HUGE PERFORMANCE UPDATE

I noticed a few things after some users reported poor performance. For those interested in the technical details, look here:

Changelog:

- Now-playing daemon: The helper now runs as a long-lived background process (npwatch) and writes track info continuously. Previously a fresh cmd.exe + .NET 8 was spawned every second... that was the single biggest frame hitch!

- Volume daemon respawn loop fixed: MC.init() is now idempotent. The volume daemon was being killed every frame by a lock-file delete and respawned every 3 seconds, that was the periodic stutter pattern, I guess. Cleanup now runs exactly once at app startup.

- Visualizer pauses when "nobody is watching": The FFT file is only read when a CarAmp window is actively rendering. Saves 20 file reads/second in the default case.

- DSP state IPC: 20 Hz → 10 Hz. The DSP smooths every parameter per-sample at audio rate anyway, so no audible change. Halves file-open load on the hot path.

- CarPlay IPC short-circuits when the sub-app is missing: No more ac.store/load + 7-arg string.format every 500 ms for users who don't have the CarPlay sub-app installed.

- Door detection shortcut: On cars without door meshes the expensive transform path is skipped — only the front-door property fallback runs.

- Clean shutdown: onShutdown stops both daemons via lock-file delete.

--> TAKE ME THERE <--

Please let me know if things are going better for you now!