add warning ai status, fix ai availability handling 1

Azaion.Annotator/Annotator.xaml

@@ -496,6 +496,7 @@
 
             <Button
                 x:Name="AIDetectBtn"
+                IsEnabled="False"
                 Grid.Column="10"
                 Padding="2" Width="25"
                 Height="25"

Azaion.Annotator/AnnotatorEventHandler.cs

@@ -483,5 +483,7 @@ public class AnnotatorEventHandler(
             mainWindow.AIDetectBtn.IsEnabled = e.Status == AIAvailabilityEnum.Enabled;
             mainWindow.StatusHelp.Text = e.ToString();
         });
+1        if (e.Status is AIAvailabilityEnum.Enabled or AIAvailabilityEnum.Error)
+            await inferenceService.CheckAIAvailabilityTokenSource.CancelAsync();
     }
 }