* fix(packaging): derive the Flatpak and AUR dependency sets from the lock * test(packaging): add return annotations on new packaging tests Greptile asked for -> None on the new tests, matching AGENTS.md. * test(packaging): type parametrized Flatpak source arguments Greptile asked for type hints on the source parameter, matching AGENTS.md. --------- Co-authored-by: jatinkrmalik <jatinkrmalik@gmail.com>