provider: ${provider}. Supported providers: bedrock, openai, anthropic, google, azure, ollama, openrouter, deepseek, siliconflow, sglang, gateway`,
+                `Unknown AI provider: ${provider}. Supported providers: bedrock, openai, anthropic, google, azure, ollama, openrouter, deepseek, siliconflow, sglang, gateway, doubao`,
             )
     }
 

lib/i18n/dictionaries/en.json

@@ -98,7 +98,13 @@
         "minimal": "Minimal",
         "sketch": "Sketch",
         "closeProtection": "Close Protection",
-        "closeProtectionDescription": "Show confirmation when leaving the page."
+        "closeProtectionDescription": "Show confirmation when leaving the page.",
+        "diagramStyle": "Diagram Style",
+        "diagramStyleDescription": "Toggle between minimal and styled diagram output.",
+        "diagramActions": "Diagram Actions",
+        "diagramActionsDescription": "Manage diagram history and exports",
+        "history": "History",
+        "download": "Download"
     },
     "save": {
         "title": "Save Diagram",
@@ -151,10 +157,12 @@
         "tpmLimit": "Rate Limit",
         "tpmMessage": "Too many requests. Please wait a moment.",
         "tpmMessageDetailed": "Rate limit reached ({limit} tokens/min). Please wait {seconds} seconds before sending another request.",
-        "messageApi": "Oops — you've reached the daily API limit for this demo! As an indie developer covering all the API costs myself, I have to set these limits to keep things sustainable.",
-        "messageToken": "Oops — you've reached the daily token limit for this demo! As an indie developer covering all the API costs myself, I have to set these limits to keep things sustainable.",
+        "messageApi": "Looks like you've reached today's demo limit. We're thrilled you're enjoying it, and while ByteDance Doubao generously sponsors this demo, we've had to set a few boundaries to keep things fair for everyone.",
+        "messageToken": "Looks like you've reached today's token limit. We're thrilled you're enjoying it, and while ByteDance Doubao generously sponsors this demo, we've had to set a few boundaries to keep things fair for everyone.",
         "tip": "<strong>Tip:</strong> You can use your own API key (click the Settings icon) or self-host the project to bypass these limits.",
-        "reset": "Your limit resets tomorrow. Thanks for understanding!",
+        "reset": "Your limit resets tomorrow. Thanks for understanding.",
+        "doubaoSponsorship": "<a href=\"{link}\" target=\"_blank\" rel=\"noopener noreferrer\" class=\"underline hover:text-foreground\">Register here</a> to get 500K free tokens per model (including Doubao, DeepSeek and Kimi), then configure your API key in model settings.",
+        "configModel": "Use Your API Key",
         "selfHost": "Self-host",
         "sponsor": "Sponsor",
         "learnMore": "Learn more →",

lib/i18n/dictionaries/ja.json

@@ -98,7 +98,13 @@
         "minimal": "ミニマル",
         "sketch": "スケッチ",
         "closeProtection": "ページ離脱確認",
-        "closeProtectionDescription": "ページを離れる際に確認を表示します。"
+        "closeProtectionDescription": "ページを離れる際に確認を表示します。",
+        "diagramStyle": "ダイアグラムスタイル",
+        "diagramStyleDescription": "ミニマルとスタイル付きの出力を切り替えます。",
+        "diagramActions": "ダイアグラム操作",
+        "diagramActionsDescription": "ダイアグラムの履歴とエクスポートを管理",
+        "history": "履歴",
+        "download": "ダウンロード"
     },
     "save": {
         "title": "ダイアグラムを保存",
@@ -151,10 +157,12 @@
         "tpmLimit": "レート制限",
         "tpmMessage": "リクエストが多すぎます。しばらくお待ちください。",
         "tpmMessageDetailed": "レート制限に達しました（{limit}トークン/分）。{seconds}秒待ってからもう一度リクエストしてください。",
-        "messageApi": "おっと — このデモの1日の API 制限に達しました！個人開発者として API コストをすべて負担しているため、持続可能性を保つためにこれらの制限を設定する必要があります。",
-        "messageToken": "おっと — このデモの1日のトークン制限に達しました！個人開発者として API コストをすべて負担しているため、持続可能性を保つためにこれらの制限を設定する必要があります。",
+        "messageApi": "今日のデモ利用上限に達してしまったようです。楽しんでいただけて本当に嬉しいです。このデモはByteDance Doubaoのご厚意により提供されていますが、皆様に公平にご利用いただくため、少し制限を設けさせていただいております。",
+        "messageToken": "今日のトークン利用上限に達してしまったようです。楽しんでいただけて本当に嬉しいです。このデモはByteDance Doubaoのご厚意により提供されていますが、皆様に公平にご利用いただくため、少し制限を設けさせていただいております。",
         "tip": "<strong>ヒント：</strong>独自の API キーを使用する（設定アイコンをクリック）か、プロジェクトをセルフホストしてこれらの制限を回避できます。",
-        "reset": "制限は明日リセットされます。ご理解ありがとうございます！",
+        "reset": "制限は明日リセットされます。ご理解ありがとうございます。",
+        "doubaoSponsorship": "<a href=\"{link}\" target=\"_blank\" rel=\"noopener noreferrer\" class=\"underline hover:text-foreground\">こちらから登録</a>すると、各モデル（Doubao、DeepSeek、Kimi含む）で50万トークンを無料で取得できます。モデル設定でAPIキーを設定してください。",
+        "configModel": "APIキーを使用",
         "selfHost": "セルフホスト",
         "sponsor": "スポンサー",
         "learnMore": "詳細 →",

lib/i18n/dictionaries/zh.json

@@ -98,7 +98,13 @@
         "minimal": "简约",
         "sketch": "草图",
         "closeProtection": "关闭确认",
-        "closeProtectionDescription": "离开页面时显示确认。"
+        "closeProtectionDescription": "离开页面时显示确认。",
+        "diagramStyle": "图表样式",
+        "diagramStyleDescription": "切换简约与精致图表输出模式。",
+        "diagramActions": "图表操作",
+        "diagramActionsDescription": "管理图表历史记录和导出",
+        "history": "历史记录",
+        "download": "下载"
     },
     "save": {
         "title": "保存图表",
@@ -151,10 +157,12 @@
         "tpmLimit": "速率限制",
         "tpmMessage": "请求过多。请稍等片刻。",
         "tpmMessageDetailed": "达到速率限制（{limit} 令牌/分钟）。请等待 {seconds} 秒后再发送请求。",
-        "messageApi": "糟糕 — 您已达到此演示的每日 API 限制！作为一名独立开发者，我自己承担所有 API 费用，因此必须设置这些限制以保持可持续性。",
-        "messageToken": "糟糕 — 您已达到此演示的每日令牌限制！作为一名独立开发者，我自己承担所有 API 费用，因此必须设置这些限制以保持可持续性。",
+        "messageApi": "看来您今天的体验次数已达上限。非常高兴您玩得开心，虽然本项目由字节跳动豆包慷慨赞助，但为了确保大家都能公平使用，我们不得不对使用量做一点小小的限制。",
+        "messageToken": "看来您今天的 Token 用量已达上限。非常高兴您玩得开心，虽然本项目由字节跳动豆包慷慨赞助，但为了确保大家都能公平使用，我们不得不对使用量做一点小小的限制。",
         "tip": "<strong>提示：</strong>您可以使用自己的 API 密钥（点击设置图标）或自托管项目来绕过这些限制。",
-        "reset": "您的限制将在明天重置。感谢您的理解！",
+        "reset": "您的限制将在明天重置。感谢您的理解。",
+        "doubaoSponsorship": "<a href=\"{link}\" target=\"_blank\" rel=\"noopener noreferrer\" class=\"underline hover:text-foreground\">点击此处注册</a>可获得每个模型 50 万免费 Token（包括豆包、DeepSeek 和 Kimi），然后在模型设置中配置您的 API Key。",
+        "configModel": "使用您的密钥",
         "selfHost": "自托管",
         "sponsor": "赞助",
         "learnMore": "了解更多 →",

lib/system-prompts.ts

@@ -276,7 +276,7 @@ edit_diagram uses ID-based operations to modify cells directly by their id attri
 **Operations:**
 - **update**: Replace an existing cell. Provide cell_id and new_xml.
 - **add**: Add a new cell. Provide cell_id (new unique id) and new_xml.
-- **delete**: Remove a cell. Only cell_id is needed.
+- **delete**: Remove a cell. **Cascade is automatic**: children AND edges (source/target) are auto-deleted. Only specify ONE cell_id.
 
 **Input Format:**
 \`\`\`json
@@ -301,9 +301,9 @@ Add new shape:
 {"operations": [{"operation": "add", "cell_id": "new1", "new_xml": "<mxCell id=\\"new1\\" value=\\"New Box\\" style=\\"rounded=1;fillColor=#dae8fc;\\" vertex=\\"1\\" parent=\\"1\\">\\n  <mxGeometry x=\\"400\\" y=\\"200\\" width=\\"120\\" height=\\"60\\" as=\\"geometry\\"/>\\n</mxCell>"}]}
 \`\`\`
 
-Delete cell:
+Delete container (children & edges auto-deleted):
 \`\`\`json
-{"operations": [{"operation": "delete", "cell_id": "5"}]}
+{"operations": [{"operation": "delete", "cell_id": "2"}]}
 \`\`\`
 
 **Error Recovery:**

lib/types/model-config.ts

@@ -9,7 +9,9 @@ export type ProviderName =
     | "openrouter"
     | "deepseek"
     | "siliconflow"
+    | "sglang"
     | "gateway"
+    | "doubao"
 
 // Individual model configuration
 export interface ModelConfig {
@@ -78,7 +80,15 @@ export const PROVIDER_INFO: Record<
         label: "SiliconFlow",
         defaultBaseUrl: "https://api.siliconflow.com/v1",
     },
+    sglang: {
+        label: "SGLang",
+        defaultBaseUrl: "http://127.0.0.1:8000/v1",
+    },
     gateway: { label: "AI Gateway" },
+    doubao: {
+        label: "Doubao (ByteDance)",
+        defaultBaseUrl: "https://ark.cn-beijing.volces.com/api/v3",
+    },
 }
 
 // Suggested models per provider for quick add
@@ -198,6 +208,10 @@ export const SUGGESTED_MODELS: Record<ProviderName, string[]> = {
         "Qwen/Qwen2.5-7B-Instruct",
         "Qwen/Qwen2-VL-72B-Instruct",
     ],
+    sglang: [
+        // SGLang is OpenAI-compatible, models depend on deployment
+        "default",
+    ],
     gateway: [
         "openai/gpt-4o",
         "openai/gpt-4o-mini",
@@ -205,6 +219,15 @@ export const SUGGESTED_MODELS: Record<ProviderName, string[]> = {
         "anthropic/claude-3-5-sonnet",
         "google/gemini-2.0-flash",
     ],
+    doubao: [
+        // ByteDance Doubao models
+        "doubao-1.5-thinking-pro-250415",
+        "doubao-1.5-thinking-pro-m-250428",
+        "doubao-1.5-pro-32k-250115",
+        "doubao-1.5-pro-256k-250115",
+        "doubao-pro-32k-241215",
+        "doubao-pro-256k-241215",
+    ],
 }
 
 // Helper to generate UUID

lib/use-quota-manager.tsx

@@ -10,6 +10,7 @@ export interface QuotaConfig {
     dailyRequestLimit: number
     dailyTokenLimit: number
     tpmLimit: number
+    onConfigModel?: () => void
 }
 
 /**
@@ -22,7 +23,8 @@ export function useQuotaManager(config: QuotaConfig): {
     showTokenLimitToast: (used?: number, limit?: number) => void
     showTPMLimitToast: (limit?: number) => void
 } {
-    const { dailyRequestLimit, dailyTokenLimit, tpmLimit } = config
+    const { dailyRequestLimit, dailyTokenLimit, tpmLimit, onConfigModel } =
+        config
     const dict = useDictionary()
 
     // Show quota limit toast (request-based)
@@ -34,12 +36,13 @@ export function useQuotaManager(config: QuotaConfig): {
                         used={used ?? dailyRequestLimit}
                         limit={limit ?? dailyRequestLimit}
                         onDismiss={() => toast.dismiss(t)}
+                        onConfigModel={onConfigModel}
                     />
                 ),
                 { duration: 15000 },
             )
         },
-        [dailyRequestLimit],
+        [dailyRequestLimit, onConfigModel],
     )
 
     // Show token limit toast
@@ -52,12 +55,13 @@ export function useQuotaManager(config: QuotaConfig): {
                         used={used ?? dailyTokenLimit}
                         limit={limit ?? dailyTokenLimit}
                         onDismiss={() => toast.dismiss(t)}
+                        onConfigModel={onConfigModel}
                     />
                 ),
                 { duration: 15000 },
             )
         },
-        [dailyTokenLimit],
+        [dailyTokenLimit, onConfigModel],
     )
 
     // Show TPM limit toast

lib/utils.ts

@@ -633,32 +633,77 @@ export function applyDiagramOperations(
             // Add to map
             cellMap.set(op.cell_id, importedNode)
         } else if (op.operation === "delete") {
-            const existingCell = cellMap.get(op.cell_id)
-            if (!existingCell) {
+            // Protect root cells from deletion
+            if (op.cell_id === "0" || op.cell_id === "1") {
                 errors.push({
                     type: "delete",
                     cellId: op.cell_id,
-                    message: `Cell with id="${op.cell_id}" not found`,
+                    message: `Cannot delete root cell "${op.cell_id}"`,
                 })
                 continue
             }
 
-            // Check for edges referencing this cell (warning only, still delete)
-            const referencingEdges = root.querySelectorAll(
-                `mxCell[source="${op.cell_id}"], mxCell[target="${op.cell_id}"]`,
-            )
-            if (referencingEdges.length > 0) {
-                const edgeIds = Array.from(referencingEdges)
-                    .map((e) => e.getAttribute("id"))
-                    .join(", ")
-                console.warn(
-                    `[applyDiagramOperations] Deleting cell "${op.cell_id}" which is referenced by edges: ${edgeIds}`,
+            const existingCell = cellMap.get(op.cell_id)
+            if (!existingCell) {
+                // Cell not found - might have been cascade-deleted by a previous operation
+                // Skip silently instead of erroring (AI may redundantly list children/edges)
+                continue
+            }
+
+            // Cascade delete: collect all cells to delete (children + edges + self)
+            const cellsToDelete = new Set<string>()
+
+            // Recursive function to find all descendants
+            const collectDescendants = (cellId: string) => {
+                if (cellsToDelete.has(cellId)) return
+                cellsToDelete.add(cellId)
+
+                // Find children (cells where parent === cellId)
+                const children = root.querySelectorAll(
+                    `mxCell[parent="${cellId}"]`,
+                )
+                children.forEach((child) => {
+                    const childId = child.getAttribute("id")
+                    if (childId && childId !== "0" && childId !== "1") {
+                        collectDescendants(childId)
+                    }
+                })
+            }
+
+            // Collect the target cell and all its descendants
+            collectDescendants(op.cell_id)
+
+            // Find edges referencing any of the cells to be deleted
+            // Also recursively collect children of those edges (e.g., edge labels)
+            for (const cellId of cellsToDelete) {
+                const referencingEdges = root.querySelectorAll(
+                    `mxCell[source="${cellId}"], mxCell[target="${cellId}"]`,
+                )
+                referencingEdges.forEach((edge) => {
+                    const edgeId = edge.getAttribute("id")
+                    // Protect root cells from being added via edge references
+                    if (edgeId && edgeId !== "0" && edgeId !== "1") {
+                        // Recurse to collect edge's children (like labels)
+                        collectDescendants(edgeId)
+                    }
+                })
+            }
+
+            // Log what will be deleted
+            if (cellsToDelete.size > 1) {
+                console.log(
+                    `[applyDiagramOperations] Cascade delete "${op.cell_id}" → deleting ${cellsToDelete.size} cells: ${Array.from(cellsToDelete).join(", ")}`,
                 )
             }
 
-            // Remove the node
-            existingCell.parentNode?.removeChild(existingCell)
-            cellMap.delete(op.cell_id)
+            // Delete all collected cells
+            for (const cellId of cellsToDelete) {
+                const cell = cellMap.get(cellId)
+                if (cell) {
+                    cell.parentNode?.removeChild(cell)
+                    cellMap.delete(cellId)
+                }
+            }
         }
     }
 

package.json

@@ -21,11 +21,11 @@
         "electron:compile": "npx esbuild electron/main/index.ts electron/preload/index.ts electron/preload/settings.ts --bundle --platform=node --outdir=dist-electron --external:electron --sourcemap --packages=external && npx shx cp -r electron/settings dist-electron/",
         "electron:start": "npx cross-env NODE_ENV=development npx electron .",
         "electron:prepare": "node scripts/prepare-electron-build.mjs",
-        "dist": "npm run electron:build && npm run electron:prepare && npx electron-builder",
-        "dist:mac": "npm run electron:build && npm run electron:prepare && npx electron-builder --mac",
-        "dist:win": "npm run electron:build && npm run electron:prepare && npx electron-builder --win",
-        "dist:linux": "npm run electron:build && npm run electron:prepare && npx electron-builder --linux",
-        "dist:all": "npm run electron:build && npm run electron:prepare && npx electron-builder --mac --win --linux"
+        "dist": "npm run electron:build && npm run electron:prepare && npx electron-builder --config electron/electron-builder.yml",
+        "dist:mac": "npm run electron:build && npm run electron:prepare && npx electron-builder --config electron/electron-builder.yml --mac",
+        "dist:win": "npm run electron:build && npm run electron:prepare && npx electron-builder --config electron/electron-builder.yml --win",
+        "dist:linux": "npm run electron:build && npm run electron:prepare && npx electron-builder --config electron/electron-builder.yml --linux",
+        "dist:all": "npm run electron:build && npm run electron:prepare && npx electron-builder --config electron/electron-builder.yml --mac --win --linux"
     },
     "dependencies": {
         "@ai-sdk/amazon-bedrock": "^4.0.1",
@@ -65,7 +65,7 @@
         "clsx": "^2.1.1",
         "cmdk": "^1.1.1",
         "js-tiktoken": "^1.0.21",
-        "jsdom": "^26.0.0",
+        "jsdom": "^27.0.0",
         "jsonrepair": "^3.13.1",
         "lucide-react": "^0.562.0",
         "motion": "^12.23.25",
@@ -100,7 +100,7 @@
         "@tailwindcss/postcss": "^4",
         "@tailwindcss/typography": "^0.5.19",
         "@types/negotiator": "^0.6.4",
-        "@types/node": "^20",
+        "@types/node": "^24.0.0",
         "@types/pako": "^2.0.3",
         "@types/react": "^19",
         "@types/react-dom": "^19",

packages/mcp-server/README.md

@@ -97,7 +97,7 @@ Use the standard MCP configuration with:
 | Tool | Description |
 |------|-------------|
 | `start_session` | Opens browser with real-time diagram preview |
-| `display_diagram` | Create a new diagram from XML |
+| `create_new_diagram` | Create a new diagram from XML (requires `xml` argument) |
 | `edit_diagram` | Edit diagram by ID-based operations (update/add/delete cells) |
 | `get_diagram` | Get the current diagram XML |
 | `export_diagram` | Save diagram to a `.drawio` file |

packages/mcp-server/package-lock.json

@@ -11,14 +11,14 @@
             "dependencies": {
                 "@modelcontextprotocol/sdk": "^1.0.4",
                 "linkedom": "^0.18.0",
-                "open": "^10.1.0",
+                "open": "^11.0.0",
                 "zod": "^3.24.0"
             },
             "bin": {
                 "next-ai-drawio-mcp": "dist/index.js"
             },
             "devDependencies": {
-                "@types/node": "^20",
+                "@types/node": "^24.0.0",
                 "tsx": "^4.19.0",
                 "typescript": "^5"
             },
@@ -520,13 +520,13 @@
             }
         },
         "node_modules/@types/node": {
-            "version": "20.19.27",
-            "resolved": "https://registry.npmjs.org/@types/node/-/node-20.19.27.tgz",
-            "integrity": "sha512-N2clP5pJhB2YnZJ3PIHFk5RkygRX5WO/5f0WC08tp0wd+sv0rsJk3MqWn3CbNmT2J505a5336jaQj4ph1AdMug==",
+            "version": "24.10.4",
+            "resolved": "https://registry.npmjs.org/@types/node/-/node-24.10.4.tgz",
+            "integrity": "sha512-vnDVpYPMzs4wunl27jHrfmwojOGKya0xyM3sH+UE5iv5uPS6vX7UIoh6m+vQc5LGBq52HBKPIn/zcSZVzeDEZg==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
-                "undici-types": "~6.21.0"
+                "undici-types": "~7.16.0"
             }
         },
         "node_modules/accepts": {
@@ -1372,6 +1372,18 @@
                 "url": "https://github.com/sponsors/sindresorhus"
             }
         },
+        "node_modules/is-in-ssh": {
+            "version": "1.0.0",
+            "resolved": "https://registry.npmjs.org/is-in-ssh/-/is-in-ssh-1.0.0.tgz",
+            "integrity": "sha512-jYa6Q9rH90kR1vKB6NM7qqd1mge3Fx4Dhw5TVlK1MUBqhEOuCagrEHMevNuCcbECmXZ0ThXkRm+Ymr51HwEPAw==",
+            "license": "MIT",
+            "engines": {
+                "node": ">=20"
+            },
+            "funding": {
+                "url": "https://github.com/sponsors/sindresorhus"
+            }
+        },
         "node_modules/is-inside-container": {
             "version": "1.0.0",
             "resolved": "https://registry.npmjs.org/is-inside-container/-/is-inside-container-1.0.0.tgz",
@@ -1587,18 +1599,20 @@
             }
         },
         "node_modules/open": {
-            "version": "10.2.0",
-            "resolved": "https://registry.npmjs.org/open/-/open-10.2.0.tgz",
-            "integrity": "sha512-YgBpdJHPyQ2UE5x+hlSXcnejzAvD0b22U2OuAP+8OnlJT+PjWPxtgmGqKKc+RgTM63U9gN0YzrYc71R2WT/hTA==",
+            "version": "11.0.0",
+            "resolved": "https://registry.npmjs.org/open/-/open-11.0.0.tgz",
+            "integrity": "sha512-smsWv2LzFjP03xmvFoJ331ss6h+jixfA4UUV/Bsiyuu4YJPfN+FIQGOIiv4w9/+MoHkfkJ22UIaQWRVFRfH6Vw==",
             "license": "MIT",
             "dependencies": {
-                "default-browser": "^5.2.1",
+                "default-browser": "^5.4.0",
                 "define-lazy-prop": "^3.0.0",
+                "is-in-ssh": "^1.0.0",
                 "is-inside-container": "^1.0.0",
-                "wsl-utils": "^0.1.0"
+                "powershell-utils": "^0.1.0",
+                "wsl-utils": "^0.3.0"
             },
             "engines": {
-                "node": ">=18"
+                "node": ">=20"
             },
             "funding": {
                 "url": "https://github.com/sponsors/sindresorhus"
@@ -1641,6 +1655,18 @@
                 "node": ">=16.20.0"
             }
         },
+        "node_modules/powershell-utils": {
+            "version": "0.1.0",
+            "resolved": "https://registry.npmjs.org/powershell-utils/-/powershell-utils-0.1.0.tgz",
+            "integrity": "sha512-dM0jVuXJPsDN6DvRpea484tCUaMiXWjuCn++HGTqUWzGDjv5tZkEZldAJ/UMlqRYGFrD/etByo4/xOuC/snX2A==",
+            "license": "MIT",
+            "engines": {
+                "node": ">=20"
+            },
+            "funding": {
+                "url": "https://github.com/sponsors/sindresorhus"
+            }
+        },
         "node_modules/proxy-addr": {
             "version": "2.0.7",
             "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.7.tgz",
@@ -1963,9 +1989,9 @@
             "license": "ISC"
         },
         "node_modules/undici-types": {
-            "version": "6.21.0",
-            "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
-            "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+            "version": "7.16.0",
+            "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.16.0.tgz",
+            "integrity": "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw==",
             "dev": true,
             "license": "MIT"
         },
@@ -2009,15 +2035,16 @@
             "license": "ISC"
         },
         "node_modules/wsl-utils": {
-            "version": "0.1.0",
-            "resolved": "https://registry.npmjs.org/wsl-utils/-/wsl-utils-0.1.0.tgz",
-            "integrity": "sha512-h3Fbisa2nKGPxCpm89Hk33lBLsnaGBvctQopaBSOW/uIs6FTe1ATyAnKFJrzVs9vpGdsTe73WF3V4lIsk4Gacw==",
+            "version": "0.3.0",
+            "resolved": "https://registry.npmjs.org/wsl-utils/-/wsl-utils-0.3.0.tgz",
+            "integrity": "sha512-3sFIGLiaDP7rTO4xh3g+b3AzhYDIUGGywE/WsmqzJWDxus5aJXVnPTNC/6L+r2WzrwXqVOdD262OaO+cEyPMSQ==",
             "license": "MIT",
             "dependencies": {
-                "is-wsl": "^3.1.0"
+                "is-wsl": "^3.1.0",
+                "powershell-utils": "^0.1.0"
             },
             "engines": {
-                "node": ">=18"
+                "node": ">=20"
             },
             "funding": {
                 "url": "https://github.com/sponsors/sindresorhus"

packages/mcp-server/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@next-ai-drawio/mcp-server",
-    "version": "0.1.6",
+    "version": "0.1.10",
     "description": "MCP server for Next AI Draw.io - AI-powered diagram generation with real-time browser preview",
     "type": "module",
     "main": "dist/index.js",
@@ -38,11 +38,11 @@
     "dependencies": {
         "@modelcontextprotocol/sdk": "^1.0.4",
         "linkedom": "^0.18.0",
-        "open": "^10.1.0",
+        "open": "^11.0.0",
         "zod": "^3.24.0"
     },
     "devDependencies": {
-        "@types/node": "^20",
+        "@types/node": "^24.0.0",
         "tsx": "^4.19.0",
         "typescript": "^5"
     },

packages/mcp-server/src/diagram-operations.ts

@@ -182,32 +182,77 @@ export function applyDiagramOperations(
             // Add to map
             cellMap.set(op.cell_id, importedNode)
         } else if (op.operation === "delete") {
-            const existingCell = cellMap.get(op.cell_id)
-            if (!existingCell) {
+            // Protect root cells from deletion
+            if (op.cell_id === "0" || op.cell_id === "1") {
                 errors.push({
                     type: "delete",
                     cellId: op.cell_id,
-                    message: `Cell with id="${op.cell_id}" not found`,
+                    message: `Cannot delete root cell "${op.cell_id}"`,
                 })
                 continue
             }
 
-            // Check for edges referencing this cell (warning only, still delete)
-            const referencingEdges = root.querySelectorAll(
-                `mxCell[source="${op.cell_id}"], mxCell[target="${op.cell_id}"]`,
-            )
-            if (referencingEdges.length > 0) {
-                const edgeIds = Array.from(referencingEdges)
-                    .map((e) => e.getAttribute("id"))
-                    .join(", ")
-                console.warn(
-                    `[applyDiagramOperations] Deleting cell "${op.cell_id}" which is referenced by edges: ${edgeIds}`,
+            const existingCell = cellMap.get(op.cell_id)
+            if (!existingCell) {
+                // Cell not found - might have been cascade-deleted by a previous operation
+                // Skip silently instead of erroring (AI may redundantly list children/edges)
+                continue
+            }
+
+            // Cascade delete: collect all cells to delete (children + edges + self)
+            const cellsToDelete = new Set<string>()
+
+            // Recursive function to find all descendants
+            const collectDescendants = (cellId: string) => {
+                if (cellsToDelete.has(cellId)) return
+                cellsToDelete.add(cellId)
+
+                // Find children (cells where parent === cellId)
+                const children = root.querySelectorAll(
+                    `mxCell[parent="${cellId}"]`,
+                )
+                children.forEach((child) => {
+                    const childId = child.getAttribute("id")
+                    if (childId && childId !== "0" && childId !== "1") {
+                        collectDescendants(childId)
+                    }
+                })
+            }
+
+            // Collect the target cell and all its descendants
+            collectDescendants(op.cell_id)
+
+            // Find edges referencing any of the cells to be deleted
+            // Also recursively collect children of those edges (e.g., edge labels)
+            for (const cellId of cellsToDelete) {
+                const referencingEdges = root.querySelectorAll(
+                    `mxCell[source="${cellId}"], mxCell[target="${cellId}"]`,
+                )
+                referencingEdges.forEach((edge) => {
+                    const edgeId = edge.getAttribute("id")
+                    // Protect root cells from being added via edge references
+                    if (edgeId && edgeId !== "0" && edgeId !== "1") {
+                        // Recurse to collect edge's children (like labels)
+                        collectDescendants(edgeId)
+                    }
+                })
+            }
+
+            // Log what will be deleted
+            if (cellsToDelete.size > 1) {
+                console.log(
+                    `[applyDiagramOperations] Cascade delete "${op.cell_id}" → deleting ${cellsToDelete.size} cells: ${Array.from(cellsToDelete).join(", ")}`,
                 )
             }
 
-            // Remove the node
-            existingCell.parentNode?.removeChild(existingCell)
-            cellMap.delete(op.cell_id)
+            // Delete all collected cells
+            for (const cellId of cellsToDelete) {
+                const cell = cellMap.get(cellId)
+                if (cell) {
+                    cell.parentNode?.removeChild(cell)
+                    cellMap.delete(cellId)
+                }
+            }
         }
     }
 

packages/mcp-server/src/index.ts

@@ -78,7 +78,7 @@ server.prompt(
 
 ## Creating a New Diagram
 1. Call start_session to open the browser preview
-2. Use display_diagram with complete mxGraphModel XML to create a new diagram
+2. Use create_new_diagram with complete mxGraphModel XML to create a new diagram
 
 ## Adding Elements to Existing Diagram
 1. Use edit_diagram with "add" operation
@@ -91,7 +91,7 @@ server.prompt(
 3. For update, provide the cell_id and complete new mxCell XML
 
 ## Important Notes
-- display_diagram REPLACES the entire diagram - only use for new diagrams
+- create_new_diagram REPLACES the entire diagram - only use for new diagrams
 - edit_diagram PRESERVES user's manual changes (fetches browser state first)
 - Always use unique cell_ids when adding elements (e.g., "shape-1", "arrow-2")`,
                 },
@@ -150,19 +150,59 @@ server.registerTool(
     },
 )
 
-// Tool: display_diagram
+// Tool: create_new_diagram
 server.registerTool(
-    "display_diagram",
+    "create_new_diagram",
     {
-        description:
-            "Display a NEW draw.io diagram from XML. REPLACES the entire diagram. " +
-            "Use this for creating new diagrams from scratch. " +
-            "To ADD elements to an existing diagram, use edit_diagram with 'add' operation instead. " +
-            "You should generate valid draw.io/mxGraph XML format.",
+        description: `Create a NEW diagram from mxGraphModel XML. Use this when creating a diagram from scratch or replacing the current diagram entirely.
+
+CRITICAL: You MUST provide the 'xml' argument in EVERY call. Do NOT call this tool without xml.
+
+When to use this tool:
+- Creating a new diagram from scratch
+- Replacing the current diagram with a completely different one
+- Major structural changes that require regenerating the diagram
+
+When to use edit_diagram instead:
+- Small modifications to existing diagram
+- Adding/removing individual elements
+- Changing labels, colors, or positions
+
+XML FORMAT - Full mxGraphModel structure:
+<mxGraphModel>
+  <root>
+    <mxCell id="0"/>
+    <mxCell id="1" parent="0"/>
+    <mxCell id="2" value="Shape" style="rounded=1;" vertex="1" parent="1">
+      <mxGeometry x="100" y="100" width="120" height="60" as="geometry"/>
+    </mxCell>
+  </root>
+</mxGraphModel>
+
+LAYOUT CONSTRAINTS:
+- Keep all elements within x=0-800, y=0-600 (single page viewport)
+- Start from margins (x=40, y=40), keep elements grouped closely
+- Use unique IDs starting from "2" (0 and 1 are reserved)
+- Set parent="1" for top-level shapes
+- Space shapes 150-200px apart for clear edge routing
+
+EDGE ROUTING RULES:
+- Never let multiple edges share the same path - use different exitY/entryY values
+- For bidirectional connections (A↔B), use OPPOSITE sides
+- Always specify exitX, exitY, entryX, entryY explicitly in edge style
+- Route edges AROUND obstacles using waypoints (add 20-30px clearance)
+- Use natural connection points based on flow (not corners)
+
+COMMON STYLES:
+- Shapes: rounded=1; fillColor=#hex; strokeColor=#hex
+- Edges: endArrow=classic; edgeStyle=orthogonalEdgeStyle; curved=1
+- Text: fontSize=14; fontStyle=1 (bold); align=center`,
         inputSchema: {
             xml: z
                 .string()
-                .describe("The draw.io XML to display (mxGraphModel format)"),
+                .describe(
+                    "REQUIRED: The complete mxGraphModel XML. Must always be provided.",
+                ),
         },
     },
     async ({ xml: inputXml }) => {
@@ -199,7 +239,7 @@ server.registerTool(
                 }
             }
 
-            log.info(`Displaying diagram, ${xml.length} chars`)
+            log.info(`Setting diagram content, ${xml.length} chars`)
 
             // Sync from browser state first
             const browserState = getState(currentSession.id)
@@ -226,20 +266,20 @@ server.registerTool(
             // Save AI result (no SVG yet - will be captured by browser)
             addHistory(currentSession.id, xml, "")
 
-            log.info(`Diagram displayed successfully`)
+            log.info(`Diagram content set successfully`)
 
             return {
                 content: [
                     {
                         type: "text",
-                        text: `Diagram displayed successfully!\n\nThe diagram is now visible in your browser.\n\nXML length: ${xml.length} characters`,
+                        text: `Diagram content set successfully!\n\nThe diagram is now visible in your browser.\n\nXML length: ${xml.length} characters`,
                     },
                 ],
             }
         } catch (error) {
             const message =
                 error instanceof Error ? error.message : String(error)
-            log.error("display_diagram failed:", message)
+            log.error("create_new_diagram failed:", message)
             return {
                 content: [{ type: "text", text: `Error: ${message}` }],
                 isError: true,
@@ -340,7 +380,7 @@ server.registerTool(
                     content: [
                         {
                             type: "text",
-                            text: "Error: No diagram to edit. Please create a diagram first with display_diagram.",
+                            text: "Error: No diagram to edit. Please create a diagram first with create_new_diagram.",
                         },
                     ],
                     isError: true,
@@ -474,7 +514,7 @@ server.registerTool(
                     content: [
                         {
                             type: "text",
-                            text: "No diagram exists yet. Use display_diagram to create one.",
+                            text: "No diagram exists yet. Use create_new_diagram to create one.",
                         },
                     ],
                 }

public/doubao-color.svg

@@ -0,0 +1 @@
+<svg height="1em" style="flex:none;line-height:1" viewBox="0 0 24 24" width="1em" xmlns="http://www.w3.org/2000/svg"><title>Doubao</title><path d="M5.31 15.756c.172-3.75 1.883-5.999 2.549-6.739-3.26 2.058-5.425 5.658-6.358 8.308v1.12C1.501 21.513 4.226 24 7.59 24a6.59 6.59 0 002.2-.375c.353-.12.7-.248 1.039-.378.913-.899 1.65-1.91 2.243-2.992-4.877 2.431-7.974.072-7.763-4.5l.002.001z" fill="#1E37FC"></path><path d="M22.57 10.283c-1.212-.901-4.109-2.404-7.397-2.8.295 3.792.093 8.766-2.1 12.773a12.782 12.782 0 01-2.244 2.992c3.764-1.448 6.746-3.457 8.596-5.219 2.82-2.683 3.353-5.178 3.361-6.66a2.737 2.737 0 00-.216-1.084v-.002z" fill="#37E1BE"></path><path d="M14.303 1.867C12.955.7 11.248 0 9.39 0 7.532 0 5.883.677 4.545 1.807 2.791 3.29 1.627 5.557 1.5 8.125v9.201c.932-2.65 3.097-6.25 6.357-8.307.5-.318 1.025-.595 1.569-.829 1.883-.801 3.878-.932 5.746-.706-.222-2.83-.718-5.002-.87-5.617h.001z" fill="#A569FF"></path><path d="M17.305 4.961a199.47 199.47 0 01-1.08-1.094c-.202-.213-.398-.419-.586-.622l-1.333-1.378c.151.615.648 2.786.869 5.617 3.288.395 6.185 1.898 7.396 2.8-1.306-1.275-3.475-3.487-5.266-5.323z" fill="#1E37FC"></path></svg>

tsconfig.json

@@ -22,6 +22,7 @@
             "@/*": ["./*"]
         }
     },
+    "files": ["electron/electron.d.ts"],
     "include": [
         "next-env.d.ts",
         "**/*.ts",