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/layers/satellites/controls.js

@@ -4,6 +4,7 @@ import {
   satelliteClassLegend,
 } from '../../data/satelliteClass.js';
 import * as Cesium from 'cesium';
+import { t } from '../../i18n/index.js';
 import { ISS_NORAD, POINT_STYLES } from './policy.js';
 
 export function createControls({ state: layerState, services, parts, source }) {
@@ -493,19 +494,22 @@ export function createControls({ state: layerState, services, parts, source }) {
       const active =
         layerState._params.catalog === 'dense' &&
         layerState._denseStatus === 'ready';
-      let title =
-        'Add the full Starlink broadband shell (thousands of extra points)';
-      if (loading) title = 'Loading the Starlink shell…';
+      let title = t('layers.satellites.denseTitleAdd');
+      if (loading) title = t('layers.satellites.denseTitleLoading');
       else if (failed)
-        title = `Starlink ${layerState._denseError || 'load failed'} — click to retry`;
-      else if (active)
-        title =
-          'Showing the full Starlink shell — click for the core catalog only';
+        title = t('layers.satellites.denseTitleFailed', {
+          detail: layerState._denseError || t('layers.satellites.loadFailed'),
+        });
+      else if (active) title = t('layers.satellites.denseTitleActive');
       return {
         chips: [
           {
             id: 'catalog',
-            label: loading ? 'DENSE ···' : failed ? 'DENSE ✕' : 'DENSE',
+            label: loading
+              ? t('layers.satellites.denseChipLoading')
+              : failed
+                ? t('layers.satellites.denseChipFailed')
+                : t('layers.satellites.denseChip'),
             active,
             busy: loading,
             disabled: loading,