wip(mobile): checkpoint the globe engine and vision mockup in progress

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01VVYRAqiQj9Y1V9ZfG1RcDH

mobile/globe/layers/air.js

@@ -176,6 +176,7 @@ export class AircraftLayer extends Layer {
         .join(' · '),
       lon,
       lat,
+      ...(r.emergency ? { labelDetail: `SQ ${r.squawk}` } : {}),
       meta: {
         layer: this.id,
         icao24: r.id,