feat(admin): batch ops, transfer, watermark, usage and qr share pages

Co-Authored-By: Claude Code <noreply@anthropic.com>

apps/admin/src/router/modules/system.ts

@@ -1,5 +1,5 @@
 /**
- * 账号治理路由（P4a Task 8：账号管理 + 用户同步）
+ * 账号治理路由（P4a Task 8：账号管理 + 用户同步；Task 9：用量统计）
  */
 import { AppRouteRecord } from '@/types/router'
 
@@ -31,6 +31,16 @@ export const systemRoutes: AppRouteRecord = {
         icon: 'ri:refresh-line',
         keepAlive: false
       }
+    },
+    {
+      path: 'usage',
+      name: 'SystemUsage',
+      component: '/system/usage',
+      meta: {
+        title: 'menus.system.usage',
+        icon: 'ri:pie-chart-line',
+        keepAlive: false
+      }
     }
   ]
 }