refactor(sse)!: 'message' event → 'notice' event with strongly-typed JSON payload

- 'notice' event handler parses JSON {type, title, message} → noticeStore + ElNotification
- Backend 老 3 处调用全部改为发 NoticePayload 强类型(LOGIN_WELCOME/WORKFLOW_TASK/SYSTEM_NOTICE),前端按 type 字段二次分发预留

src/utils/sse.ts

@@ -3,6 +3,17 @@ import { ElNotification } from 'element-plus';
 import { useNoticeStore } from '@/store/modules/notice';
 import { getSseEventBus } from '@/utils/sseEventBus';
 
+/**
+ * Strongly-typed payload of the unified "notice" SSE event.
+ * Backend sends one of: LOGIN_WELCOME, WORKFLOW_TASK, SYSTEM_NOTICE
+ * (all share the same shape — type field for dispatching, title + message for display).
+ */
+interface NoticePayload {
+  type: string;
+  title: string;
+  message: string;
+}
+
 // Business-level SSE event names forwarded to the global event bus.
 // Feature modules subscribe via getSseEventBus().on('xxx', handler).
 const FORWARD_EVENTS = ['customerservice'];
@@ -24,17 +35,25 @@ function connect(url: string) {
   const fullUrl = url + '?Authorization=Bearer ' + getToken() + '&clientid=' + import.meta.env.VITE_APP_CLIENT_ID;
   eventSource = new EventSource(fullUrl);
 
-  // Legacy "message" event: keep existing notification behavior
-  eventSource.addEventListener('message', (e: MessageEvent) => {
+  // "notice" event: login welcome / workflow / system announcement — strongly-typed JSON payload
+  eventSource.addEventListener('notice', (e: MessageEvent) => {
     if (!e.data) return;
+    let payload: NoticePayload;
+    try {
+      payload = JSON.parse(e.data);
+    } catch (err) {
+      console.warn('SSE notice: invalid JSON payload', e.data, err);
+      return;
+    }
     useNoticeStore().addNotice({
-      message: e.data,
+      title: payload.title,
+      message: payload.message,
       read: false,
       time: new Date().toLocaleString()
     });
     ElNotification({
-      title: '消息',
-      message: e.data,
+      title: payload.title,
+      message: payload.message,
       type: 'success',
       duration: 3000
     });