fix(tracker): do not close Broker but rather just close the detector

tracker/broker.go

@@ -49,6 +49,7 @@ type (
 	// which gets executed in the detector goroutine.
 	MsgToDetector struct {
 		Reset bool
+		Quit  bool
 		Data  any // TODO: consider using a sum type here, for a bit more type safety. See: https://www.jerf.org/iri/post/2917/
 	}
 )
@@ -62,12 +63,6 @@ func NewBroker() *Broker {
 	}
 }
 
-func (b *Broker) Close() {
-	close(b.ToPlayer)
-	close(b.ToModel)
-	close(b.ToDetector)
-}
-
 // GetAudioBuffer returns an audio buffer from the buffer pool. The buffer is
 // guaranteed to be empty. After using the buffer, it should be returned to the
 // pool with PutAudioBuffer.