[UIPKGE] Compact theme customization popover. Light/Dark/System mode (via next-themes), six curated color presets that overwrite `--primary` / `--primary-foreground` / `--ring`, and a radius slider bound to `--radius`. Persists to localStorage and exposes a one-click Copy CSS for the active token set.
pnpm dlx shadcn@latest add "https://registry.directory/r/uday-a/theme-customize.json"