Wayfinder: chart the Shopify headless commerce map

The route from "mozimo.in displays Shopify products" to "mozimo.in sells them",
as a plan with a phase spine and gates, plus the open decision tickets that
still shape it and the evidence they rest on.

- .scratch/shopify-headless-commerce/: plan.md (phases and gates), map.md (the
  wayfinder map), 10 open decision tickets
- CONTEXT.md: Storefront / Theme store / Cart / Parity vocabulary
- docs/adr/0001-0003: Checkout stays Shopify-hosted, one Variant per product,
  the checkout domain stays shop.mozimo.in
- docs/research/ and docs/shopify-catalog-inventory.md: verified store facts,
  the Cart API probe, and the catalogue inventory

Raw Shopify doc scrapes under .scratch/shopify-research/ are ignored: they are
working material, not record.

.scratch/shopify-headless-commerce/issues/05-gifting-model.md

@@ -0,0 +1,22 @@
+# The gifting model
+
+`Type:` grilling (HITL)
+`Status:` open
+
+Part of [the map](../map.md).
+
+## Question
+
+What is the gifting model on the Storefront?
+
+A gift note as a Cart attribute is in Phase 1, and wrap and delivery options are Phase 3. Settle:
+
+- Which of note, wrap and scheduled delivery actually apply to how this brand sells.
+- Where each is entered — product page, drawer, or `/cart`.
+- Whether it is per-Cart or per-line. A hamper and a bar in one order may need different messages.
+- Whether wrap or scheduled delivery carry a charge, and how that appears in the Cart.
+- What the Cart records versus what Checkout renders. Cart attributes flow through to the order; scheduled delivery in particular tends to need Shopify-side configuration, so establish what is even possible before promising it.
+
+## Answer
+
+<!-- filled on resolution -->