Replace the flat album grid LabelView with a rich detail page featuring:
- Header with label image, name, description, and play button
- Popular Tracks section (5/10/all expand, same UX as ArtistDetailView)
- Releases horizontal scroll row with "See all" → LabelReleasesView
- Critics' Picks section from second releases container
- Playlists, Artists, and More Labels sections
Backend: add /label/page and /label/explore API endpoints with V2
commands (v2_get_label_page, v2_get_label_explore). Models use
serde_json::Value for flexible section parsing.
Old LabelView renamed to LabelReleasesView for the "See all" flow.
i18n keys added to all 4 locales (en, es, de, fr).
vicrodh
585053bd42