Worked on the chatboxai/chatbox repository over a two-month period, delivering three user-facing features and resolving two bugs with a focus on frontend stability and usability. Addressed modal behavior and session continuity by refining SettingsModal ESC handling and implementing chat session storage restoration, ensuring predictable user experiences and data persistence. Enhanced messaging clarity for free plan usage and improved desktop onboarding through a more prominent download reminder. Upgraded markdown heading readability in message content by adjusting CSS for better accessibility. All changes were implemented using React, JavaScript, and TypeScript, with careful attention to delivery traceability and consistent integration across branches.