One-time setup required to enable uploads.
Follow these steps (free, takes ~5 minutes):

1. Go to supabase.com → create a free account & new project
2. In your project: go to Storage → create a bucket named family-photos (set to Public)
3. Go to SQL Editor and run the setup SQL from SUPABASE_SETUP.sql
4. Go to Project Settings → API → copy your Project URL and anon key
5. Edit index.html, find SUPABASE_URL and SUPABASE_ANON_KEY and paste your values, then redeploy