Worked on the MHSanaei/3x-ui repository to deliver a new Outbound Traffic Logging Control feature, introducing a user interface switch that enables or disables outbound traffic logging and ensures changes are reflected in system settings. Addressed reliability by improving the SubGroupClients processing logic, validating inputs and handling malformed inbound items to prevent failures. Focused on frontend development and UI enhancements using JavaScript and HTML, with attention to internationalization and maintainability. Emphasized small, focused commits to support safer production deployments and aligned feature delivery with security and compliance requirements by enhancing observability controls and input validation throughout the codebase.