feat: 增强维护模式和审计页面功能，优化构建流程

admin/src/App.tsx

@@ -94,6 +94,10 @@ const WorkersPage = lazy(async () => {
   const mod = await import('@/pages/workers-page')
   return { default: mod.WorkersPage }
 })
+const AuditPage = lazy(async () => {
+  const mod = await import('@/pages/audit-page')
+  return { default: mod.AuditPage }
+})
 
 type SessionContextValue = {
   session: AdminSessionResponse
@@ -397,6 +401,14 @@ function AppRoutes() {
             </LazyRoute>
           }
         />
+        <Route
+          path="audit"
+          element={
+            <LazyRoute>
+              <AuditPage />
+            </LazyRoute>
+          }
+        />
         <Route
           path="reviews"
           element={

admin/src/components/app-shell.tsx

@@ -106,6 +106,12 @@ const primaryNav = [
     description: '异步任务 / 队列控制台',
     icon: Workflow,
   },
+  {
+    to: '/audit',
+    label: '审计',
+    description: '后台操作日志与排障线索',
+    icon: History,
+  },
   {
     to: '/settings',
     label: '设置',