Function showAwaitingAction

example/tests/gm_download_test.js:421–428

* Register an in-flight action button on the awaiting bar. * Use to expose things like "🛑 Abort download" while we wait for a verdict. * The button auto-hides when the verdict resolves (or the next showAwaiting() is called). * @param {string} label Button text. * @param {() => void} onC

(label, onClick)

   * @param {() => void} onClick  Click handler. Stays attached until the bar hides.
   */
  function showAwaitingAction(label, onClick) {
    $awaitingAction.textContent = label;
    $awaitingAction.style.display = "";
    $awaitingAction.onclick = (ev) => {
      ev.preventDefault();
      try { onClick(); } catch (e) { console.error("awaiting action handler threw:", e); }
    };
  }


  // ---------- GM_download wrappers ----------