v1.08 — Custom Fluent confirmation dialog, replace all MessageBox

- New ConfirmDialog overlay with dark backdrop, rounded card, shadow
- Warning/Question/Error icon types with accent colors
- Replaced all MessageBox.Show calls (RemovePage, PreInstallCheck, Troubleshoot)
- Click outside dialog = cancel

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Pages/RemovePage.xaml.cs

@@ -51,11 +51,12 @@ namespace InstaSoftOfficeTool.Pages
 
         private async void BtnRemove_Click(object sender, RoutedEventArgs e)
         {
-            var result = MessageBox.Show(
+            bool confirmed = await _main.ConfirmAsync(
+                "Office elt\u00e1vol\u00edt\u00e1s",
                 "Biztosan el szeretn\u00e9 t\u00e1vol\u00edtani a kiv\u00e1lasztott Office telep\u00edt\u00e9seket?",
-                "Meger\u0151s\u00edt\u00e9s", MessageBoxButton.YesNo, MessageBoxImage.Warning);
+                "Elt\u00e1vol\u00edt\u00e1s", "M\u00e9gse");
 
-            if (result != MessageBoxResult.Yes) return;
+            if (!confirmed) return;
 
             BtnRemove.IsEnabled = false;
             LogPanel.Visibility = Visibility.Visible;