startup_steps_survive_a_rebase_and_running_ends_startup reads the open journal through a clone of its own handle (read_journal_file), as read_live_journal does, instead of opening a second handle that Windows' mandatory lock refuses. Test-only. Fixes#1448.
A primitive's `targets` live in the feature's participants beside its kind; renaming a body now renames them too, so a box or cylinder cutting the renamed body no longer fails with unknown body.
A mesh over the conversion budget is refused with its triangle (or vertex) count, the limit, and that only constant-section parts convert.
Refs #346
Co-Authored-By: Claude Opus 5.5 <[email protected]>
HiroKenEz