升级XR插件版本

Packages/MCPForUnity/Editor/Helpers/UnityJsonSerializer.cs

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+using System.Collections.Generic;
+using Newtonsoft.Json;
+using MCPForUnity.Runtime.Serialization;
+
+namespace MCPForUnity.Editor.Helpers
+{
+    /// <summary>
+    /// Shared JsonSerializer with Unity type converters.
+    /// Extracted from ManageGameObject to eliminate cross-tool dependencies.
+    /// </summary>
+    public static class UnityJsonSerializer
+    {
+        /// <summary>
+        /// Shared JsonSerializer instance with converters for Unity types.
+        /// Use this for all JToken-to-Unity-type conversions.
+        /// </summary>
+        public static readonly JsonSerializer Instance = JsonSerializer.Create(new JsonSerializerSettings
+        {
+            Converters = new List<JsonConverter>
+            {
+                new Vector2Converter(),
+                new Vector3Converter(),
+                new Vector4Converter(),
+                new QuaternionConverter(),
+                new ColorConverter(),
+                new RectConverter(),
+                new BoundsConverter(),
+                new UnityEngineObjectConverter()
+            }
+        });
+    }
+}
+