chore: Enforce a few house rules via eslint (#2539)

src/card-controller/call/manager.ts

@@ -285,7 +285,7 @@ export class CallManager {
       restoreView &&
       (previousView.view !== 'live' || previousView.camera !== call.cameraID)
     ) {
-      viewManager.setViewByParametersWithExistingQuery({
+      void viewManager.setViewByParametersWithExistingQuery({
         baseView: previousView,
         force: true,
       });

src/card-controller/call/tones/base.ts

@@ -63,7 +63,7 @@ export abstract class GeneratedTone implements Tone {
   // a stopped tone can never re-arm its loop.
   protected _scheduleNext(intervalSeconds: number): void {
     /* istanbul ignore next: defensive guard against a subclass calling
-       _scheduleNext after stop() — JS single-threading makes this unreachable
+       _scheduleNext after stop() -- JS single-threading makes this unreachable
        from the existing subclasses -- @preserve */
     if (!this._context) {
       return;