fix(dock): fix build break and clean up logging/event patterns

src/Editor/Ghost.Editor/App.xaml.cs

@@ -72,7 +72,6 @@ public partial class App : Application
                 app._secondaryWindows.Remove(newWindow);
             }
             newWindow.Close();
-            Logger.LogError(ex);
             throw;
         }
     }

src/Editor/Ghost.Editor/View/Controls/DockLayout.cs

@@ -442,8 +442,14 @@ public sealed partial class DockLayout : Control
 
                     var result = TabTearOffService.TryTearOffTab(sourceNode.Items, args.Item, (tab) =>
                     {
+                        var handler = TabTornOff;
+                        if (handler == null)
+                        {
+                            throw new InvalidOperationException("No tear-off handler attached.");
+                        }
+
                         // Raise event to let the host handle window creation
-                        TabTornOff.Invoke(this, new TabTornOffEventArgs(tab, sourceNode));
+                        handler.Invoke(this, new TabTornOffEventArgs(tab, sourceNode));
                     }, sourceNode);
 
                     if (result.IsSuccess)

src/Editor/Ghost.Editor/View/Windows/EngineEditorWindow.xaml.cs

@@ -5,6 +5,7 @@ using Ghost.Editor.Core.Services;
 using Ghost.Editor.Core.Controls.Internal.Docking;
 using Ghost.Editor.View.Controls;
 using Ghost.Editor.ViewModels.Windows;
+using Microsoft.UI.Xaml;
 using Windows.ApplicationModel;
 using WinUIEx;