Two new domain skills for amazon.com derived from a logged-in session:
- cart.md: documents the empty-cart trap where `[data-asin]` selectors
match recommendation widgets even on an empty cart, plus the stable
subtotal selectors and the price-change banner format.
- orders.md: covers the order-list card structure, the order-search
quirk (the `?search=` URL param doesn't filter — must submit the
form or hit the post-submit `/your-orders/search/` URL), and the
tracking page (whose `data-test-id` selectors are all null — extract
from `body.innerText` anchored on the "Arriving" line).
Isky