Coupon design documents

The QR Coupon Journeys plan spans Essentials and the existing Store/Coupon domain. Coupon is a NodeType inside the Store module, not a separate package.

• Coupon fluent API and COURSES3M
• Apple Pay, Google Pay, and Card via Stripe
• Implementation backlog

Status: design proposal, 18 September 2026. No live coupon, access grant, payment configuration, or subscription changes are made by these documents.