- Replace linear-gradient with solid colors (not supported in RmlUi)
- Replace border shorthand with border-width/border-color properties
- Replace display:grid with flexbox in music quick-access cards
- Remove unsupported transition property
- Fix border-radius: 50% to use 9999px in theme.rcss
- Fix third-party app icon/label sizes to match system apps (72x72px, 16px)
- Replace data-model bindings with static values in settings
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
