feat(icom): the speaker choice appears beside the RX-audio option too

Same remembered preference as the console's speaker button, surfaced where
the stream itself is enabled — tick RX audio and decide in the same breath
whether it reaches the speakers. Applied immediately, no save needed.

app.go

@@ -21105,3 +21105,10 @@ func (a *App) CheckHamlogKey(key string) (string, error) {
 	defer cancel()
 	return extsvc.CheckHamlogKey(ctx, nil, key)
 }
+
+// GetAudioMonitorPref says whether the network RX audio should be played
+// through the Listening device — the remembered speaker choice behind the
+// console's speaker button and the CAT panel's checkbox.
+func (a *App) GetAudioMonitorPref() bool {
+	return a.settingOr(keyAudioMonitorOn, "1") == "1"
+}