Worked on the univelop/yust_ui repository to deliver targeted improvements in user experience and reliability for Flutter applications. Focused on UI development using Dart, the work introduced a guardrail to prevent duplicate actions by adding an allowDoubleClick property to button components, ensuring actions are triggered only once per user interaction. Additionally, implemented a forceErrorText parameter for input fields, allowing explicit error messages to be displayed regardless of validation state. These enhancements addressed common usability issues, reduced user error, and improved feedback for developers integrating these components, reflecting a thoughtful approach to robust and maintainable Flutter UI engineering within a short timeframe.