navigate to schedule items after creating new schedule (#118)

ErsatzTV/Pages/ScheduleEditor.razor

@@ -76,17 +76,21 @@
         _messageStore.Clear();
         if (_editContext.Validate())
         {
-            Seq<BaseError> errorMessage = IsEdit ?
-                (await Mediator.Send(_model.ToUpdate())).LeftToSeq() :
-                (await Mediator.Send(_model.ToCreate())).LeftToSeq();
+            Either<BaseError, ProgramScheduleViewModel> result = IsEdit ?
+                await Mediator.Send(_model.ToUpdate()) :
+                await Mediator.Send(_model.ToCreate());
 
-            errorMessage.HeadOrNone().Match(
+            result.Match(
+                programSchedule =>
+                {
+                    string destination = IsEdit ? "/schedules" : $"/schedules/{programSchedule.Id}/items";
+                    NavigationManager.NavigateTo(destination);
+                },
                 error =>
                 {
                     Snackbar.Add(error.Value, Severity.Error);
                     Logger.LogError("Unexpected error saving schedule: {Error}", error.Value);
-                },
-                () => NavigationManager.NavigateTo("/schedules"));
+                });
         }
     }