Plan step 22, actions.md § Missing (Grouped menu layout by gap): M3
Expressive's "Grouped" layout separates clusters with a gap rather than a
divider, and `<x-menu-group>` only had the labelled form.
`<x-menu-group gap>` holds its items in a box 2px apart
(SegmentedMenuTokens.SegmentedGap) whose ends round like a list's, and
stands 8px off its neighbours — the same 8px the separator keeps around
its line. `label` is now optional, so a cluster can be a gap alone. The
header says when to reach for which: the divider first, and always in a
menu long enough to scroll, where M3 says gaps are unsupported.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
