fix: record log content error

--bug=1052670 --user=王孝刚 应用-企业微信对接应用后，在企业微信中与应用对话，对话日志中<think></think>思考过程输出了两次 https://www.tapd.cn/57709429/s/1661186

Author: wxg0103

apps/application/chat_pipeline/step/chat_step/impl/base_chat_step.py

@@ -301,7 +301,7 @@ def execute_block(self, message_list: List[BaseMessage],
                 reasoning_content = reasoning_result.get('reasoning_content') + reasoning_result_end.get(
                     'reasoning_content')
             post_response_handler.handler(chat_id, chat_record_id, paragraph_list, problem_text,
-                                          chat_result.content, manage, self, padding_problem_text, client_id,
+                                          content, manage, self, padding_problem_text, client_id,
                                           reasoning_content=reasoning_content if reasoning_content_enable else '')
             add_access_num(client_id, client_type, manage.context.get('application_id'))
             return manage.get_base_to_response().to_block_response(str(chat_id), str(chat_record_id),