data-animation-delay is stored as a plain seconds string (e.g. '2'); the reveal
script assigned it raw to el.style.animationDelay, which is invalid CSS and no-ops.
Suffix 's' onto bare numbers (leaving '2s'/'200ms' alone) so entrance-animation
delays actually apply. Backend generateCompiledHTML gets the byte-identical change.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>