fix: switch to a single threaded runtime for more predictable behaviour

Cargo.toml

@@ -30,7 +30,7 @@ fastrand = "2.3.0"
 thiserror = "2.0.12"
 
 # Async
-tokio = { version = "1.41.1", features = ["macros", "rt-multi-thread", "fs"], default-features = false }
+tokio = { version = "1.41.1", features = ["macros", "rt", "fs"], default-features = false }
 arc-swap = "1.7.1"
 futures = "0.3.31"
 

src/main.rs

@@ -101,7 +101,7 @@ pub fn data_dir() -> crate::Result<PathBuf> {
 /// Parses CLI arguments, initializes the audio stream and player, then
 /// runs the main event loop. On exit it performs cleanup of the UI and
 /// returns the inner result.
-#[tokio::main]
+#[tokio::main(flavor = "current_thread")]
 async fn main() -> eyre::Result<()> {
     let args = Args::parse();