Worked on the libsdl-org/SDL repository to enhance the tray subsystem, focusing on maintainability and extensibility across multiple backends. Using C programming and system programming skills, introduced architectural changes such as reinstating parent fields in SDL_dbustray structures to restore correct subclassing and enable safe casting. Updated naming conventions for clarity and standardized internal state handling by adding an internal member to tray structures, aligning the subsystem with other SDL backends. These improvements reduced the risk of regressions and made it easier to integrate new backends, supporting consistent state management and future development within the SDL backend architecture.