Every domain and path node starts collapsed, so paths stay hidden until
a host is expanded. The nodes the user expands are kept by id in local
storage, so they stay open across launches; hosts seen later start
collapsed. The Domains folder, selection and counts are as before. The
shared tree is unchanged: the proxy hands it its own collapsed atom.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
