message: Fix console error in `clean-conversation-headers`
diff: @@ -27,14 +27,15 @@ async function initIssue(): Promise<void> {
  }
  async function initPR(): Promise<void> {
  - const byline = await elementReady('.gh-header-meta .flex-auto:not(.rgh-clean-conversation-header)');
  - if (!byline) {
  + const author = await elementReady('.gh-header-meta .flex-auto:not(.rgh-clean-conversation-header) .author');
  + if (!author) {
  return;
  }
  + const byline = author.closest<HTMLElement>('.flex-auto')!;
  +
  byline.classList.add('rgh-clean-conversation-header');
  - const author = select('.author', byline)!;
  const isSameAuthor = pageDetect.isPRConversation() && author.textContent === (await elementReady('.TimelineItem .author'))!.textContent;
  const [base, headBranch] = select.all('.commit-ref', byline)!;
  