Replaced QVBoxLayout with QGridLayout for flexible positioning in `DeviceWidget`. Added overlays, labels, and interactive buttons to improve UI and functionality. Introduced new image assets for icons and removed unused files to optimize resources.
Removed redundant "numbers" field from Account model and database queries to simplify account structure. Introduced a TutorialWindow class for displaying application tutorials, integrated into the main window, and updated file paths accordingly. Improved string handling and logic in Payment routines and enhanced overall UI structure.
