feat: 添加全员公告发布页面，包含发布表单和历史记录展示。

src/pages/Notifications/NotificationPublish.tsx

@@ -25,8 +25,8 @@ const NotificationPublish: React.FC = () => {
         setHistoryLoading(true);
         try {
             const res: any = await request.get('/notifications/announcements?limit=5');
-            if (res && res.announcements) {
-                setHistory(res.announcements);
+            if (res && res.success && res.data && res.data.announcements) {
+                setHistory(res.data.announcements);
             }
         } catch (error) {
             console.error('获取历史记录失败:', error);