feat: 初始化 Vite React 聊天应用骨架

搭建 React + Vite + React Router + TailwindCSS + Ant Design 基础工程，并通过 vite-plugin-pages 实现文件路由。新增首页响应式聊天布局，移动端在小于 750px 时使用左侧抽屉侧边栏。

Made-with: Cursor

tsconfig.app.json

@@ -0,0 +1,18 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "useDefineForClassFields": true,
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "skipLibCheck": true,
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+    "jsx": "react-jsx",
+    "strict": true
+  },
+  "include": ["src"]
+}