Fix the history directory creation for new users (#967)

Related issues: https://github.com/GaiZhenbiao/ChuanhuChatGPT/issues/965

modules/utils.py

@@ -430,6 +430,7 @@ def sorted_by_last_modified_time(list, dir):
 
 
 def get_file_names_by_type(dir, filetypes=[".json"]):
+    os.makedirs(dir, exist_ok=True)
     logging.debug(f"获取文件名列表，目录为{dir}，文件类型为{filetypes}")
     files = []
     for type in filetypes: