fix(dock): fix build breaks, handle size reordering, and add size change subscriptions

src/Editor/Ghost.Editor.Core/Controls/Internal/Docking/DockGroupNode.cs

@@ -42,27 +42,45 @@ public partial class DockGroupNode : DockNode
     private void OnChildrenChanged(object? sender, NotifyCollectionChangedEventArgs e)
     {
         // Maintain Sizes collection to match Children
-        if (e.Action == NotifyCollectionChangedAction.Add && e.NewItems != null)
+        switch (e.Action)
+        {
+            case NotifyCollectionChangedAction.Add:
+                if (e.NewItems != null)
                 {
                     for (int i = 0; i < e.NewItems.Count; i++)
                     {
                         Sizes.Insert(e.NewStartingIndex + i, new Microsoft.UI.Xaml.GridLength(1, Microsoft.UI.Xaml.GridUnitType.Star));
                     }
                 }
-        else if (e.Action == NotifyCollectionChangedAction.Remove && e.OldItems != null)
+                break;
+            case NotifyCollectionChangedAction.Remove:
+                if (e.OldItems != null)
                 {
                     for (int i = 0; i < e.OldItems.Count; i++)
                     {
                         Sizes.RemoveAt(e.OldStartingIndex);
                     }
                 }
-        else if (e.Action == NotifyCollectionChangedAction.Reset)
+                break;
+            case NotifyCollectionChangedAction.Move:
+                Sizes.Move(e.OldStartingIndex, e.NewStartingIndex);
+                break;
+            case NotifyCollectionChangedAction.Replace:
+                if (e.NewItems != null)
                 {
+                    for (int i = 0; i < e.NewItems.Count; i++)
+                    {
+                        Sizes[e.NewStartingIndex + i] = new Microsoft.UI.Xaml.GridLength(1, Microsoft.UI.Xaml.GridUnitType.Star);
+                    }
+                }
+                break;
+            case NotifyCollectionChangedAction.Reset:
                 Sizes.Clear();
                 foreach (var _ in _children)
                 {
                     Sizes.Add(new Microsoft.UI.Xaml.GridLength(1, Microsoft.UI.Xaml.GridUnitType.Star));
                 }
+                break;
         }
     }
 

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

@@ -2,7 +2,6 @@ using Ghost.Editor.Core.Controls.Internal.Docking;
 using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
 using Microsoft.UI.Xaml.Data;
-using System.Diagnostics;
 
 namespace Ghost.Editor.View.Controls;
 

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

@@ -19,6 +19,7 @@ public sealed partial class DockLayout
         if (node is DockGroupNode groupNode)
         {
             ((INotifyCollectionChanged)groupNode.Children).CollectionChanged += OnChildrenCollectionChanged;
+            groupNode.Sizes.CollectionChanged += OnSizesCollectionChanged;
             foreach (var child in groupNode.Children)
             {
                 SubscribeToNode(child);
@@ -38,6 +39,7 @@ public sealed partial class DockLayout
         if (node is DockGroupNode groupNode)
         {
             ((INotifyCollectionChanged)groupNode.Children).CollectionChanged -= OnChildrenCollectionChanged;
+            groupNode.Sizes.CollectionChanged -= OnSizesCollectionChanged;
             foreach (var child in groupNode.Children)
             {
                 UnsubscribeFromNode(child);
@@ -55,11 +57,17 @@ public sealed partial class DockLayout
             if (node is DockGroupNode groupNode)
             {
                 ((INotifyCollectionChanged)groupNode.Children).CollectionChanged -= OnChildrenCollectionChanged;
+                groupNode.Sizes.CollectionChanged -= OnSizesCollectionChanged;
             }
         }
         _subscribedNodes.Clear();
     }
 
+    private void OnSizesCollectionChanged(object? sender, NotifyCollectionChangedEventArgs e)
+    {
+        RenderTree();
+    }
+
     private void OnNodePropertyChanged(object? sender, System.ComponentModel.PropertyChangedEventArgs e)
     {
         // Filter to structural property names

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

@@ -1,11 +1,6 @@
-using System.Collections.Specialized;
-using System.ComponentModel;
-using System.Diagnostics;
-using Ghost.Core;
 using Ghost.Editor.Core.Controls.Internal.Docking;
 using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
-using Microsoft.UI.Xaml.Data;
 
 namespace Ghost.Editor.View.Controls;
 

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

@@ -4,8 +4,10 @@ using Ghost.Editor.Core.Contracts;
 using Ghost.Editor.Core.Services;
 using Ghost.Editor.Core.Controls.Internal.Docking;
 using Ghost.Editor.View.Controls;
+using Ghost.Editor.View.Pages.EngineEditor;
 using Ghost.Editor.ViewModels.Windows;
 using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Controls;
 using Windows.ApplicationModel;
 using WinUIEx;