Adds components.json, cn() util, Radix + cva/clsx/tailwind-merge/
lucide-react/sonner deps, and CSS-variable color tokens mapped onto
the brand's existing pink-500 primary (#ec4899) and neutral grays.
`shadcn init` defaulted to Tailwind v4-style output (oklch colors,
`@theme`-driven CSS, `tw-animate-css`) without updating
tailwind.config.ts, which would not have compiled against the
project's pinned Tailwind v3. Hand-wrote the classic v3 integration
instead (HSL vars + tailwind.config.ts color/radius mapping +
tailwindcss-animate) rather than pull in an unplanned Tailwind
major-version migration.
Also drops the sunset/neon/pastel raw color scales from
tailwind.config.ts: grep confirmed no class ever referenced them,
they were leftover from before lib/themes.ts.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
