max-width: 100% alone lets img/picture height stay at intrinsic size,
so on narrow viewports images could still overflow vertically or look
squashed. Adding height: auto keeps the aspect ratio correct as width
scales down.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
ProcessMedia was using resize(), which distorts images that aren't the
target aspect ratio; scale() preserves it. Existing medium/small
variants generated before this fix need regenerating, so add an
artisan command (with --dry-run) to do that, plus feature tests.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>