feat: regenerate in Chat, agent and Chatflow app (#7661)

api/core/app/apps/agent_chat/app_generator.py

@@ -127,6 +127,7 @@ class AgentChatAppGenerator(MessageBasedAppGenerator):
             inputs=conversation.inputs if conversation else self._get_cleaned_inputs(inputs, app_config),
             query=query,
             files=file_objs,
+            parent_message_id=args.get("parent_message_id"),
             user_id=user.id,
             stream=stream,
             invoke_from=invoke_from,