Presentation-only citation rail that keeps inline [n] markers and a side source list in sync — active-source highlight, expandable excerpts, copy link, open-source callback, keyboard nav, and rail / list / cards layouts. The app owns every source; the component never retrieves, verifies, or scores anything.
pnpm dlx shadcn@latest add "https://motiq.dev/r/source-citation-rail.json"