_session_info() used os.getcwd() which reflects the gateway process
working directory, not the user's actual working directory. This caused
the TUI status line to display incorrect paths (e.g. D:\HermesWork
instead of D:\Hermes\HermesWork) after agent turns that changed the
process cwd.
Align with session.create which already correctly reads TERMINAL_CWD
env var set by the CLI launcher.