folds draws a glyph at 16-24 px; on a phone the 16/18/20 px ones read small in their buttons. One global
rule per folds Icon size scales the glyph (22/24/24/26/28 px) at paint time inside an IconButton, so no
button, PhoneHit area or row changes size and desktop is untouched. phoneGlyph.test.ts pins the folds
class names, the px range and that the rule is a phone-only scale.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>