기존 시스템 재사용 프로토타입 보존

Assets/Scripts/NetworkConnectionHandler.cs

@@ -17,6 +17,8 @@ namespace Northbound
         
         private Dictionary<ulong, int> _clientSpawnIndices = new Dictionary<ulong, int>();
         private int _nextSpawnIndex = 0;
+        private NetworkManager _networkManager;
+        private bool _callbacksRegistered;
 
         // ⭐ Awake에서 스폰 포인트 먼저 찾고, 콜백 등록
         private void Awake()
@@ -28,15 +30,25 @@ namespace Northbound
             }
 
             // 2️⃣ 그 다음 콜백 등록
-            if (NetworkManager.Singleton != null)
-            {
-                NetworkManager.Singleton.ConnectionApprovalCallback = ApprovalCheck;
-                NetworkManager.Singleton.OnServerStarted += OnServerStarted;
-                NetworkManager.Singleton.OnClientConnectedCallback += OnClientConnected;
-            }
-            else
-            {
-            }
+            RegisterCallbacks();
+        }
+
+        private void Start()
+        {
+            RegisterCallbacks();
+        }
+
+        private void RegisterCallbacks()
+        {
+            if (_callbacksRegistered) return;
+            _networkManager = GetComponent<NetworkManager>();
+            if (_networkManager == null) _networkManager = NetworkManager.Singleton;
+            if (_networkManager == null) return;
+
+            _networkManager.ConnectionApprovalCallback = ApprovalCheck;
+            _networkManager.OnServerStarted += OnServerStarted;
+            _networkManager.OnClientConnectedCallback += OnClientConnected;
+            _callbacksRegistered = true;
         }
 
         private void FindSpawnPoints()
@@ -192,11 +204,11 @@ namespace Northbound
 
         private void OnDestroy()
         {
-            if (NetworkManager.Singleton != null)
+            if (_callbacksRegistered && _networkManager != null)
             {
-                NetworkManager.Singleton.ConnectionApprovalCallback = null;
-                NetworkManager.Singleton.OnServerStarted -= OnServerStarted;
-                NetworkManager.Singleton.OnClientConnectedCallback -= OnClientConnected;
+                _networkManager.ConnectionApprovalCallback = null;
+                _networkManager.OnServerStarted -= OnServerStarted;
+                _networkManager.OnClientConnectedCallback -= OnClientConnected;
             }
         }
     }