Code up the card part

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

@@ -0,0 +1,62 @@
+using AppleHills.Data.CardSystem;
+using UI.DragAndDrop.Core;
+using UnityEngine;
+
+namespace UI.CardSystem.DragDrop
+{
+    /// <summary>
+    /// Card-specific implementation of DraggableObject.
+    /// Manages card data and card-specific drag behavior.
+    /// </summary>
+    public class CardDraggable : DraggableObject
+    {
+        [Header("Card Data")]
+        [SerializeField] private CardData cardData;
+        
+        // Events
+        public event System.Action<CardDraggable, CardData> OnCardDataChanged;
+        
+        public CardData CardData => cardData;
+        
+        /// <summary>
+        /// Set the card data for this draggable card
+        /// </summary>
+        public void SetCardData(CardData data)
+        {
+            cardData = data;
+            OnCardDataChanged?.Invoke(this, cardData);
+            
+            // Update visual if it exists
+            if (_visualInstance != null && _visualInstance is CardDraggableVisual cardVisual)
+            {
+                cardVisual.RefreshCardDisplay();
+            }
+        }
+        
+        protected override void OnDragStartedHook()
+        {
+            base.OnDragStartedHook();
+            // Card-specific drag started behavior
+        }
+        
+        protected override void OnDragEndedHook()
+        {
+            base.OnDragEndedHook();
+            // Card-specific drag ended behavior
+        }
+        
+        protected override void OnSelectionChangedHook(bool selected)
+        {
+            base.OnSelectionChangedHook(selected);
+            // Card-specific selection behavior
+        }
+        
+        protected override void OnSlotChangedHook(DraggableSlot previousSlot, DraggableSlot newSlot)
+        {
+            base.OnSlotChangedHook(previousSlot, newSlot);
+            // Card-specific slot changed behavior
+            // Could trigger events for card collection reordering, etc.
+        }
+    }
+}
+