fix: restore push delivery across clients

fix: stop suppressing server push notifications based on coarse online presence

fix: rely on FCM delivery for message notifications and remove duplicate Android realtime alerts

app/notifications/service.py

@@ -18,7 +18,6 @@ from app.notifications.schemas import (
     PushTokenUpsertRequest,
 )
 from app.notifications.tasks import send_mention_notification_task, send_push_notification_task
-from app.realtime.presence import is_user_online
 from app.users.repository import list_users_by_ids
 
 _MENTION_RE = re.compile(r"@([A-Za-z0-9_]{3,50})")
@@ -82,24 +81,23 @@ async def dispatch_message_notifications(db: AsyncSession, message: Message) ->
         if await is_chat_muted_for_user(db, chat_id=message.chat_id, user_id=recipient.id):
             continue
 
-        if not await is_user_online(recipient.id):
-            payload = {
-                **base_payload,
-                "type": "offline_message",
-                "text_preview": (message.text or "")[:120],
-            }
-            await create_notification_log(
-                db,
-                user_id=recipient.id,
-                event_type="offline_message",
-                payload=json.dumps(payload, ensure_ascii=True),
-            )
-            send_push_notification_task.delay(
-                recipient.id,
-                f"New message from {sender_name}",
-                (message.text or "")[:120],
-                payload,
-            )
+        payload = {
+            **base_payload,
+            "type": "message",
+            "text_preview": (message.text or "")[:120],
+        }
+        await create_notification_log(
+            db,
+            user_id=recipient.id,
+            event_type="message",
+            payload=json.dumps(payload, ensure_ascii=True),
+        )
+        send_push_notification_task.delay(
+            recipient.id,
+            f"New message from {sender_name}",
+            (message.text or "")[:120],
+            payload,
+        )
 
     await db.commit()