SoundPlayer

Plays short SFX by SoundKey and fires haptics by HapticPattern.

Contract:

• All methods are fire-and-forget and must never throw (a missing audio device, a denied haptic permission, or a headless CI box must degrade to a silent no-op).

• playSound / haptic are expected to be called by the caller only when its master sound toggle is ON; implementations need not re-check a preference.

• release frees native resources (SoundPool, audio lines). Idempotent.

The jvm actual genuinely emits audio (a tiny javax.sound tone synth) so the desktop build is verifiably audible; the wasm actual uses Web Audio where available and otherwise degrades to a no-op.