Backend: swap /api/events/:artist to use Ticketmaster Discovery API
(startDateTime=now, classificationName=music, size=20, sort by date).
Maps TM response to the same {datetime, venue, offers} shape the modal
expects. Returns [] if TICKETMASTER_API_KEY is not set.
Frontend: remove all debug console.logs from events.js; drop redundant
client-side date filter (TM already filters by startDateTime server-side).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Replaces the broken open.spotify.com/get_access_token scrape with
accounts.spotify.com/api/token (Basic auth, client_credentials grant).
Adds SPOTIFY_CLIENT_ID/SECRET to config, docker-compose, and .env.example.
Health endpoint now reports spotify.configured; frontend disables the
importer and shows a setup guide when credentials are missing.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>