text: Title: 📍 Step 2: Browsing Web 执行异常
  Body: ERROR:    Exception in ASGI application
  Traceback (most recent call last):
    File "/Users/donglan/Desktop/未命名文件夹/langmanus/.venv/lib/python3.12/site-packages/sse_starlette/sse.py", line 244, in __call__
      await cancel_on_finish(lambda: self._listen_for_disconnect(receive))
    File "/Users/donglan/Desktop/未命名文件夹/langmanus/.venv/lib/python3.12/site-packages/sse_starlette/sse.py", line 233, in cancel_on_finish
      await coro()
    File "/Users/donglan/Desktop/未命名文件夹/langmanus/.venv/lib/python3.12/site-packages/sse_starlette/sse.py", line 175, in _listen_for_disconnect
      message = await receive()
                ^^^^^^^^^^^^^^^
    File "/Users/donglan/Desktop/未命名文件夹/langmanus/.venv/lib/python3.12/site-packages/uvicorn/protocols/http/h11_impl.py", line 531, in receive
      await self.message_event.wait()
    File "/Users/donglan/.local/share/uv/python/cpython-3.12.9-macos-aarch64-none/lib/python3.12/asyncio/locks.py", line 212, in wait
      await fut
  asyncio.exceptions.CancelledError: Cancelled by cancel scope 12b505100
  
  During handling of the above exception, another exception occurred:
  
    + Exception Group Traceback (most recent call last):
    |   File "/Users/donglan/Desktop/未命名文件夹/langmanus/.venv/lib/python3.12/site-packages/uvicorn/protocols/http/h11_impl.py", line 403, in run_asgi
    |     result = await app(  # type: ignore[func-returns-value]
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |   File "/Users/donglan/Desktop/未命名文件夹/langmanus/.venv/lib/python3.12/site-packages/uvicorn/middleware/proxy_headers.py", line 60, in __call__
    |     return await self.app(scope, receive, send)
  
  ![Image](https://github.com/user-attachments/assets/e2af463e-a015-4173-8589-723c1b0d078d)
  
    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^