Reverts the 240px preview cap — frames render at their natural device aspect
again. Single-frame layout unchanged.
For multi-frame setups, replaces the compact stack with a horizontal
scroll-snap carousel: one large card per slide, full-bleed to the viewport
edges, with dot navigation below that tracks the active slide and supports
tap-to-jump. Native CSS scroll-snap drives the swipe gesture; no extra JS
gesture library.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
