feat: Admin/Workbench 双入口架构

- 抽取 ConsoleShell 共享外壳（Layout/Header/Sider/主题切换/侧边栏折叠）
- Sidebar 纯化为接受 menuItems prop 的展示组件
- Admin 管理台：/ 总览 + /projects 项目管理
- Workbench 工作台：/workbench/:projectId 项目作用域
- WorkbenchProjectGate 入口守卫（loading/error/archived/不存在拦截）
- ProjectContext 提供当前项目上下文
- 项目管理表格 active 行增加'进入工作台'按钮
- 项目名称 trim 后最多 10 字符（前后端一致）
- Workbench 总览页展示项目 Descriptions
- Header 区分：管理台显示副标题，工作台显示项目名 + 返回管理台按钮
- 28/28 前端测试通过
- 文档更新：frontend.md ConsoleShell 规范、usage.md 双入口说明

tests/web/App.test.tsx

@@ -1,4 +1,3 @@
-/* eslint-disable @typescript-eslint/require-await */
 import { screen } from "@testing-library/react";
 import { describe, expect, test } from "bun:test";
 import { createElement } from "react";
@@ -9,7 +8,7 @@ import { renderWithProviders } from "./test-utils";
 
 describe("App", () => {
   test("渲染 Layout 骨架和品牌名", () => {
-    window.fetch = (async () => {
+    window.fetch = (() => {
       return new Response(
         JSON.stringify({ ok: true, service: "test-app", timestamp: new Date().toISOString(), version: "0.1.0" }),
         {
@@ -27,8 +26,8 @@ describe("App", () => {
     expect(screen.getByText("黑暗")).not.toBeNull();
   });
 
-  test("渲染侧边栏菜单项", () => {
-    window.fetch = (async () => {
+  test("渲染 Admin 侧边栏菜单项", () => {
+    window.fetch = (() => {
       return new Response(
         JSON.stringify({ ok: true, service: "test-app", timestamp: new Date().toISOString(), version: "0.1.0" }),
         {
@@ -40,12 +39,12 @@ describe("App", () => {
 
     renderWithProviders(createElement(App));
 
-    expect(screen.getAllByText("仪表盘").length).toBeGreaterThan(0);
+    expect(screen.getAllByText("总览").length).toBeGreaterThan(0);
     expect(screen.getAllByText("项目管理").length).toBeGreaterThan(0);
   });
 
   test("Sider 渲染侧边栏菜单", () => {
-    window.fetch = (async () => {
+    window.fetch = (() => {
       return new Response(
         JSON.stringify({ ok: true, service: "test-app", timestamp: new Date().toISOString(), version: "0.1.0" }),
         {
@@ -62,4 +61,20 @@ describe("App", () => {
     const menu = document.querySelector(".ant-menu");
     expect(menu).not.toBeNull();
   });
+
+  test("Admin header 显示管理台标题", () => {
+    window.fetch = (() => {
+      return new Response(
+        JSON.stringify({ ok: true, service: "test-app", timestamp: new Date().toISOString(), version: "0.1.0" }),
+        {
+          headers: { "Content-Type": "application/json" },
+          status: 200,
+        },
+      );
+    }) as unknown as typeof fetch;
+
+    renderWithProviders(createElement(App));
+
+    expect(screen.getByText("管理台")).not.toBeNull();
+  });
 });