ExamplesLayout

Shell — nested navigation

Collapsible groups and pathname-based active states.

Nested navigation

`DashboardSidebarNav` marks items active from the current pathname (including nested segments).

Active route highlighting follows `usePathname()`.

Define DashboardNavGroup[] with label, optional icon, defaultOpen, and items (title, href, icon).

Shell — mobile sheet

Sidebar becomes a sheet below the md breakpoint.

Shell — settings layout

Secondary navigation inside the main column.