Fix bugs and clean noise reduction

src/app/core/services/webrtc.service.ts

@@ -576,6 +576,15 @@ export class WebRTCService implements OnDestroy {
     return this.mediaManager.getLocalStream();
   }
 
+  /**
+   * Get the raw local microphone stream before gain / RNNoise processing.
+   *
+   * @returns The raw microphone {@link MediaStream}, or `null` if voice is not active.
+   */
+  getRawMicStream(): MediaStream | null {
+    return this.mediaManager.getRawMicStream();
+  }
+
   /**
    * Request microphone access and start sending audio to all peers.
    *
@@ -648,6 +657,18 @@ export class WebRTCService implements OnDestroy {
     this.mediaManager.setOutputVolume(volume);
   }
 
+  /**
+   * Set the input (microphone) volume.
+   *
+   * Adjusts a Web Audio GainNode on the local mic stream so the level
+   * sent to peers changes in real time without renegotiation.
+   *
+   * @param volume - Normalised volume (0-1).
+   */
+  setInputVolume(volume: number): void {
+    this.mediaManager.setInputVolume(volume);
+  }
+
   /**
    * Set the maximum audio bitrate for all peer connections.
    *