- Studio Navbar: add hamburger button + slide-out sidebar for mobile
- Studio Combobox: replace dark-hardcoded colors with light/dark variants
- Experience AppHeader: fix low-contrast borders/text/icons in light mode;
mobile sidebar now uses bg-white/bg-gray-900 instead of glass-only
- Experience globals.css: glass-card hover visible in light mode;
scrollbar thumb visible in light mode (rgba black instead of white)