setupPopupListeners function

function setupPopupListeners(): void {
  if (!rulePopupElement) return;

  rulePopupElement
    .querySelector("#fa-rp-save")!
    .addEventListener("mousedown", (e) => {
      e.preventDefault();
      void saveFieldRule();
    });

  rulePopupElement
    .querySelector("#fa-rp-cancel")!
    .addEventListener("mousedown", (e) => {
      e.preventDefault();
      hideRulePopup();
      currentOnDismiss?.();
    });

  rulePopupElement
    .querySelector("#fa-rp-fixed")
    ?.addEventListener("input", () => {
      updatePreview();
    });

  rulePopupElement
    .querySelector("#fa-rp-preview-refresh")
    ?.addEventListener("mousedown", (e) => {
      e.preventDefault();
      updatePreview();
    });

  document.addEventListener("keydown", handlePopupKeyDown);
}