fix(front): 修复前台退出登录确认弹窗样式丢失

更新说明：\n1. 在用户端 AppLayout 显式引入 Element Plus 的 Message/MessageBox 样式。\n2. 修复退出登录确认弹窗偶发样式异常（看起来像 JS 未加载）的显示问题。\n3. 同步更新前台构建产物与 manifest。

static/app/.vite/manifest.json

@@ -193,7 +193,7 @@
     "name": "vendor-vue"
   },
   "index.html": {
-    "file": "assets/app-CZnjzsIN.js",
+    "file": "assets/app-CfFNNMbF.js",
     "name": "app",
     "src": "index.html",
     "isEntry": true,
@@ -224,7 +224,7 @@
     ]
   },
   "src/layouts/AppLayout.vue": {
-    "file": "assets/AppLayout-Dx0be4wS.js",
+    "file": "assets/AppLayout-BVxPO9-W.js",
     "name": "AppLayout",
     "src": "src/layouts/AppLayout.vue",
     "isDynamicEntry": true,
@@ -242,7 +242,7 @@
       "_vendor-axios-B9ygI19o.js"
     ],
     "css": [
-      "assets/AppLayout-D94213-a.css"
+      "assets/AppLayout-eF3aodBF.css"
     ]
   },
   "src/pages/AccountsPage.vue": {