UI Improvements:
- Style scrollbars with primary color accent
- Scrollbar thumb transitions on hover (40% → 60% → 80% opacity)
- Add fill tool options to toolbar (color picker + opacity)
- Support for Firefox with scrollbar-color property
Transparency Support:
- Set default canvas background to transparent
- First layer now transparent instead of white fill
- Enables creating images with transparency
- Checkerboard pattern shows through transparent areas
- Proper PNG export support with alpha channel
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Sebastian Krüger
b7b072f6d2