CheckboxTokens' icon size is 18px, the same as the box it fills; the tick
and the dash were 16. Every icon these components draw at 20px or under —
the tick, the switch's check and cross, the chip's leading, trailing,
remove and filter-check icons, the date picker's menu arrows and the sort
arrow — now asks for the optical size 20 cut, which is drawn for that
size rather than scaled down from 24.
Plan step 20, finding IN-12 (and core C16's optical sizes).
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
