Worked on the nccasia/mezon-fe repository to enhance the reliability of the pin message flow by focusing on end-to-end testing infrastructure. Addressed a specific bug by reverting previously added e2e markers, which involved removing identifiers from the channel top bar, context menu, delete message modal, and pin message modal, as well as updating related constants. This targeted change aimed to reduce test flakiness and streamline maintenance, ensuring consistent UI behavior without introducing new features. Utilized JavaScript and TypeScript for component development and frontend improvements, demonstrating a methodical approach to risk mitigation and test hygiene within a short project period.