refactor(cockpit): lastAircraftInfo is lastSubjectInfo

It holds the ridden vessel on a bridge, and the radar range button reads a
vessel from it.

src/ui/cockpitBriefing.js

@@ -85,11 +85,11 @@ export function relocalizeBrief() {
   Object.assign(this.brief, cycleWords(this.briefAutoRotateEnabled));
   this.showBriefPage(this.briefPageIndex);
   if (this.regionalBrief)
-    this.renderRegionalBrief(this.regionalBrief, this.lastAircraftInfo);
+    this.renderRegionalBrief(this.regionalBrief, this.lastSubjectInfo);
   else if (this.brief.news.state)
     this.renderRegionalBriefStatus(
       this.brief.news.state,
-      this.lastAircraftInfo,
+      this.lastSubjectInfo,
     );
 }
 

src/ui/cockpitController.js

@@ -217,7 +217,8 @@ export class CockpitViewController {
     this.contextView = createContextState();
     this.brief = createBriefState();
     this.briefTimer = null;
-    this.lastAircraftInfo = null;
+    // The last aircraft or vessel the HUD drew.
+    this.lastSubjectInfo = null;
     this.regionalBrief = null;
     this.regionalBriefAnchor = null;
     this.regionalBriefFetchedAt = 0;
@@ -399,8 +400,8 @@ export class CockpitViewController {
   /** Step the bridge radar to its next range and redraw it at once. */
   cycleRadarRange() {
     this.radarRangeNm = nextRadarRange(this.radarRangeNm);
-    if (this.active && this.subjectKind === 'vessel' && this.lastAircraftInfo)
-      this.updateRadar(this.lastAircraftInfo);
+    if (this.active && this.subjectKind === 'vessel' && this.lastSubjectInfo)
+      this.updateRadar(this.lastSubjectInfo);
   }
   presentLook() {
     return presentLook.call(this);
@@ -555,10 +556,10 @@ export class CockpitViewController {
     this.relocalizeBrief();
     this.publishVision(createVisionState(this.visionMode));
     this.routeSignature = null;
-    if (this.active && this.lastAircraftInfo) {
+    if (this.active && this.lastSubjectInfo) {
       this.rewordingSignals = true;
       try {
-        this.updateHud(this.lastAircraftInfo, performance.now(), true);
+        this.updateHud(this.lastSubjectInfo, performance.now(), true);
       } finally {
         this.rewordingSignals = false;
       }

src/ui/cockpitInstruments.js

@@ -142,7 +142,7 @@ export function updateHud(
     updateVesselHud.call(this, info, nowMs, forceContext);
     return;
   }
-  this.lastAircraftInfo = info;
+  this.lastSubjectInfo = info;
   const view = this.instruments;
   view.kind = 'aircraft';
   view.trackSource = null;
@@ -247,7 +247,7 @@ export function updateHud(
  * Signals stay aircraft-only, so the Contact card is withdrawn.
  */
 function updateVesselHud(info, nowMs, forceContext) {
-  this.lastAircraftInfo = info;
+  this.lastSubjectInfo = info;
   const view = this.instruments;
   view.kind = 'vessel';
   view.trackSource = info.trackSource ?? null;