Tablets report a desktop UA, so between 768px and ~1366px the flat
link row rendered and wrapped inside its links; no single breakpoint
fits six locales. use-nav-overflow.js measures the row against the
space beside the brand and actions and collapses to the hamburger
when it doesn't fit. The row stays rendered (invisible, inert) so it
remains measurable. DocsSearch switches to its icon below xl by CSS so
the action group's width never depends on the collapse state.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
