优化: 大文件拆分+代码分割+按需加载+console清理+any类型替换

- Money.tsx (2260行→54行): 拆分为 money/ 子目录4个组件, React.lazy二级分割
- AIAssistant.tsx (2038行→63行): 拆分为 ai-assistant/ 子目录6个组件, React.lazy二级分割
- xlsx改为动态导入, OvertimeTab从345KB降至12.7KB
- api-services.ts: 请求参数 any→Record<string,unknown>
- 移除前端3处console.log残留
- 后端console替换为pino logger
- 前后端未使用import/变量清理
- Zod schema验证: termination/platform/special-status/work-process
- 新增 leave.routes.ts, acceptance-test.routes.ts
- UI组件: PageGuide, QueryError, Stepper

frontend/src/App.tsx

@@ -40,8 +40,10 @@ const AnnualValueReport = lazy(() => import('./pages/tools/AnnualValueReport'))
 const CalendarPage = lazy(() => import('./pages/Calendar'))
 const WorkProcess = lazy(() => import('./pages/WorkProcess'))
 const MyAttendance = lazy(() => import('./pages/portal/MyAttendance'))
+const MyLeave = lazy(() => import('./pages/portal/MyLeave'))
 const SpecialStatus = lazy(() => import('./pages/SpecialStatus'))
 const CompanyFiles = lazy(() => import('./pages/CompanyFiles'))
+const LeaveApproval = lazy(() => import('./pages/LeaveApproval'))
 
 // Sprint 4-5 新增页面
 const EmployeeHome = lazy(() => import('./pages/portal/EmployeeHome'))
@@ -191,6 +193,7 @@ export default function App() {
       <Route path="/work-process" element={<ProtectedRoute><AdminLayout><WorkProcess /></AdminLayout></ProtectedRoute>} />
       <Route path="/special-status" element={<ProtectedRoute><AdminLayout><SpecialStatus /></AdminLayout></ProtectedRoute>} />
       <Route path="/company-files" element={<ProtectedRoute><AdminLayout><CompanyFiles /></AdminLayout></ProtectedRoute>} />
+      <Route path="/leave-approval" element={<ProtectedRoute><AdminLayout><LeaveApproval /></AdminLayout></ProtectedRoute>} />
       <Route path="/risk-center" element={<ProtectedRoute><AdminLayout><RiskCenter /></AdminLayout></ProtectedRoute>} />
       <Route path="/salary-dashboard" element={<ProtectedRoute><AdminLayout><SalaryDashboard /></AdminLayout></ProtectedRoute>} />
 
@@ -208,6 +211,7 @@ export default function App() {
       <Route path="/portal/contract-confirm" element={<PortalLayoutWrapper showNav={false}><ContractConfirm /></PortalLayoutWrapper>} />
       <Route path="/portal/policies" element={<PortalLayoutWrapper><MyPolicies /></PortalLayoutWrapper>} />
       <Route path="/portal/attendance" element={<PortalLayoutWrapper><MyAttendance /></PortalLayoutWrapper>} />
+      <Route path="/portal/leave" element={<PortalLayoutWrapper><MyLeave /></PortalLayoutWrapper>} />
       <Route path="/portal/auto-login" element={<PortalLayoutWrapper showNav={false}><AutoLogin /></PortalLayoutWrapper>} />
       <Route path="/portal/home" element={<PortalLayoutWrapper><EmployeeHome /></PortalLayoutWrapper>} />
       <Route path="/portal/onboarding-progress" element={<PortalLayoutWrapper><OnboardingProgress /></PortalLayoutWrapper>} />