Slide-mode images rendered at intrinsic ratio, top-aligned inside the
swiper chain (--pc-height:auto left .swiper-wrapper content-sized), so
the taller box showed a gap at the bottom and never center-cropped like
the image cover. The video cover had the same problem through
video-player.js (height:auto, capped at 70vh).
- aksrt_render_slider scale mode emits --pc-height/--m-height 100% so
the wrapper/slide/img chain fills the ratio box and object-fit: cover
center-crops inside it (same pattern as the .scale-height widgets)
- video-player.js renders the video at height:100% + object-fit:cover;
with an undimensioned container height:100% degrades to auto,
matching the previous behavior
- drop the dead .single-cover padding-bottom rules (every producer owns
its height inline, and the rule squeezed the absolutely positioned
slide inner) and the orphaned --single-cover-scale var in
tokens.css/compat-vars.css/main.css/InlineStyleBuilder
- rebuild public bundles; extend the single-cover-height contract
kate522