- File > Back Up Library... (web): a zip of the catalog files and every
stored original, built entry by entry; Restore Library from Backup...
reads it into a new library folder and switches only when complete
(the previous library stays in storage).
- Failed flushes to browser storage make the catalog Store refuse
writes, so changes show as unsaved (top-bar warning) and are retried
every 2 s instead of being lost silently.
- A picked/dropped photo whose bytes can't be stored is not added.
- One tab per library (Web Locks); a second tab shows a message.
- Notices: storage not persistent, library failed to open (temporary
session), experimental build; ?reset asks first; a panic shows a
message instead of a frozen page; long toasts wrap.
- Hosting: _headers/.htaccess no longer mark the unhashed .js/.wasm
immutable; HOSTING.md rewritten for the actual build.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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