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/data/layerState.js

@@ -610,6 +610,11 @@ export const LAYER_STATE_REGISTRY = Object.freeze([
     disposition: 'enabled+options',
     optionOwner: 'flights',
   }),
+  Object.freeze({
+    id: 'gnss-integrity',
+    token: '3',
+    disposition: 'enabled-only',
+  }),
   Object.freeze({ id: 'local-dams', token: 'q', disposition: 'enabled-only' }),
   Object.freeze({
     id: 'local-datacenters',