feat(i18n): presentation extraction — t() call sites, data-i18n templates, locale selector

Route every application-owned presentation string through the i18n
core: t() call sites across the app/layers/ui/data/voice surfaces,
data-i18n* attributes in the src/ui/templates/*.html markup (applied at
boot by applyDocumentTranslations from src/standalone/application.js),
and the dock locale selector (runtime-rendered from the offered pair —
a single EN button while only English ships).

Rebased onto current main, where the extraction follows the module
splits: the shell wiring now lands in the owner modules
(panelChrome, visualSettings, locationNavigation, shareRestoration,
shellFeedback, applicationShell) and the voice status corpus in the
realtime* modules; scene status lives in director.js +
playbackAdapter.js.

Modules shared with the node runtime (loadingFeedback,
installationFeedback, regionalModel, keySetupCore, vessels ingestion)
stay environment-neutral English and localize at their browser render
sites (chip maps in shellFeedback/installations controls, the weather
table in cockpitBriefing, keySetupRequirementEnvVars compositions), so
the package-boundary graph stays clean; the browser boundary groups
now own the i18n modules they reach (scripts/package-boundaries.json).

src/ui/shareRestoration.js

@@ -1,6 +1,7 @@
 import { LayerStateCoordinator } from '../data/layerState.js';
 import { stampInitialShareGesture } from '../navigationPolicy.js';
 import { canPresentDeferredStatusNotice } from '../loadingFeedback.js';
+import { t } from '../i18n/index.js';
 import { UiLifetime } from './uiLifetime.js';
 
 /** Own initial share restoration, durable layer state and restoration notices. */
@@ -188,9 +189,13 @@ export class ShareRestoration {
     if (result.classification === 'pending') {
       this._shareTrackingNoticeGeneration += 1;
       this._shareTrackingAcquiringKey = trackingKey;
-      this.showStatus('ACQUIRING', {
+      this.showStatus(t('cockpit.status.acquiring'), {
         state: 'acquiring',
-        detail: `SHARED ${String(result.label || 'SUBJECT').toUpperCase()}`,
+        detail: t('cockpit.status.sharedSubjectDetail', {
+          subject: String(
+            result.label || t('cockpit.status.subjectFallback'),
+          ).toUpperCase(),
+        }),
         persistent: true,
       });
       return;
@@ -214,13 +219,13 @@ export class ShareRestoration {
     const noticeGeneration = ownsAcquiringNotice
       ? this._shareTrackingNoticeGeneration
       : ++this._shareTrackingNoticeGeneration;
-    const subject = result.label || 'entity';
+    const subject = result.label || t('cockpit.status.subjectFallback');
     const message =
       result.classification === 'expired'
-        ? `Shared ${subject} follow expired`
+        ? t('cockpit.status.sharedFollowExpired', { subject })
         : result.classification === 'source-unavailable'
-          ? `Shared ${subject} could not be restored — feed unavailable`
-          : `Shared ${subject} is unavailable`;
+          ? t('cockpit.status.sharedRestoreFailed', { subject })
+          : t('cockpit.status.sharedUnavailable', { subject });
     const showAfterStartupCover = () => {
       this._lifetime.frame(() => {
         if (