Real-time SMS consent status update on customer record

When kiosk consent is completed, the staff-facing customer Details page
now updates the SMS badge instantly via SignalR — no page refresh needed.
Added customerId to the NewInAppNotification SignalR payload so the
KioskConsent handler can match the current URL and swap the badge in place.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PowderCoating.Web/Services/InAppNotificationService.cs

@@ -72,6 +72,7 @@ public class InAppNotificationService : IInAppNotificationService
                 message = notification.Message,
                 link = notification.Link,
                 notificationType = notification.NotificationType,
+                customerId = notification.CustomerId,
                 createdAt = now.ToString("o")
             });
         }