Introduces new color properties for the URL bar and tab strip in all themes, updates the theme system and CSS to support these, and ensures the renderer applies the correct colors to the main UI. This allows each theme to fully customize the appearance of the URL bar and tabs for a more cohesive look.
Introduces seven new built-in themes (cyberpunk, midnight-rose, arctic-ice, cherry-blossom, cosmic-purple, emerald-dream, mocha-coffee, lavender-fields) with corresponding JSON files, updates the FEATURES documentation, and enhances the settings UI to display and select these themes. Also updates theme loading logic in theme-manager.js and improves the theme selector layout for better usability.
andrew