Merge origin/main into german/navara

Main's camera, voice, Cockpit and layer work now runs on the globe
contract where this branch draws through it:

- The voice tilt to an angle, its pivot about the place under the
  crosshair and the frame limit from orbit run through the camera rig;
  src/globeInView.js measures a camera pose with src/geo instead of a
  Cesium camera. The free-look height limit and the globe-in-view
  recovery stay Cesium-only for now.
- Cockpit takes main's own-layer entry rule. Double-clicking the
  followed track goes through cockpitHost.routeDoubleClick, so it works
  on both engines.
- Space Missions' failed-entry rollback and GhostMaps' age filter run
  in the engine-neutral layer code. On Cesium an expired report is
  dropped in place; on Navara its product is redrawn.
- Wildlife Sightings joins the catalog Cesium-only: Navara leaves it
  out, and the shell builds its card only for the real layer, so a
  Navara page no longer fails to start on its stand-in.
- One instruction sentence is shorter, which keeps the Realtime prompt
  within its 55,500-character budget with the Sentinel-2 basemap.

src/layers/ghostMaps/render/cesium.js

@@ -63,6 +63,7 @@ export function createGhostMapsCesiumRenderer(
               },
             });
             pins.push({
+              index,
               position,
               get show() {
                 return entity.show;
@@ -130,6 +131,20 @@ export function createGhostMapsCesiumRenderer(
       );
       return {
         ready,
+        // Take one report off in place: an expired event leaves its edition's
+        // data source, which stays mounted for the reports that remain.
+        drop(index) {
+          const prefix = `ghostmaps:${productId}:${index}:`;
+          for (const entity of [...dataSource.entities.values])
+            if (entity.id.startsWith(prefix))
+              dataSource.entities.remove(entity);
+          for (let i = pins.length - 1; i >= 0; i -= 1)
+            if (pins[i].index === index) {
+              allPins.delete(pins[i]);
+              pins.splice(i, 1);
+            }
+          return true;
+        },
         destroy() {
           disposed = true;
           for (const pin of pins) allPins.delete(pin);