- Replace emoji icons with professional SVG icons from Lucide Vue
- Add collapsible MusicControls with compact top-right collapse button
- Improve icon system with dynamic sizing and proper prop handling
- Disable SSR to prevent hydration issues with audio APIs
- Update IconButton to support both emoji strings and SVG components
- Optimize bottom positioning for expanded vs collapsed states
- Document new icon system in DESIGN_SYSTEM.md
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