refactor: 前端 UI 框架从 TDesign 迁移到 antd 6.x

- 移除 tdesign-react + tdesign-icons-react，新增 antd@6.4.3 + @ant-design/icons@6.2.3
- Layout/Header/Sider/Content 替换 TDesign Layout，Sider 内置折叠管理
- Segmented 替换 RadioGroup 主题切换，ConfigProvider 主题算法切换
- Menu items prop 模式，Sidebar 简化为无 props 纯组件
- Table/Modal/Form/Input.TextArea/Tabs/Tag/Popconfirm 全量迁移
- App.useApp().message 替换 MessagePlugin（hooks 模式）
- --td-* CSS 变量替换为 --ant-* antd CSS 变量
- 测试适配：ConfigProvider+App wrapper，.ant-menu-item-selected，antd CSS-in-JS jsdom 兼容
- 文档更新：frontend.md, development/README.md, config.yaml, deploy.md
- vendor-antd chunk 755KB gzipped 240KB

src/web/main.tsx

@@ -5,12 +5,6 @@ import { createRoot } from "react-dom/client";
 import { BrowserRouter } from "react-router";
 
 import { App } from "./app";
-import { ErrorBoundary } from "./components/ErrorBoundary";
-import { applyInitialSidebarCollapsed } from "./hooks/use-sidebar-collapsed";
-import { applyInitialThemePreference } from "./hooks/use-theme-preference";
-import "tdesign-react/dist/reset.css";
-import "tdesign-react/dist/tdesign.min.css";
-
 import "./styles.css";
 
 const queryClient = new QueryClient({
@@ -29,18 +23,13 @@ if (!rootElement) {
   throw new Error("找不到前端挂载节点 #root");
 }
 
-applyInitialThemePreference();
-applyInitialSidebarCollapsed();
-
 createRoot(rootElement).render(
   <StrictMode>
-    <ErrorBoundary>
-      <QueryClientProvider client={queryClient}>
-        <BrowserRouter>
-          <App />
-        </BrowserRouter>
-        <ReactQueryDevtools initialIsOpen={false} />
-      </QueryClientProvider>
-    </ErrorBoundary>
+    <QueryClientProvider client={queryClient}>
+      <BrowserRouter>
+        <App />
+      </BrowserRouter>
+      <ReactQueryDevtools initialIsOpen={false} />
+    </QueryClientProvider>
   </StrictMode>,
 );