修正文档

models/emoji_db.py

@@ -70,7 +70,7 @@ def check_emoji(uuid: str, connection = connect_db()) -> bool:
         logger.error(f"检查UUID失败: {uuid}, 错误: {e}")
         return False
 
-def get_emoji_content(uuid: str, content_index: str = 'url', connection = connect_db()) -> tuple | None:
+def get_emoji_content(uuid: str, content_index: str = 'url', connection = connect_db()) -> str | None:
     """
      获取图片信息，检查图片在 approved 库中检索 approved 是否为 1，为 1 则返回获取到的索引内容