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/server/db/projects.test.ts

@@ -300,4 +300,63 @@ describe("项目数据访问层", () => {
       rmSync(dir, { force: true, recursive: true });
     }
   });
+
+  test("创建项目名称超过 10 个字符失败", () => {
+    const dir = makeTempDir();
+    try {
+      const db = setupDb(dir);
+      const result = createProject(db, { name: "这是一个很长的名字" });
+      expect("error" in result).toBe(true);
+      expect((result as unknown as { error: string }).error).toContain("不能超过 10 个字符");
+      db.close();
+    } finally {
+      rmSync(dir, { force: true, recursive: true });
+    }
+  });
+
+  test("创建项目名称刚好 10 个字符成功", () => {
+    const dir = makeTempDir();
+    try {
+      const db = setupDb(dir);
+      const result = createProject(db, { name: "一二三四五六七八九十" });
+      expect("error" in result).toBe(false);
+      const project = (result as { project: { name: string } }).project;
+      expect(project.name).toBe("一二三四五六七八九十");
+      db.close();
+    } finally {
+      rmSync(dir, { force: true, recursive: true });
+    }
+  });
+
+  test("更新项目名称超过 10 个字符失败", () => {
+    const dir = makeTempDir();
+    try {
+      const db = setupDb(dir);
+      const created = createProject(db, { name: "短名" });
+      const id = (created as { project: { id: string } }).project.id;
+
+      const result = updateProject(db, id, { name: "这是一个很长的名字" });
+      expect("error" in result).toBe(true);
+      expect((result as unknown as { error: string }).error).toContain("不能超过 10 个字符");
+      db.close();
+    } finally {
+      rmSync(dir, { force: true, recursive: true });
+    }
+  });
+
+  test("更新项目名称 trim 后为空失败", () => {
+    const dir = makeTempDir();
+    try {
+      const db = setupDb(dir);
+      const created = createProject(db, { name: "原名" });
+      const id = (created as { project: { id: string } }).project.id;
+
+      const result = updateProject(db, id, { name: "   " });
+      expect("error" in result).toBe(true);
+      expect((result as unknown as { error: string }).error).toContain("不能为空");
+      db.close();
+    } finally {
+      rmSync(dir, { force: true, recursive: true });
+    }
+  });
 });