diff --git a/src/frontend/src/store.ts b/src/frontend/src/store.ts
index 0479b6b..a29e798 100644
--- a/src/frontend/src/store.ts
+++ b/src/frontend/src/store.ts
@@ -678,11 +678,14 @@ export function timeAgo(iso: string | undefined): string {
 // ── SSE 实时事件监听 ──
 
 let _es: EventSource | null = null;
+let _sseRetryCount = 0;
+const SSE_MAX_RETRY = 5;
 
 export function startSSE() {
   if (_es) return;
   try {
     _es = new EventSource('/api/events');
+    _es.onopen = () => { _sseRetryCount = 0; };
     _es.addEventListener('task_updated', (e: MessageEvent) => {
       try {
         const data = JSON.parse(e.data);
@@ -724,10 +727,39 @@ export function startSSE() {
         }
       } catch { /* ignore */ }
     });
+    // 将事件推入 store 供 NotificationCenter 消费
+    _es.onmessage = (e: MessageEvent) => {
+      try {
+        const sseEvents = useStore.getState().sseEvents as NotifItem[];
+        const data = JSON.parse(e.data);
+        const etype = (e as any).type || data.event_type || '';
+        const importantTypes = ['task_completed', 'task_failed', 'review_result', 'task_updated'];
+        if (!importantTypes.includes(etype)) return;
+        const ntype = etype === 'task_failed' ? 'error' : etype === 'task_completed' ? 'success' : etype === 'review_result' ? 'warning' : 'info';
+        const item: NotifItem = {
+          id: data.id || `sse-${Date.now()}`,
+          type: ntype,
+          title: data.task_id ? `任务 ${data.task_id.slice(0, 8)}...` : etype,
+          message: `${data.old_status || ''} → ${data.new_status || etype}`,
+          time: data.timestamp || new Date().toISOString(),
+          read: false,
+          source: 'event',
+          taskId: data.task_id,
+          projectId: data.project_id,
+        };
+        useStore.setState({ sseEvents: [item, ...sseEvents].slice(0, 30) });
+      } catch { /* ignore */ }
+    };
     _es.onerror = () => {
       _es?.close();
       _es = null;
-      setTimeout(startSSE, 3000);
+      _sseRetryCount++;
+      if (_sseRetryCount > SSE_MAX_RETRY) {
+        console.warn(`SSE failed ${SSE_MAX_RETRY} times, stopping. Manual refresh required.`);
+        return;
+      }
+      const delay = Math.min(3000 * Math.pow(2, _sseRetryCount - 1), 30000);
+      setTimeout(startSSE, delay);
     };
   } catch { /* ignore */ }
 }
@@ -737,4 +769,5 @@ export function stopSSE() {
     _es.close();
     _es = null;
   }
+  _sseRetryCount = 0;
 }