Add documentation

Assets/Scripts/UI/CardSystem/DragDrop/BoosterPackVisual.cs

@@ -308,10 +308,8 @@ namespace UI.CardSystem.DragDrop
         
         #endregion
         
-        protected override void OnDestroy()
+        private void OnDestroy()
         {
-            base.OnDestroy();
-            
             if (_boosterDraggable != null)
             {
                 _boosterDraggable.OnBoosterOpened -= HandleBoosterOpened;

Assets/Scripts/UI/CardSystem/DragDrop/CardDraggableVisual.cs

@@ -107,10 +107,8 @@ namespace UI.CardSystem.DragDrop
             // Card-specific visual effects when dragging ends
         }
         
-        protected override void OnDestroy()
+        private void OnDestroy()
         {
-            base.OnDestroy();
-            
             if (_cardDraggable != null)
             {
                 _cardDraggable.OnCardDataChanged -= HandleCardDataChanged;