Chat message edit, feature parity with flutter interface

backend/app_mixins/chat.py

@@ -39,6 +39,7 @@ class ChatMixin:
         with self.sql_session() as session:
             session.execute(db.Membership.__table__.delete().where(db.Membership.chat_id == chat_id))
             session.execute(db.Chat.__table__.delete().where(db.Chat.id == chat_id))
+            # TODO: Delete messages from the chat
             session.commit()
             print(f"Deleted chat #{chat_id} and its memberships.")
 
@@ -103,9 +104,8 @@ class ChatMixin:
             session.refresh(message)
 
         # Notify chat owner
-        if sender != 'user':
-            chat_owner = session.execute(select(db.Chat.user_id).where(db.Chat.id == chat_id)).scalar()
-            self.notify_message_to_user(chat_owner, message)
+        chat_owner = session.execute(select(db.Chat.user_id).where(db.Chat.id == chat_id)).scalar()
+        self.notify_message_to_user(chat_owner, message)
 
         # Notify participant agents
         agent_ids = session.execute(select(db.Membership.agent_id).where(db.Membership.chat_id == chat_id)).scalars().all()