Original-file link modes break when an item is renamed in Eagle #4

// Called from the Markdown post-processor and from observeRenderedImages()
// (outside the cross-platform guard, so it runs for every user).
private resolveEagleImage(img: HTMLImageElement): void {
  const src = img.getAttribute('src');
  if (!src || img.dataset.eagleResolvedSrc === src) return;
  const path = extractPathFromImageSrc(src);
  const match = path?.match(/^(.*[\\/]images[\\/][^\\/]+\.info)[\\/][^\\/]+$/);
  if (path && match) void this.applyEagleImage(img, src, path, match[1]);
}

private async applyEagleImage(img: HTMLImageElement, src: string, path: string, dir: string) {
  let meta: { name?: string; ext?: string; isDeleted?: boolean };
  try {
    meta = JSON.parse(await fsp.readFile(`${dir}/metadata.json`, 'utf8'));
  } catch { return; }
  if (!meta.name || meta.isDeleted) return;

  let file = `${meta.name}.${meta.ext}`;
  try {
    await fsp.access(`${dir}/${file}`);
  } catch {
    const files = (await fsp.readdir(dir).catch(() => []))
      .filter(f => f !== 'metadata.json' && !f.endsWith('_thumbnail.png'));
    if (!files.length) return;
    file = files[0];
  }
  if (img.getAttribute('src') !== src) return; // replaced meanwhile

  const current = `${dir}/${file}`;
  if (current.normalize('NFC') !== path.normalize('NFC')) {
    img.setAttribute('src', pathToResourceUrl(current, Platform.resourcePathPrefix));
  }
  img.dataset.eagleResolvedSrc = img.getAttribute('src') ?? '';
  img.setAttribute('alt', meta.name);
}