refactor: archive python backend to examples/ and optimize docs

- Move server/ to examples/backend-python/ (optional reference impl)
- Remove duplicate changelog/CHANGELOG.zh-CN.md
- Update docs: Node.js ≥22, version v2.1.0
- Enhance build-pages.sh with sitemap generation
- Clean .gitignore: add *.tsbuildinfo, update comments
- Add .vscode/ configs (mcp.json, settings.json)

Author: LessUp

.gitignore

@@ -6,6 +6,7 @@ dist/
 dist-ssr/
 build/
 coverage/
+*.tsbuildinfo
 
 # Environment variables
 .env
@@ -15,6 +16,8 @@ coverage/
 # Editor directories and files
 .vscode/*
 !.vscode/extensions.json
+!.vscode/settings.json
+!.vscode/mcp.json
 .idea/
 *.suo
 *.ntvs*
@@ -29,7 +32,7 @@ Thumbs.db
 # Logs
 *.log
 
-# Python (server/)
+# Python (examples/backend-python/)
 __pycache__/
 *.py[cod]
 .venv/

.vscode/mcp.json

@@ -0,0 +1,8 @@
+{
+  "servers": {
+    "copilot-enhance-3210": {
+      "type": "http",
+      "url": "http://127.0.0.1:3210/mcp"
+    }
+  }
+}

.vscode/settings.json

@@ -0,0 +1,22 @@
+{
+  "editor.formatOnSave": true,
+  "editor.defaultFormatter": "esbenp.prettier-vscode",
+  "editor.codeActionsOnSave": {
+    "source.fixAll.eslint": "explicit"
+  },
+  "typescript.tsdk": "node_modules/typescript/lib",
+  "typescript.enablePromptUseWorkspaceTsdk": true,
+  "typescript.preferences.importModuleSpecifier": "non-relative",
+  "typescript.preferences.importModuleSpecifierEnding": "js",
+  "files.associations": {
+    "*.css": "tailwindcss"
+  },
+  "tailwindCSS.experimental.classRegex": [
+    ["clsx\\(([^)]*)\\)", "(?:'|\"|`)([^']*)(?:'|\"|`)"]
+  ],
+  "search.exclude": {
+    "**/node_modules": true,
+    "**/dist": true,
+    "**/coverage": true
+  }
+}

README.md

@@ -82,6 +82,8 @@ Open **http://localhost:5173** — your 3D avatar is ready!
 
 > 💡 **No API key required.** The engine automatically falls back to local mock mode for out-of-the-box demos.
 
+> 🐍 **Optional Backend:** A FastAPI backend example is available in `examples/backend-python/` for custom integrations.
+
 ---
 
 ## 🎯 Features

README.zh-CN.md

@@ -82,6 +82,8 @@ npm run dev
 
 > 💡 **无需 API Key。** 引擎自动降级到本地模拟模式，开箱即用。
 
+> 🐍 **可选后端：** 如需自定义集成，可参考 `examples/backend-python/` 中的 FastAPI 示例。
+
 ---
 
 ## 🎯 Features

changelog/CHANGELOG.zh-CN.md

@@ -8,11 +8,12 @@ Get MetaHuman Engine running in 5 minutes.
 
 | Requirement | Version | Check Command      |
 | ----------- | ------- | ------------------ |
-| Node.js     | ≥ 20    | `node --version`   |
-| npm         | ≥ 9     | `npm --version`    |
-| Python      | ≥ 3.10  | `python --version` |
+| Node.js     | ≥ 22    | `node --version`   |
+| npm         | ≥ 10    | `npm --version`    |
 | Git         | Any     | `git --version`    |
 
+> 🐍 **Optional Backend:** A FastAPI backend example is available in `examples/backend-python/` for custom integrations. See backend setup instructions below.
+
 ---
 
 ## Installation
@@ -55,7 +56,8 @@ meta-human/
 │   │   └── vision/        # Face tracking
 │   ├── store/             # Zustand stores
 │   └── hooks/             # Custom hooks
-├── server/                 # FastAPI backend
+├── examples/              # Optional backend examples
+│   └── backend-python/    # FastAPI reference implementation
 ├── docs/                   # Documentation
 ├── public/                 # Static assets
 └── dist/                   # Build output
@@ -155,10 +157,12 @@ npm run build
 npm run test
 ```
 
-### Backend Development
+### Backend Development (Optional)
+
+If you want to use a custom backend instead of the mock mode:
 
 ```bash
-cd server
+cd examples/backend-python
 
 # Create virtual environment (recommended)
 python -m venv venv

docs/guide/README.md

@@ -106,7 +106,7 @@ MetaHuman Engine is a **browser-native 3D digital human engine** that provides a
 
 ## 📋 Version Information
 
-**Current Version:** `v1.0.0`
+**Current Version:** `v2.1.0`
 
 See [CHANGELOG](../CHANGELOG.md) for version history.