/**
 * Load an external script, hiding AMD define to avoid conflicts with Monaco's RequireJS.
 */
export function loadScript(src) {
  return new Promise((resolve, reject) => {
    if (document.querySelector(`script[src="${src}"]`)) { resolve(); return; }
    const savedDefine = window.define;
    window.define = undefined;
    const s = document.createElement('script');
    s.src = src;
    s.onload = () => { window.define = savedDefine; resolve(); };
    s.onerror = () => { window.define = savedDefine; reject(new Error(`Failed to load ${src}`)); };
    document.head.appendChild(s);
  });
}