upstream connect error or disconnect/reset before headers. retried and the latest reset reason: remote connection failure, transport failure reason: delayed connect error: 111Set NEXT_PUBLIC_SUPABASE_URL and NEXT_PUBLIC_SUPABASE_ANON_KEY in .env.local (local) or Vercel → Environment Variables, then redeploy — Next bakes NEXT_PUBLIC_* at build time. Ensure DB has run supabase/setup_complete.sql.