- Introduced a new SSL mode "Mux" in the settings, allowing for HTTP to HTTPS redirection.
- Updated the `SSL` field in the `SettingUpdate` struct to include "Mux" as a valid option.
- Modified the server logic to handle Mux connections, including certificate management and HTTP redirection.
- Updated frontend components to reflect the new SSL options and improved user guidance in multiple languages.

…guidance in multiple languages