修bug

src/layouts/MainLayout.vue

@@ -363,6 +363,14 @@ export default {
      * @returns {Promise<void>}
      */
     const fetchUnresolvedAlarmCount = async () => {
+      // 检查用户是否已登录
+      const token = localStorage.getItem('jwt_token');
+      if (!token) {
+        // 如果未登录，则不执行告警接口调用
+        unresolvedAlarmCount.value = 0;
+        return;
+      }
+
       try {
         // 调用API获取活跃且未忽略的告警数量
         const response = await getActiveAlarms({
@@ -391,8 +399,8 @@ export default {
       window.addEventListener('storage', handleStorageChange);
       // 首次加载时获取告警数量
       fetchUnresolvedAlarmCount();
-      // 每30秒刷新一次告警数量
-      alarmFetchInterval = setInterval(fetchUnresolvedAlarmCount, 30000);
+      // 每60秒刷新一次告警数量
+      alarmFetchInterval = setInterval(fetchUnresolvedAlarmCount, 60000);
     });
 
     onUnmounted(() => {