The last consumer (api_server REST handlers) was migrated to
commands_v2::v2_play_track / v2_seek / v2_set_volume in the previous
commit, so the file's three remaining #[tauri::command] functions
(play_track, seek, set_volume) plus the unregistered prefetch_track,
get_playback_state, and all helper symbols (parse_quality,
limit_quality_for_device, PlayTrackResult, StreamInfo, download_audio,
get_stream_info, extract_audio_format_from_header, download_and_stream,
spawn_prefetch, prefetch constants, PREFETCH_SEMAPHORE) had zero
remaining callers.
Drops the `pub mod playback;` and `pub use playback::*;` lines from
commands/mod.rs. Only user_session.rs remains in the legacy commands
module.
cc
vicrodh
dc16e71617