fix arguement bug

app.py

@@ -196,7 +196,7 @@ def download_public_file(url: str, local_path: str):
         print(f"Error downloading public file {url}: {e}")
         return False
 
-def stream_simulation_results(result_folder: str, task_id: str, fps: int = 30, request: gr.Request):
+def stream_simulation_results(result_folder: str, task_id: str, request: gr.Request, fps: int = 30):
     """
     流式输出仿真结果，从公共OSS读取图片