fix(i18n): toast, boot labels and AI tool text found in review

- The Space Missions cancellation failure toast read "[object Object]" in
  every language: the options object was passed as the message. The English
  message is the second argument again, the translation the third.
- Header text is translated before panel chrome builds its collapse labels,
  so the dock and display toggles no longer read "Expand VISUAL PRESETS" in
  another language.
- The voice "show data layers" result keeps the English layer name
  (row data-layer-name), not the translated row text.
- The Google 3D unavailable reason is translated in full.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/i18n/locales/ru.json

@@ -2060,5 +2060,7 @@
   "{duration}s + {hold}s": "{duration} с + {hold} с",
   "Configured Source": "Настроенный источник",
   "subject": "объект",
-  "{value}m": "{value} м"
+  "{value}m": "{value} м",
+  "Google 3D tiles unavailable — check the key's API restrictions, quota, or network": "Тайлы Google 3D недоступны — проверьте ограничения API ключа, квоту или сеть",
+  "Needs {envVars} — add it in Provider Settings — or a Cesium ion token for the ion-hosted route": "Нужен {envVars} — добавьте его в «Настройках провайдеров» — или токен Cesium ion для маршрута через ion"
 }