7a0f2e4426
Add a persisted "Mixer VU meters" switch (Settings -> Interface, on by default), backed by a DataStore boolean. When off, the mixer skips the per-frame poll loop entirely (the LaunchedEffect is keyed on the flag) and doesn't draw the meter, so disabling it removes the metering cost, not just the visuals; the volume fill and thumb render exactly as before. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>