fix: sync chat_message rows on chat update

Author: Algorithm5838

backend/open_webui/models/chats.py

@@ -404,6 +404,9 @@ async def update_chat_by_id(self, id: str, chat: dict, db: AsyncSession | None =
 
                 await db.commit()
 
+                new_messages = (chat.get('history', {}) or {}).get('messages', {}) or {}
+                await self.reconcile_messages_by_chat_id(id, chat_item.user_id, new_messages)
+
                 return ChatModel.model_validate(chat_item)
         except Exception:
             return None