修复Navbar菜单点击事件：增强事件参数处理，添加调试日志

frontend/src/components/Navbar.vue

@@ -161,7 +161,9 @@ const handleAchievements = () => {
 }
 
 // 处理菜单点击
-const handleMenuClick = ({ key }: { key: string }) => {
+const handleMenuClick = (info: any) => {
+  const key = info?.key || info
+  console.log('菜单点击事件:', key, info)
   if (key === 'profile') {
     router.push('/profile')
   } else if (key === 'settings') {