chore(openspec): archive add-points-mall

Sync the points-mall capability plus the frontend-mall and frontend-admin
requirements into the main specs, and write the capability Purpose the archive
leaves as a placeholder.

openspec/specs/frontend-admin/spec.md

@@ -2,7 +2,9 @@
 
 ## Purpose
 The platform console for managing users, shops and currencies.
+
 ## Requirements
+
 ### Requirement: Platform user and shop management
 Platform admins SHALL assign user roles (with shop scope), create shops, and suspend/activate shops. Suspended shops' products MUST NOT be purchasable (enforced by API, reflected in UI).
 
@@ -17,3 +19,13 @@ Platform admins SHALL view currencies and update exchange rates; new rates affec
 - **WHEN** an admin updates CNY rate_to_base
 - **THEN** the mall conversion endpoint returns amounts computed with the new rate
 
+### Requirement: Platform points mall management
+Platform admins SHALL manage points products and inspect and fulfill redemption orders through the admin console using the shared API contract. Admin SHALL expose points-mall navigation beside existing platform operations.
+
+#### Scenario: manage a redemption catalog item
+- **WHEN** a platform admin publishes a configured points product
+- **THEN** it becomes available in the customer points mall
+
+#### Scenario: points mall appears in admin navigation
+- **WHEN** an authenticated platform admin opens the admin console
+- **THEN** points-product and redemption-order management are reachable from the console nav