修复历史记录文件夹可能会不存在的问题, thanks @libukai ! #722

modules/utils.py

@@ -580,6 +580,7 @@ def get_latest_filepath(dirname):
 
 def get_history_filepath(username):
     dirname = os.path.join(HISTORY_DIR, username)
+    os.mkdir(dirname, exist_ok=True)
     latest_file = get_latest_filepath(dirname)
     if not latest_file:
         latest_file = new_auto_history_filename(dirname)