Supabase fixes

• "supabaseUrl is required." and a blank white page after deploying your Lovable or Bolt app Uncaught Error: supabaseUrl is required.
  Verified by hand Last verified Oct 26, 2026 Supabase · Lovable · Bolt · Cursor · Vercel · Netlify
• permission denied for table (42501): Supabase new tables after Oct 30, 2026 {"code":"42501","message":"permission denied for table your_table"}
  As reported Not yet reproduced Supabase · Lovable · Bolt · Cursor · AI agents