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/cockpitPresentation.js

@@ -1,4 +1,6 @@
 /** Pure formatting and fixed presentation constants used by Cockpit components. */
+import { t } from '../i18n/index.js';
+
 export const COCKPIT_HEADING_SLEW_DPS = 28;
 
 export const COCKPIT_FORWARD_OFFSET_M = 7;
@@ -44,20 +46,22 @@ export const COCKPIT_REGIONAL_REFRESH_DISTANCE_M = 25_000;
 export const COCKPIT_BRIEF_PAGES = [
   {
     id: 'signals',
-    kicker: 'LIVE SIGNALS',
-    subtitle: 'OBSERVED / MAPPED PINGS',
-    source: 'SOURCE-BACKED EVENTS · NO SYNTHETIC NEWS',
+    kickerKey: 'cockpit.brief.kicker',
+    subtitleKey: 'cockpit.brief.subtitle',
+    sourceKey: 'cockpit.brief.sourceNote',
   },
   {
     id: 'news',
-    kicker: 'REGIONAL NEWS',
-    subtitle: 'LATEST LOCATION-MATCHED REPORTING',
+    kickerKey: 'cockpit.brief.kickerNews',
+    subtitleKey: 'cockpit.brief.subtitleNews',
+    // RSS provider attribution is a keep-English boundary string.
     source: 'GOOGLE NEWS RSS · LOCATION QUERY · RECENT',
   },
   {
     id: 'local',
-    kicker: 'LOCAL INFO',
-    subtitle: 'PLACE / CONDITIONS / POSITION',
+    kickerKey: 'cockpit.brief.kickerLocal',
+    subtitleKey: 'cockpit.brief.subtitleLocal',
+    // Data-source attribution is a keep-English boundary string.
     source: 'NATURAL EARTH · OPEN-METEO · UTC',
   },
 ];
@@ -80,15 +84,17 @@ export function isRenderedOnScreen(element) {
 
 export function formatCockpitBriefAge(value) {
   const timestamp = Date.parse(value);
-  if (!Number.isFinite(timestamp)) return 'TIME UNKNOWN';
+  if (!Number.isFinite(timestamp)) return t('cockpit.brief.age.timeUnknown');
   const minutes = Math.max(0, Math.round((Date.now() - timestamp) / 60_000));
-  if (minutes < 60) return `${minutes}M AGO`;
+  if (minutes < 60) return t('cockpit.brief.age.minutes', { count: minutes });
   const hours = Math.round(minutes / 60);
-  return hours < 48 ? `${hours}H AGO` : `${Math.round(hours / 24)}D AGO`;
+  return hours < 48
+    ? t('cockpit.brief.age.hours', { count: hours })
+    : t('cockpit.brief.age.days', { count: Math.round(hours / 24) });
 }
 
 export function formatCockpitWindDirection(value) {
-  if (!Number.isFinite(value)) return 'DIR UNKNOWN';
+  if (!Number.isFinite(value)) return t('cockpit.brief.wind.dirUnknown');
   const labels = ['N', 'NE', 'E', 'SE', 'S', 'SW', 'W', 'NW'];
   const normalized = ((value % 360) + 360) % 360;
   return `${labels[Math.round(normalized / 45) % labels.length]} · ${Math.round(normalized)}°`;