Workshop - Add --alt-login-callback startup argument

UI - Rounded corners on profile icons

src/Artemis.UI.Shared/Controls/ProfileConfigurationIcon.axaml.cs

@@ -6,7 +6,6 @@ using Avalonia.Controls;
 using Avalonia.Controls.Documents;
 using Avalonia.Layout;
 using Avalonia.LogicalTree;
-using Avalonia.Markup.Xaml;
 using Avalonia.Media;
 using Avalonia.Media.Imaging;
 using Avalonia.Threading;
@@ -43,7 +42,7 @@ public partial class ProfileConfigurationIcon : UserControl, IDisposable
             if (ConfigurationIcon.IconType == ProfileConfigurationIconType.MaterialIcon)
             {
                 Content = Enum.TryParse(ConfigurationIcon.IconName, true, out MaterialIconKind parsedIcon)
-                    ? new MaterialIcon {Kind = parsedIcon!}
+                    ? new MaterialIcon {Kind = parsedIcon}
                     : new MaterialIcon {Kind = MaterialIconKind.QuestionMark};
             }
             else if (ConfigurationIcon.IconBytes != null)
@@ -65,19 +64,28 @@ public partial class ProfileConfigurationIcon : UserControl, IDisposable
                 return;
 
             _stream = new MemoryStream(ConfigurationIcon.IconBytes);
-            if (!ConfigurationIcon.Fill)
+            Border border = new()
             {
-                Content = new Image {Source = new Bitmap(_stream)};
-                return;
+                CornerRadius = CornerRadius,
+                ClipToBounds = true,
+                VerticalAlignment = VerticalAlignment.Stretch,
+                HorizontalAlignment = HorizontalAlignment.Stretch
+                
+            };
+
+            if (ConfigurationIcon.Fill)
+            {
+                // Fill mode: use Foreground as Background and the bitmap as opacity mask
+                border.Background = TextElement.GetForeground(this);
+                border.OpacityMask = new ImageBrush(new Bitmap(_stream));
+            }
+            else
+            {
+                // Non-fill mode: place the image inside the rounded border
+                border.Child = new Image { Source = new Bitmap(_stream) };
             }
 
-            Content = new Border
-            {
-                Background = TextElement.GetForeground(this),
-                VerticalAlignment = VerticalAlignment.Stretch,
-                HorizontalAlignment = HorizontalAlignment.Stretch,
-                OpacityMask = new ImageBrush(new Bitmap(_stream))
-            };
+            Content = border;
         }
         catch (Exception)
         {