Partial submissions

Multi-step forms save progress when a visitor moves to the next step, never on keystrokes. The MultiStep component shows a short notice that answers are saved as they go.

• Each form mount gets a session id (kept in sessionStorage, so a reload continues the same partial).
• Moving to the next page validates that page and sends a partial submission with pageIndex. The server upserts by session id and records pagesCompleted.
• Submitting the last page completes the same record. There is never a duplicate.
• Partials show with status partial in the dashboard, with the pages completed. The form's settings page shows completion by step.
• Partials never fire email or webhooks. Only completed submissions do.
• Partials pass through the same validation and spam checks as full submissions, and are never counted as responses.

Partial submissions show under each form's Responses, Status → Partial, with completion by step under Insights.