fix(projects): 未读消息数字对不上的问题修复

src/layouts/modules/global-header/components/notification-bell.vue

@@ -296,12 +296,17 @@ async function onNotifyLinkClick(row: Api.NotifyMessage.NotifyMessage) {
 
 async function markAllRead() {
   const { error } = await fetchUpdateAllNotifyMessageRead();
-  if (error) return;
+  if (error) {
+    window.$message?.error('全部标记已读失败，请重试');
+    return;
+  }
 
   unreadCount.value = 0;
   resetList('unread');
   resetList('read');
   loadPage(activeTab.value);
+  // 以后端真实未读数兜底校准，避免乐观置 0 与后端状态偏差（不必等 15s 轮询）
+  refreshUnreadCount();
 }
 
 let pollTimer: ReturnType<typeof setInterval> | null = null;
@@ -360,7 +365,7 @@ onBeforeUnmount(() => {
           <template #label>
             <span class="notification-bell__tab-label">
               未读
-              <span class="notification-bell__tab-count">{{ listStates.unread.total }}</span>
+              <span class="notification-bell__tab-count">{{ badgeLabel }}</span>
             </span>
           </template>
           <ElScrollbar ref="unreadScrollbar" class="notification-bell__scroll">