Pull skipped notes carrying a deleted_at tombstone but never removed the
matching local annotation. A highlight deleted on Readest therefore lingered
in KOReader, and a later push (notably a full sync) re-uploaded it,
resurrecting the note on the server and making it reappear on every device.
Add removeDeletedAnnotations, invoked at the start of the pull callback, to
drop local annotations the server has tombstoned. Tombstones are matched by
stored id, by the hash-derived id for native KOReader highlights, or by
position/page xpointer.
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
When syncing highlights between Readest and KOReader, the `note` field
was forced to an empty string (`""`) for annotations and bookmarks
without notes. KOReader's native annotations omit the field entirely
when no note exists, so the empty string caused KOReader to treat
every synced highlight as having a (blank) note. Apply the same
omission in both push and pull directions.
Co-authored-by: Claude <noreply@anthropic.com>