feat(F-140): completed feature

backlog/features.json

@@ -5515,13 +5515,15 @@
       "description": "apps/admin/src/app/(dashboard)/orders/[id]/page.tsx currently shows only items + state + shipping (tracking, courier, note). Missing: customer name/email/phone, shipping address, billing address, payment method + last 4 + state. Data lives in identity_users, users_addresses, payments_transactions. Fix: (1) backend GET /orders/:id joins + serializes customer/address/payment. (2) admin page renders new sections. (3) keep read-only — no edits from this page.",
       "priority": "high",
       "risk": "med",
-      "status": "pending",
+      "status": "done",
       "created_at": "2026-08-21",
       "gates": {
-        "reviewer": false,
-        "security": false,
-        "qa": false
-      }
+        "reviewer": true,
+        "security": true,
+        "qa": true,
+        "close": true
+      },
+      "completed_at": "2026-08-22T11:16:27Z"
     },
     {
       "id": "POS-001",