修改公告bug

src/views/MainPage.vue

@@ -271,6 +271,23 @@ export default {
       }
     };
 
+    // 标记所有未读公告为已读的标志
+    const isMarkingAsRead = ref(false);
+
+    // 标记所有未读公告为已读
+    const markAllAnnouncementsAsRead = async () => {
+      if (isMarkingAsRead.value) return; // 防止重复调用
+      isMarkingAsRead.value = true;
+      
+      try {
+        for (const announcement of unreadAnnouncements.value) {
+          await markAnnouncementAsRead(announcement.id);
+        }
+      } finally {
+        isMarkingAsRead.value = false;
+      }
+    };
+
     // 关闭欢迎弹窗并标记所有未读公告为已读
     const closeWelcomeDialog = async () => {
       await markAllAnnouncementsAsRead();