feat: bulk delete subscription + fix sub-rows showing for filtered single subs

- Add "Удалить подписки" action with red trash icon, destructive
  warning dialog (red border, irreversible action notice)
- Fix canExpand: show sub-rows when isMultiTariff && subs > 0
  (was > 1, hiding single filtered subscription results)
- i18n: deleteSubscription action + warning/hint (ru + en)

src/pages/AdminBulkActions.tsx

@@ -141,6 +141,7 @@ const SUBSCRIPTION_LEVEL_ACTIONS: Set<BulkActionType> = new Set([
   'change_tariff',
   'add_traffic',
   'set_devices',
+  'delete_subscription',
 ]);
 
 function isSubscriptionLevelAction(action: BulkActionType): boolean {
@@ -799,6 +800,7 @@ function ActionModal({
     assign_promo_group: 'admin.bulkActions.actions.assignPromoGroup',
     grant_subscription: 'admin.bulkActions.actions.grantSubscription',
     set_devices: 'admin.bulkActions.actions.setDevices',
+    delete_subscription: 'admin.bulkActions.actions.deleteSubscription',
   };
 
   const handleSubmit = () => {
@@ -965,6 +967,17 @@ function ActionModal({
             </div>
           </div>
         );
+      case 'delete_subscription':
+        return (
+          <div className="rounded-xl border border-error-500/20 bg-error-500/5 px-3 py-2.5">
+            <p className="text-sm font-medium text-error-400">
+              {t('admin.bulkActions.deleteSubscription.warning')}
+            </p>
+            <p className="mt-1 text-xs text-error-300/70">
+              {t('admin.bulkActions.deleteSubscription.hint')}
+            </p>
+          </div>
+        );
       default:
         return null;
     }
@@ -1189,6 +1202,26 @@ function FloatingActionBar({
       ),
       colorClass: 'text-accent-400 hover:bg-accent-500/10',
     },
+    {
+      type: 'delete_subscription',
+      labelKey: 'admin.bulkActions.actions.deleteSubscription',
+      icon: (
+        <svg
+          className="h-3.5 w-3.5"
+          fill="none"
+          viewBox="0 0 24 24"
+          stroke="currentColor"
+          strokeWidth={2}
+        >
+          <path
+            strokeLinecap="round"
+            strokeLinejoin="round"
+            d="M14.74 9l-.346 9m-4.788 0L9.26 9m9.968-3.21c.342.052.682.107 1.022.166m-1.022-.165L18.16 19.673a2.25 2.25 0 01-2.244 2.077H8.084a2.25 2.25 0 01-2.244-2.077L4.772 5.79m14.456 0a48.108 48.108 0 00-3.478-.397m-12 .562c.34-.059.68-.114 1.022-.165m0 0a48.11 48.11 0 013.478-.397m7.5 0v-.916c0-1.18-.91-2.164-2.09-2.201a51.964 51.964 0 00-3.32 0c-1.18.037-2.09 1.022-2.09 2.201v.916m7.5 0a48.667 48.667 0 00-7.5 0"
+          />
+        </svg>
+      ),
+      colorClass: 'text-error-400 hover:bg-error-500/10',
+    },
     {
       type: 'add_balance',
       labelKey: 'admin.bulkActions.actions.addBalance',
@@ -1779,7 +1812,7 @@ export default function AdminBulkActions() {
           const user = row.original;
           const filteredSubs = getFilteredSubs(user.subscriptions ?? []);
           const subCount = filteredSubs.length;
-          const canExpand = subCount > 1;
+          const canExpand = isMultiTariff && subCount > 0;
           const isExpanded = expandedRows[user.id] ?? false;
           return (
             <div className="flex items-center gap-2.5">
@@ -2065,7 +2098,7 @@ export default function AdminBulkActions() {
                 {table.getRowModel().rows.map((row) => {
                   const user = row.original;
                   const filteredSubs = getFilteredSubs(user.subscriptions ?? []);
-                  const canExpand = filteredSubs.length > 1;
+                  const canExpand = isMultiTariff && filteredSubs.length > 0;
                   const isExpanded = expandedRows[user.id] ?? false;
 
                   return (