feat(desktop): MPRIS, system tray, and OS integration (P3-16)

akroasis/shared/akroasis-core/src/bin/harmonia/main.rs

@@ -519,8 +519,11 @@ fn read_duration_secs(path: &Path) -> f64 {
 async fn main() -> Result<(), String> {
     tracing_subscriber::fmt()
         .with_env_filter(
-            tracing_subscriber::EnvFilter::from_default_env()
-                .add_directive("akroasis_core=warn".parse().unwrap_or_else(|_| unreachable!("static tracing directive is valid"))),
+            tracing_subscriber::EnvFilter::from_default_env().add_directive(
+                "akroasis_core=warn"
+                    .parse()
+                    .unwrap_or_else(|_| unreachable!("static tracing directive is valid")),
+            ),
         )
         .with_writer(std::io::stderr)
         .init();

akroasis/shared/akroasis-core/src/engine.rs

@@ -235,7 +235,12 @@ impl Engine {
     /// Full inter-task seek coordination is completed in a subsequent pass.
     #[instrument(skip(self))]
     pub fn seek(&self, position: Duration) -> Result<Duration, EngineError> {
-        if self.session.lock().unwrap_or_else(|e| e.into_inner()).is_none() {
+        if self
+            .session
+            .lock()
+            .unwrap_or_else(|e| e.into_inner())
+            .is_none()
+        {
             return Err(EngineError::SeekOutOfBounds {
                 position_secs: position.as_secs_f64(),
                 duration_secs: 0.0,
@@ -327,8 +332,14 @@ async fn decode_task_fn(
 // DSP + output task
 // ---------------------------------------------------------------------------
 
-#[expect(clippy::too_many_arguments, reason = "DSP task receives all pipeline components; splitting further would require wrapper structs")]
-#[expect(unused_variables, reason = "several parameters are used only when native-output feature is enabled")]
+#[expect(
+    clippy::too_many_arguments,
+    reason = "DSP task receives all pipeline components; splitting further would require wrapper structs"
+)]
+#[expect(
+    unused_variables,
+    reason = "several parameters are used only when native-output feature is enabled"
+)]
 async fn dsp_task_fn(
     source: AudioSource,
     mut frame_rx: mpsc::Receiver<Option<DecodedFrame>>,

akroasis/shared/akroasis-core/src/gapless/mod.rs

@@ -75,7 +75,9 @@ fn trim_from_start(frames: &mut VecDeque<Box<[f64]>>, mut remaining: usize) {
             remaining -= frame_len;
             frames.pop_front();
         } else {
-            let frame = frames.pop_front().unwrap_or_else(|| unreachable!("frames.front() returned Some above"));
+            let frame = frames
+                .pop_front()
+                .unwrap_or_else(|| unreachable!("frames.front() returned Some above"));
             let trimmed = frame[remaining..].to_vec().into_boxed_slice();
             frames.push_front(trimmed);
             remaining = 0;
@@ -93,7 +95,9 @@ fn trim_from_end(frames: &mut VecDeque<Box<[f64]>>, mut remaining: usize) {
             remaining -= frame_len;
             frames.pop_back();
         } else {
-            let frame = frames.pop_back().unwrap_or_else(|| unreachable!("frames.back() returned Some above"));
+            let frame = frames
+                .pop_back()
+                .unwrap_or_else(|| unreachable!("frames.back() returned Some above"));
             let keep = frame.len() - remaining;
             let trimmed = frame[..keep].to_vec().into_boxed_slice();
             frames.push_back(trimmed);

akroasis/shared/akroasis-core/src/output/cpal.rs

@@ -1,4 +1,7 @@
-#![expect(deprecated, reason = "cpal 0.17 deprecated name() in favour of description(); migration deferred until cpal 0.18 stabilizes")]
+#![expect(
+    deprecated,
+    reason = "cpal 0.17 deprecated name() in favour of description(); migration deferred until cpal 0.18 stabilizes"
+)]
 
 use std::sync::atomic::{AtomicU64, Ordering};
 use std::sync::{Arc, Mutex};

akroasis/shared/akroasis-core/src/queue.rs

@@ -42,7 +42,10 @@ impl PlayQueue {
     /// Advances to the next track and returns its path.
     ///
     /// Returns `None` when there is no next track (end of queue).
-    #[expect(clippy::should_implement_trait, reason = "PlayQueue::next() advances the queue and returns the track; naming matches domain language, not Iterator")]
+    #[expect(
+        clippy::should_implement_trait,
+        reason = "PlayQueue::next() advances the queue and returns the track; naming matches domain language, not Iterator"
+    )]
     pub fn next(&mut self) -> Option<PathBuf> {
         if let Some(current) = self.current().map(PathBuf::from) {
             self.history.push(current);