Library thumbs were locked to 4:3 with object-fit: cover, so portrait
photos got their top and bottom crop-fitted off. Switching to 1:1
cells with object-fit: contain — full photo always visible, grid still
uniform, portrait and landscape both get symmetric letterbox bars.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
