New "Music Videos" pill tab alongside Spotify/Deezer/iTunes/Discogs
in both enhanced search and global search. Searches YouTube via yt-dlp
and displays results in a video card grid with 16:9 thumbnails, play
overlay, duration badge, channel name, and view count.
- Backend: /api/enhanced-search/source/youtube_videos endpoint with
search_videos() method on YouTubeClient returning YouTubeSearchResult
- Frontend: Video grid layout with responsive cards, YouTube red tab
color, proper section hiding when switching between metadata and
video tabs
- Global search: Full parity with enhanced search video rendering
- No download functionality yet — display only
b44bb34b44