fix(voice): keep FIRMS and ALPR entity labels English in voice data

The fire and camera labels in the context store, getStrongestFire() and
getSelectedInfo() were translated at the source, so the voice model got
"Пожар · FRP 12 МВт" or "Cámara ALPR" in track_entity,
get_entity_context and pointer_context while every other entity name in
those payloads is English. Keep them English, as before the interface
was translated; the voice card translates them where it shows them.

src/data/firmsInteraction.test.mjs

@@ -8,6 +8,8 @@ import * as Cesium from 'cesium';
 import { createFirmsHeatmapLayer, applyFirmsOverlayPolicy, buildCellCard } from './firmsHeatmap.js';
 import { fireDetectionKey } from './firmsLabels.js';
 import { registerPickOwner, unregisterPickOwner } from './pickRegistry.js';
+import { getSelectedEntityContext } from './contextStore.js';
+import { setLocale } from '../i18n/index.js';
 import { WORLD_FOCUS_REQUEST_EVENT } from '../worldFocus.js';
 import { readLayerSource } from '../testSupport/readLayerSource.mjs';
 import path from 'node:path';
@@ -234,6 +236,22 @@ test('clicking a fire CARD behaves exactly like clicking its sprite', () => {
   }
 });
 
+// The voice model reads these labels as data (track_entity, get_entity_context,
+// pointer_context); the voice card translates them where it shows them.
+test('fire labels stay English data in a translated interface', () => {
+  setLocale('ru');
+  const h = harness({ fires: [makeFire()], picked: { id: 'firms-7' } });
+  try {
+    h.click();
+    assert.equal(getSelectedEntityContext().label, 'Fire · FRP 1520 MW');
+    assert.equal(h.layer.getSelectedInfo().label, 'Fire · FRP 1520 MW');
+    assert.equal(h.layer.getStrongestFire().label, 'Fire · FRP 1520 MW');
+  } finally {
+    h.cleanup();
+    setLocale('en');
+  }
+});
+
 test('a click on neither sprite nor card clears without moving the camera', () => {
   const h = harness({ picked: { primitive: {}, content: {}, featureId: 0 } });
   try {