Add to cart now reads as a sentence in conversations

When a shopper tapped Add to cart on a product card, the message that appeared in the conversation named the product by its internal id. It now reads "Please add product name to my cart.", and for a product with several variants the chosen variant follows in parentheses.

The dashboard conversation view shows the same sentence, so a transcript reads the way the shopper saw it.

The API and the MCP server return that sentence and the product ids. In the API, a new add_to_cart_request content block follows the shopper's text and carries the product id and title, plus the variant id and label when there is one. It records the shopper's request, not a confirmed cart write.