Shadow-DOM Lit element that renders the threads drawer: self-contained styles
with build-time token sync from react-core's theme, slot projection for custom
rows, license/upsell gating, filtering, and a mobile modal. View-state lives on
the element; domain state stays with the host. Multi-format build (ESM/CJS
externalize lit as a peer dep; UMD inlines lit so the CDN <script> path is
self-contained).
Benjamin Taylor