fix: 线下签署登记标题英文转中文+完成时间时区+签署记录角标

1. documentTitle 中 contractType 枚举值转中文
   （LABOR→劳务协议、FIXED→固定期限劳动合同等）
2. 签署日期解析改为本地时区构造（new Date(y,m-1,d,12)），
   避免 new Date('2026-08-16') 被解析为 UTC 00:00 导致
   本地 +8 显示为 08:00:00
3. 签署记录 Tab 增加数字角标显示总记录数

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frontend/src/App.tsx

@@ -61,6 +61,7 @@ const SalaryDashboard = lazy(() => import('./pages/SalaryDashboard'))
 const CommercialInsurance = lazy(() => import('./pages/CommercialInsurance'))
 const EmployeeBenefits = lazy(() => import('./pages/EmployeeBenefits'))
 const ESign = lazy(() => import('./pages/ESign'))
+const CommissionBonus = lazy(() => import('./pages/CommissionBonus'))
 
 // 平台管理端
 const PlatformLogin = lazy(() => import('./pages/platform/PlatformLogin'))
@@ -204,6 +205,7 @@ export default function App() {
       <Route path="/tools/health-check" element={<ProtectedRoute><AdminLayout><HealthCheck /></AdminLayout></ProtectedRoute>} />
       <Route path="/tools/annual-value" element={<ProtectedRoute><AdminLayout><AnnualValueReport /></AdminLayout></ProtectedRoute>} />
       <Route path="/special-status" element={<ProtectedRoute><AdminLayout><SpecialStatus /></AdminLayout></ProtectedRoute>} />
+      <Route path="/commission-bonus" element={<ProtectedRoute><AdminLayout><CommissionBonus /></AdminLayout></ProtectedRoute>} />
       <Route path="/company-files" element={<ProtectedRoute><AdminLayout><CompanyFiles /></AdminLayout></ProtectedRoute>} />
       <Route path="/leave-approval" element={<ProtectedRoute><AdminLayout><LeaveApproval /></AdminLayout></ProtectedRoute>} />
       <Route path="/training-records" element={<ProtectedRoute><AdminLayout><TrainingRecords /></AdminLayout></ProtectedRoute>} />