The python server is not normally working

### Description of the bug:

```
(venv) C:\Users\a15\example-chat-app\server-python [main ≡ +1 ~0 -0 !]> python app.py
* Serving Flask app 'app'
* Debug mode: off
WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
* Running on http://127.0.0.1:9000
Press CTRL+C to quit
127.0.0.1 - - [09/Jun/2025 11:29:53] "GET / HTTP/1.1" 404 -
127.0.0.1 - - [09/Jun/2025 11:29:53] "GET /favicon.ico HTTP/1.1" 404 -
127.0.0.1 - - [09/Jun/2025 11:29:55] "GET / HTTP/1.1" 404 -
127.0.0.1 - - [09/Jun/2025 11:30:17] "GET /chat HTTP/1.1" 405 -
127.0.0.1 - - [09/Jun/2025 11:30:21] "GET /chat/ HTTP/1.1" 404 -
127.0.0.1 - - [09/Jun/2025 11:30:30] "GET /stream HTTP/1.1" 405 -
127.0.0.1 - - [09/Jun/2025 11:30:33] "GET /stream/ HTTP/1.1" 404 -
```

### Actual vs expected behavior:

_No response_

### Any other information you'd like to share?

_No response_