v0.12.8 FCM bug fix

frontend/public/sw.js

@@ -76,10 +76,21 @@ function showRosterChirpNotification(data) {
 }
 
 // ── FCM background messages ───────────────────────────────────────────────────
+// Server sends notification+data messages (mirrors the working fcm-app pattern).
+// payload.notification carries title/body; payload.data carries url/groupId.
+// Fallback to payload.data.title/body supports any older data-only messages still
+// in-flight during a deployment transition.
 if (messaging) {
   messaging.onBackgroundMessage((payload) => {
-    console.log('[SW] onBackgroundMessage received, data:', JSON.stringify(payload.data));
-    return showRosterChirpNotification(payload.data || {});
+    console.log('[SW] onBackgroundMessage received:', JSON.stringify({ notification: payload.notification, data: payload.data }));
+    const n    = payload.notification || {};
+    const d    = payload.data         || {};
+    return showRosterChirpNotification({
+      title:   n.title   || d.title   || 'New Message',
+      body:    n.body    || d.body    || '',
+      url:     d.url     || '/',
+      groupId: d.groupId || '',
+    });
   });
 } else {
   console.warn('[SW] Firebase messaging not initialised — push notifications disabled');