- Implement ThemeContext with CSS variables for dynamic theming
- Add theme presets: Cyberpunk, Windows Classic, Dark Modern, Matrix, Industrial, Otaku Mode, Pink Pink
- Add theme selector UI in Footer with color preview
- Theme persists to localStorage
- Each theme has unique background effects, colors, and styling
- Otaku Mode: anime-style dark purple with pink/purple glow and star effects
- Pink Pink: cute pastel pink with heart pattern overlay
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
