- Removed the `format_session_list` function and related session handling from the client module.
- Simplified command output in the client by removing session-related commands.
- Introduced `ChannelInputAdapter` for parsing channel commands like `/new` and `/save`.
- Updated WebSocket handling to process commands via the new command system.
- Removed deprecated in-chat command handling from the gateway.
- Adjusted tests to reflect changes in command serialization and session handling.
- Enhanced session cleanup and job scheduling in the configuration module.
