TASK 7 UI polish batch: scene/source row cleanup, dedup naming, full social handles — scenes are now pure selection rows (edit/trash/visibility icons and inline rename removed with EditSceneCommand/RemoveSceneCommand/ToggleSceneVisibilityCommand + Scene.IsEditing); source rows gained the trio (new EditElementCommand → inline rename via SceneElement.IsEditing, ToggleElementVisibilityCommand → eye flips IsVisible, open/slashed style rebound, hidden rows dim to 45%); duplicate resource names get a no-space incrementing suffix via shared NextSourceName (Image, Image2, Image3…) derived from actual names so deletions never collide (AddSource + AddReusedImage); social bar renders the full validated handle (MaxWidth=200 + TextTrimming removed from SocialBarRenderer and the preview template); side panels stay fixed 220/300; focus-loss capture lag documented in ai.md as a known OS limit (deferred) — the two real-App tests now share RealAppHost, a dedicated STA thread owning the single WPF App, instead of each calling new App(); new SourceNamingTests integration test (Text/Text2/Text3, delete-middle re-add no-collision) — 170 tests passing, 0 warnings

MainWindow.xaml.cs

@@ -63,7 +63,7 @@ public partial class MainWindow : Window
             : null;
     }
 
-    private void SceneNameBox_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
+    private void SourceNameBox_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
     {
         if (sender is TextBox { IsVisible: true } box)
         {
@@ -372,24 +372,24 @@ public partial class MainWindow : Window
         return null;
     }
 
-    private void SceneNameBox_KeyDown(object sender, KeyEventArgs e)
+    private void SourceNameBox_KeyDown(object sender, KeyEventArgs e)
     {
         if (e.Key is Key.Enter or Key.Escape)
         {
-            CommitSceneEdit(sender);
+            CommitSourceEdit(sender);
             e.Handled = true;
         }
     }
 
-    private void SceneNameBox_LostFocus(object sender, RoutedEventArgs e)
+    private void SourceNameBox_LostFocus(object sender, RoutedEventArgs e)
     {
-        CommitSceneEdit(sender);
+        CommitSourceEdit(sender);
     }
 
-    private static void CommitSceneEdit(object sender)
+    private static void CommitSourceEdit(object sender)
     {
-        if (sender is FrameworkElement { DataContext: Scene scene })
-            scene.IsEditing = false;
+        if (sender is FrameworkElement { DataContext: SceneElement element })
+            element.IsEditing = false;
     }
 
     // ─── List drag-to-reorder (scenes list + sources list) ───