Add promo code toggle and activations handling in admin panel

- Implemented a new handler to toggle the active status of promo codes, allowing admins to activate or deactivate codes easily.
- Added functionality to display activations for specific promo codes, enhancing visibility into their usage.
- Updated localization files to include new messages related to promo status changes and activations in both English and Russian, improving admin experience.

locales/ru.json

@@ -412,11 +412,19 @@
   "admin_promo_card_created_by": "👤 Создал: <b>{creator}</b>",
   "admin_promo_status_active": "✅ Активен",
   "admin_promo_status_inactive": "🚫 Неактивен",
+  "admin_promo_status_activated": "активирован",
+  "admin_promo_status_deactivated": "деактивирован",
   "admin_promo_status_expired": "⏰ Истек",
   "admin_promo_status_used_up": "🔄 Исчерпан",
   "admin_promo_toggle_status_button": "🔄 Вкл/Выкл",
   "admin_promo_view_activations_button": "📋 Активации",
   "admin_promo_back_to_list_button": "⬅️ К списку",
+  "admin_promo_toggle_success": "✅ Промокод <b>{code}</b> {status}",
+  "admin_promo_toggle_failed": "❌ Ошибка изменения статуса промокода",
+  "admin_promo_no_activations": "📋 <b>Активации промокода: {code}</b>\n\n❌ Активаций не найдено",
+  "admin_promo_activations_header": "📋 <b>Активации промокода: {code}</b>\n\n",
+  "admin_promo_activation_item": "👤 User ID: <b>{user_id}</b>\n📅 Дата: <b>{date}</b>\n",
+  "admin_promo_back_to_detail_button": "⬅️ К промокоду",
   
   "admin_panel_online_label": "Онлайн",
   "admin_panel_active_label": "Активных",