pop/storyboard: bare-token scores parse correctly (weight optional)
storyboard.mjs's regex required *N on every score token, so mary.np
(bare lyrics with weight only on the final held syllable) collapsed
to a single slide instead of one-per-syllable. Made weight optional
(defaults to 1 beat) to match folk_backing.py's parser. mary now
generates 117 slides cleanly across all 4 verses + chick-chick-boom.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>