<x-menu> renders data-md-menu with data-md-sheet-at-compact, and its
popover data-md-menu-popover with data-md-position and data-md-vibrant;
menu.css caps a long menu at 288px so it scrolls instead of running
off the top layer (ACT-04) and ties the open/close transition to the
trigger's corner (ACT-26), restyles a submenu to open in place inside
a sheet-at-compact sheet, and still carries the dropdown a select's
picker and a searchable choices field draw, so select.css and
choices.css finish their step-36 TODO import. actions.css sheds the
state-transition-fast and popover-transition utilities menu-item and
menu no longer use; state-transition-default and [data-fab-menu]
stay for fab-menu's own rewrite.
data-menu, data-menu-filter, data-menu-sheet, data-menu-empty,
data-sheet-at-compact, data-vibrant and data-active are renamed to
data-md-*, also in menu.js, split-button.css (which renders a
<x-menu> and now imports its stylesheet) and AppBarTest's overflow
menu (plan step 36, actions).
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
Plan step 36. <x-split-button> renders data-md-split-button and
data-md-size on the pair and data-md-split on its halves. split-button.css
draws SplitButton*Tokens' shape — full outer corners, inner corners that
grow under the finger, the trailing half round while its menu is open —
the narrower leading padding and 48px trailing half at xs and sm, and the
chevron's own size, nudge and turn on the standard scheme. groups.css is
empty and leaves tailwind.css.
The actions browser test follows data-md-split and data-md-button-group,
and gains the owed tests for a connected segment's 48px edge and a
button group's single-required and multi selection.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
