fix(gift): cabinet GiftResult shows claim link for directed gifts + review fixes

Pairs with the backend cabinet-unification. Directed cabinet gifts now stay
PAID/claimable, so the buyer's GiftResult must show the share link for them too.

- GiftResult.tsx: render the share state (and stop polling) for ANY claimable
  paid gift via is_claimable, not just is_code_only.
- api/gift.ts: GiftPurchaseStatus gains is_claimable.
- GiftClaim.tsx: explicit failed/expired state (was falling into the 'almost
  ready' spinner forever).
- PurchaseSuccess.tsx: a paid gift is always claimable — stop polling and show
  the share block on `paid && is_gift` (don't gate on is_claimable, which could
  strand the buyer on a spinner).
- i18n: landing.giftClaim.failedTitle/failedDesc in ru/en/zh/fa.

src/api/gift.ts

@@ -74,6 +74,7 @@ export interface GiftPurchaseStatus {
   status: GiftPurchaseStatusValue;
   is_gift: boolean;
   is_code_only: boolean;
+  is_claimable: boolean;
   purchase_token: string | null;
   recipient_contact_value: string | null;
   gift_message: string | null;

src/locales/en.json

@@ -4850,7 +4850,9 @@
       "activateTelegram": "Activate in Telegram",
       "activateWeb": "Activate by email",
       "emailLabel": "Your email",
-      "claimNow": "Get my gift"
+      "claimNow": "Get my gift",
+      "failedTitle": "Gift unavailable",
+      "failedDesc": "The payment for this gift did not go through, so it cannot be activated."
     },
     "giftLink": {
       "shareText": "I have a gift for you! Activate it here:",

src/locales/fa.json

@@ -4510,7 +4510,9 @@
       "activateTelegram": "فعال‌سازی در تلگرام",
       "activateWeb": "فعال‌سازی با ایمیل",
       "emailLabel": "ایمیل شما",
-      "claimNow": "دریافت هدیه"
+      "claimNow": "دریافت هدیه",
+      "failedTitle": "هدیه در دسترس نیست",
+      "failedDesc": "پرداخت این هدیه انجام نشد، بنابراین قابل فعال‌سازی نیست."
     },
     "giftLink": {
       "shareText": "یک هدیه برای شما دارم! اینجا فعال کنید:",

src/locales/ru.json

@@ -5405,7 +5405,9 @@
       "activateTelegram": "Активировать в Telegram",
       "activateWeb": "Активировать по почте",
       "emailLabel": "Ваш email",
-      "claimNow": "Получить подарок"
+      "claimNow": "Получить подарок",
+      "failedTitle": "Подарок недоступен",
+      "failedDesc": "Оплата подарка не прошла, поэтому активировать его нельзя."
     },
     "giftLink": {
       "shareText": "Дарю вам подписку! Активируйте здесь:",

src/locales/zh.json

@@ -4509,7 +4509,9 @@
       "activateTelegram": "在 Telegram 中激活",
       "activateWeb": "通过邮箱激活",
       "emailLabel": "您的邮箱",
-      "claimNow": "领取礼物"
+      "claimNow": "领取礼物",
+      "failedTitle": "礼物不可用",
+      "failedDesc": "此礼物的付款未成功，无法激活。"
     },
     "giftLink": {
       "shareText": "我送您一份订阅！在此激活：",

src/pages/GiftClaim.tsx

@@ -142,6 +142,25 @@ export default function GiftClaim() {
     );
   }
 
+  // Payment failed/expired → tell the recipient instead of spinning forever
+  if (gift.status === 'failed' || gift.status === 'expired') {
+    return (
+      <Shell>
+        <div className="flex flex-col items-center gap-3 py-6 text-center">
+          <h1 className="text-lg font-semibold text-dark-50">
+            {t('landing.giftClaim.failedTitle', 'Gift unavailable')}
+          </h1>
+          <p className="text-sm text-dark-400">
+            {t(
+              'landing.giftClaim.failedDesc',
+              'The payment for this gift did not go through, so it cannot be activated.',
+            )}
+          </p>
+        </div>
+      </Shell>
+    );
+  }
+
   // Successful web claim → show connection link
   if (result) {
     return (

src/pages/GiftResult.tsx

@@ -476,8 +476,9 @@ export default function GiftResult() {
       const s = d?.status;
       if (s === 'delivered' || s === 'failed' || s === 'pending_activation' || s === 'expired')
         return false;
-      // Code-only gifts stay in 'paid' status — stop polling
-      if (s === 'paid' && d?.is_code_only) return false;
+      // Claimable gifts (code-only AND directed) stay in 'paid' until claimed —
+      // stop polling; the buyer shares the link.
+      if (s === 'paid' && d?.is_claimable) return false;
 
       // Check poll timeout
       if (Date.now() - pollStart.current > MAX_POLL_MS) {
@@ -511,8 +512,8 @@ export default function GiftResult() {
     );
   }
 
-  const isCodeOnlyPaid =
-    status?.status === 'paid' && status?.is_code_only && status?.purchase_token != null;
+  const isClaimablePaid =
+    status?.status === 'paid' && status?.is_claimable && status?.purchase_token != null;
   const isDelivered = status?.status === 'delivered';
   const isPendingActivation = status?.status === 'pending_activation';
   const isFailed = status?.status === 'failed' || status?.status === 'expired';
@@ -531,7 +532,7 @@ export default function GiftResult() {
       >
         {isError ? (
           <PollErrorState />
-        ) : isCodeOnlyPaid ? (
+        ) : isClaimablePaid ? (
           <CodeOnlySuccessState
             purchaseToken={status.purchase_token!}
             tariffName={status.tariff_name}

src/pages/PurchaseSuccess.tsx

@@ -695,10 +695,10 @@ export default function PurchaseSuccess() {
     refetchInterval: (query) => {
       const data = query.state.data;
       const currentStatus = data?.status;
-      // A gift that reached PAID is claimable and terminal for the BUYER (it
-      // stays PAID until the recipient claims) — stop polling and show the
-      // share link instead of spinning forever.
-      if (currentStatus === 'paid' && data?.is_gift && data?.is_claimable) return false;
+      // A gift that reached PAID is terminal for the BUYER (it stays PAID until
+      // the recipient claims) — stop polling and show the share link instead of
+      // spinning. A paid gift is always claimable, so don't gate on is_claimable.
+      if (currentStatus === 'paid' && data?.is_gift) return false;
       if (currentStatus === 'pending' || currentStatus === 'paid') {
         if (Date.now() - pollStart.current > MAX_POLL_MS) {
           setPollTimedOut(true);
@@ -766,10 +766,7 @@ export default function PurchaseSuccess() {
 
   // Deferred gift the buyer just paid for → show the transferable claim link to
   // forward (it stays PAID until the recipient claims it).
-  const isBuyerGiftLink =
-    purchaseStatus?.status === 'paid' &&
-    !!purchaseStatus?.is_gift &&
-    !!purchaseStatus?.is_claimable;
+  const isBuyerGiftLink = purchaseStatus?.status === 'paid' && !!purchaseStatus?.is_gift;
 
   // Gift pending activation → buyer sees "gift sent" message, not the activate button.
   // Recipient arrives via email link with ?activate=1 and sees the activate button instead.