YuSu输入法

- Redesigned companion app with Keyboard, Tools, and Me tabs. - Added 5 themes, responsive iPad layouts, keyboard height and one-handed controls. - Added keyboard panels for emoji/kaomoji, text editing, clipboard history, and quick phrases. - Improved English input with capitalization, spacing, prediction, user dictionary, and mixed Chinese-English typing. - Added handwriting with Apple Pencil pressure support. - Added QWERTY number row and improved T9 performance, numeric layout, and component-code input. - Voice input moved to the main app; unreliable keyboard voice buttons were removed. - Added optional six-mode AI Rewrite with safer selected-text replacement. - Added cloud hot-word candidates and clearer Full Access/privacy controls. - Fixed selected-text networking detection and now shows the exact Full Access settings path.