- Restore heading/list typography in the editor: MDXEditor relies on the
browser's default styles for <h1>/<ul> sizing, which Tailwind's Preflight
resets. Markdown shortcuts fired but the block looked unchanged. Style the
editor content explicitly, mirroring the rendered display.
- Keep pasted/typed URLs as plain text (linkPlugin disableAutoLink) so they
don't become `[url](url)`, which duplicated both the URL and its preview
card. Also dedupe extractUrls defensively so a repeated URL yields one card.
https://claude.ai/code/session_019DU6V5z6Nr4Vu7b1fBDnq4
Claude
273916d7a7