Replaces the n8n form trigger. Same fields, better UX. On submit, the form POSTs to the n8n webhook (fire-and-forget) and the user is redirected to a generating-state page that subscribes to Convex by estimate number. The session shows up in real-time when n8n finishes — no waiting on webhook response, no broken UX if generation takes 60+ seconds.
capture="environment" opens the rear camera directly.