upd: sync local changes

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/Base/Lists/ModWidget.cs

@@ -0,0 +1,38 @@
+using Godot;
+
+using Cthangover.Core.UI;
+
+namespace Cthangover.Mods.Interface.Base.Lists
+{
+    /// <summary>
+    /// Lightweight alternative to Widget for mod-authored controls. Has a simpler
+    /// lifecycle — just Construct() on first access and Destruct() on tree exit —
+    /// without the visibility interception and Show/Hide pipeline that Widget
+    /// carries. Use when the heavy Widget state machine would be overkill or
+    /// when the control's visibility is managed by Godot's native system.
+    /// </summary>
+    public abstract partial class ModWidget : Control, IUiLazyConstruct
+    {
+        private bool _constructed;
+
+        /// <summary>Idempotent construction gate: calls <see cref="Construct"/> exactly once, on the first invocation. Thread-safe for repeated external calls.</summary>
+        public void EnsureConstructed()
+        {
+            if (_constructed)
+                return;
+            _constructed = true;
+            
+            Construct();
+        }
+
+        /// <summary>Runs <see cref="Destruct"/> once when the constructed control leaves the tree.</summary>
+        public override void _ExitTree()
+        {
+            if (_constructed)
+                Destruct();
+        }
+        
+        protected abstract void Construct();
+        protected virtual void Destruct() { }
+    }
+}