feat: add Prometheus system monitoring

src/layouts/AdminLayout.tsx

@@ -25,6 +25,7 @@ import {
   ReceiptText,
   ClipboardList,
   Send,
+  ServerCog,
   ScanSearch,
   Settings,
   Shield,
@@ -202,6 +203,7 @@ function AdminAuthenticatedLayout({ session }: { session: LoginSession }) {
             { label: '报备字段库', to: '/admin/drainage-fields', icon: Hash },
             { label: '引流识别规则', to: '/admin/drainage-detection-rules', icon: ScanSearch },
             { label: '系统日志', to: '/admin/system-logs', icon: FileText },
+            { label: '系统监控', to: '/admin/system-monitoring', icon: ServerCog },
           ],
         },
       ]}