Branch S of the 2026-08-03 cortinilla parity contract, signed off then and
never merged. Its Slint half edited crates/qbz, which pre-release has since
retired; those files stay deleted, and only the qbz-app changes land. The
three search files had not moved on pre-release since the branch forked.
qbz-app library tests pass (295) and the qbz-qt release build is clean.
cc