boof2015/astra ? reverse-engineered prompt

Build me a desktop music player for people with a local music library, something that feels polished and fast and works offline.

It should let me point it at my music folders, scan the library, show album art, artists, albums, tracks, and play everything with gapless playback and pre buffering so albums flow correctly. I want a nice player screen with a seek bar, waveform, fullscreen album art, mini player, and synced lyrics that can come from embedded lyrics or LRC files.

Please include a strong audio settings area with output device selection, loudness normalization, per channel remapping, delay calibration, and a parametric equalizer with presets and AutoEQ import. Real time visualizers would be great too. If it makes sense, add scrobbling, Last.fm style integrations, and support for local network playback control, but keep all network features optional and off by default.

Use current docs online if you need to, and make it feel like a modern native desktop app.