- docs: add CHANGELOG Unreleased/Added entry for editable image captions
- test: export sanitizeCaption and add vitest unit coverage
(whitespace collapse, trim, 500-char boundary)
- refactor: drop duplicate .imageCaption CSS module class, keep the
global .image-caption as the single source
- docs: fix turndown image-caption comment (video rule emits a markdown
link, not a <div>)
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
dc14a9a540