New SvelteKit app in frontend/ (minimal template, TypeScript, TailwindCSS v4).
Adds the app shell (dark music theme navbar + footer) and a landing page with
hero and feature cards. CTAs point to /login and /explore (built in later parts).
Verified: production build succeeds and the page renders with Tailwind styles
applied (checked via preview).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Admin
