The browser backup copies the stored library files, so while a save to
browser storage is failing it reported success but left out the queued
changes. It now refuses with the number of unsaved changes and why
(Session::unsaved), and is allowed again once they are written.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AbegtYaPuwqZ81pGfELsFK