Buttons, inputs, selects, pickers, toggles and tabs all declared 34 while
IconButton and the PageHeader action sat at 32, so anything mixing them
in a row was 2px out of alignment.
Everything now reads CONTROL_HEIGHT (32) from constants, so the number
lives in one place instead of nine.
Two content-box fixes were needed to make 32 safe, both measured in the
browser rather than assumed:
- MUI's button line-height is 1.75 - 22.75px at our 13px base - which
with 6px padding needs 34.75px. It was already over its own box at 34
and would have clipped at 32. Now 1.2, which leaves headroom for the
taller scripts we ship (ar, th, vi, ja, zh).
- MUI pads the inner input 8.5px top and bottom, so an input's content
needed 35.7px inside a 32px shell and was being cut off by
overflow:hidden. Padding is zeroed in the theme for both the input and
the Select's div, which centres instead.
Verified in the DOM: button, select and input all render at exactly 32
with scrollHeight equal to height, so nothing is clipped.
Claude-Session: https://claude.ai/code/session_01AbYLvwpEaZFXktHVcqrFRd
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