Add, do not transcode
Every layer of the original survives
Texel reads the original HEIC resource through PhotoKit. The primary image is never routed through UIImage or re-encoded. HDR, EXIF, Styles, thumbnails, and the gain map stay in place.
- SHA-256 check on every primary-image item
- Read-back confirms the result is still HEIC
- The original asset is never modified