chore(unity): 固定Unity CLI Loop本地包并移除UnitySkills依赖

Client/Packages/io.github.hatayama.uloopmcp/Editor/CLI/CliInstaller.cs

@@ -0,0 +1,99 @@
+using System.Diagnostics;
+using System.Text;
+using System.Threading.Tasks;
+
+using UnityEngine;
+
+namespace io.github.hatayama.uLoopMCP
+{
+    public static class CliInstaller
+    {
+        /// <summary>
+        /// Windows: npm global prefix often points to admin-only directories (e.g. C:\Program Files\nodejs).
+        /// Non-Windows: always returns true.
+        /// </summary>
+        public static bool CheckWindowsPermissions(
+            string npmPath,
+            string installTarget,
+            out string globalPrefix,
+            out string manualCommand)
+        {
+            UnityEngine.Debug.Assert(!string.IsNullOrEmpty(npmPath), "npmPath must not be null or empty");
+            UnityEngine.Debug.Assert(!string.IsNullOrEmpty(installTarget), "installTarget must not be null or empty");
+
+            globalPrefix = null;
+            manualCommand = null;
+
+            if (Application.platform != RuntimePlatform.WindowsEditor)
+            {
+                return true;
+            }
+
+            globalPrefix = NpmInstallDiagnostics.GetGlobalPrefix(npmPath);
+            if (string.IsNullOrEmpty(globalPrefix) || NpmInstallDiagnostics.IsGlobalPrefixWritable(globalPrefix))
+            {
+                return true;
+            }
+
+            manualCommand = $"npm install -g {installTarget}";
+            return false;
+        }
+
+        public static async Task<CliInstallResult> InstallAsync(string npmPath, string installTarget, string nodePath)
+        {
+            UnityEngine.Debug.Assert(!string.IsNullOrEmpty(npmPath), "npmPath must not be null or empty");
+            UnityEngine.Debug.Assert(!string.IsNullOrEmpty(installTarget), "installTarget must not be null or empty");
+            ProcessStartInfo startInfo = new ProcessStartInfo
+            {
+                FileName = npmPath,
+                Arguments = $"install -g {installTarget}",
+                UseShellExecute = false,
+                RedirectStandardOutput = true,
+                RedirectStandardError = true,
+                CreateNoWindow = true
+            };
+
+            if (!string.IsNullOrEmpty(nodePath))
+            {
+                NodeEnvironmentResolver.SetupEnvironmentPath(startInfo, nodePath);
+            }
+
+            bool success = false;
+            string errorOutput = "";
+
+            await Task.Run(() =>
+            {
+                Process process = ProcessStartHelper.TryStart(startInfo);
+                if (process == null)
+                {
+                    errorOutput = "Failed to start npm process";
+                    return;
+                }
+
+                StringBuilder errorBuilder = new StringBuilder();
+                process.OutputDataReceived += (s, e) => { };
+                process.ErrorDataReceived += (s, e) => { if (e.Data != null) errorBuilder.AppendLine(e.Data); };
+                process.BeginOutputReadLine();
+                process.BeginErrorReadLine();
+
+                if (!process.WaitForExit(CliConstants.NPM_INSTALL_TIMEOUT_MS))
+                {
+                    if (!process.HasExited) process.Kill();
+                    process.Dispose();
+                    errorOutput = $"Installation timed out after {CliConstants.NPM_INSTALL_TIMEOUT_MS / 1000} seconds";
+                    return;
+                }
+
+                // Parameterless WaitForExit flushes async output buffers
+                process.WaitForExit();
+                errorOutput = errorBuilder.ToString();
+                success = process.ExitCode == 0;
+                process.Dispose();
+            });
+
+            CliInstallationDetector.InvalidateCache();
+
+            return new CliInstallResult(success, errorOutput);
+        }
+    }
+}