Make the Esc Key Close Active Dialogs and Modals

Problem The Esc key currently does not consistently close active dialogs, modals, or pop-ups in Songer. Users working primarily with a keyboard expect Esc to dismiss the currently active window without needing to click the close button. Feature Request Add standard Esc key behavior across Songer: Press Esc to close the currently active modal or dialog. Return focus to the underlying page or previous control. Keep existing keyboard shortcuts such as Spacebar for play/pause and Tab for navigating controls. Why This Matters Standard keyboard behavior makes the interface faster and more accessible, especially for users working extensively with songs, audio controls, and other dialogs. Adding Esc support would also reduce unnecessary mouse interaction and make Songer feel more consistent with common desktop applications.