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

tests/web/routes/projects.test.tsx

@@ -1,4 +1,4 @@
-import { screen, waitFor } from "@testing-library/react";
+import { fireEvent, screen, waitFor } from "@testing-library/react";
 import { describe, expect, test } from "bun:test";
 import { createElement } from "react";
 
@@ -9,13 +9,11 @@ describe("ProjectsPage", () => {
   test("渲染 Tab、搜索框、新建按钮和表格", async () => {
     renderWithProviders(createElement(ProjectsPage));
 
-    // Tabs, search, create button always visible
     expect(screen.getByText("进行中")).not.toBeNull();
     expect(screen.getByText("已归档")).not.toBeNull();
     expect(screen.getByText("搜索")).not.toBeNull();
     expect(screen.getByText("新建项目")).not.toBeNull();
 
-    // Table renders (shows loading or empty state)
     await waitFor(
       () => {
         const body = document.body.textContent ?? "";
@@ -28,14 +26,14 @@ describe("ProjectsPage", () => {
   test("新建按钮点击打开弹窗", async () => {
     renderWithProviders(createElement(ProjectsPage));
 
-    const createBtn = screen.getByText("新建项目");
-    createBtn.click();
+    const createBtn = screen.getByRole("button", { name: /新建项目/ });
+    fireEvent.click(createBtn);
 
     await waitFor(
       () => {
-        expect(screen.getByText("确定")).not.toBeNull();
+        expect(document.body.querySelector(".ant-modal")).not.toBeNull();
       },
-      { timeout: 5000 },
+      { timeout: 10000 },
     );
   });
 });