Merge origin/main: GNSS integrity, geo file import and cockpit emergencies meet i18n

Conflicts resolved by keeping both sides: the Events group gains
gnss-integrity with a translated label, the cockpit aircraft line shows
main's transponder emergency through a localized formatter (cockpitMath.js
stays i18n-free, like the Context scope line), and the boundary lists keep
both the i18n modules and main's new data modules.

Main's new UI is translated into es and ru: the GNSS Integrity row, legend
and notes; geo file import (button, hints, list actions, every import
error, with numbers passed as placeholders); transponder status names.
Also formats kartaview/viewer.js so format:check passes.

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

src/ui/layerPanel.js

@@ -44,6 +44,7 @@ const LAYER_NAME_KEYS = Object.freeze({
   transit: msg('Transit'),
   'recent-imagery': msg('Recent Imagery'),
   'fire-perimeters': msg('Fire Perimeters'),
+  'gnss-integrity': msg('GNSS Integrity'),
   wind: msg('Wind'),
   'weather-radar': msg('Rain radar'),
   'weather-satellite': msg('Satellite clouds'),
@@ -96,7 +97,13 @@ const PANEL_GROUPS = [
   },
   {
     label: msg('Events'),
-    ids: ['rocket-launches', 'earthquakes', 'local-firms', 'fire-perimeters'],
+    ids: [
+      'rocket-launches',
+      'earthquakes',
+      'local-firms',
+      'fire-perimeters',
+      'gnss-integrity',
+    ],
   },
   {
     label: msg('Weather'),