- Collections: filters and sort via the Storefront API — the products
connection now takes `filters`/`after` and returns its facets, with
cursor-based load more on the collection page
- Extract ProductFilters (renamed from SearchFilters) and a shared
ProductToolbar so search and collections use the same chrome
- PDP: mark option values with no in-stock variant using a diagonal
strike, computed against the other selected options
- PDP: pointer drag-scrolling for the mobile image carousel, since a
scroll container doesn't drag with a mouse
- Header/cart: circular icon buttons, tighter spacing, and icon sizes
set by class (Button's base CSS clamps un-classed svgs to size-4)
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016jWbNNJLksC1QG8z8845FX
