fix: handle nullable traffic_limit_gb and end_date in subscription model

Add None-safety guards to Subscription model properties (is_active,
is_expired, should_be_expired, actual_status, days_left,
traffic_used_percent) and pricing handler comparisons to prevent
TypeError when nullable columns contain None values.

app/database/models.py

@@ -1159,17 +1159,25 @@ class Subscription(Base):
     @property
     def is_active(self) -> bool:
         current_time = datetime.utcnow()
-        return self.status == SubscriptionStatus.ACTIVE.value and self.end_date > current_time
+        return (
+            self.status == SubscriptionStatus.ACTIVE.value
+            and self.end_date is not None
+            and self.end_date > current_time
+        )
 
     @property
     def is_expired(self) -> bool:
         """Проверяет, истёк ли срок подписки"""
-        return self.end_date <= datetime.utcnow()
+        return self.end_date is not None and self.end_date <= datetime.utcnow()
 
     @property
     def should_be_expired(self) -> bool:
         current_time = datetime.utcnow()
-        return self.status == SubscriptionStatus.ACTIVE.value and self.end_date <= current_time
+        return (
+            self.status == SubscriptionStatus.ACTIVE.value
+            and self.end_date is not None
+            and self.end_date <= current_time
+        )
 
     @property
     def actual_status(self) -> str:
@@ -1182,12 +1190,12 @@ class Subscription(Base):
             return 'disabled'
 
         if self.status == SubscriptionStatus.ACTIVE.value:
-            if self.end_date <= current_time:
+            if self.end_date is None or self.end_date <= current_time:
                 return 'expired'
             return 'active'
 
         if self.status == SubscriptionStatus.TRIAL.value:
-            if self.end_date <= current_time:
+            if self.end_date is None or self.end_date <= current_time:
                 return 'expired'
             return 'trial'
 
@@ -1230,6 +1238,8 @@ class Subscription(Base):
 
     @property
     def days_left(self) -> int:
+        if self.end_date is None:
+            return 0
         current_time = datetime.utcnow()
         if self.end_date <= current_time:
             return 0
@@ -1255,11 +1265,10 @@ class Subscription(Base):
 
     @property
     def traffic_used_percent(self) -> float:
-        if self.traffic_limit_gb == 0:
+        if not self.traffic_limit_gb:
             return 0.0
-        if self.traffic_limit_gb > 0:
-            return min((self.traffic_used_gb / self.traffic_limit_gb) * 100, 100.0)
-        return 0.0
+        used = self.traffic_used_gb or 0.0
+        return min((used / self.traffic_limit_gb) * 100, 100.0)
 
     def extend_subscription(self, days: int):
         if self.end_date > datetime.utcnow():

app/handlers/subscription/pricing.py

@@ -404,15 +404,16 @@ async def get_subscription_info_text(subscription, texts, db_user, db: AsyncSess
             status_text = '⌛ Истекла'
         type_text = 'Платная подписка'
 
-    if subscription.traffic_limit_gb == 0:
+    traffic_limit = subscription.traffic_limit_gb or 0
+    if traffic_limit == 0:
         if settings.is_traffic_fixed():
             traffic_text = '∞ Безлимитный'
         else:
             traffic_text = '∞ Безлимитный'
     elif settings.is_traffic_fixed():
-        traffic_text = f'{subscription.traffic_limit_gb} ГБ'
+        traffic_text = f'{traffic_limit} ГБ'
     else:
-        traffic_text = f'{subscription.traffic_limit_gb} ГБ'
+        traffic_text = f'{traffic_limit} ГБ'
 
     subscription_cost = await get_subscription_cost(subscription, db)
 
@@ -444,7 +445,7 @@ async def get_subscription_info_text(subscription, texts, db_user, db: AsyncSess
         info_text += f'\n💰 <b>Стоимость подписки в месяц:</b> {texts.format_price(subscription_cost)}'
 
     # Отображаем докупленный трафик
-    if subscription.traffic_limit_gb > 0:  # Только для лимитированных тарифов
+    if (subscription.traffic_limit_gb or 0) > 0:  # Только для лимитированных тарифов
         from datetime import datetime
 
         from sqlalchemy import select as sql_select