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/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';