feat: zcatgui v0.13.0 - Phase 7 Visual Polish
Animation System:
- Easing functions: linear, quad, cubic, quartic, sine, expo,
elastic, bounce, back (in/out/inout variants)
- Animation struct with start/stop/getValue/isComplete
- AnimationManager for concurrent animations
- lerp/lerpInt interpolation helpers
Visual Effects:
- Shadow: soft/hard presets, offset, blur, spread
- Gradient: horizontal, vertical, diagonal, radial
- Blur: box blur with configurable radius
- Color utilities: interpolateColor, applyOpacity,
highlight, lowlight
Virtual Scrolling:
- VirtualScrollState for large list management
- Variable item height support
- Scrollbar with drag support
- Overscan for smooth scrolling
- ensureVisible/scrollToItem helpers
Anti-Aliased Rendering:
- drawLineAA: Xiaolin Wu's algorithm
- drawCircleAA: filled and stroke
- drawRoundedRectAA: rounded corners
- drawEllipseAA: arbitrary ellipses
- drawPolygonAA: polygon outlines
- Quality levels: none, low, medium, high, ultra
Widget count: 35 widgets
Test count: 256 tests passing
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
reugenio
70fca5177b