refactor(coupons): единый formatShortDate + честная статистика списка + retry

- formatShortDate вынесен в utils/format вместо трёх копий formatDate +
  инлайн localeMap (AdminCoupons/AdminCouponDetail/CouponStatus)
- список партий: агрегатные карточки Активны/Погашено/Отозвано считались
  только по текущей странице и противоречили глобальному total «Партий» —
  показываем их лишь когда весь набор влезает на одну страницу
- CouponStatus: retry:false на публичном статусе (404 — ожидаемый ответ на
  невалидный/погашенный токен, ретрай зря бьёт rate-limited эндпоинт)

src/pages/AdminCouponDetail.tsx

@@ -6,7 +6,7 @@ import i18n from '../i18n';
 import { couponsApi } from '../api/coupons';
 import { usePlatform } from '../platform/hooks/usePlatform';
 import { copyToClipboard } from '../utils/clipboard';
-import { formatPrice } from '../utils/format';
+import { formatPrice, formatShortDate } from '../utils/format';
 import { getApiErrorMessage } from '../utils/api-error';
 import { useToast } from '../components/Toast';
 import { PermissionGate } from '../components/auth/PermissionGate';
@@ -21,17 +21,6 @@ import {
 } from '@/components/icons';
 import { StatCard } from '../components/stats';
 
-const formatDate = (date: string | null): string => {
-  if (!date) return '-';
-  const localeMap: Record<string, string> = { ru: 'ru-RU', en: 'en-US', zh: 'zh-CN', fa: 'fa-IR' };
-  const locale = localeMap[i18n.language] || 'ru-RU';
-  return new Date(date).toLocaleDateString(locale, {
-    day: '2-digit',
-    month: '2-digit',
-    year: 'numeric',
-  });
-};
-
 export default function AdminCouponDetail() {
   const { t } = useTranslation();
   const navigate = useNavigate();
@@ -184,13 +173,13 @@ export default function AdminCouponDetail() {
           <span className="text-dark-400">{t('admin.coupons.detail.validUntil')}</span>
           <span className="text-dark-100">
             {batch.valid_until
-              ? formatDate(batch.valid_until)
+              ? formatShortDate(batch.valid_until)
               : t('admin.coupons.detail.perpetual')}
           </span>
         </div>
         <div className="flex justify-between gap-4">
           <span className="text-dark-400">{t('admin.coupons.detail.createdAt')}</span>
-          <span className="text-dark-100">{formatDate(batch.created_at)}</span>
+          <span className="text-dark-100">{formatShortDate(batch.created_at)}</span>
         </div>
       </div>
 

src/pages/AdminCoupons.tsx

@@ -5,7 +5,7 @@ import { useTranslation } from 'react-i18next';
 import i18n from '../i18n';
 import { couponsApi, CouponBatch } from '../api/coupons';
 import { usePlatform } from '../platform/hooks/usePlatform';
-import { formatPrice } from '../utils/format';
+import { formatPrice, formatShortDate } from '../utils/format';
 import {
   BackIcon,
   PlusIcon,
@@ -18,17 +18,6 @@ import { StatCard } from '../components/stats';
 
 const PAGE_SIZE = 50;
 
-const formatDate = (date: string | null): string => {
-  if (!date) return '-';
-  const localeMap: Record<string, string> = { ru: 'ru-RU', en: 'en-US', zh: 'zh-CN', fa: 'fa-IR' };
-  const locale = localeMap[i18n.language] || 'ru-RU';
-  return new Date(date).toLocaleDateString(locale, {
-    day: '2-digit',
-    month: '2-digit',
-    year: 'numeric',
-  });
-};
-
 export default function AdminCoupons() {
   const { t } = useTranslation();
   const navigate = useNavigate();
@@ -74,8 +63,10 @@ export default function AdminCoupons() {
         </button>
       </div>
 
-      {/* Stats Overview */}
-      {batches.length > 0 && (
+      {/* Stats Overview — the Active/Redeemed/Revoked cards sum only the loaded
+          page, so show them only when the whole set fits one page; otherwise
+          they would contradict the global "Batches" total. */}
+      {batches.length > 0 && total <= PAGE_SIZE && (
         <div className="mb-6 grid grid-cols-2 gap-3 sm:grid-cols-4">
           <StatCard
             label={t('admin.coupons.stats.batches')}
@@ -159,7 +150,7 @@ export default function AdminCoupons() {
                     )}
                     {batch.valid_until && (
                       <span>
-                        {t('admin.coupons.list.until')}: {formatDate(batch.valid_until)}
+                        {t('admin.coupons.list.until')}: {formatShortDate(batch.valid_until)}
                       </span>
                     )}
                   </div>

src/pages/CouponStatus.tsx

@@ -5,22 +5,11 @@ import { useTranslation } from 'react-i18next';
 import axios from 'axios';
 import { couponsApi, CouponRedeemResponse } from '../api/coupons';
 import { useAuthStore } from '../store/auth';
-import i18n from '../i18n';
+import { formatShortDate } from '../utils/format';
 import { Spinner } from '@/components/ui/Spinner';
 import { AnimatedCheckmark } from '@/components/ui/AnimatedCheckmark';
 import { TicketIcon } from '@/components/icons';
 
-const formatDate = (date: string | null): string => {
-  if (!date) return '-';
-  const localeMap: Record<string, string> = { ru: 'ru-RU', en: 'en-US', zh: 'zh-CN', fa: 'fa-IR' };
-  const locale = localeMap[i18n.language] || 'ru-RU';
-  return new Date(date).toLocaleDateString(locale, {
-    day: '2-digit',
-    month: '2-digit',
-    year: 'numeric',
-  });
-};
-
 function Shell({ children }: { children: React.ReactNode }) {
   return (
     <div className="flex min-h-dvh items-center justify-center bg-dark-950 px-4 py-10">
@@ -60,7 +49,10 @@ export default function CouponStatus() {
     queryKey: ['coupon-status', token],
     queryFn: () => couponsApi.getCouponStatus(token!),
     enabled: !!token,
-    retry: 1,
+    // 404 is the expected answer for an invalid/consumed/expired token — the
+    // common case for a shared link — so retrying only wastes a request against
+    // the rate-limited public endpoint.
+    retry: false,
   });
 
   const redeemMutation = useMutation({
@@ -110,7 +102,7 @@ export default function CouponStatus() {
             {redeemed.end_date && (
               <>
                 <br />
-                {t('coupon.success.until')} {formatDate(redeemed.end_date)}
+                {t('coupon.success.until')} {formatShortDate(redeemed.end_date)}
               </>
             )}
           </p>
@@ -142,7 +134,9 @@ export default function CouponStatus() {
           {coupon.valid_until && (
             <div className="flex justify-between gap-4">
               <span className="text-dark-400">{t('coupon.validUntil')}</span>
-              <span className="font-medium text-dark-100">{formatDate(coupon.valid_until)}</span>
+              <span className="font-medium text-dark-100">
+                {formatShortDate(coupon.valid_until)}
+              </span>
             </div>
           )}
         </div>

src/utils/format.ts

@@ -59,3 +59,21 @@ export function formatPrice(kopeks: number, lang?: string): string {
     return `${rounded} ${config.symbol}`;
   }
 }
+
+const SHORT_DATE_LOCALE_MAP: Record<string, string> = {
+  ru: 'ru-RU',
+  en: 'en-US',
+  zh: 'zh-CN',
+  fa: 'fa-IR',
+};
+
+/** Date-only (dd.mm.yyyy) in the active UI locale; '-' for a null date. */
+export function formatShortDate(date: string | null): string {
+  if (!date) return '-';
+  const locale = SHORT_DATE_LOCALE_MAP[i18next.language] || 'ru-RU';
+  return new Date(date).toLocaleDateString(locale, {
+    day: '2-digit',
+    month: '2-digit',
+    year: 'numeric',
+  });
+}