refac: audio input

src/lib/components/chat/MessageInput/CallOverlay.svelte

@@ -217,7 +217,13 @@
 	const startRecording = async () => {
 		if ($showCallOverlay) {
 			if (!audioStream) {
-				audioStream = await navigator.mediaDevices.getUserMedia({ audio: true });
+				audioStream = await navigator.mediaDevices.getUserMedia({
+					audio: {
+						echoCancellation: true,
+						noiseSuppression: true,
+						autoGainControl: true
+					}
+				});
 			}
 			mediaRecorder = new MediaRecorder(audioStream);