fix(subscription): process zero-day one-star payment

bot.py

@@ -494,22 +494,7 @@ async def subscribe_command(message: Message, state: FSMContext) -> None:
 
 async def _send_zero_star_invoice(message: Message, user_id: int) -> None:
     """Sends a one-Star test invoice; never grants access."""
-    try:
-        await message.bot.send_invoice(
-            chat_id=message.chat.id,
-            title="Тестовый счёт на 1 ⭐",
-            description="Проверка поддержки минимального платежа Telegram Stars",
-            payload=f"sub:0:{datetime.datetime.now(datetime.timezone.utc):%Y%m%d%H%M%S}",
-            currency="XTR",
-            prices=[LabeledPrice(label="Тест", amount=1)],
-            provider_token="",
-            message_thread_id=message.message_thread_id,
-        )
-    except Exception as exc:
-        logger.info("Zero-Star invoice rejected by Telegram (%s)", type(exc).__name__)
-        await message.answer("Telegram отклонил тестовый счёт на 1 ⭐.")
-        return
-    await message.answer("Telegram принял тестовый счёт на 1 ⭐. Доступ он не выдаёт.")
+    await _send_subscription_invoice(message, user_id, days=0)
 
 
 async def _send_subscription_invoice(message: Message, user_id: int, days: int = 30) -> None:
@@ -554,9 +539,6 @@ async def subscription_plan(callback: CallbackQuery, state: FSMContext) -> None:
         await callback.answer("Такой тариф недоступен.", show_alert=True)
         return
     await callback.answer()
-    if days == 0:
-        await _send_zero_star_invoice(callback.message, callback.from_user.id)
-        return
     try:
         await callback.message.delete()
     except Exception as exc: