i18n: fix the final pre-merge review findings

Fixes the P1 and the confirmed P2 findings of the final review of the
i18n branch.

- CI: the air-quality model no longer imports i18n (portable module),
  so check:boundaries passes again.
- Air quality layer: named in the layer panel, HUD and voice; its
  Weather card, bands and errors translate. A test keeps the layer-name
  table in step with the layer registry.
- Layer statuses that still reached ru/es in English: GNSS, CelesTrak,
  Transit loading and feed errors, launches, perimeters, ALPR, ECCC,
  wind "field unavailable", Local ADS-B streaming lines.
- Voice and HUD: preset ids show city names ("Fly to San Francisco"),
  the HUD city translates, cockpit refusals cover frame, aircraft and
  satellite; empty Transit notes translate on the analyst card.
- tn() keeps a caller's formatted count ("12,345 map objects").
- Cyber HUD: the language button no longer covers the bottom-right
  card or the cockpit position readout.
- CCTV buttons wrap only in non-English locales; English layout matches
  main again.
- Switching language asks first when Provider Settings holds unsaved
  keys.

Catalogs: es/ru 2611 messages each, complete.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/layers/gnss/index.js

@@ -31,6 +31,14 @@ const LEVEL_LABELS = Object.freeze({
   high: msg('Low-accuracy score > 10%'),
 });
 
+/** A source failure (English data, source.js) in the UI language. */
+function shownSourceError(text) {
+  const http = /^GNSS feed unavailable \(HTTP (\d{3})\)$/.exec(text);
+  return http
+    ? t('GNSS feed unavailable (HTTP {status})', { status: http[1] })
+    : translateKnown(text);
+}
+
 /** Degrees at the centre of the current view, or null before the camera settles. */
 export function defaultGnssViewAnchor(viewer) {
   const canvas = viewer?.scene?.canvas;
@@ -377,7 +385,7 @@ export function createGnssIntegrityLayer({
             'Regional sample · 250 nm radius · cells from visited views over 30 min',
           ) +
           (_lastError && _retryAt
-            ? ` · ${translateKnown(_lastError)} · ${
+            ? ` · ${shownSourceError(_lastError)} · ${
                 _retryAt <= 8640000000000000
                   ? t('Retrying automatically at {time} UTC', {
                       time: new Date(_retryAt).toISOString().slice(11, 19),