- Updated CHANGELOG.md to include version 0.4.1 with fixes related to sing-box, including an upgrade to version 1.13.5 and improvements in configuration validation and error logging.
- Modified Dockerfile to reflect the new sing-box version.
- Enhanced error handling in the sing-box startup process, including configuration checks and stderr logging for better diagnostics.
- Added support for importing Clash/V2ray subscriptions, including automatic format detection and integration with sing-box for protocol conversion.
- Introduced five proxy usage modes in the configuration, allowing flexible selection between mixed, custom-only, and free-only modes.
- Enhanced `.env.example` and `docker-compose.yml` to include new environment variables for custom proxy settings.
- Updated `CHANGELOG.md` to document new features and improvements related to subscription management.
- Improved WebUI for managing subscriptions and displaying proxy statistics.
- Implemented a background process for refreshing subscriptions and probing disabled proxies for reactivation.
