* feat(@shadcn/react): add message-scroller package
Add the @shadcn/react headless primitives package with MessageScroller
scroll anchoring, streaming follow, history prepend, and jump-to-message
behavior. Includes geometry helpers, use-render utility, and unit,
browser, and perf tests.
* feat(registry): add chat components
Add MessageScroller, Message, Bubble, Attachment, and Marker registry
sources for base and radix, style variants, preview-03 chat blocks,
and registry index wiring.
* feat(v4): integrate chat components into docs site
Wire chat components into the v4 app with docs routes, example preview
pages, message part renderers, markdown support, registry build updates,
and supporting lib utilities.
* feat(examples): add chat component demos
Add base and radix example demos for MessageScroller, Message, Bubble,
Attachment, Marker, scroll-fade, and shimmer.
* docs: add chat component documentation
Add component and utility docs for the chat component set, update docs
navigation, and add the June 2026 chat components changelog entry.
* chore: regenerate registry JSON output
Rebuild public registry artifacts for all style variants with the new
chat components.
* chore(release): add @shadcn/react publish and CI pipeline
Add Changesets prerelease workflow, browser test job, RELEASING docs,
and monorepo wiring for publishing @shadcn/react independently from
the shadcn CLI.
* docs: fix display of component preview on mobile
* fix
* fix
* docs: add message scroller docs
* style: format
* fix
