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]>

CHANGELOG.md

@@ -157,6 +157,16 @@
 
 ## [Unreleased]
 
+- Flights and Military Flights highlight emergency transponder broadcasts in
+  fleet billboards, 3D models and Cockpit contacts. Colors update when a status
+  starts or clears. Emergency squawks outrank ADS-B priority statuses; GEV
+  reports minimum fuel and lifeguard without red tint. Cockpit names the code
+  or ADS-B status, and analyst/voice results retain broadcast provenance and
+  the latest known contact time. One omitted ADS-B status poll during a source
+  switch may retain the previous status if the squawk is unchanged; an explicit
+  clear takes effect immediately. Broadcasts are not confirmed incidents.
+  Contributed by [Leo Pechnicki](https://github.com/leopechnicki) (#856).
+
 - Street Level: KartaView is the third provider, keyless. Light its chip
   (purple; off by default, one provider at a time) and zoom in below about
   6 km: the lines are the streets KartaView has photos of (z13–14 tiles from
@@ -240,6 +250,26 @@
   largest cities) and `CCTV_VEGVESEN_VIDEO=0` keeps stills only. Attributed
   under NLOD 2.0.
 
+- Import your own GeoJSON, KML, KMZ and GPX files from DISPLAY or by dropping
+  them onto the app. Show, hide, fly to or remove each file for the session.
+  GeoJSON/GPX draw on the ground; KML retains its styles and explicit heights.
+  Large repeated-style exports use shared local pins, while recorded track
+  vertices and segment gaps stay intact. Imports respect newer camera gestures,
+  leave the shared clock alone, and report malformed or oversized files.
+  File bytes stay on the device; rendered overlays may appear in shared map
+  screenshots. Thanks to [Chase Mills](https://github.com/kapturner) (#925).
+
+- GNSS Integrity (Events, voice-addressable, share token `3`) draws navigation
+  accuracy scores from a keyless regional adsb.lol sample; aircraft-level analyst
+  queries are unavailable for these aggregate cells. Cells do not intercept
+  map clicks. Pan/zoom refreshes automatically; feed failures retain the display
+  and explain the next retry. Aircraft-reported quality includes MLAT-positioned
+  contacts after GPS loss, excludes TIS-B/MLAT-derived quality, and locates GPS-loss
+  evidence at the last good GNSS position when available. Scores discount one
+  bad aircraft per cell and retain 30 minutes of visited-view evidence; they
+  do not confirm jamming. See [method and limits](DATA_SOURCES.md#gnss-integrity).
+  Contributed by [Leo Pechnicki](https://github.com/leopechnicki) (#855).
+
 - Live HLS cameras play on a page opened over plain HTTP from another machine
   (`HOST=0.0.0.0`). The client lease id came from `crypto.randomUUID`, which
   browsers only expose in secure contexts, so starting a live feed threw