Add documentation

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

@@ -307,11 +307,9 @@ 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

@@ -106,11 +106,9 @@ namespace UI.CardSystem.DragDrop
             base.OnDragEndedVisual();
             // Card-specific visual effects when dragging ends
         }
-
+        
-        protected override void OnDestroy()
+        private void OnDestroy()
         {
-            base.OnDestroy();
-            
             if (_cardDraggable != null)
             {
                 _cardDraggable.OnCardDataChanged -= HandleCardDataChanged;