Treat Filebrowser state as file-backed dump

ops/borg-ui/scripts/pre-backup-dumps.sh

@@ -138,6 +138,23 @@ dump_sqlite_container() {
   atomic_write "$output" "$tmp"
 }
 
+dump_file_copy() {
+  source="$1"
+  output="$2"
+  label="$3"
+
+  if [ ! -f "$source" ]; then
+    warn "Skipping missing file dump for $label: $source"
+    return 0
+  fi
+
+  tmp="$TMP_DIR/$(basename "$output").tmp"
+  log "Copying file-backed state '$label' from $source"
+  rm -f "$tmp"
+  cp "$source" "$tmp"
+  atomic_write "$output" "$tmp"
+}
+
 dump_optional_pg_db() {
   container="$1"
   password="$2"
@@ -245,7 +262,9 @@ main() {
   dump_sqlite_container "vaultwarden" "/data/db.sqlite3" "$LATEST_DIR/vaultwarden.sqlite.dump" "/mnt/user/appdata/vaultwarden/db.sqlite3"
   dump_sqlite_container "uptime-kuma" "/app/data/kuma.db" "$LATEST_DIR/uptime-kuma.sqlite.dump" "/mnt/user/appdata/uptime-kuma/kuma.db"
   dump_sqlite_container "speedtest-tracker" "/config/database.sqlite" "$LATEST_DIR/speedtest-tracker.sqlite.dump" "/mnt/user/appdata/speedtest-tracker/config/database.sqlite"
-  dump_sqlite_container "filebrowser" "/database/filebrowser.db" "$LATEST_DIR/filebrowser.sqlite.dump" "/mnt/user/appdata/filebrowser/database/filebrowser.db"
+
+  # Filebrowser uses file-backed app state, but this installation is not SQLite.
+  dump_file_copy "/mnt/user/appdata/filebrowser/database/filebrowser.db" "$LATEST_DIR/filebrowser.bolt.dump" "filebrowser"
 
   # Additional host-side SQLite dumps for admin tooling with appdata files.
   dump_sqlite_file "/mnt/user/appdata/borg-ui/data/borg.db" "$LATEST_DIR/borg-ui.sqlite" "borg-ui"