feat: Add PTT, Volume Sliders, and Device Node Selection

src/audio/mod.rs

@@ -18,11 +18,11 @@ pub enum AudioError {
 pub trait AudioBackend: Send + Sync {
     /// Starts capturing raw PCM audio from the input device (microphone),
     /// sending chunks of samples (e.g. `Vec<i16>`) to the provided Sender.
-    fn start_capture(&self, tx: Sender<Vec<i16>>) -> Result<(), AudioError>;
+    fn start_capture(&self, tx: Sender<Vec<i16>>, target_node: Option<String>) -> Result<(), AudioError>;
 
     /// Starts playing back raw PCM audio to the output device (speaker),
     /// reading mixed/incoming chunks of samples from the provided Receiver.
-    fn start_playback(&self, rx: Receiver<Vec<i16>>) -> Result<(), AudioError>;
+    fn start_playback(&self, rx: Receiver<Vec<i16>>, target_node: Option<String>) -> Result<(), AudioError>;
 
     /// Stops both capture and playback streams.
     fn stop(&self) -> Result<(), AudioError>;