商店除发放和货币扣除，其余部分完毕。加入药水icon免费包

Assets/mailSystem/mailSlotPrefab.cs

@@ -3,6 +3,9 @@ using UnityEngine.UI;
 
 public class mailSlotPrefab : MonoBehaviour
 {
+    [Header("buttons")]
+    public Button openButton;
+    public Button receivedButton;
     [Header("basic infomations")]
     public Image mailImage;
     public Text mailTitle;
@@ -11,4 +14,6 @@ public class mailSlotPrefab : MonoBehaviour
     [Header("dots")]
     public Image isRead_redDot;
     public Image hasGift_icon;
+    [Header("select")]
+    public Image selectedImage;
 }