Touch had no way to move between images except the small arrow buttons.
A one-finger horizontal swipe now goes next/previous, and is inert while
the image is zoomed in (where the same gesture pans). The classifier is
pure and unit-tested: ≥ 60 px horizontal, not mostly vertical, under
800 ms, single finger.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA
