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/modules/ssa/index.tsx

@@ -0,0 +1,22 @@
+import React from 'react'
+import Placeholder from '../../shared/components/Placeholder'
+
+/**
+ * 智能统计分析模块
+ * Java团队开发，前端仅做导航集成
+ */
+const SSAModule: React.FC = () => {
+  return (
+    <Placeholder 
+      moduleName="智能统计分析" 
+      message="由Java团队开发中，前端集成规划中" 
+    />
+  )
+}
+
+export default SSAModule
+
+
+
+
+