Product cards now use CSS scroll-snap on touch devices (mobile) for
swiping between images, with dot indicators and a JS hook for active
state. Desktop keeps the existing hover crossfade via @media (hover:
hover). Dots use size differentiation (WCAG 2.2 AA compliant) with
outline rings for contrast on any background.
Also fixes: no-image placeholder (SVG icon instead of broken img),
unnecessary wrapper div for single-image cards, and dev static asset
caching (was immutable for all envs, now only prod).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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