feat(topup): direct-open payment page when method.open_url_direct is set

User asked for the gift-style seamless flow on balance top-up: provider
checkout opens inside Telegram MiniApp WebView without a click-to-open link
panel. Made it an admin per-method toggle so it can be enabled selectively.

src/pages/TopUpAmount.tsx — on topup mutation success:
* Move saveTopUpPendingInfo to BEFORE any redirect so /balance/top-up/result
  can still pick up the pending payment after the provider's return_url fires
* If method?.open_url_direct === true AND the URL is not a t.me/ deep link
  (Stars/CryptoBot), window.location.href = redirectUrl and return early
* Otherwise fall through to the existing setPaymentUrl panel — preserves
  current behavior for methods without the flag enabled

The t.me/ guard is important: window.location.href to a Telegram deep link
inside a MiniApp WebView is unreliable (native shell cant always intercept).
Those URLs continue to go through openTelegramLink / openInvoice in the panel
path. Stars never reaches topUpMutation.onSuccess anyway (handled by the
separate starsPaymentMutation); the guard is defense-in-depth for CryptoBot
and any future t.me-deep-link providers.

src/pages/AdminPaymentMethodEdit.tsx — added Open URL directly toggle with
the same slider styling as the is_enabled toggle. Defaults to off.

src/types/index.ts
* PaymentMethod.open_url_direct?: boolean (user-facing)
* PaymentMethodConfig.open_url_direct: boolean (admin shape)

Translations added for ru/en/zh/fa with a hint clarifying behavior and the
t.me/ exemption.

src/pages/AdminPaymentMethodEdit.tsx

@@ -66,6 +66,7 @@ export default function AdminPaymentMethodEdit() {
   const [firstTopupFilter, setFirstTopupFilter] = useState<'any' | 'yes' | 'no'>('any');
   const [promoGroupFilterMode, setPromoGroupFilterMode] = useState<'all' | 'selected'>('all');
   const [selectedPromoGroupIds, setSelectedPromoGroupIds] = useState<number[]>([]);
+  const [openUrlDirect, setOpenUrlDirect] = useState(false);
 
   // Initialize state when config loads
   useEffect(() => {
@@ -79,6 +80,7 @@ export default function AdminPaymentMethodEdit() {
       setFirstTopupFilter(config.first_topup_filter);
       setPromoGroupFilterMode(config.promo_group_filter_mode);
       setSelectedPromoGroupIds(config.allowed_promo_group_ids);
+      setOpenUrlDirect(config.open_url_direct);
     }
   }, [config]);
 
@@ -100,6 +102,7 @@ export default function AdminPaymentMethodEdit() {
       first_topup_filter: firstTopupFilter,
       promo_group_filter_mode: promoGroupFilterMode,
       allowed_promo_group_ids: promoGroupFilterMode === 'selected' ? selectedPromoGroupIds : [],
+      open_url_direct: openUrlDirect,
     };
 
     // Display name
@@ -215,6 +218,34 @@ export default function AdminPaymentMethodEdit() {
           </button>
         </div>
 
+        {/* Open URL directly toggle */}
+        <div className="flex items-center justify-between border-t border-dark-800 pt-6">
+          <div className="pr-4">
+            <div className="text-sm font-medium text-dark-200">
+              {t('admin.paymentMethods.openUrlDirect', 'Открывать страницу оплаты сразу')}
+            </div>
+            <div className="mt-0.5 text-xs text-dark-500">
+              {t(
+                'admin.paymentMethods.openUrlDirectHint',
+                'Без панели со ссылкой — провайдер открывается внутри MiniApp/вкладки сразу после клика. После оплаты юзер возвращается на /balance/result.',
+              )}
+            </div>
+          </div>
+          <button
+            onClick={() => setOpenUrlDirect(!openUrlDirect)}
+            className={`relative h-6 w-11 shrink-0 rounded-full transition-colors ${
+              openUrlDirect ? 'bg-accent-500' : 'bg-dark-600'
+            }`}
+            aria-label="Toggle open URL directly"
+          >
+            <span
+              className={`absolute top-1 h-4 w-4 rounded-full bg-white transition-transform ${
+                openUrlDirect ? 'left-6' : 'left-1'
+              }`}
+            />
+          </button>
+        </div>
+
         {/* Display name */}
         <div>
           <label className="mb-2 block text-sm font-medium text-dark-300">

src/pages/TopUpAmount.tsx

@@ -255,9 +255,8 @@ export default function TopUpAmount() {
     onSuccess: (data) => {
       const redirectUrl = data.payment_url || data.invoice_url;
       if (redirectUrl) {
-        setPaymentUrl(redirectUrl);
-
-        // Save payment info for the result page
+        // Save payment info for the result page (do BEFORE possible redirect,
+        // иначе после window.location.href этот код не выполнится).
         if (method && data.payment_id) {
           const methodKey = method.id.toLowerCase().replace(/-/g, '_');
           const displayName =
@@ -270,6 +269,22 @@ export default function TopUpAmount() {
             created_at: Date.now(),
           });
         }
+
+        // open_url_direct: seamless флоу как при покупке подарка.
+        // window.location.href внутри Telegram MiniApp WebView навигирует
+        // в том же контейнере без открытия внешнего браузера. После
+        // оплаты return_url возвращает на /balance/top-up/result.
+        //
+        // t.me/ URL (Telegram Stars, CryptoBot) — всегда через нативный
+        // handler (openInvoice / openTelegramLink в setPaymentUrl-ветке).
+        // Stars уже отбит раньше через starsPaymentMutation, здесь — защита
+        // на случай CryptoBot и других Telegram-deep-link провайдеров.
+        if (method?.open_url_direct && !redirectUrl.startsWith('https://t.me/')) {
+          window.location.href = redirectUrl;
+          return;
+        }
+
+        setPaymentUrl(redirectUrl);
       }
     },
     onError: (err: unknown) => {