The Pixlet editor stop route restarts the display after a SIGKILL with
_run_systemctl_command, which starlark.py never imported (since #554). The
Starlark device-location resolver fell back to _ensure_cache_manager, which
#609 deleted; the resolver already accepts no cache manager. Both raised
NameError on the rare path that reaches them. pyflakes finds no other
undefined names in src/ or web_interface/.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
