Single-product page showed basePrice with no discount while list tiles
showed the cheapest variant's discounted price. Cause: the detail view
defaulted selectedColor/selectedSize to the first in-stock color and the
first in-stock size independently — a combo that often isn't a real
variant, so no variant matched and it fell back to basePrice / no sale.
- ProductDetailView: derive a `defaultVariant` (cheapest in-stock variant
by final price, == the tile's min/discount price) and use it for the
initial selection, the initial displayed price, and the fallback when no
exact color/size combo is matched. A shared `pricingOf` helper applies
the same discount rule everywhere. Detail price now matches the tile.
- use-home-hooks: drop staleTime 5m -> 60s on the For You / discounts /
top-sellers feeds so price/discount edits show up promptly in lists.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
