i18n: fix review findings and polish ru/es strings

Fixes the 51 P0–P2 findings from the full review of the i18n branch and
the issues found while checking every new string on screen in ru and es.

- Translate errors and statuses that still reached ru/es in English:
  feed and tile errors, provider statuses, the ALPR chip, the traffic
  mode chip, voice plan step labels, fire feed values, receiver bands,
  scene save reasons and the Cesium attribution link.
- Show preset city names in the UI language (src/ui/placeNames.js);
  data and everything sent to the model stay English.
- Share layer names between the layer panel, HUD and voice card
  (src/ui/layerNames.js).
- Keep long ru/es strings whole: voice card error lines, analyst
  titles, the voice tier status, the Nepal evidence button, the ALPR
  retry chip. English layout is unchanged.
- Ask before a language switch drops unsaved work.
- Catalog fixes: glossary terms (пуск, пресет), gender agreement and
  consistent "peticiones" in es, fewer calques in both languages.
- Fix English text that was itself wrong (e.g. "Exit cockpit to fly to
  a weather", raw tool ids in voice plan steps).

Catalogs: es/ru 2535 messages each, complete.

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

src/data/vesselLabels.js

@@ -15,6 +15,8 @@ export const VESSEL_DEFAULT_LABEL_LIMIT = 900;
 export const VESSEL_OVERLAY_MAX_COHORT = VESSEL_DEFAULT_LABEL_LIMIT;
 /** Existing ambient vessel-card distance fade reaches zero at 5000 km. */
 export const VESSEL_CARD_FADE_DISTANCE_M = 5_000_000;
+/** Share of VESSEL_CARD_FADE_DISTANCE_M at which ambient cards begin to fade. */
+export const VESSEL_CARD_FADE_START_RATIO = 0.7;
 
 /**
  * AIS type family → chevron hue + card accent. Single source of truth for
@@ -187,7 +189,7 @@ export function applyVesselOverlayPolicy(
     verticalOnly: !selected,
     viewportMargin: 4,
     maxDistance: selected ? Number.POSITIVE_INFINITY : fadeDistance,
-    distanceFadeStartRatio: 0.7,
+    distanceFadeStartRatio: VESSEL_CARD_FADE_START_RATIO,
     edgeFade: 'keyhole',
     horizonCull: true,
     terrainOcclusion: false,