네트워크 멀티플레이 대응

Assets/Scripts/SmartAutoHost.cs

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+using UnityEngine;
+using Unity.Netcode;
+
+public class SmartAutoHost : MonoBehaviour
+{
+#if UNITY_EDITOR
+    private void Start()
+    {
+        if (NetworkManager.Singleton == null)
+        {
+            Debug.LogError("[SmartAutoHost] NetworkManager not found!");
+            return;
+        }
+
+        if (NetworkManager.Singleton.IsServer || NetworkManager.Singleton.IsClient)
+        {
+            return;
+        }
+
+        bool isMainEditor = IsMainEditor();
+
+        if (isMainEditor)
+        {
+            NetworkManager.Singleton.StartHost();
+            Debug.Log("<color=yellow><b>[SmartAutoHost]</b> MAIN EDITOR → Starting as HOST</color>");
+        }
+        else
+        {
+            NetworkManager.Singleton.StartClient();
+            Debug.Log("<color=blue><b>[SmartAutoHost]</b> SECONDARY EDITOR → Connecting as CLIENT</color>");
+        }
+    }
+
+    private bool IsMainEditor()
+    {
+        string[] args = System.Environment.GetCommandLineArgs();
+        return System.Array.Exists(args, arg => arg == "-mainEditor");
+    }
+#else
+    private void Start()
+    {
+        // 빌드된 버전은 항상 클라이언트
+        if (NetworkManager.Singleton != null && 
+            !NetworkManager.Singleton.IsServer && 
+            !NetworkManager.Singleton.IsClient)
+        {
+            NetworkManager.Singleton.StartClient();
+            Debug.Log("<color=blue>[SmartAutoHost] Build → Connecting as CLIENT</color>");
+        }
+    }
+#endif
+}