A container marked data-wrn-roving owns its [data-wrn-roving-item]
descendants: one carries tabindex=0 so Tab reaches the group once, and the
arrow keys move within it, with Home/End, wrap-around and skip-disabled.
Written once here rather than five times across Tabs, Nav, MegaMenu, Sidebar
and Stepper, and because focus bookkeeping cannot live in component state --
a client function writing after it returns has that write dropped.
Item visibility is checked via hidden and data-show rather than measured
size: the test DOM reports every element as zero-sized, which is exactly what
left the dialog focus trap uncovered.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
ClintchizandClaude Opus 5
f94004648d