Michal Vrba
c6a8055ece
Replaces default Blazor loading spinner with a custom, animated music-themed loader featuring a gradient background, floating musical notes, logo, equalizer animation, and dynamic progress bar/messages. Removes old loader CSS from app.css and adds new styles to index.html. Loader progress and messages are now animated via JavaScript, with interactive note effects on click. Loader and background fade out smoothly when the app is ready.