- Opacity slider for the panel behind the keys (10–100%); keys stay opaque
- Blur Behind: asks the compositor (KWin) to blur under the rounded panel
via KF6 WindowSystem; skipped at full opacity
- Settings panel draws over the window background so changes show live,
and scrolls when it doesn't fit
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
