技能主要更新，修复卡顿并加入动画，以及各种其他更新。

Assets/songsDatabase/loadDlcListPrefab.cs

@@ -1,5 +1,6 @@
 using UnityEngine;
 using UnityEngine.UI;
+using System.Collections;
 using System.Collections.Generic;
 
 public class loadDlcListPrefab : MonoBehaviour
@@ -106,14 +107,27 @@ public class loadDlcListPrefab : MonoBehaviour
         var rt = dlc_scContent.GetComponent<RectTransform>();
         if (rt != null) UnityEngine.UI.LayoutRebuilder.ForceRebuildLayoutImmediate(rt);
 
-        // After all buttons are instantiated, have each dlcButton resolve its dlcData (deferred lookup)
         var allButtons = dlc_scContent.GetComponentsInChildren<dlcButton>(true);
-        foreach (var b in allButtons)
+        StartCoroutine(ResolveAndRestore(allButtons));
+    }
+
+    private IEnumerator ResolveAndRestore(dlcButton[] allButtons)
+    {
+        if (allButtons != null)
         {
-            if (b != null)
-                b.ResolveDlcData();
+            for (int i = 0; i < allButtons.Length; i++)
+            {
+                var b = allButtons[i];
+                if (b != null)
+                {
+                    yield return b.ResolveDlcDataAsync();
+                }
+            }
         }
 
+        // Let layout and any fades settle for a frame
+        yield return null;
+
         // Restore last selected DLC button from PlayerPrefs and simulate a click on it
         int savedIndex = PlayerPrefs.GetInt("dlc_selected_index", 0);
         if (allButtons != null && allButtons.Length > 0)
@@ -138,4 +152,5 @@ public class loadDlcListPrefab : MonoBehaviour
             Debug.LogWarning("loadDlcListPrefab: no dlc buttons found after RefreshUI");
         }
     }
+
 }