const MD_IMG = /!\[[^\]]*\]\((\/images\/[^)\s]+)\)/g
const HTML_IMG = /<img[^>]+src=["'](\/images\/[^"']+)["']/g

export function scanImageRefs(source: string): string[] {
  const set = new Set<string>()
  for (const m of source.matchAll(MD_IMG)) set.add(m[1])
  for (const m of source.matchAll(HTML_IMG)) set.add(m[1])
  return [...set]
}