fix: enforce UTF-8 encoding without BOM when writing files to disk

Author: msanatan

UnityMcpBridge/Editor/Helpers/PortManager.cs

@@ -206,10 +206,10 @@ private static void SavePort(int port)
                 string registryFile = GetRegistryFilePath();
                 string json = JsonConvert.SerializeObject(portConfig, Formatting.Indented);
                 // Write to hashed, project-scoped file
-                File.WriteAllText(registryFile, json);
+                File.WriteAllText(registryFile, json, new System.Text.UTF8Encoding(false));
                 // Also write to legacy stable filename to avoid hash/case drift across reloads
                 string legacy = Path.Combine(GetRegistryDirectory(), RegistryFileName);
-                File.WriteAllText(legacy, json);
+                File.WriteAllText(legacy, json, new System.Text.UTF8Encoding(false));
 
                 if (IsDebugEnabled()) Debug.Log($"<b><color=#2EA3FF>MCP-FOR-UNITY</color></b>: Saved port {port} to storage");
             }

UnityMcpBridge/Editor/MCPForUnityBridge.cs

@@ -719,7 +719,7 @@ private static void WriteHeartbeat(bool reloading, string reason = null)
                     project_path = Application.dataPath,
                     last_heartbeat = DateTime.UtcNow.ToString("O")
                 };
-                File.WriteAllText(filePath, JsonConvert.SerializeObject(payload));
+                File.WriteAllText(filePath, JsonConvert.SerializeObject(payload), new System.Text.UTF8Encoding(false));
             }
             catch (Exception)
             {

UnityMcpBridge/Editor/Tools/ManageScript.cs

@@ -217,7 +217,7 @@ string namespaceName
 
             try
             {
-                File.WriteAllText(fullPath, contents);
+                File.WriteAllText(fullPath, contents, new System.Text.UTF8Encoding(false));
                 AssetDatabase.ImportAsset(relativePath);
                 AssetDatabase.Refresh(); // Ensure Unity recognizes the new script
                 return Response.Success(
@@ -298,7 +298,7 @@ string contents
 
             try
             {
-                File.WriteAllText(fullPath, contents);
+                File.WriteAllText(fullPath, contents, new System.Text.UTF8Encoding(false));
                 AssetDatabase.ImportAsset(relativePath); // Re-import to reflect changes
                 AssetDatabase.Refresh();
                 return Response.Success(

UnityMcpBridge/Editor/Tools/ManageShader.cs

@@ -171,7 +171,7 @@ string contents
 
             try
             {
-                File.WriteAllText(fullPath, contents);
+                File.WriteAllText(fullPath, contents, new System.Text.UTF8Encoding(false));
                 AssetDatabase.ImportAsset(relativePath);
                 AssetDatabase.Refresh(); // Ensure Unity recognizes the new shader
                 return Response.Success(
@@ -239,7 +239,7 @@ string contents
 
             try
             {
-                File.WriteAllText(fullPath, contents);
+                File.WriteAllText(fullPath, contents, new System.Text.UTF8Encoding(false));
                 AssetDatabase.ImportAsset(relativePath);
                 AssetDatabase.Refresh();
                 return Response.Success(