Add POST /api/export {projectIds}: one folder per project (named after it),
photos named <lastname-firstname>.<ext>, with a generated initials SVG for
Members without a Slack photo. Dedupe image fetches, bounded concurrency, fflate
zip. Factor data.ts so routes + export share one fixtures/live gating path.
Frontend: Export-photos button downloads the zip.
Vite + Vue 3 + DaisyUI SPA (project picker + Slack avatar member grid) with a
TypeScript/Node (Hono) backend proxying Napta + Slack, SQLite avatar cache via
node:sqlite, and docker-compose for Coolify deploy.
