* feat: add auto lookback mode Automatically shows full terminal history after idle timeout, returns to truncated view when new output arrives. - Add auto_lookback_timeout_ms config option (default: 1000ms) - Add --auto-lookback-timeout CLI flag - Set to 0 to disable the feature * intermediate * auto lookback --------- Co-authored-by: Ilya Sinkin <ilyasinkin2002@yandex.kz>