移除轮询

backend/src/components/CommonHeader.vue

@@ -242,14 +242,7 @@ const handleMarkAllRead = async () => {
   }
 };
 
-const handleMessagesChanged = () => {
-  fetchUnreadCount();
-  fetchMessages();
-};
-
-let timer: any = null;
-
-// 根据菜单列表和当前路径计算出的面包屑导航
+ // 根据菜单列表和当前路径计算出的面包屑导航
 const breadcrumbs = computed(() => {
   let chain: Breadcrumb[] = [];
   let currentPath = route.path || '/';
@@ -433,9 +426,8 @@ onMounted(async () => {
   mediaQuery.addEventListener('change', handleChange);
 
   if (authStore.token) {
+    // 仅在后台页面刷新/首次挂载时更新未读数量，不再自动轮询。
     fetchUnreadCount();
-    timer = setInterval(fetchUnreadCount, 60000);
-    window.addEventListener('site-messages-changed', handleMessagesChanged);
   }
 });
 
@@ -444,10 +436,6 @@ onUnmounted(() => {
   if (mediaQuery && handleChange) {
     mediaQuery.removeEventListener('change', handleChange);
   }
-  if (timer) {
-    clearInterval(timer);
-  }
-  window.removeEventListener('site-messages-changed', handleMessagesChanged);
 });
 </script>