DoorPin — technical spike

Post-purchase delivery-location capture for weak-address markets. This install is a technical spike build, not the finished app — see DoorPin_Claude_Handoff.md for the full spec.

• Post-purchase capture. Customer drops their exact delivery pin on the Thank You page — no checkout friction.
• GPS or manual pin. Falls back to a draggable map pin if browser geolocation is denied or unavailable.
• Merchant-visible status. See which orders have a verified location before fulfillment, with a one-click map link.