feat(frontend): add frontend-v2 modular architecture (Task 17)

- React 19 + TypeScript + Vite
- Module registration mechanism with dynamic loading
- Permission management system (basic/advanced/premium)
- Route guards for access control
- Error boundaries for module isolation
- 6 business module placeholders (AIA/ASL/PKB/DC/SSA/ST)
- Top navigation layout
- Tailwind CSS 3 + Ant Design 5

frontend-v2/src/framework/layout/MainLayout.tsx

@@ -0,0 +1,44 @@
+import { Suspense } from 'react'
+import { Outlet } from 'react-router-dom'
+import { Spin } from 'antd'
+import TopNavigation from './TopNavigation'
+import ErrorBoundary from '../modules/ErrorBoundary'
+
+/**
+ * 主布局组件
+ * 
+ * @description
+ * - 顶部导航栏
+ * - 错误边界保护 ⭐ Week 2 Day 7 新增
+ * - 懒加载支持（Suspense）
+ * - 主内容区（Outlet）
+ * 
+ * @version Week 2 Day 7 - 任务17：集成错误边界
+ */
+const MainLayout = () => {
+  return (
+    <div className="min-h-screen flex flex-col bg-gray-50">
+      {/* 顶部导航 */}
+      <TopNavigation />
+
+      {/* 主内容区 - 添加错误边界保护 ⭐ */}
+      <div className="flex-1 flex flex-col">
+        <ErrorBoundary moduleName="主应用">
+          <Suspense 
+            fallback={
+              <div className="flex-1 flex items-center justify-center">
+                <Spin size="large" tip="加载中..." />
+              </div>
+            }
+          >
+            <Outlet />
+          </Suspense>
+        </ErrorBoundary>
+      </div>
+    </div>
+  )
+}
+
+export default MainLayout
+
+