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/es.json

@@ -2028,5 +2028,7 @@
   "{duration}s + {hold}s": "{duration} s + {hold} s",
   "Configured Source": "Fuente configurada",
   "subject": "sujeto",
-  "{value}m": "{value} m"
+  "{value}m": "{value} m",
+  "Google 3D tiles unavailable — check the key's API restrictions, quota, or network": "Teselas de Google 3D no disponibles: revisa las restricciones de API de la clave, la cuota o la red",
+  "Needs {envVars} — add it in Provider Settings — or a Cesium ion token for the ion-hosted route": "Necesita {envVars} — añádela en Ajustes de proveedores — o un token de Cesium ion para la ruta alojada en ion"
 }

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"
 }

src/maps/availability.js

@@ -14,7 +14,12 @@ import { t } from '../i18n/index.js';
  */
 export function photorealUnavailableReason(hasCredentials) {
   if (hasCredentials)
-    return "Google 3D tiles unavailable — check the key's API restrictions, quota, or network";
+    return t(
+      "Google 3D tiles unavailable — check the key's API restrictions, quota, or network",
+    );
   const envVars = keySetupRequirementEnvVars('google-maps');
-  return `${t('Needs {envVars} — add it in Provider Settings', { envVars })} — or a Cesium ion token for the ion-hosted route`;
+  return t(
+    'Needs {envVars} — add it in Provider Settings — or a Cesium ion token for the ion-hosted route',
+    { envVars },
+  );
 }

src/ui/applicationShell.js

@@ -569,10 +569,11 @@ export class StyleManager extends ShellFacade {
     });
     this._initUI();
     this._initMapStackControl();
+    // Headers first: panel chrome builds its toggle labels from them.
+    this._applyRuntimeStaticHeaderText();
     this._initPanelChrome();
     this._initLocaleSelector();
     this._sizeDisplayLabelColumn();
-    this._applyRuntimeStaticHeaderText();
     this._initLeftPanelAdaptiveLayout();
     this._initRightPanelAdaptiveLayout();
     this._initRadioPanel();

src/ui/contextLayerChanges.js

@@ -69,6 +69,7 @@ export function _handleContextLayerChange(change) {
               );
               return true;
             },
+            'Space Missions cancellation could not restore the previous layer state', // i18n-ignore: English message; the toast shows localizedMessage
             {
               localizedMessage: t(
                 'Space Missions cancellation could not restore the previous layer state',

src/ui/layerPanel.js

@@ -129,6 +129,10 @@ const PANEL_LABELS = {
   'local-firms': msg('Active Fires'),
 };
 
+function englishPanelLabel(layer) {
+  return PANEL_LABELS[layer.id] || LAYER_NAME_KEYS[layer.id] || layer.name;
+}
+
 // The panel's own English names win, as before i18n; module names otherwise.
 function panelLabel(layer) {
   if (PANEL_LABELS[layer.id]) return t(PANEL_LABELS[layer.id]);
@@ -378,6 +382,8 @@ export class LayerPanel {
       const row = document.createElement('div');
       row.className = 'data-toggle-row';
       row.dataset.layerId = layer.id;
+      // English name for voice tools, which must not receive translated text.
+      row.dataset.layerName = englishPanelLabel(layer);
 
       const topRow = document.createElement('div');
       topRow.className = 'data-toggle-top';

src/voice/gevActions.js

@@ -3003,7 +3003,11 @@ function focusDataLayerRow(layerId) {
   void row.offsetWidth;
   row.classList.add('gev-voice-focus');
   window.setTimeout(() => row.classList.remove('gev-voice-focus'), 3000);
-  const name = row.querySelector('.data-name')?.textContent?.trim() || layerId;
+  // The English name: tool results stay English whatever the UI language.
+  const name =
+    row.dataset.layerName ||
+    row.querySelector('.data-name')?.textContent?.trim() ||
+    layerId;
   return { id: layerId, name };
 }