test(ui): follow shared geometry panel gate

HANDOFF.md

@@ -9,18 +9,20 @@
   `YtCheckBox` markup; committed as `221b816`.
 - `PropertiesHierarchyTests` now checks shared styles and scopes the duplicate shape bindings to
   the Shape block; focused test passes. This task is ready to commit.
-- Clean app build is 0 warnings. Full suite: 10 failed / 512 passed of 522; remaining failures are
+- `GeometryFieldWidthTests` now identifies the shared draggable-layer Geometry block; focused test
+  passes. This task is ready to commit.
+- Clean app build is 0 warnings. Full suite: 9 failed / 513 passed of 522; remaining failures are
   being handled one task and one local commit at a time.
 
 ## Next action
 
-Commit the properties-hierarchy assertion update, then take the next remaining failure. Do not
+Commit the Geometry selector update, then take the next remaining failure. Do not
 push absent a milestone/checkpoint request.
 
 ## Landmines
 
 - Build/test with Windows `dotnet.exe`; the full suite can hang in WASAPI teardown.
-- `verify.sh` cannot pass until the remaining 10 suite failures are resolved; scope checks are run
+- `verify.sh` cannot pass until the remaining 9 suite failures are resolved; scope checks are run
   separately when that gate exits early.
 - Any integration test constructing `MainWindow` must set `LayoutPathOverride` to a temporary DB
   and clear it in `finally`.

ytLive.Tests/GeometryFieldWidthTests.cs

@@ -31,7 +31,7 @@ public class GeometryFieldWidthTests
 
         var geometry = doc.Descendants()
             .Where(e => e.Name.LocalName == "TextBlock" && (string?)e.Attribute("Text") == "Geometry")
-            .Single(e => ((string?)e.Parent?.Attribute("Visibility") ?? "").Contains("IsWebcamSelected"));
+            .Single(e => ((string?)e.Parent?.Attribute("Visibility") ?? "").Contains("SelectedElement.IsDraggable"));
 
         var rows = geometry.Parent!.Elements().Where(e => e.Name.LocalName == "DockPanel").ToList();
         Assert.Equal(2, rows.Count);