- Introduced a new configuration option `multibyte_monitor_enabled` in `config.ini.example` to control the visibility of the multibyte monitor page and API endpoints.
- Implemented the `/multibyte-rollout` and `/api/multibyte-rollout` routes in the web viewer, which are accessible only when the multibyte monitor feature is enabled.
- Updated documentation in `web-viewer.md` to reflect the new feature and its configuration.
- Added tests to ensure the multibyte routes are disabled by default and accessible when enabled.