fix: prevent multiple simultaneous sound plays

[chabou]

I was experimenting with some features and ran into an issue.
Currently, every sound is played multiple times simultaneously.

I added this log in the use-sound custom hook:

if (!sound.playing()) {
  const id = sound.play();
  console.log(`Playing ${id}`);
}

And with a single sound selected, this was the output:

After some digging, I found that sound.playing() is not reliable when sound.play() is called multiple times within a short timeframe.
This is because there’s a small delay before the sound state changes, due to asynchronous operations (queued actions).

The solution I found is to track this state manually on our side, to prevent additional sound.play() calls.

This bug is not noticeable to the user, but it makes things more complicated when trying to implement new sound-level features.