abstract class ConnectLogs {
  /// A fetch finished (the lines themselves arrive on the log stream).
  void onLogsFetched();

  /// The unit's current systemd status, e.g. `active (running)` or `no-unit`.
  void onStatusLoaded(String status);

  /// A start / stop / restart finished, with the message to surface.
  void onControlFinished(String message);

  /// Live tail started or stopped.
  void onFollowChanged(bool following);

  /// The filtered log text was written to [path], or cancelled when null.
  void onLogsSaved(String? path);
}