- lm_studio_fn: use urlparse to extract port from server_address so that
addresses with an http:// prefix (e.g. http://127.0.0.1:1234, as
documented in README) no longer break the Docker URL construction.
Previously split(":")[1] returned "//127.0.0.1" instead of the port
number, producing a malformed URL.
Also fix the non-Docker path to avoid prepending http:// when the address
already includes a scheme.
- api.py: pass the computed port variable to uvicorn.run() instead of the
hardcoded literal 7777, so that BACKEND_PORT environment variable is
actually honoured when starting the server directly.
