feat(mall): address book wave 7 frontend, contract, and archive

Live addresses domain for the mall: shared contract (AddressBookEntry +
five client methods), mock adapter state v3, live domain pick, addresses
page CRUD, checkout saved-address picker with manual fallback, demo seed,
and the archived change plus address-book capability spec.

apps/mall/plugins/api.ts

@@ -17,7 +17,8 @@ type LiveDomain =
   | "cart"
   | "orders"
   | "shipments"
-  | "invoices";
+  | "invoices"
+  | "addresses";
 
 /**
  * Explicit per-domain method picks rather than a string allowlist: indexing
@@ -56,6 +57,13 @@ const LIVE_PICKS = {
     requestInvoice: a.requestInvoice,
     listMyInvoices: a.listMyInvoices,
   }),
+  addresses: (a: ApiClient) => ({
+    listMyAddresses: a.listMyAddresses,
+    createAddress: a.createAddress,
+    updateAddress: a.updateAddress,
+    deleteAddress: a.deleteAddress,
+    setDefaultAddress: a.setDefaultAddress,
+  }),
 } satisfies Record<LiveDomain, (a: ApiClient) => Partial<ApiClient>>;
 
 const KNOWN_DOMAINS = Object.keys(LIVE_PICKS) as LiveDomain[];
@@ -72,6 +80,7 @@ const DEFAULT_LIVE_DOMAINS: LiveDomain[] = [
   "orders",
   "shipments",
   "invoices",
+  "addresses",
 ];
 
 export default defineNuxtPlugin(() => {