feat: add gift purchase UI states for telegram recipients

- Add recipient_in_bot and bot_link fields to PurchaseStatus API type
- Show bot link instruction when gift recipient is not in bot
- Show "gift sent via Telegram" message when recipient is in bot
- Fix duplicate text rendering in GiftPendingActivationState
- Handle recipientInBot=null edge case safely
- Add gift notification translations for ru, en, zh, fa locales

src/locales/en.json

@@ -4060,6 +4060,11 @@
     "giftSentSuccess": "Gift sent!",
     "giftSentDesc": "Recipient will be notified by email",
     "giftPendingActivationDesc": "The recipient already has an active subscription. They will receive a link to activate the gift.",
+    "giftTelegramSent": "Gift notification sent to recipient via Telegram",
+    "giftTelegramNotInBot": "Recipient hasn't started the bot yet. Send them this link:",
+    "giftTelegramPendingSent": "Activation request sent to recipient via Telegram",
+    "giftTelegramPendingNotInBot": "Recipient hasn't started the bot yet. Send them the bot link so they can activate the gift:",
+    "openBot": "Open bot",
     "autoLoginFailed": "Auto-login failed",
     "autoLoginProcessing": "Signing in...",
     "discount": {