feat: 添加 Tauri 桌面应用

- 创建 packages/desktop 模块
- 实现 Tauri 2.0 + React 桌面应用
- 复用 Web 前端代码
- 添加系统托盘功能
- 实现本地文件访问命令
- 配置 Vite + Tauri 集成
- 更新 .gitignore 添加 Rust/Tauri 相关规则

packages/desktop/package.json

@@ -0,0 +1,38 @@
+{
+  "name": "@ai-assistant/desktop",
+  "version": "1.0.0",
+  "description": "AI Assistant Desktop Application",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "tauri dev",
+    "dev:vite": "vite",
+    "build": "tauri build",
+    "build:vite": "tsc && vite build",
+    "build:debug": "tauri build --debug",
+    "tauri": "tauri"
+  },
+  "dependencies": {
+    "@tauri-apps/api": "^2.1.1",
+    "@tauri-apps/plugin-dialog": "^2.2.0",
+    "@tauri-apps/plugin-fs": "^2.2.0",
+    "@tauri-apps/plugin-shell": "^2.2.0",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
+    "react-router-dom": "^6.22.0",
+    "zustand": "^4.5.0",
+    "lucide-react": "^0.344.0",
+    "clsx": "^2.1.0"
+  },
+  "devDependencies": {
+    "@tauri-apps/cli": "^2.1.0",
+    "@types/react": "^18.3.0",
+    "@types/react-dom": "^18.3.0",
+    "@vitejs/plugin-react": "^4.2.1",
+    "autoprefixer": "^10.4.18",
+    "postcss": "^8.4.35",
+    "tailwindcss": "^3.4.1",
+    "typescript": "^5.3.3",
+    "vite": "^5.1.0"
+  }
+}