Function parseReleaseNotes

export function parseReleaseNotes(body: string | undefined): ReleaseSection[] {
  if (!body) return [];

  const sections: ReleaseSection[] = [];
  let current: ReleaseSection | undefined;

  for (const rawLine of body.split(/\r?\n/)) {
    const line = rawLine.trim();
    // GitHub appends this to generated notes; it's noise in the modal.
    if (/^\*{0,2}Full Changelog\*{0,2}\s*:/i.test(line)) continue;

    const heading = /^#{2,4}\s+(.*\S)\s*$/.exec(line);
    if (heading) {
      current = { title: stripMarkdown(heading[1]), items: [] };
      sections.push(current);
      continue;
    }

    const bullet = /^[-*+]\s+(.*)$/.exec(line);
    if (bullet) {
      const item = stripMarkdown(bullet[1]);
      if (!item) continue;
      current ??= { items: [] };
      if (sections.at(-1) !== current) sections.push(current);
      if (current.items.length < MAX_NOTE_ITEMS_PER_SECTION) {
        current.items.push(item.slice(0, MAX_NOTE_ITEM_LENGTH));
      }
      continue;
    }

    // A wrapped continuation of the previous bullet.
    const items = current?.items;
    if (line && items && items.length > 0) {
      const merged = `${items[items.length - 1]} ${stripMarkdown(line)}`.trim();
      items[items.length - 1] = merged.slice(0, MAX_NOTE_ITEM_LENGTH);
    }
  }

  return sections.filter((section) => section.items.length > 0).slice(0, MAX_NOTE_SECTIONS);
}
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