diff --git a/src/TeamsISO.App/MainWindow.xaml b/src/TeamsISO.App/MainWindow.xaml
index 64d8634..d589741 100644
--- a/src/TeamsISO.App/MainWindow.xaml
+++ b/src/TeamsISO.App/MainWindow.xaml
@@ -53,12 +53,15 @@
                 BorderThickness="0,0,1,0">
             <DockPanel LastChildFill="False">
 
-                <!-- Wild Dragon mark — real logo from wilddragon.net. Clickable: opens About. -->
+                <!-- Wild Dragon mark — real logo from wilddragon.net. Clickable: opens About.
+                     Lives inside the chromeless title bar's drag region, so we opt into
+                     hit-testing so clicks land on the button rather than starting a drag. -->
                 <Button DockPanel.Dock="Top"
                         Style="{StaticResource Wd.Button.RailIcon}"
                         Width="48" Height="56"
                         Margin="0,12,0,4"
                         Click="OnAboutClick"
+                        shell:WindowChrome.IsHitTestVisibleInChrome="True"
                         ToolTip="About TeamsISO">
                     <StackPanel>
                         <Image Source="/Assets/dragon-mark.png"