fix(camera): leave flights and scenes to their framing

Review follow-ups for the globe-in-view recovery and voice limits.

- Leave a camera flight in progress and a playing Director scene, holds
  included, to their own framing. The recovery is now installed with the
  scene tools, which own the Director, and reads its running state.
- Reuse a voice turn's half-degree proof only from the position and
  direction it was proven at, so a release that moves the camera checks
  the turn again.
- Share one free-globe-camera check between the recovery, the voice
  turn limit and the globe rotation.
- Keep an enableLook setting other code makes after the free-look limit
  is installed, instead of writing back the install-time value.
- Name the nudging test for what it asserts, the 1% floor, and document
  that a view losing its surface without a camera move waits for the
  next one.

src/app/scene.js

@@ -3,12 +3,9 @@ import * as Cesium from 'cesium';
 import {
   createApplicationViewer,
   installFreeLookHeightLimit,
-  installGlobeInViewRecovery,
   installTrackpadPinchZoom,
 } from '../app/viewer.js';
 import { registerDataCredits } from '../data/dataCredits.js';
-import { KEYHOLE_OUTER_RADIUS } from '../celestialRing.js';
-import { isScopeMaskEnabled } from '../scopeMask.js';
 import { configureCreditKeyboardAccess } from '../creditKeyboard.js';
 import { MapStackController } from '../mapStackController.js';
 import { loadPhotorealisticTileset } from '../mapStartup.js';
@@ -63,12 +60,6 @@ export async function createApplicationScene({
   });
   defer(installTrackpadPinchZoom(viewer));
   defer(installFreeLookHeightLimit(viewer));
-  defer(
-    installGlobeInViewRecovery(viewer, {
-      // The scope mask hides everything outside its keyhole.
-      keyholeRadius: () => (isScopeMaskEnabled() ? KEYHOLE_OUTER_RADIUS : 0),
-    }),
-  );
   registerDataCredits(viewer, credits);
   configureCreditKeyboardAccess(document);
   defer(onLocaleChange(() => configureCreditKeyboardAccess(document)));