chore: remove dead code to eliminate all compiler warnings

- Remove unused get_artist() (replaced by get_artist_page())
- Remove unused Format::label(), Format::all()
- Remove unused QwsTokenResponse and QwsToken structs
- Remove unused PlayerCommand::Seek (seeking uses atomics directly)
- Remove unused PlayerState::Stopped, TrackInfo::format
- Remove unused PlayerStatus::get_current_track()

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

rust/src/player/decoder.rs

@@ -195,11 +195,6 @@ pub fn play_track_inline(
                     paused.store(false, Ordering::SeqCst);
                     *status.state.lock().unwrap() = super::PlayerState::Playing;
                 }
-                Ok(PlayerCommand::Seek(s)) => {
-                    status.seek_target_secs.store(s, Ordering::Relaxed);
-                    status.seek_requested.load(Ordering::SeqCst); // read-side fence
-                    status.seek_requested.store(true, Ordering::SeqCst);
-                }
                 Ok(PlayerCommand::SetVolume(v)) => {
                     status.volume.store(v, Ordering::Relaxed);
                 }

rust/src/player/mod.rs

@@ -7,7 +7,7 @@ use std::sync::{
 };
 use std::time::Duration;
 
-use crate::api::{Format, TrackDto};
+use crate::api::TrackDto;
 
 #[derive(Debug, Clone)]
 pub enum PlayerCommand {
@@ -15,7 +15,6 @@ pub enum PlayerCommand {
     Pause,
     Resume,
     Stop,
-    Seek(u64),
     SetVolume(u8),
 }
 
@@ -23,7 +22,6 @@ pub enum PlayerCommand {
 pub struct TrackInfo {
     pub track: TrackDto,
     pub url: String,
-    pub format: Format,
     /// ReplayGain track gain in dB, if enabled and available.
     pub replaygain_db: Option<f64>,
 }
@@ -33,7 +31,6 @@ pub enum PlayerState {
     Idle,
     Playing,
     Paused,
-    Stopped,
     Error(String),
 }
 
@@ -87,9 +84,6 @@ impl PlayerStatus {
         self.volume.load(Ordering::Relaxed)
     }
 
-    pub fn get_current_track(&self) -> Option<TrackDto> {
-        self.current_track.lock().unwrap().clone()
-    }
 }
 
 pub struct Player {
@@ -169,10 +163,6 @@ fn player_loop(rx: std::sync::mpsc::Receiver<PlayerCommand>, status: PlayerStatu
                     Ok(PlayerCommand::SetVolume(v)) => {
                         status.volume.store(v, Ordering::Relaxed);
                     }
-                    Ok(PlayerCommand::Seek(s)) => {
-                        status.seek_target_secs.store(s, Ordering::Relaxed);
-                        status.seek_requested.store(true, Ordering::SeqCst);
-                    }
                     Ok(_) => {} // Pause/Resume ignored when idle
                     Err(RecvTimeoutError::Timeout) => {}
                     Err(RecvTimeoutError::Disconnected) => break 'outer,