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/data/militaryAwareness.test.mjs

@@ -301,7 +301,7 @@ test('Contacts continuation target is the visible explanatory note', () => {
   const source = readLayerSource(new URL('./militaryAwareness.js', import.meta.url));
   assert.match(
     source,
-    /<p class="military-awareness-note" tabindex="-1" data-awareness-focus-continuation>Open-source mapped\/observed context\./,
+    /<p class="military-awareness-note" tabindex="-1" data-awareness-focus-continuation>\$\{t\('layers\.awareness\.note'\)\}<\/p>/,
   );
   assert.doesNotMatch(source, /<span[^>]*data-awareness-focus-continuation/);
 });