Second (last) jQuery/BS4 JS blocker to the BS5 CSS swap. Replaces the
`bootstrap-carousel-swipe` jQuery plugin + `$(...).carousel()` init with
react-bootstrap's <Carousel> (native swipe, no jQuery) for both home carousels.
- Preserves the progressive `.lazy` background mechanism (blur -> full image on
slide-in): the old `slide.bs.carousel` handler becomes <Carousel onSlide>,
which marks the incoming index in component state.
- Keeps all per-slide class hooks (carousel-item-N, carousel-snd-item-N).
- CSS ports in Index-custom.scss for react-bootstrap's BS5 markup: indicators
render as <button> (not <li>), and prev/next labels use .visually-hidden
(BS4 had .sr-only) -> add a shim so labels stay hidden on current BS4 CSS.
- Drops the now-unused bootstrap-carousel-swipe dependency.
Full-app build boots clean. Needs a visual staging check of the home page.
Silences the dart-sass deprecation warnings that flooded every build:
- All @import of local partials (colors, mixins, and the CSS-emitting
partials) -> @use '...' as * (partials are pure defs, so 'as *' keeps the
global names and the ~25 call sites unchanged). Added explicit @use './colors'
to bootstrap-overrides.scss and cookies-eu.scss, which used -palette*
transitively (broke under @use's scoping).
- lighten(c, x%) -> color.adjust(c, $lightness: x%) and darken -> negative,
with @use 'sass:color' in the 6 affected files.
Compiles clean (byte-for-byte CSS behavior preserved).
