## Summary

Please explain the goal of this change in 2–3 lines.

## Changes

- [ ]

## Screenshots / Demo (if UI/behavior changes)

- [ ] Added GIF/screenshot
- [ ] Shareable repro link from https://markstream-vue.simonhe.me/test (recommended)

## Checklist

- [ ] Lint: `pnpm lint`
- [ ] Typecheck: `pnpm typecheck`
- [ ] Tests: `pnpm test` (or `pnpm test:update` if snapshots changed)
- [ ] Build: `pnpm build` (library + CSS)