chore(openspec): archive replace-mock-api-wave-5

The merge creates the store-directory capability (two requirements, six
scenarios) and updates the mall's store-and-marketing requirement so the store
directory and store home read live shops and order surfaces name their shop.

openspec validate --all --strict stays green at 13 specs.

openspec/changes/archive/2026-09-17-replace-mock-api-wave-5/specs/frontend-mall/spec.md

@@ -0,0 +1,18 @@
+# Spec Delta
+
+## MODIFIED Requirements
+
+### Requirement: Store and marketing pages
+The mall SHALL provide a store directory and store home reading live shops from the shop API, with each store's products coming from the catalog API, and SHALL keep the timed seckill page, collective-buy list and points-mall home on fixed bilingual content for now. The cart, payment and order surfaces SHALL show each order's shop by name from the shop API rather than a generic label. Marketing pages MAY be display-only except navigation to product detail.
+
+#### Scenario: navigate storefront discovery channels
+- **WHEN** a shopper opens stores, seckill, collective or integral routes
+- **THEN** each page renders the appropriate B2B2C mall-style banner/filter/session/card layout, the store directory and store home list real shops, and product links resolve to product detail
+
+#### Scenario: order surfaces name the shop
+- **WHEN** a shopper views a cart line, a payment group or an order card
+- **THEN** the shop is shown by its name, not a placeholder
+
+#### Scenario: a shop without a profile still renders
+- **WHEN** a shop has no profile row
+- **THEN** the directory and store home render it without inventing logo, scores or copy