fix: record transactions for free tariff switches and admin tariff changes

- Add transaction records for free tariff switches (downgrade, upgrade_cost=0) in miniapp and cabinet
- Add atomic transaction records for admin tariff changes in bot handler and cabinet API
- Use commit=False for admin flows to ensure subscription change and transaction are committed together

app/cabinet/routes/admin_users.py

@@ -1134,6 +1134,18 @@ async def update_user_subscription(
         if settings.RESET_TRAFFIC_ON_TARIFF_SWITCH:
             subscription.traffic_used_gb = 0.0
 
+        # Записываем транзакцию о смене тарифа
+        from app.database.crud.transaction import create_transaction
+
+        await create_transaction(
+            db=db,
+            user_id=user.id,
+            type=TransactionType.SUBSCRIPTION_PAYMENT,
+            amount_kopeks=0,
+            description=f"Смена тарифа администратором на '{tariff.name}'",
+            commit=False,
+        )
+
         await db.commit()
         await db.refresh(subscription)
 

app/cabinet/routes/subscription.py

@@ -4350,6 +4350,16 @@ async def switch_tariff(
             description=description,
             payment_method=PaymentMethod.BALANCE,
         )
+    else:
+        # Free switch (downgrade) — record in history
+        description = f"Переход на тариф '{new_tariff.name}'"
+        await create_transaction(
+            db=db,
+            user_id=user.id,
+            type=TransactionType.SUBSCRIPTION_PAYMENT,
+            amount_kopeks=0,
+            description=description,
+        )
 
     # Update subscription
     old_tariff_name = current_tariff.name if current_tariff else 'Unknown'

app/handlers/admin/users.py

@@ -5329,6 +5329,18 @@ async def confirm_admin_tariff_change(callback: types.CallbackQuery, db_user: Us
         if settings.RESET_TRAFFIC_ON_TARIFF_SWITCH:
             subscription.traffic_used_gb = 0.0
 
+        # Записываем транзакцию о смене тарифа
+        from app.database.crud.transaction import create_transaction
+
+        await create_transaction(
+            db=db,
+            user_id=user.id,
+            type=TransactionType.SUBSCRIPTION_PAYMENT,
+            amount_kopeks=0,
+            description=f"Смена тарифа администратором на '{tariff.name}'",
+            commit=False,
+        )
+
         await db.commit()
 
         # Синхронизируем с RemnaWave (сброс трафика по админ-настройке)

app/webapi/routes/miniapp.py

@@ -7061,6 +7061,16 @@ async def switch_tariff_endpoint(
             amount_kopeks=upgrade_cost,
             description=description,
         )
+    else:
+        # Бесплатный переход (downgrade) — записываем в историю
+        description = f"Переход на тариф '{new_tariff.name}'"
+        await create_transaction(
+            db=db,
+            user_id=user.id,
+            type=TransactionType.SUBSCRIPTION_PAYMENT,
+            amount_kopeks=0,
+            description=description,
+        )
 
     # Получаем список серверов из тарифа
     squads = new_tariff.allowed_squads or []