lotus(#1): ML denoise as a first-class audio TrackProcessor (fixes A7)

Implements RNNoise/Speex noise suppression as a LiveKit audio
TrackProcessor attached to the local mic track, replacing the host's
build-time getUserMedia monkeypatch. Because EC re-attaches the processor
on every (re)publish (LocalTrackPublished), denoise now survives EC's
mid-call reconnect — the root cause of A7 "mic dead after reconnect".
Reuses the worklet/wasm assets already shipped under ./denoise/ (no new EC
dependency); model/gate configured via lotusDenoise/lotusModel/lotusGate
URL params. Additive: no-op unless lotusDenoise=ml.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/room/InCallView.tsx

@@ -34,6 +34,7 @@ import { startLotusFocus } from "../lotus/lotusFocus";
 import { startLotusAudioInject } from "../lotus/lotusAudioInject";
 import { startLotusQuality } from "../lotus/lotusQuality";
 import { startLotusDecorations } from "../lotus/lotusDecorations";
+import { startLotusDenoise } from "../lotus/lotusDenoise";
 import styles from "./InCallView.module.css";
 import { GridTile } from "../tile/GridTile";
 import { SettingsModal, defaultSettingsTab } from "../settings/SettingsModal";
@@ -299,6 +300,9 @@ export const InCallView: FC<InCallViewProps> = ({
   // [lotus] Receive per-user avatar-decoration URLs from the host and render
   // them on in-call tile avatars (#6). No-op unless the host sends them.
   useEffect(() => startLotusDecorations(), []);
+  // [lotus] Apply ML denoise to the mic as a first-class audio processor that
+  // survives reconnects (#1 / A7). No-op unless lotusDenoise=ml.
+  useEffect(() => startLotusDenoise(vm), [vm]);
 
   const fatalCallError = useBehavior(vm.fatalError$);
   // Stop the rendering and throw for the error boundary