- Allow .mp4/.webm in addition to image types; raise upload limit to 64MB
- MP4 uploads are luma-keyed to a VP9+alpha WebM plus an animated WebP
fallback via lib/ghost-media.js; the raw MP4 is discarded
- Pre-made .webm uploads are stored directly
- All prior media (image/webm/webp) is cleaned up on replace and on delete
- WebP doubles as the still thumbnail for converted ghosts
jessikitty