Performance:
- Batched ownership: new db.library_ids_for_tmdb() resolves a whole rail in one
query per kind. _stamp_owned (now also used by search + trending) groups by
kind, so a full Discover page drops from ~500 connections to a couple per rail.
Function/data:
- 'See all' on every rail opens it as a paged grid (Load more); the filter bar's
Browse routes through the same generic category grid with a back button + title.
- Personalized 'Because you like <Genre>' rails seeded from your most-owned
genres (new db.top_owned_genres + /discover/taste endpoint).
- 'Hide owned' toggle drops in-library titles from every rail/grid (CSS class,
instant).
Visual vibes:
- Ambient page-top color bleed that follows the current hero slide's hue.
- Rail edge-fade mask, gentle fade-in on load, per-title hue glow on card hover.
Tests: +4 (batched id map, server scoping, one-query-per-kind stamp, top genres).
Full video enrichment + database suites: 145 passed.
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