fix(local-adsb): show a 359.7° track as TRK 0°, not TRK 360° (#1396)

Wrap rounded local ADS-B track labels at north.

Contribution by @rudycelekli.

changelog.d/1396-local-adsb-track-north.md

@@ -0,0 +1,3 @@
+- Show a locally heard aircraft tracking 359.5° or more as TRK 0°. The Local
+  ADS-B card rounded the track without wrapping, so 359.7° read "TRK 360°"
+  (Rudy Celekli, @rudycelekli, #1396).

docs/CURRENT-STATE.md

@@ -5994,6 +5994,8 @@ callsign, class and category, adsbdb operator/type and a plausible route when
 known, altitude, ground speed, track, vertical rate, position age, message
 count, "Heard by your receiver"); markers are not camera-followed. Positioned
 aircraft join detection boxes, labelled only with a decoded callsign.
+The card's `TRK` label wraps after rounding to whole degrees, so a track of
+359.5° displays as `TRK 0°` rather than `TRK 360°`.
 
 Receivers publish one record shape from `src/sources/adsbRecords.js`
 (`icao`, `callsign`, `category`, `onGround`, `lat`, `lon`, `altitudeFt`,

src/layers/localAdsb/card.js

@@ -152,7 +152,7 @@ export function localAdsbCardModel(
       t('ALT {altitude} FT · GS {speed} KT · TRK {track}', {
         altitude: grouped(altitude),
         speed: speed === null ? DASH : speed,
-        track: track === null ? DASH : `${track}°`,
+        track: track === null ? DASH : `${track % 360}°`,
       }),
       vertical === null
         ? t('V/S {rate}', { rate: DASH })

src/layers/localAdsb/card.test.mjs

@@ -0,0 +1,19 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { setLocale } from '../../i18n/index.js';
+import { localAdsbCardModel } from './card.js';
+
+test('a track of 359.7° reads TRK 0°, not TRK 360°', () => {
+  setLocale('en');
+  const { details } = localAdsbCardModel(
+    {
+      icao: 'abc123',
+      altitudeFt: 12500,
+      groundSpeedKt: 240,
+      trackDeg: 359.7,
+      lastPositionAt: 1000,
+    },
+    5000,
+  );
+  assert.equal(details[1], 'ALT 12,500 FT · GS 240 KT · TRK 0°');
+});