6ae567d008
The root cause: buildManifestIndex was discarding manifest localIdentifiers and switching to pure filename-only matching whenever dirCount > manifest.totalCount (which is always true when the NAS has files from other tools). If filenames didn't match exactly, Already Safe dropped to 0 on every stale-cache reconcile. Fix: introduce ManifestIndex(manifest:nasFilenames:totalCount:) — a hybrid that keeps Kisani's localIdentifiers as primary keys AND adds all NAS directory filenames for filename-fallback. Used in: - buildManifestIndex (full reconcile) - fast path (when dirCount > cached.entries.count, previously gated at <= 1) - BackupEngine step 3b (so "Back up again" only uploads genuinely missing files) Also simplify countSafe / pendingIDs / step-4 filter to always try filename fallback (removes the isFilenameOnly gate that blocked matches when the index had IDs). Co-Authored-By: Kutesir <kutesir@provoc.ug> Co-Authored-By: Sentry <sentry@provoc.ug>