Si4Keyboard

• **Keyboard Guide Feature** - New floating hint guide system to help users quickly learn keyboard usage. Interactive three-step guide covering key exchange, encryption, and decryption with automatic button highlighting and page navigation • **Optimized Key Selection** - When only one public or private key is available, the system automatically selects it by default, simplifying the user experience especially for first-time users • **Improved Key Selection UI** - Added select decryption private key functionality on the left side of keyboard for better accessibility and intuitive operation • **Enhanced Short Link Messages** - Improved hint messages during short link generation process with better multilingual display support • **Code Refactoring** - Refactored keyboard setup code structure for better maintainability and improved initialization flow • **Bug Fixes** - Fixed multiple known issues, improved application stability, optimized code performance, and reduced memory usage