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/satelliteClass.js

@@ -17,6 +17,8 @@
  * for), then the constellations users can actually name, then the grab-bag.
  */
 
+import { t } from '../i18n/index.js';
+
 /**
  * Class registry. `label` is the card/legend token, `color` the point color,
  * `blurb` the plain-language gloss for the legend tooltip.
@@ -77,6 +79,32 @@ export const SATELLITE_CLASS_ORDER = Object.freeze([
   'comms',
 ]);
 
+// Display keys for the class table above: `label`/`blurb` stay the English
+// source-of-truth tokens (tests read them), while the card and legend accessors
+// translate through these keys at the presentation boundary.
+const CLASS_DISPLAY_KEYS = Object.freeze({
+  station: Object.freeze({
+    label: 'layers.satellites.class.station',
+    blurb: 'layers.satellites.class.stationBlurb',
+  }),
+  nav: Object.freeze({
+    label: 'layers.satellites.class.nav',
+    blurb: 'layers.satellites.class.navBlurb',
+  }),
+  geo: Object.freeze({
+    label: 'layers.satellites.class.geo',
+    blurb: 'layers.satellites.class.geoBlurb',
+  }),
+  visual: Object.freeze({
+    label: 'layers.satellites.class.visual',
+    blurb: 'layers.satellites.class.visualBlurb',
+  }),
+  comms: Object.freeze({
+    label: 'layers.satellites.class.comms',
+    blurb: 'layers.satellites.class.commsBlurb',
+  }),
+});
+
 /**
  * CelesTrak group tag → { class, subtype }. Subtype names the specific
  * constellation so the card can read "NAV · GPS" rather than a bare "NAV".
@@ -139,7 +167,7 @@ export function satelliteClassColor(group) {
  */
 export function satelliteClassLabel(group, { isIss = false } = {}) {
   const { klass, subtype } = satelliteClassOf(group, { isIss });
-  const base = SATELLITE_CLASSES[klass].label;
+  const base = t(CLASS_DISPLAY_KEYS[klass].label);
   return subtype ? `${base} · ${subtype}` : base;
 }
 
@@ -180,11 +208,12 @@ export function satelliteClassLegend(counts) {
     const count = counts?.[klass];
     if (!(count > 0)) continue;
     const spec = SATELLITE_CLASSES[klass];
+    const display = CLASS_DISPLAY_KEYS[klass];
     result.push({
       klass,
-      label: spec.label,
+      label: t(display.label),
       color: spec.color,
-      blurb: spec.blurb,
+      blurb: t(display.blurb),
       count,
     });
   }