3.8.0

The base theme drops the demo scaffold it shipped since the prototype — a fake in-memory cart, a search input that submitted nothing, and a currency dropdown that posted through a Luma helper this stack does not ship, so clicking it did nothing. In their place: plain, functional markup with no framework and no palette, in the spirit of Blank. Two defects surface with it: the header body rendered nothing at all (the core template prints only when given a show_part, so the logo and the top links never reached the page), and the account link no longer branches on the session, which used to bake signed-in markup into the full-page cache.