Visual-first slice ties it together (window.VideoYoutube shared helper, all
.vyt-* CSS — music wl-* and the TMDB vwsh-* nebula untouched):
- Search: paste a channel link (or @handle) and instead of a title search you
get a YouTube Follow chip — avatar, title/handle, a strip of recent stills,
and a Follow button that follows + wishes recent uploads in one click.
- Wishlist: new YouTube tab. Channel = collapsible header (avatar, count,
open-on-YouTube, Unfollow), videos = a flat newest-first thumbnail feed with
per-video remove. Tab badge + sub-count wired.
- Watchlist: new Channels tab — followed channels as avatar cards with a wished-
video count and an unfollow control; count badge kept fresh across follows.
JS brace-balanced, CSS balanced, 66 youtube+API tests green.
