feat: Add support for thumbnail inclusion in AI processing and enhance UI bindings

imagecatalog/AvaloniaMainWindow.axaml.cs

@@ -1,5 +1,7 @@
+using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Interactivity;
+using Avalonia.Layout;
 using Avalonia.Platform.Storage;
 using Avalonia.Styling;
 using Avalonia.Threading;
@@ -135,6 +137,11 @@ public partial class AvaloniaMainWindow : Window
         {
             // Color is set by typing hex directly in the TextBox.
         };
+
+        _model.ShowMessageRequested += async (_, args) =>
+        {
+            await ShowMessageDialogAsync(args.Item1, args.Item2);
+        };
     }
 
     private bool _isStoppingFaceEncoderForClose;
@@ -182,4 +189,48 @@ public partial class AvaloniaMainWindow : Window
     {
         _ = this.FindControl<Avalonia.Controls.Button>("ThemeToggleButton");
     }
+
+    private async Task ShowMessageDialogAsync(string title, string message)
+    {
+        var dialog = new Window
+        {
+            Title = title,
+            Width = 480,
+            CanResize = false,
+            WindowStartupLocation = WindowStartupLocation.CenterOwner,
+            SizeToContent = SizeToContent.Height
+        };
+
+        dialog.Content = BuildMessageDialogContent(message, () => dialog.Close());
+
+        await dialog.ShowDialog(this);
+    }
+
+    private static Control BuildMessageDialogContent(string message, Action closeDialog)
+    {
+        var layout = new StackPanel
+        {
+            Margin = new Thickness(16),
+            Spacing = 12
+        };
+
+        layout.Children.Add(new TextBlock
+        {
+            Text = message,
+            TextWrapping = Avalonia.Media.TextWrapping.Wrap,
+            MaxWidth = 420
+        });
+
+        var closeButton = new Button
+        {
+            Content = "OK",
+            MinWidth = 88,
+            HorizontalAlignment = HorizontalAlignment.Right
+        };
+
+        closeButton.Click += (_, _) => closeDialog();
+
+        layout.Children.Add(closeButton);
+        return layout;
+    }
 }