OPFS lookups turned any exception into "absent", and start-up only logged
other read errors, so a library with an unreadable file opened incomplete
and the next save could overwrite the stored copy. Only NotFoundError now
means absent; when a stored library file or the active-library pointer
can't be read, the library isn't opened, nothing is saved and the window
names the file. An unreadable thumbnail index no longer deletes every
stored thumbnail as unindexed.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AbegtYaPuwqZ81pGfELsFK
Claude
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