mergeServerCartIntoLocal() relied on CartSync's own change-triggered
push to upload the merged cart — but if the server cart was empty
(first login on this account) and the local guest cart wasn't, the
merge loop never actually ran (nothing in the server response to
add), so no write/change-event ever fired and CartSync's effect never
pushed anything. The guest cart looked fine on the device that just
logged in, but never reached any other device. Now pushes explicitly
at the end regardless of whether anything changed.
Marco
1ec442cc05
