fix(transit): count a 90-second report as one minute

The card kept seconds through 89s, then rounded 90s up to 2 minutes.

src/layers/transit/policy.js

@@ -442,10 +442,12 @@ export function buildTransitSelectionCopy(
       ? entry.sample.latestReportAgeMs
       : vehicleFixAgeMs(record, nowMs, fetchedAtMs)) / 1000,
   );
+  // Seconds through 89s, then whole minutes. Rounding 90s up would skip
+  // "1 min" and call a minute-and-a-half-old report two minutes old.
   const reported =
     ageS < 90
       ? t('Reported {seconds} s ago', { seconds: ageS })
-      : t('Reported {minutes} min ago', { minutes: Math.round(ageS / 60) });
+      : t('Reported {minutes} min ago', { minutes: Math.floor(ageS / 60) });
   // A time the feed did not give for THIS vehicle is labelled, so the card
   // never presents a borrowed or inferred time as the vehicle's own report.
   const ownTime =

src/layers/transit/selectionCopy.i18n.test.mjs

@@ -39,6 +39,26 @@ test('en: the copy is unchanged with and without the i18n t()', () => {
   ]);
 });
 
+test('a report 90 seconds old reads as 1 minute, not 2', () => {
+  setLocale('en');
+  const line = (ageMs) =>
+    buildTransitSelectionCopy(
+      feed,
+      {
+        id: 'age',
+        lat: 1,
+        lon: 1,
+        timestamp: Math.floor((now - ageMs) / 1000),
+        timestampSource: 'vehicle',
+      },
+      'bus',
+      now,
+    ).details[1];
+  assert.equal(line(89_000), 'Reported 89 s ago');
+  assert.equal(line(90_000), 'Reported 1 min ago');
+  assert.equal(line(120_000), 'Reported 2 min ago');
+});
+
 for (const locale of ['es', 'ru']) {
   test(`${locale}: the Transit card is in the UI language`, () => {
     setLocale(locale);