Introduces src/themes/registry.js with:
- getTheme(id) - lookup theme config by ID
- getThemeColors(id) - get flavor object (namedTheme for built-ins, custom colors for others)
- getThemeSprite(id) - get sprite URL with fallback for custom themes
- themeList() - list available themes for UI
Updates MapView.jsx:
- Import registry functions instead of namedTheme directly
- buildStyle() uses getThemeColors() and getThemeSprite()
- Overlay add functions use isCurrentThemeDark() helper that checks
registry dark flag instead of string comparison
Reference files:
- dark-flavor-reference.json - full namedTheme('dark') output (73 flat keys + pois + landcover)
- light-flavor-reference.json - full namedTheme('light') output
- README.md - schema documentation for creating custom themes
This is a refactor only - light/dark themes render identically to before.
Custom themes can now be added to registry.js with full flavor objects.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
