feat: show affected subscriptions count on tariff deletion

Update delete mutation to use affected_subscriptions from API response.
Show contextual success notification with subscription count.
Add deleteSuccessWithSubscriptions translation key in all 4 locales.

src/api/tariffs.ts

@@ -208,7 +208,9 @@ export const tariffsApi = {
   },
 
   // Delete tariff
-  deleteTariff: async (tariffId: number): Promise<{ message: string }> => {
+  deleteTariff: async (
+    tariffId: number,
+  ): Promise<{ message: string; affected_subscriptions: number }> => {
     const response = await apiClient.delete(`/cabinet/admin/tariffs/${tariffId}`);
     return response.data;
   },

src/locales/en.json

@@ -1370,6 +1370,7 @@
       "confirmDeleteText": "This action cannot be undone. The tariff will be permanently deleted.",
       "confirmDeleteWithSubscriptions": "This tariff has {{count}} active subscriptions. After deletion, users will need to select a new tariff when renewing.",
       "deleteSuccess": "Tariff deleted successfully",
+      "deleteSuccessWithSubscriptions": "Tariff deleted. {{count}} subscriptions reset — users will choose a new tariff on renewal.",
       "saveOrder": "Save order",
       "orderSaved": "Order saved",
       "dragToReorder": "Drag to reorder",

src/locales/fa.json

@@ -1076,6 +1076,7 @@
       "confirmDeleteText": "این عمل قابل بازگشت نیست. تعرفه برای همیشه حذف می‌شود.",
       "confirmDeleteWithSubscriptions": "این تعرفه {{count}} اشتراک فعال دارد. پس از حذف، کاربران هنگام تمدید باید تعرفه جدید انتخاب کنند.",
       "deleteSuccess": "تعرفه با موفقیت حذف شد",
+      "deleteSuccessWithSubscriptions": "تعرفه حذف شد. تعرفه {{count}} اشتراک بازنشانی شد — کاربران هنگام تمدید تعرفه جدید انتخاب می‌کنند.",
       "saveOrder": "ذخیره ترتیب",
       "orderSaved": "ترتیب ذخیره شد",
       "dragToReorder": "برای تغییر ترتیب بکشید",

src/locales/ru.json

@@ -1888,6 +1888,7 @@
       "confirmDeleteText": "Это действие нельзя отменить. Тариф будет удалён навсегда.",
       "confirmDeleteWithSubscriptions": "У этого тарифа {{count}} активных подписок. При удалении пользователям потребуется выбрать новый тариф при продлении.",
       "deleteSuccess": "Тариф успешно удален",
+      "deleteSuccessWithSubscriptions": "Тариф удален. У {{count}} подписок сброшен тариф — при продлении пользователи выберут новый.",
       "saveOrder": "Сохранить порядок",
       "orderSaved": "Порядок сохранён",
       "dragToReorder": "Перетащите для изменения порядка",

src/locales/zh.json

@@ -1114,6 +1114,7 @@
       "confirmDeleteText": "此操作不可撤销。套餐将被永久删除。",
       "confirmDeleteWithSubscriptions": "此套餐有 {{count}} 个活跃订阅。删除后，用户续订时需要选择新套餐。",
       "deleteSuccess": "套餐删除成功",
+      "deleteSuccessWithSubscriptions": "套餐已删除。{{count}} 个订阅已重置 — 用户续订时将选择新套餐。",
       "saveOrder": "保存排序",
       "orderSaved": "排序已保存",
       "dragToReorder": "拖动以重新排序",

src/pages/AdminTariffs.tsx

@@ -282,9 +282,15 @@ export default function AdminTariffs() {
   // Mutations
   const deleteMutation = useMutation({
     mutationFn: tariffsApi.deleteTariff,
-    onSuccess: () => {
+    onSuccess: (data) => {
       queryClient.invalidateQueries({ queryKey: ['admin-tariffs'] });
-      notify.success(t('admin.tariffs.deleteSuccess'));
+      if (data.affected_subscriptions > 0) {
+        notify.success(
+          t('admin.tariffs.deleteSuccessWithSubscriptions', { count: data.affected_subscriptions }),
+        );
+      } else {
+        notify.success(t('admin.tariffs.deleteSuccess'));
+      }
     },
   });