Final 2 components of the rollout (words excluded per request). Both menu
siblings now source role/aria/data from the morfo via renderProps().
Audit total 213 → 158; both at 0 residual hits.
Unified the siblings' aria-boolean handling: aria-expanded/aria-checked
(morfo stateRef → aria-boolean string) resolve through renderProps, not a
soma boolean override. For checkbox/radio aria-checked the per-part
`checked` state source feeds the COMPUTED value — dropdown-menu's
effectiveChecked (group membership) and isChecked (value === group value)
— so renderProps emits the correct string. The migration agent had left
dropdown-menu's aria-checked as a boolean override reading effectiveChecked;
removing it without registering the state regressed a checked item to
aria-checked="false" — fixed by registering the computed source.
Tests assert the string aria-boolean shape.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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