* feat: replace hub error toasts with warning alerts and add disable hub setting Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * fix: guard hub script cache refresh when hub is disabled Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>