call: lint/format cleanup for lotus EC wiring

Resolve the eslint/prettier failures from the previous commit (non-blocking
in CI, but real): drop the banned `void` operator on fire-and-forget
transport.send().catch() calls, prefix the now-unused _denoiseNativeNS
param, and run prettier on the touched files.

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

src/app/plugins/call/CallControl.ts

@@ -350,16 +350,12 @@ export class CallControl extends EventEmitter implements CallControlState {
     // DOM-poking tiles. EC's layout honors it — including surfacing the camera
     // alongside a screenshare (A5) — and it's version-stable. The fork always
     // acks, so the promise resolves regardless.
-    void this.call.transport
-      .send('io.lotus.focus_participant', { userId })
-      .catch(() => undefined);
+    this.call.transport.send('io.lotus.focus_participant', { userId }).catch(() => undefined);
   }
 
   /** [lotus #4] Clear any manual spotlight pin and return to speaker-follows. */
   public clearFocusParticipant(): void {
-    void this.call.transport
-      .send('io.lotus.focus_participant', { userId: null })
-      .catch(() => undefined);
+    this.call.transport.send('io.lotus.focus_participant', { userId: null }).catch(() => undefined);
   }
 
   public dispose() {