Sheet URLs — one Google Sheet per form (admin only)
Clients never see these URLs. After saving, update api/forms-config.json in the repo and redeploy to Vercel.
Add new form
Google Apps Script
Paste into Extensions → Apps Script on each form's sheet
⚠ Important: Use doGet (not doPost). Paste this same script on every form's sheet. Deploy as Web app → Me → Anyone. After saving, create a New Deployment and paste the /exec URL above.