chrisko

build(release): prepare wheel test with provenance and GUI fixes

refactor: isolate toolpath planning and modernize packaging

refactor: migrate to domain-oriented package structure

test(coverage): make reports subprocess-aware

test(gui): exercise full MainWindow workflow

test(suite): add portable regression and tox suites

fix(cli): avoid Qt logger shutdown error in quiet export

test(core): cover GIR handling for U-shaped contours