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/i18n/translations.ts

@@ -1230,6 +1230,7 @@ export interface Translations {
   adminModeration: {
     search: string;
     selectAllRows: string;
+    itemsCount: string;
     allStatuses: string;
     allRatings: string;
     rating: string;
@@ -1286,6 +1287,16 @@ export interface Translations {
       rejected: string;
       spam: string;
     };
+    timelineEvent: {
+      submitted: string;
+      statusChanged: string;
+      restored: string;
+      hidden: string;
+    };
+    actor: {
+      admin: string;
+      customer: string;
+    };
     targetType: {
       product: string;
       review: string;
@@ -1314,6 +1325,11 @@ export interface Translations {
     createdAt: string;
     items: string;
     timeline: string;
+    timelineEvent: {
+      created: string;
+      statusChanged: string;
+      refundRequested: string;
+    };
     notes: string;
     internalNotes: string;
     addNote: string;
@@ -1348,6 +1364,7 @@ export interface Translations {
       refund_requested: string;
       refunded: string;
     };
+    itemsCount: string;
     ordersToday: string;
     paidCount: string;
     customersCount: string;
@@ -1359,6 +1376,7 @@ export interface Translations {
     alertRefundRequested: string;
   };
   adminCustomers: {
+    back: string;
     search: string;
     name: string;
     email: string;
@@ -1757,11 +1775,34 @@ export interface Translations {
       expired: string;
       revoked: string;
     };
+    roleValue: {
+      owner: string;
+      admin: string;
+      editor: string;
+      viewer: string;
+    };
+    permission: {
+      all: string;
+      productsManage: string;
+      productsView: string;
+      categoriesManage: string;
+      ordersManage: string;
+      ordersView: string;
+      mediaManage: string;
+    };
+    actor: {
+      admin: string;
+    };
+    audit: {
+      roleChanged: string;
+      statusChanged: string;
+    };
   };
   adminTransactions: {
     search: string;
     type: string;
     method: string;
+    itemsCount: string;
     fraud: string;
     flagged: string;
     flag: string;
@@ -1783,6 +1824,11 @@ export interface Translations {
       refund: string;
       qr_payment: string;
     };
+    methodValue: {
+      card: string;
+      qr: string;
+      cash_on_delivery: string;
+    };
   };
   adminMonitoring: {
     eventsEmptyTitle: string;