Worked on the lvgl/lvgl repository to enhance the reliability and visual consistency of the graphics subsystem, focusing on horizontal line rendering. Addressed a critical bug affecting dash length accuracy, which previously led to visual artifacts and inconsistent UI presentation across platforms. Applied C programming and graphics programming expertise to refine the rendering logic, ensuring precise dash lengths and improved drawing accuracy. Emphasized maintainability and correctness by conducting targeted debugging and thorough regression validation within the graphics pipeline. No new features were introduced during this period, as the primary objective was to align the rendering path with code review standards and release quality.