What does the Supabase integration actually do for me?

Supabase integration provides a one-click connection to a PostgreSQL database, authentication, file storage, serverless Edge Functions, and real-time subscriptions. From the Lovable editor, you can auto-scaffold database tables with RLS policies, authentication flows (email/password, Google OAuth), file uploads, and backend logic via Edge Functions. Secrets are stored securely in Supabase. It's a complete backend-as-a-service.