Responsive images

Opt a bucket into responsive images with ->responsiveWidths(). The package generates one variant per width through the same engine — honouring the sync/queue rules and the variants disk — and never upscales past the original:

$this->addMediaBucket('hero')
    ->useDisk('public')
    ->responsiveWidths([480, 960, 1440, 1920]) // omit for the config default ladder
    ->responsiveFormat('webp');                // optional — defaults to the original's format

$media->srcset();
// "…-480.webp 480w, …-960.webp 960w, …" (ascending, only generated widths)

$media->responsiveImage('', ['alt' => 'Hero', 'sizes' => '100vw', 'class' => 'rounded']);
// full <img> tag with srcset + LQIP blur-up background

responsiveImage() emits a full <img> tag with the smallest generated width as the src fallback, the srcset, optional sizes/alt/class, and the LQIP placeholder as an inline blur-up background. media:regenerate rebuilds widths; media:clean removes orphaned width files.