A node put on the canvas or a workflow opened and never run read as
"never used". The page now notes what each opened workflow holds
(usage_notes.js, POST /anomalous/usage/opened, kept apart from runs in
the run record) and the open tabs just before a check.
Packs whose nodes went unused but which also add to the page (buttons,
menus, monitors) get their own group: unused nodes do not say the pack
is. The packs count covers only packs that work through nodes alone.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
