Add --port CLI flag to configure the API server port

[alimaandev]

Summary

The API server (desktop/api_server.py) hardcodes its bind address to \127.0.0.1:8080\ (line ~1608) and is launched from main.py via python api_server.py (lines ~88-92). The port cannot be changed without editing code.

Goal

Add a --port CLI flag to main.py so users can run python main.py --ui --port 9090 (or similar) and the API server binds to the chosen port. The flag should default to 8080.

Tasks

• Add --port argument to the argparse parser in main.py
• Pass the port through to the �pi_cmd subprocess launch
• Update docs/api.md / README quick-start if port is mentioned

Acceptance criteria

• python main.py --ui --port 9090 launches the API server on 9090
• Default behavior unchanged (8080)
• A small test exists in ests/test_main.py asserting the flag default

Labels

good first issue, help wanted