iOS Safari auto-zooms when a focused input has font-size < 16px. Bump
text-entry controls to 16px under (hover: none) and (pointer: coarse) so
desktop sizing is untouched. Date/time inputs and selects are excluded —
they open native pickers and never zoom.
Doc-editor tiers keep their size hierarchy: Large lands at 18px (above the
16px threshold) instead of collapsing onto Medium, and the email rich-body
Large (17px) is left alone since it was already zoom-safe. All three editor
layers (textarea, highlight overlay, line numbers) move together so the
syntax overlay stays metrically aligned.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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