fix(frontend): 修复前端审计问题并补充回归测试

frontend/src/router/index.ts

@@ -8,6 +8,7 @@ import { useAuthStore } from '@/stores/auth'
 import { useAppStore } from '@/stores/app'
 import { useNavigationLoadingState } from '@/composables/useNavigationLoading'
 import { useRoutePrefetch } from '@/composables/useRoutePrefetch'
+import { resolveDocumentTitle } from './title'
 
 /**
  * Route definitions with lazy loading
@@ -389,12 +390,7 @@ router.beforeEach((to, _from, next) => {
 
   // Set page title
   const appStore = useAppStore()
-  const siteName = appStore.siteName || 'Sub2API'
-  if (to.meta.title) {
-    document.title = `${to.meta.title} - ${siteName}`
-  } else {
-    document.title = siteName
-  }
+  document.title = resolveDocumentTitle(to.meta.title, appStore.siteName)
 
   // Check if route requires authentication
   const requiresAuth = to.meta.requiresAuth !== false // Default to true