fix: Now the MCP can run in MacOS machines with node installed via homebrew

Author: Miguel Cartier

Editor/Utils/McpUtils.cs

@@ -386,13 +386,23 @@ public static void RunNpmCommand(string arguments, string workingDirectory)
  }
  else // macOS / Linux
  {
- // Fallback to /bin/bash to find 'npm' in PATH
- startInfo.FileName = "/bin/bash";
- startInfo.Arguments = $"-c \"npm {arguments}\"";
+ string userShell = Environment.GetEnvironmentVariable("SHELL") ?? "/bin/bash";
+ string shellName = Path.GetFileName(userShell);
+ 
+ // Source rc file to init version managers (nvm, fnm, volta) - GUI apps don't inherit shell env
+ string rcFile = shellName == "zsh" ? ".zshrc" : ".bashrc";
+ 
+ startInfo.FileName = userShell;
+ startInfo.Arguments = $"-c \"source ~/{rcFile} 2>/dev/null || true; npm {arguments}\"";
 
- // Ensure PATH includes common npm locations and current PATH
+ // Fallback PATH for common npm locations
  string currentPath = Environment.GetEnvironmentVariable("PATH") ?? string.Empty;
- string extraPaths = "/usr/local/bin:/opt/homebrew/bin";
+ string homeDir = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
+ string extraPaths = string.Join(":",
+ "/usr/local/bin",
+ "/opt/homebrew/bin",
+ $"{homeDir}/.nvm/versions/node/default/bin" // nvm default alias
+ );
  startInfo.EnvironmentVariables["PATH"] = $"{extraPaths}:{currentPath}";
  }