Fix initialization order for the manager objects

Assets/Scripts/Core/GameManager.cs

@@ -5,6 +5,7 @@ using System.Collections.Generic;
 using AppleHills.Core.Interfaces;
 using Core;
 using UI;
+using Bootstrap;
 
 /// <summary>
 /// Singleton manager for global game state and settings. Provides accessors for various gameplay parameters.
@@ -70,10 +71,18 @@ public class GameManager : MonoBehaviour
         InitializeSettings();
         InitializeDeveloperSettings();
         
+        // Register for post-boot initialization
+        BootCompletionService.RegisterInitAction(InitializePostBoot);
+        
         // DontDestroyOnLoad(gameObject);
     }
     
     private void Start()
+    {
+        // PauseMenu subscription moved to InitializePostBoot
+    }
+    
+    private void InitializePostBoot()
     {
         // Find and subscribe to PauseMenu events
         PauseMenu pauseMenu = PauseMenu.Instance;