Typewriter

This update improves the Kids Mode typing lessons and adds a smoother learning flow for young players. - Improved Kids Mode lesson progression with clearer, more gradual typing practice. - Short sentence lessons now stay on one line instead of requiring unnecessary Enter key presses. - Enter prompts now only appear in later poem lessons where line breaks are part of the exercise. - Added clearer next-key guidance for spaces, letters, and line breaks. - Added a “Next Lesson” flow after completing a lesson. - Improved typing feedback, lesson progress display, and Kids Mode visual polish. - Added new relaxing background music tracks. - Fixed several UI and runtime issues reported in recent builds.