feat(web): update composables

- useAppShell.js: update app shell composable
- useNavigation.js: update navigation composable
- useRequests.js: update requests composable

web/src/composables/useNavigation.js

@@ -24,11 +24,11 @@ export const navItems = [
   },
   {
     id: 'requests',
-    label: '申请单',
-    navHint: '查看和管理申请单',
+    label: '个人报销',
+    navHint: '查看和管理个人报销',
     icon: icons.list,
-    title: '差旅申请与单据',
-    desc: '集中查看申请单状态、处理进度和风险提示。'
+    title: '个人报销',
+    desc: '集中查看草稿、审批进度、票据状态与风险提示。'
   },
   {
     id: 'approval',