NavRail
Collapsible side navigation — shared between agent threads and object lists.
Layout & shell · fixture-only
Agent thread rail
NavRailItem per thread with active state and icon — loading/empty/error via NavRail state prop.
Workshop: /chat left rail, mobile thread drawer.
Fixture data only — behaviour matches production chrome
Object module nav
NavRail lists registry modules — one active item, compact link density.
Workshop: AppSidebar module list when object explorer is primary.
Fixture data only — behaviour matches production chrome