Update app_utils.py

app_utils.py

@@ -177,7 +177,7 @@ def list_oss_files(folder_path: str) -> List[str]:
     for obj in oss2.ObjectIterator(bucket, prefix=folder_path):
         if not obj.key.endswith('/'):  # 排除目录本身
             files.append(obj.key)
-    return sorted(files)
+    return sorted(files, key=lambda x: os.path.splitext(x)[0]) 
 
 def download_oss_file(oss_path: str, local_path: str):
     """从OSS下载文件到本地"""