The previous os.execv approach and console_script detection both
failed on Windows. Now restart always spawns `python -m media_server.main`
via subprocess.Popen with start_new_session, which works regardless
of how the server was originally started.
- Rewrite tray to run on main thread (pystray owns message loop, uvicorn
in background thread) — fixes unresponsive confirmation dialogs
- Use native Windows MessageBoxW instead of tkinter (embedded Python
has no tkinter)
- Pin numpy <2.0 to fix soundcard's numpy.fromstring (removed in 2.0)
- Strip transitive numpy 2.x wheels in build script
- Installer copies config.example.yaml as config.yaml on fresh install
- Suppress noisy screen_brightness_control warnings
Adds pystray-based tray icon (green play button) that runs alongside
uvicorn. Double-click opens the web UI in the browser, Exit triggers
graceful shutdown. Disabled with --no-tray flag for headless/service mode.
alexei.dolgolyov