SaveLoad using managed lifecycle

Assets/Scripts/UI/CardSystem/BoosterOpeningPage.cs

@@ -1,4 +1,4 @@
-using System.Collections;
+using System.Collections;
 using System.Collections.Generic;
 using AppleHills.Data.CardSystem;
 using Core;
@@ -52,7 +52,6 @@ namespace UI.CardSystem
 
         private void Awake()
         {
-            _cardManager = CardSystemManager.Instance;
             _cardAlbumUI = FindFirstObjectByType<CardAlbumUI>();
             
             // Set up button listeners
@@ -86,6 +85,14 @@ namespace UI.CardSystem
             HideAllCardBacks();
         }
         
+        protected override void OnManagedAwake()
+        {
+            base.OnManagedAwake();
+            
+            // Safe to access manager instance here
+            _cardManager = CardSystemManager.Instance;
+        }
+        
         /// <summary>
         /// Cache all card back buttons from the container
         /// </summary>