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Layered progressive polish on the warm classic + brass theme: - Card entrance animation on first mount (virtualizer-aware) - Cursor-tracking brass spotlight border on cards - Thumbnail skeleton shimmer until the poster paints - Hover video preview after a short dwell (only when formats resolved) - View Transition + blurred-poster ambient backdrop on player open - Favorite heart pop + expanding ring on add - ⌘K command palette (search, theme, density, reels, source/channel) - Scroll-progress bar + back-to-top FAB - Grid density toggle (comfortable/compact) - Reels HUD: serif title, brass scrubber, muted-state pulse All new motion respects prefers-reduced-motion; no JS/HTML structure changes to the core grid/feed. New glue lives in frontend/js/enhance.js. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>