fix(backoffice): wording quality pass across orders, moderation, transactions, users, customers

- Replaced hardcoded English audit/timeline text (order status changes,
  review moderation events, user role/status changes) with proper
  adminXxx.timelineEvent.*/adminUsers.audit.* i18n keys, so Recent
  Activity/Timeline/Audit panels no longer mix English into ru/hy UI.
- Translated raw internal codes rendered directly to users: transaction
  payment method ('card'/'qr'/'cash_on_delivery' -> adminTransactions.methodValue.*)
  and user roles/permissions ('products.manage' etc -> adminUsers.roleValue.*/
  adminUsers.permission.*), replacing developer-facing enum leakage with
  real copy.
- Fixed wrong-noun list-footer counts: Orders/Transactions/Moderation
  list pages all reused adminProducts.items ("N товаров"/"N products")
  regardless of what was actually listed; each now has its own itemsCount
  key ("N заказов", "N транзакций", "N отзывов").
- Fixed customer detail page's "Back" button reusing adminOrders.back
  ("Back to orders") instead of a customers-specific label.
- Added translation keys to en/ru/hy + translations.ts interface for all
  of the above.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/features/admin/users/services/admin-users-local.gateway.ts

@@ -89,7 +89,9 @@ export class AdminUsersLocalGateway implements AdminUsersGateway {
     this.users = users.map(user => user.id === userId ? updated : user);
     this.audit[userId] = [
       ...(this.audit[userId] ?? []),
-      { action: roleId ? `Role changed to ${roleId}` : `Status changed to ${status}`, actor: 'admin', timestamp: new Date().toISOString() },
+      roleId
+        ? { eventKey: 'roleChanged', roleId, actor: 'admin', timestamp: new Date().toISOString() }
+        : { eventKey: 'statusChanged', status, actor: 'admin', timestamp: new Date().toISOString() },
     ];
     return of(updated).pipe(delay(50));
   }