Audio and undervolt fixes.
- PlayStation audio: heavy fights could crackle; the frontend now skips a few frames to keep audio fed (capped at 0.1s, invisible, true 60fps). Games with headroom untouched.
- Undervolt: the voltage hold was hammering the I2C bus 400x/s; it now touches the bus only when the clock changes.
Copy MinUI.zip to the card root to update. Games, saves, settings, and calibrations carry over.