feat: Implement AI CSV overwrite confirmation and update CSV output path based on destination

imagecatalog/AvaloniaMainWindow.axaml.cs

@@ -41,6 +41,7 @@ public partial class AvaloniaMainWindow : Window
 
         // Let DataModel marshal callbacks onto Avalonia UI thread.
         _model.UiInvoker = action => Dispatcher.UIThread.Invoke(action);
+        _model.ConfirmAiCsvOverwriteAsync = ShowConfirmationDialogAsync;
 
         _model.SelectSourceFolderRequested += async (_, _) =>
         {
@@ -283,6 +284,25 @@ public partial class AvaloniaMainWindow : Window
         await dialog.ShowDialog(this);
     }
 
+    private async Task<bool> ShowConfirmationDialogAsync(string title, string message)
+    {
+        var dialog = new Window
+        {
+            Title = title,
+            Width = 520,
+            CanResize = false,
+            WindowStartupLocation = WindowStartupLocation.CenterOwner,
+            SizeToContent = SizeToContent.Height
+        };
+
+        dialog.Content = BuildConfirmationDialogContent(
+            message,
+            () => dialog.Close(true),
+            () => dialog.Close(false));
+
+        return await dialog.ShowDialog<bool>(this);
+    }
+
     private static Control BuildMessageDialogContent(string message, Action closeDialog)
     {
         var layout = new StackPanel
@@ -310,4 +330,46 @@ public partial class AvaloniaMainWindow : Window
         layout.Children.Add(closeButton);
         return layout;
     }
+
+    private static Control BuildConfirmationDialogContent(string message, Action confirmDialog, Action cancelDialog)
+    {
+        var layout = new StackPanel
+        {
+            Margin = new Thickness(16),
+            Spacing = 12
+        };
+
+        layout.Children.Add(new TextBlock
+        {
+            Text = message,
+            TextWrapping = Avalonia.Media.TextWrapping.Wrap,
+            MaxWidth = 460
+        });
+
+        var buttons = new StackPanel
+        {
+            Orientation = Orientation.Horizontal,
+            HorizontalAlignment = HorizontalAlignment.Right,
+            Spacing = 8
+        };
+
+        var cancelButton = new Button
+        {
+            Content = "Annulla",
+            MinWidth = 96
+        };
+        cancelButton.Click += (_, _) => cancelDialog();
+
+        var confirmButton = new Button
+        {
+            Content = "Sovrascrivi",
+            MinWidth = 96
+        };
+        confirmButton.Click += (_, _) => confirmDialog();
+
+        buttons.Children.Add(cancelButton);
+        buttons.Children.Add(confirmButton);
+        layout.Children.Add(buttons);
+        return layout;
+    }
 }