Operator-approved 2026-09-23 ("fix it, one bigger thumbnail"), after his
report that sindra-nude-final looked "blurry until selected". c2b1454 sizes
thumbnails at 768 wide (the widest desktop tile, doubled for a 2x screen) and
caps them at 4096 tall. A browser test holds the number against the rendered
grid. c19d8c9 folds the heid bug-hunt (4/4 arms, five seat-executed probes):
cache hits must be regular files carrying the source's exact mtime, the cache
dirs never follow a link, the temp file is mkstemp, palette alpha and EXIF
orientation survive, and there is a 64 MP decode budget. 828 passed on the
branch; thumbs.toml 14/14.