c37a425276
Zooming an image now shows ‹ / › arrows at the left/right edges that step to the previous/next image in the booth (gallery sorted-rel order), wrapping around, plus keyboard ←/→. Arrows are hidden when a booth has a single image. booth_view_file computes neighbors via a new booth_image_names() helper and passes prev_url/next_url to view.html. 3 new tests, suite 47 passing; deployed + verified live on nh3-dev :8090.