fix: block wheel spin without active subscription

- Add has_subscription to WheelConfig type
- Disable spin button when user has no subscription
- Add noSubscription guard in handleUnifiedSpin handler
- Show warning banner directing user to activate subscription
- Prevent banner stacking (noSubscription takes priority over daily limit)
- Add noSubscription i18n keys for ru, en, zh, fa

src/locales/en.json

@@ -858,7 +858,8 @@
       "cannotSpin": "Cannot spin right now",
       "insufficientBalance": "Insufficient balance",
       "topUpRequired": "Top up your balance to pay for spin",
-      "starsNotAvailable": "Stars payment not available. Open the app via Telegram."
+      "starsNotAvailable": "Stars payment not available. Open the app via Telegram.",
+      "noSubscription": "An active subscription is required to spin the wheel. Activate your subscription first."
     },
     "payWithStars": "Pay with Stars",
     "payWithDays": "Pay with days",

src/locales/fa.json

@@ -694,7 +694,8 @@
       "cannotSpin": "فعلاً امکان چرخش نیست",
       "insufficientBalance": "موجودی کافی نیست",
       "topUpRequired": "برای پرداخت شارژ کنید",
-      "starsNotAvailable": "پرداخت Stars در دسترس نیست. برنامه را از طریق تلگرام باز کنید."
+      "starsNotAvailable": "پرداخت Stars در دسترس نیست. برنامه را از طریق تلگرام باز کنید.",
+      "noSubscription": "برای چرخاندن گردونه نیاز به اشتراک فعال دارید. ابتدا اشتراک خود را فعال کنید."
     },
     "payWithStars": "پرداخت {stars} Stars",
     "processingPayment": "در حال پردازش...",

src/locales/ru.json

@@ -887,7 +887,8 @@
       "cannotSpin": "Сейчас нельзя крутить",
       "insufficientBalance": "Недостаточно средств на балансе",
       "topUpRequired": "Пополните баланс для оплаты спина",
-      "starsNotAvailable": "Оплата Stars недоступна. Откройте приложение через Telegram."
+      "starsNotAvailable": "Оплата Stars недоступна. Откройте приложение через Telegram.",
+      "noSubscription": "Для вращения колеса необходима активная подписка. Активируйте подписку в разделе «Подписка»."
     },
     "payWithStars": "Оплатить Stars",
     "payWithDays": "Оплатить днями",

src/locales/zh.json

@@ -698,7 +698,8 @@
       "cannotSpin": "当前无法抽奖",
       "insufficientBalance": "余额不足",
       "topUpRequired": "请充值以支付抽奖费用",
-      "starsNotAvailable": "Stars支付不可用。请通过Telegram打开应用。"
+      "starsNotAvailable": "Stars支付不可用。请通过Telegram打开应用。",
+      "noSubscription": "需要有效订阅才能转动轮盘。请先激活订阅。"
     },
     "payWithStars": "支付 {stars} Stars",
     "processingPayment": "处理中...",