test(ui): update OnDetachFromPanel test for new one-arg signature

OnDetachFromPanel no longer takes an Undo.UndoRedoCallback token -
after the focus-refresh refactor it unregisters from statically-known
handlers (OnUndoRedo, OnEditorFocusChanged) directly. Update the test
to call the method with just the event argument.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: JasonXuDeveloper - 傑 <jason@xgamedev.net>

Author: JasonXuDeveloper

UnityProject/Packages/com.jasonxudeveloper.jengine.ui/Tests/Editor/Internal/BootstrapEditorUITests.cs

@@ -773,8 +773,9 @@ public void OnDetachFromPanel_DoesNotThrow()
                 BindingFlags.NonPublic | BindingFlags.Static);
             Assert.IsNotNull(method, "OnDetachFromPanel method should exist");
 
-            Undo.UndoRedoCallback callback = () => { };
-            Assert.DoesNotThrow(() => method.Invoke(null, new object[] { null, callback }));
+            // Signature changed to take only the DetachFromPanelEvent (callbacks are now
+            // unregistered from statically-known handlers rather than via a user token).
+            Assert.DoesNotThrow(() => method.Invoke(null, new object[] { null }));
         }
 
         [Test]