升级XR插件版本

Packages/MCPForUnity/Editor/Services/PlatformService.cs

@@ -0,0 +1,31 @@
+using System;
+
+namespace MCPForUnity.Editor.Services
+{
+    /// <summary>
+    /// Default implementation of platform detection service
+    /// </summary>
+    public class PlatformService : IPlatformService
+    {
+        /// <summary>
+        /// Checks if the current platform is Windows
+        /// </summary>
+        /// <returns>True if running on Windows</returns>
+        public bool IsWindows()
+        {
+            return Environment.OSVersion.Platform == PlatformID.Win32NT;
+        }
+
+        /// <summary>
+        /// Gets the SystemRoot environment variable (Windows-specific)
+        /// </summary>
+        /// <returns>SystemRoot path, or "C:\\Windows" as fallback on Windows, null on other platforms</returns>
+        public string GetSystemRoot()
+        {
+            if (!IsWindows())
+                return null;
+
+            return Environment.GetEnvironmentVariable("SystemRoot") ?? "C:\\Windows";
+        }
+    }
+}