Worked on the CreaMakers/changli-planet-app repository to address a navigation issue affecting Mandarin interface users on Android. Focused on restoring full-screen gesture support by refining WebView back navigation logic in Kotlin, ensuring that when the back stack is exhausted, the activity exits as expected. This targeted bug fix aligned gesture behavior with other locales, reducing user friction and improving the overall mobile experience. The solution was delivered through a single, traceable commit and validated with UI flow testing, demonstrating careful risk management and attention to user experience. Skills applied included Android development, mobile development, and proficiency in Kotlin.