Assistant now favors a full product page over a one-item carousel

When the assistant has several products to show, it still uses the product carousel. When it has narrowed things down to exactly one, it now more often shows the full product page instead (image gallery, pitch, price, and add-to-cart), since that reads better than a carousel with a single card in it.

This is a shift in the assistant's own judgment, not a hard rule: it still decides case by case, and both tools need to be enabled on the agent version (see Chat tools).