Five missing line-height values caused pixel shifts when Tailwind
utilities (text-sm, text-lg, text-xs) were replaced with semantic
classes that only set font-size. Also remove phantom padding-bottom
on .admin-header (the old pb-4 utility was never defined).
Fixes: .admin-header, .admin-header-subtitle, .admin-error,
.admin-brand, .admin-text-secondary
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
867a69109e