fix: Bug - User automatically leaves voice after short period of time

Ignore stale P2P self-disconnect voice-state echoes while this client actively owns voice, refresh noise-reduction input on re-join, and repair dual-signal E2E harness expectations.

Co-authored-by: Cursor <cursoragent@cursor.com>

toju-app/src/app/infrastructure/realtime/media/noise-reduction.manager.spec.ts

@@ -0,0 +1,40 @@
+import {
+  describe,
+  expect,
+  it,
+  vi
+} from 'vitest';
+import { NoiseReductionManager } from './noise-reduction.manager';
+
+describe('NoiseReductionManager', () => {
+  it('replaces the input stream when noise reduction is already enabled', async () => {
+    const manager = new NoiseReductionManager({
+      info: vi.fn(),
+      warn: vi.fn(),
+      error: vi.fn()
+    } as never);
+    const rawStream = createFakeMediaStream('fresh-track');
+    const replacedStream = createFakeMediaStream('clean-track');
+
+    vi.spyOn(manager, 'replaceInputStream').mockResolvedValue(replacedStream);
+
+    const enabledManager = manager as NoiseReductionManager & {
+      _isEnabled: boolean;
+      destinationNode: { stream: MediaStream };
+    };
+
+    enabledManager._isEnabled = true;
+    enabledManager.destinationNode = { stream: createFakeMediaStream('stale-track') };
+
+    await expect(manager.enable(rawStream)).resolves.toBe(replacedStream);
+    expect(manager.replaceInputStream).toHaveBeenCalledWith(rawStream);
+  });
+});
+
+function createFakeMediaStream(trackId: string): MediaStream {
+  return {
+    getAudioTracks: () => [{ id: trackId }],
+    getVideoTracks: () => [],
+    getTracks: () => [{ id: trackId }]
+  } as MediaStream;
+}

toju-app/src/app/infrastructure/realtime/media/noise-reduction.manager.ts

@@ -66,8 +66,8 @@ export class NoiseReductionManager {
    */
   async enable(rawStream: MediaStream): Promise<MediaStream> {
     if (this._isEnabled && this.destinationNode) {
-      this.logger.info('Noise reduction already enabled, returning existing clean stream');
-      return this.destinationNode.stream;
+      this.logger.info('Noise reduction already enabled, replacing input stream');
+      return this.replaceInputStream(rawStream);
     }
 
     try {