Enhance payment method display logic and localization updates

- Improved the logic for displaying payment method details, including card type and last four digits, to provide a clearer user experience.
- Updated localization strings to reflect changes in payment method terminology, ensuring consistency across user-facing messages.
- Refactored payment method handlers to utilize the new display logic, enhancing the overall management of payment methods.

locales/en.json

@@ -377,14 +377,15 @@
   "subscription_autorenew_updated": "Auto-renew settings updated.",
   "payment_methods_manage_button": "💳 Payment Methods",
   "payment_methods_title": "💳 <b>Payment Methods</b>",
-  "payment_method_bind_button": "➕ Add card",
+  "payment_method_bind_button": "➕ Add method",
   "payment_method_delete_button": "🗑 Remove",
   "payment_method_view_button": "ℹ️ Details",
-  "payment_method_none": "You don't have a saved card yet.",
-  "payment_method_bound_success": "✅ Card successfully added.",
+  "payment_method_none": "You don't have a saved payment method yet.",
+  "payment_method_bound_success": "✅ Payment method added.",
   "payment_method_deleted_success": "✅ Payment method removed.",
   "payment_method_delete_confirm": "Remove saved payment method?",
-  "payment_method_card_title": "💳 Card {network} ••••{last4}",
+  "payment_method_card_title": "💳 {network} ••••{last4}",
+  "payment_method_generic_title": "💳 {network}",
   "payment_method_added_at": "Added: {date}",
   "payment_method_last_tx": "Last transaction: {date}",
   "payment_method_tx_history_title": "📜 Transactions history",

locales/ru.json

@@ -376,14 +376,15 @@
   "subscription_autorenew_updated": "Настройки автопродления обновлены.",
   "payment_methods_manage_button": "💳 Способы оплаты",
   "payment_methods_title": "💳 <b>Способы оплаты</b>",
-  "payment_method_bind_button": "➕ Привязать карту",
+  "payment_method_bind_button": "➕ Добавить способ",
   "payment_method_delete_button": "🗑 Удалить",
   "payment_method_view_button": "ℹ️ Детали",
-  "payment_method_none": "У вас пока нет сохранённой карты.",
-  "payment_method_bound_success": "✅ Карта успешно привязана.",
+  "payment_method_none": "У вас пока нет сохранённого способа оплаты.",
+  "payment_method_bound_success": "✅ Способ оплаты добавлен.",
   "payment_method_deleted_success": "✅ Способ оплаты удалён.",
   "payment_method_delete_confirm": "Удалить сохранённый способ оплаты?",
-  "payment_method_card_title": "💳 Карта {network} ••••{last4}",
+  "payment_method_card_title": "💳 {network} ••••{last4}",
+  "payment_method_generic_title": "💳 {network}",
   "payment_method_added_at": "Добавлена: {date}",
   "payment_method_last_tx": "Последняя операция: {date}",
   "payment_method_tx_history_title": "📜 История операций",