fix: linting

scientific_surfing/subscription_manager.py

@@ -26,8 +26,8 @@ class SubscriptionManager:
         subscription = self.subscriptions_data.add_subscription(name, url)
 
         if self.storage.save_subscriptions(self.subscriptions_data):
-            self.refresh_subscription(name)
-            self.activate_subscription(name)
+            self.refresh_subscription(subscription.name)
+            self.activate_subscription(subscription.name)
             print(f"✅ Added subscription: {name} -> {url}")
         else:
             print("❌ Failed to save subscription")