- Improved logic for determining the top message on the results screen (including identical records, ensuring consistency across periods). - Fine-tuned the header/row spacing of the main ranking table. - Re-adjusted the layout/spacing of the main ranking table (to prevent truncation on small screens). - Stabilized the logic for switching the top message period on the results screen. - Support for daily/weekly/monthly ranking radio and period selection on the results screen. - Added guidance on ranking calculation methods and game play in the settings. - Improved the countdown and UI/sound after hint/shuffle reward ads. - Adjusted the iPhone/iPad layout and home/game UI. - Restructured the bottom banner ad to remain a shared instance on the main/game/settings/results screens. - Removed the FE's backup/restore feature (removed initial launch restore, settings restore, and server backup calls). - Restricted nickname input to letters and numbers only, and blocked input and saving of spaces and special characters.