Plan step 38: every two-column layout moves onto <x-grid> with
<x-stack> columns, x-data landing on the grid itself; the small demo
picker reuses the showcase-w-sm class the Text fields section already
defines.
DatepickerTest's Chromium selectors run against isolated probe
fixtures, not this page, so nothing there is at risk.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9