- Introduce new `#np-bigroom-view` overlay for single-song playback with centered layout and animated circular spectrum visualizer (`#np-viz-big`)
- Refactor now-playing overlay to toggle between playlist mode and big-room mode based on `meta.singleMode`
- Add real-time canvas-based frequency visualization using analyser node, exposed globally as `window.briTunesAnalyser`
- Update song/playlist pages to support single-song playback via new `data-nowplaying-meta` attribute
- Add smart "Now Playing" reopen button that only appears when matching song/playlist is active, with per-song or per-playlist matching
Brian Fertig