3df31d0c7a
Upstreams ScadaBridge's local .rail-scroll pane. ScrollNav (default false) wraps Nav in .rail-scroll and adds side-rail-scroll; layout.css (lg+ only) fills the rail and scrolls just the pane so .rail-foot stays pinned. Default markup/CSS unchanged for other consumers. Stays at 0.5.2, unpublished. Claude-Session: https://claude.ai/code/session_01GT67AEHd2Acv1YPwGfXEoV