Feature
Progressive rendering for set list (48 cards initially, loads more on scroll). Lazy-loaded images with explicit dimensions. Resized oversized set thumbnails.
Mobile Scroll Optimization
Replaced rendering all ~830 sets at once with progressive loading via IntersectionObserver (48 cards initially in gallery, 60 in compact, loads more as user scrolls). Added lazy loading and explicit width/height to all set thumbnail images to prevent layout reflow. Resized oversized set images (several were 2-3MB, now 200-400KB after resize to 800px max width).