Improvement: Enhance Mobile Responsiveness

[AArchange]

trafficstars

Description: Optimize the user interface for mobile devices to improve usability and accessibility on smartphones and tablets. Tasks: Review and refine the mobile design. Ensure all features and functions are accessible on mobile. Test the system on various devices and screen sizes. Acceptance Criteria: The billing system is fully functional and user-friendly on mobile devices. No major usability issues on smartphones and tablets.