Design polish from feedback:
- Playlist cards are now a "stack of clips" cover: the first video's thumbnail
fills a 16:9 tile with two offset/rotated layers peeking behind it (::before/
::after). A themed gradient scrim (accent-strong→accent→clear, via color-mix)
darkens the base so the title sits BOLD and WHITE over the cover instead of
small grey text underneath. Video count moved to a pill in the top-right.
channelPlaylists.js resolves the cover from the app's active videos
(buildVideoAddressPointer → video.thumbnail), falling back to playlist.image.
- Back button on the playlist view: was a bare "← Back to channel" text link, now
a proper .btn-ghost (sm) pill with a chevron icon — matches the site's buttons
and is theme-aware.
- tokens.css: added --size-4px/--size-5px for the stack offsets (token lint).
Scrim/title use --color-white (always light — the scrim is always dark
regardless of theme). Lint + build clean.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
