Plan step 38 (last batch): the app-bar/toolbar row becomes <x-stack>/
<x-row>, each bordered demo box a data-md-showcase-bar-frame hook
(`visible` for the search bar, whose docked suggestions must not clip;
`rounded` for the large-screen docked toolbar, which only gains its
edge and padding from `expanded`, 840px), and the search bar's own
avatar reuses the existing data-md-showcase-avatar hook. The
scrollable-tabs demo's forced-narrow box is
data-md-showcase-tabs-narrow, and the "Open the scaffold" link uses
the shared md-link/md-ink-primary classes in place of the old
Tailwind-era link/text-primary utilities.
Every #bars id and visible label/tooltip the Chromium BarsTest
(against its own probes) and the search index rely on is unchanged.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
