Say why Transit and Bike Share rows are empty outside coverage

Over a city with no feed or system (London, Tokyo) both rows read
"ON · — · never", the same as a feed that never answered. Transit already
computed a coverage note but put it only in `coverage`, which the row does
not show; Bike Share reported nothing at all.

Both layers now report a `zoom-in` guidance status with a `statusMessage`:
"Fly below 3,000 km to a covered region" / "No feed here yet · N regions
available" for Transit, and "Fly below 48 km to a covered city" / "No bike
share here yet · N systems available" for Bike Share. A loading or failed
Bike Share city keeps its own text. Leaving coverage clears the layer's
last-update time, so the row no longer dates data it no longer draws.

The coverage-note translations move from the voice card into
`translateStatusMessage` (ui/statusText.js), which the Layers row and the
voice card now share.

src/i18n/locales/ar.json

@@ -2912,6 +2912,15 @@
     "many": "لا مصدر بيانات هنا بعد · {n} منطقة متاحة",
     "other": "لا مصدر بيانات هنا بعد · {n} منطقة متاحة"
   },
+  "Fly below {km} km to a covered city": "انخفض إلى ما دون {km} كم فوق مدينة مغطاة",
+  "No bike share here yet · {n} systems available": {
+    "zero": "لا دراجات مشتركة هنا بعد · {n} نظام متاح",
+    "one": "لا دراجات مشتركة هنا بعد · نظام واحد متاح ({n})",
+    "two": "لا دراجات مشتركة هنا بعد · نظامان متاحان ({n})",
+    "few": "لا دراجات مشتركة هنا بعد · {n} أنظمة متاحة",
+    "many": "لا دراجات مشتركة هنا بعد · {n} نظامًا متاحًا",
+    "other": "لا دراجات مشتركة هنا بعد · {n} نظام متاح"
+  },
   "degraded": "متدهور",
   "stale": "متقادم",
   "partial": "جزئي",

src/i18n/locales/de.json

@@ -2662,6 +2662,11 @@
     "one": "Hier noch kein Feed · {n} Region verfügbar",
     "other": "Hier noch kein Feed · {n} Regionen verfügbar"
   },
+  "Fly below {km} km to a covered city": "Unter {km} km Höhe zu einer abgedeckten Stadt fliegen",
+  "No bike share here yet · {n} systems available": {
+    "one": "Hier noch kein Bikesharing · {n} System verfügbar",
+    "other": "Hier noch kein Bikesharing · {n} Systeme verfügbar"
+  },
   "degraded": "eingeschränkt",
   "stale": "veraltet",
   "partial": "teilweise",

src/i18n/locales/es.json

@@ -2821,6 +2821,12 @@
     "many": "Aún no hay fuente aquí · {n} de regiones disponibles",
     "other": "Aún no hay fuente aquí · {n} regiones disponibles"
   },
+  "Fly below {km} km to a covered city": "Desciende por debajo de {km} km sobre una ciudad con cobertura",
+  "No bike share here yet · {n} systems available": {
+    "one": "Aún no hay bicis compartidas aquí · {n} sistema disponible",
+    "many": "Aún no hay bicis compartidas aquí · {n} de sistemas disponibles",
+    "other": "Aún no hay bicis compartidas aquí · {n} sistemas disponibles"
+  },
   "Wind speed field unavailable": "Campo de velocidad del viento no disponible",
   "Decoder feeds": "Fuentes del decodificador",
   "WebUSB + decoder feeds": "WebUSB + fuentes del decodificador",

src/i18n/locales/fr.json

@@ -2531,6 +2531,12 @@
     "many": "Pas encore de flux ici · {n} de régions disponibles",
     "other": "Pas encore de flux ici · {n} régions disponibles"
   },
+  "Fly below {km} km to a covered city": "Descendez sous {km} km au-dessus d'une ville couverte",
+  "No bike share here yet · {n} systems available": {
+    "one": "Pas encore de vélos partagés ici · {n} système disponible",
+    "many": "Pas encore de vélos partagés ici · {n} de systèmes disponibles",
+    "other": "Pas encore de vélos partagés ici · {n} systèmes disponibles"
+  },
   "degraded": "dégradé",
   "stale": "obsolète",
   "partial": "partiel",

src/i18n/locales/it.json

@@ -2531,6 +2531,12 @@
     "many": "Ancora nessun feed qui · {n} di regioni disponibili",
     "other": "Ancora nessun feed qui · {n} regioni disponibili"
   },
+  "Fly below {km} km to a covered city": "Scendi sotto {km} km su una città coperta",
+  "No bike share here yet · {n} systems available": {
+    "one": "Ancora nessun bike sharing qui · {n} sistema disponibile",
+    "many": "Ancora nessun bike sharing qui · {n} di sistemi disponibili",
+    "other": "Ancora nessun bike sharing qui · {n} sistemi disponibili"
+  },
   "degraded": "degradato",
   "stale": "obsoleto",
   "partial": "parziale",

src/i18n/locales/ja.json

@@ -2401,6 +2401,10 @@
   "No feed here yet · {n} regions available": {
     "other": "ここにはまだフィードがありません · 利用可能な地域 {n}か所"
   },
+  "Fly below {km} km to a covered city": "{km} km未満まで高度を下げ、カバー範囲内の都市へ移動してください",
+  "No bike share here yet · {n} systems available": {
+    "other": "ここにはまだシェアサイクルがありません · 利用可能なシステム {n}件"
+  },
   "degraded": "性能低下",
   "stale": "更新遅延",
   "partial": "部分的",

src/i18n/locales/pt.json

@@ -2533,6 +2533,12 @@
     "many": "Ainda não há feed aqui · {n} de regiões disponíveis",
     "other": "Ainda não há feed aqui · {n} regiões disponíveis"
   },
+  "Fly below {km} km to a covered city": "Desça abaixo de {km} km sobre uma cidade com cobertura",
+  "No bike share here yet · {n} systems available": {
+    "one": "Ainda não há bicicletas compartilhadas aqui · {n} sistema disponível",
+    "many": "Ainda não há bicicletas compartilhadas aqui · {n} de sistemas disponíveis",
+    "other": "Ainda não há bicicletas compartilhadas aqui · {n} sistemas disponíveis"
+  },
   "degraded": "degradado",
   "stale": "desatualizado",
   "partial": "parcial",

src/i18n/locales/ru.json

@@ -2884,6 +2884,13 @@
     "many": "Здесь пока нет потока данных · доступно {n} регионов",
     "other": "Здесь пока нет потока данных · доступно {n} региона"
   },
+  "Fly below {km} km to a covered city": "Опуститесь ниже {km} км над городом с покрытием",
+  "No bike share here yet · {n} systems available": {
+    "one": "Здесь пока нет проката велосипедов · доступна {n} система",
+    "few": "Здесь пока нет проката велосипедов · доступны {n} системы",
+    "many": "Здесь пока нет проката велосипедов · доступно {n} систем",
+    "other": "Здесь пока нет проката велосипедов · доступно {n} системы"
+  },
   "Wind speed field unavailable": "Поле скорости ветра недоступно",
   "Decoder feeds": "Потоки декодера",
   "WebUSB + decoder feeds": "WebUSB + потоки декодера",

src/i18n/locales/uk.json

@@ -2595,6 +2595,13 @@
     "many": "Тут поки немає потоку даних · доступно {n} регіонів",
     "other": "Тут поки немає потоку даних · доступно {n} регіону"
   },
+  "Fly below {km} km to a covered city": "Опустіться нижче {km} км над містом із покриттям",
+  "No bike share here yet · {n} systems available": {
+    "one": "Тут поки немає прокату велосипедів · доступна {n} система",
+    "few": "Тут поки немає прокату велосипедів · доступні {n} системи",
+    "many": "Тут поки немає прокату велосипедів · доступно {n} систем",
+    "other": "Тут поки немає прокату велосипедів · доступно {n} системи"
+  },
   "degraded": "з перебоями",
   "stale": "застарів",
   "partial": "частково",

src/i18n/locales/zh-CN.json

@@ -2302,6 +2302,10 @@
   "No feed here yet · {n} regions available": {
     "other": "此处暂无数据源 · 有 {n} 个覆盖区域"
   },
+  "Fly below {km} km to a covered city": "请降至 {km} km 以下并飞往有覆盖的城市",
+  "No bike share here yet · {n} systems available": {
+    "other": "此处暂无共享单车 · 有 {n} 个可用系统"
+  },
   "degraded": "降级",
   "stale": "过期",
   "partial": "部分可用",

src/i18n/locales/zh-Hant.json

@@ -2290,6 +2290,10 @@
   "No feed here yet · {n} regions available": {
     "other": "此處暫無數據源 · 有 {n} 個覆蓋區域"
   },
+  "Fly below {km} km to a covered city": "請降至 {km} km 以下並飛往有覆蓋的城市",
+  "No bike share here yet · {n} systems available": {
+    "other": "此處暫無共享單車 · 有 {n} 個可用系統"
+  },
   "degraded": "降級",
   "stale": "過期",
   "partial": "部分可用",

src/layers/bikeshare/controls.js

@@ -1,5 +1,6 @@
 import { msg, t } from '../../i18n/index.js';
-import { STATUS_POLL_MS } from './policy.js';
+import { ACTIVATION_ENTER_ALTITUDE_M, STATUS_POLL_MS } from './policy.js';
+import { GBFS_CITY_REGISTRY } from './registry.js';
 
 export function createControls({ state: layerState, services, parts, source }) {
   const methods = {
@@ -57,7 +58,7 @@ export function createControls({ state: layerState, services, parts, source }) {
 
     /**
      * Return current layer statistics for the UI status display.
-     * @returns {{ count: number, lastUpdate: number|null, loading: boolean, loadingLabel?: string, error?: string, degraded?: boolean, stale?: boolean }}
+     * @returns {{ count: number, lastUpdate: number|null, loading: boolean, loadingLabel?: string, error?: string, degraded?: boolean, stale?: boolean, status?: string, statusMessage?: string }}
      */
     getStats() {
       const stats = {
@@ -65,6 +66,23 @@ export function createControls({ state: layerState, services, parts, source }) {
         lastUpdate: layerState._lastUpdate,
         loading: layerState._loading,
       };
+      // No system in range is guidance, not an empty feed: the camera is too
+      // high, or no catalogued system is near the view. A city that failed
+      // leaves range empty too, and reports its failure below instead.
+      if (
+        layerState._enabled &&
+        !layerState._loading &&
+        layerState._activeCityIds.size === 0 &&
+        layerState._failedCityIds.size === 0
+      ) {
+        // English data (the analyst's empty note to the model, and the Layers
+        // row's prompt); both show it through translateStatusMessage
+        // (ui/statusText.js).
+        const note = layerState._altitudeGateEnabled
+          ? `No bike share here yet · ${GBFS_CITY_REGISTRY.length} systems available`
+          : `Fly below ${Math.round(ACTIVATION_ENTER_ALTITUDE_M / 1000).toLocaleString('en-US')} km to a covered city`;
+        return { ...stats, status: 'zoom-in', statusMessage: note };
+      }
       if (layerState._loading) {
         stats.loadingLabel =
           layerState._activeCityIds.size > 0

src/layers/bikeshare/coverageStatus.test.mjs

@@ -0,0 +1,124 @@
+// BIKESHARE COVERAGE STATUS — a view with no system says so.
+//
+// Over a city with no catalogued system (London, Tokyo) the layer drew nothing
+// and reported nothing, so its row read "ON · — · GBFS · never": the same as a
+// feed that had never answered. These cases pin the rule that replaced it:
+// with no system in range the layer reports a guidance status that says why,
+// and a view it left keeps no date for data it no longer draws.
+//
+// Run with: npm test
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { createState } from './state.js';
+import { createControls } from './controls.js';
+import { createModel } from './model.js';
+import { createViewport } from './viewport.js';
+import { GBFS_CITY_REGISTRY } from './registry.js';
+
+const LONDON = { lat: 51.5072, lon: -0.1276 };
+
+function makeLayer() {
+  const services = {
+    overlays: {
+      setOverlayEntries() {},
+      setOverlaySourceVisible() {},
+      clearOverlaySource() {},
+    },
+    render: { governorRequestRender() {} },
+  };
+  const state = createState({ services });
+  const parts = {
+    queries: { collectDetectableStations: () => [] },
+    model: createModel({ state, services, parts: {}, source: null }),
+    ingestion: { abortInFlight() {} },
+    rendering: { removeCityPoints() {} },
+  };
+  parts.viewport = createViewport({ state, services, parts, source: null });
+  const { methods } = createControls({ state, services, parts, source: {} });
+  state._enabled = true;
+  return { state, methods, viewport: parts.viewport };
+}
+
+/** A viewer looking straight down at `at` from `height` metres. */
+function viewerAt(at, height) {
+  const rad = Math.PI / 180;
+  return {
+    camera: {
+      positionCartographic: {
+        height,
+        latitude: at.lat * rad,
+        longitude: at.lon * rad,
+      },
+      computeViewRectangle: () => undefined,
+    },
+    scene: { globe: {} },
+  };
+}
+
+test('above the altitude gate the row says how low to fly', async () => {
+  const { state, methods, viewport } = makeLayer();
+  state._viewer = viewerAt(LONDON, 2_000_000);
+  await viewport.runProximityCheck();
+
+  const stats = methods.getStats();
+  assert.equal(stats.status, 'zoom-in');
+  assert.equal(stats.statusMessage, 'Fly below 48 km to a covered city');
+  assert.equal(stats.error, undefined);
+});
+
+test('a city with no system says so and counts the ones there are', async () => {
+  const { state, methods, viewport } = makeLayer();
+  state._viewer = viewerAt(LONDON, 8_000);
+  await viewport.runProximityCheck();
+
+  const stats = methods.getStats();
+  assert.equal(stats.status, 'zoom-in');
+  assert.equal(
+    stats.statusMessage,
+    `No bike share here yet · ${GBFS_CITY_REGISTRY.length} systems available`,
+  );
+  assert.equal(stats.count, 0);
+});
+
+test('a city with a system in range is not given the prompt', () => {
+  const { state, methods } = makeLayer();
+  state._altitudeGateEnabled = true;
+  state._activeCityIds.add('boston-bluebikes');
+
+  assert.equal(methods.getStats().status, undefined);
+});
+
+test('a loading or failed city reports itself, not the prompt', () => {
+  const { state, methods } = makeLayer();
+  state._altitudeGateEnabled = true;
+  state._loading = true;
+  assert.equal(methods.getStats().status, undefined);
+
+  // A city that failed is dropped from range, and still owns the row.
+  state._loading = false;
+  state._failedCityIds.add('boston-bluebikes');
+  const stats = methods.getStats();
+  assert.equal(stats.status, undefined);
+  assert.equal(stats.error, 'GBFS fetch error');
+});
+
+test('a disabled layer reports no prompt', () => {
+  const { state, methods } = makeLayer();
+  state._enabled = false;
+  assert.equal(methods.getStats().status, undefined);
+});
+
+test('leaving every system behind drops the date of the data it drew', async () => {
+  for (const height of [8_000, 2_000_000]) {
+    const { state, methods, viewport } = makeLayer();
+    state._lastUpdate = Date.now();
+    // Boston's stations were drawn and dated; the camera moves to London.
+    state._activeCityIds.add('boston-bluebikes');
+    state._cityRuntime.set('boston-bluebikes', {});
+    state._viewer = viewerAt(LONDON, height);
+    await viewport.runProximityCheck();
+
+    assert.equal(state._activeCityIds.size, 0);
+    assert.equal(methods.getStats().lastUpdate, null, `at ${height} m`);
+  }
+});

src/layers/bikeshare/viewport.js

@@ -125,6 +125,8 @@ export function createViewport({ state: layerState, services, parts, source }) {
     // A failure belongs to a city in range; none are once everything is off.
     layerState._failedCityIds.clear();
     layerState._count = 0;
+    // Nothing is left on the map to date.
+    layerState._lastUpdate = null;
   }
 
   /**
@@ -227,6 +229,7 @@ export function createViewport({ state: layerState, services, parts, source }) {
     layerState._activeCityIds = nextActive;
     if (layerState._activeCityIds.size === 0) {
       layerState._count = 0;
+      layerState._lastUpdate = null;
       return;
     }
 

src/layers/transit/lifecycle.test.mjs

@@ -3982,3 +3982,42 @@ test('parked transit reprojects held and reported courses at the bounded camera
     'selected unknown course also stays screen-up',
   );
 });
+
+test('a view with no feed reads its coverage prompt, not an undated feed', async (t) => {
+  const app = harness(t);
+  app.serve('mbta', () => ({
+    status: 200,
+    body: snapshot(
+      'mbta',
+      'MBTA',
+      [vehicle('bus-1', 42.36, -71.06, Date.now() / 1000)],
+      { fetchedAt: Date.now() },
+    ),
+  }));
+  app.layer.enable(app.viewer);
+  await app.layer.update();
+  assert.ok(app.layer.getStats().lastUpdate, 'Boston has a dated snapshot');
+
+  // London has no registered feed: the row prompts instead of dating Boston's
+  // last snapshot over an empty map.
+  app.lookAt({ west: -0.2, south: 51.45, east: -0.05, north: 51.55 });
+  app.advance(1_000);
+  const away = app.layer.getStats();
+  assert.equal(away.status, 'zoom-in');
+  assert.equal(away.count, 0);
+  assert.equal(away.lastUpdate, null);
+  assert.match(
+    away.statusMessage,
+    /^No feed here yet · \d+ regions available$/,
+  );
+  assert.equal(away.coverage, away.statusMessage);
+
+  // Above the altitude gate the prompt says how low to fly.
+  app.viewer.camera.positionCartographic.height = 10_000_000;
+  app.lookAt({ west: -0.2, south: 51.45, east: -0.05, north: 51.55 });
+  app.advance(1_000);
+  assert.equal(
+    app.layer.getStats().statusMessage,
+    'Fly below 3,000 km to a covered region',
+  );
+});

src/layers/transit/queries.js

@@ -240,17 +240,20 @@ export function createQueries({ state, parts }) {
       const health = aggregateTransitFeedHealth(statuses, now);
       const count = state._vehicles.size;
       if (state._enabled && active.length === 0) {
+        // English data (the analyst's empty note to the model, and the Layers
+        // row's prompt); both show it through translateStatusMessage
+        // (ui/statusText.js).
+        const note = state._altitudeGateOpen
+          ? `No feed here yet · ${TRANSIT_ENABLED_FEEDS.length} regions available`
+          : `Fly below ${Math.round(ACTIVATION_ALTITUDE_M / 1000).toLocaleString('en-US')} km to a covered region`;
         return {
           count: 0,
           lastUpdate: state._lastUpdate,
           error: null,
           source: 'GTFS-RT',
           status: 'zoom-in',
-          // English data (the analyst's empty note to the model); the voice
-          // card shows it through NOTE_PATTERNS (voice/resultDisplay.js).
-          coverage: state._altitudeGateOpen
-            ? `No feed here yet · ${TRANSIT_ENABLED_FEEDS.length} regions available`
-            : `Fly below ${Math.round(ACTIVATION_ALTITUDE_M / 1000).toLocaleString('en-US')} km to a covered region`,
+          statusMessage: note,
+          coverage: note,
         };
       }
       // Age is shown by the same rule the row state uses, so the text and the

src/layers/transit/viewport.js

@@ -108,6 +108,9 @@ export function createViewport({ state, services, parts }) {
         parts.ingestion.removeFeedVehicles(feedId);
       }
     }
+    // Leaving coverage leaves nothing on the map to date: a row that read
+    // "26s ago" over an empty view would claim a feed that is no longer here.
+    if (desired.size === 0) state._lastUpdate = null;
     for (const [feedId, feed] of desired) {
       if (!state._activeFeeds.has(feedId)) {
         state._activeFeeds.set(feedId, feed);

src/ui/layerPanel.js

@@ -11,14 +11,17 @@ import {
 } from './layerNames.js';
 export { localizeLayerName } from './layerNames.js';
 import { createWeatherPanel } from './weatherPanel.js';
-import { translateFeedError, translateStatusLine } from './statusText.js';
+import {
+  translateFeedError,
+  translateStatusLine,
+  translateStatusMessage,
+} from './statusText.js';
 import {
   formatNumber,
   getLocale,
   msg,
   onLocaleChange,
   t,
-  translateKnown,
 } from '../i18n/index.js';
 
 // Feed-state values are machine ids (QA hooks, CSS feed-* classes); only the
@@ -691,7 +694,7 @@ export class LayerPanel {
       typeof stats.statusMessage === 'string' &&
       stats.statusMessage.trim()
     ) {
-      return `${source} · ${translateKnown(stats.statusMessage.trim())}`;
+      return `${source} · ${translateStatusMessage(stats.statusMessage.trim())}`;
     }
     const ago = stats.lastUpdate ? this._timeAgo(stats.lastUpdate) : t('never');
     if (stats.loading) {

src/ui/layerPanel.test.mjs

@@ -431,3 +431,57 @@ test('without the Utilities list, Directions stays in Data Layers under Utilitie
     restore();
   }
 });
+
+test('a layer with no feed in view says why instead of "never"', async () => {
+  const { LayerPanel, presentLayerCount, presentLayerToggle } =
+    await import('./layerPanel.js');
+  const { setLocale } = await import('../i18n/index.js');
+  const panel = LayerPanel.prototype;
+  const rows = [
+    {
+      id: 'transit',
+      name: 'Transit',
+      source: 'GTFS-RT',
+      enabled: true,
+      stats: {
+        count: 0,
+        lastUpdate: null,
+        source: 'GTFS-RT',
+        status: 'zoom-in',
+        statusMessage: 'No feed here yet · 16 regions available',
+      },
+      meta: 'GTFS-RT · No feed here yet · 16 regions available',
+    },
+    {
+      id: 'bikeshare',
+      name: 'Bikeshare',
+      source: 'GBFS',
+      enabled: true,
+      stats: {
+        count: 0,
+        lastUpdate: null,
+        loading: false,
+        status: 'zoom-in',
+        statusMessage: 'Fly below 48 km to a covered city',
+      },
+      meta: 'GBFS · Fly below 48 km to a covered city',
+    },
+  ];
+  for (const layer of rows) {
+    // Guidance is normal operation: the layer is on and nothing has failed.
+    assert.equal(presentLayerToggle(layer).text, 'ON');
+    assert.equal(presentLayerCount(layer.stats).empty, true);
+    assert.equal(panel._buildMetaText(layer), layer.meta);
+  }
+
+  setLocale('ru');
+  try {
+    for (const layer of rows) {
+      const meta = panel._buildMetaText(layer);
+      assert.doesNotMatch(meta, /never|Fly below|No feed|covered/, meta);
+      assert.match(meta, /^(GTFS-RT|GBFS) · /, meta);
+    }
+  } finally {
+    setLocale('en');
+  }
+});

src/ui/statusText.js

@@ -265,3 +265,66 @@ export function translateStatusLine(text) {
     .map(translateStatusPiece)
     .join(STATUS_SEPARATOR);
 }
+
+/** Thousands separators out of an English number ("3,000" → 3000). */
+const englishNumber = (text) => Number(text.replace(/,/g, ''));
+
+// Coverage notes of a layer whose view has no feed, whole lines with a number
+// in them: transit (transit/queries.js) and bikeshare (bikeshare/controls.js).
+// Their " · " is part of one sentence, so they are matched before the line is
+// split into pieces. Keep these in step with the producers.
+const COVERAGE_NOTE_PATTERNS = [
+  [
+    /^Fly below ([\d,]+) km to a covered region$/,
+    ([, km]) =>
+      t('Fly below {km} km to a covered region', {
+        km: formatNumber(englishNumber(km)),
+      }),
+  ],
+  [
+    /^No feed here yet · ([\d,]+) regions available$/,
+    ([, regions]) => {
+      const count = englishNumber(regions);
+      return tn(
+        count,
+        'No feed here yet · {n} region available',
+        'No feed here yet · {n} regions available',
+        { n: formatNumber(count) },
+      );
+    },
+  ],
+  [
+    /^Fly below ([\d,]+) km to a covered city$/,
+    ([, km]) =>
+      t('Fly below {km} km to a covered city', {
+        km: formatNumber(englishNumber(km)),
+      }),
+  ],
+  [
+    /^No bike share here yet · ([\d,]+) systems available$/,
+    ([, systems]) => {
+      const count = englishNumber(systems);
+      return tn(
+        count,
+        'No bike share here yet · {n} system available',
+        'No bike share here yet · {n} systems available',
+        { n: formatNumber(count) },
+      );
+    },
+  ],
+];
+
+/**
+ * A layer's status message in the UI language: its catalog entry, a coverage
+ * note by its shape, or a status line translated piece by piece.
+ */
+export function translateStatusMessage(text) {
+  if (typeof text !== 'string') return text;
+  const known = translateKnown(text);
+  if (known !== text) return known;
+  for (const [pattern, format] of COVERAGE_NOTE_PATTERNS) {
+    const match = pattern.exec(text);
+    if (match) return format(match);
+  }
+  return translateStatusLine(text);
+}

src/ui/statusText.test.mjs

@@ -3,7 +3,11 @@
 import assert from 'node:assert/strict';
 import test from 'node:test';
 import { setLocale, t } from '../i18n/index.js';
-import { translateFeedError, translateStatusLine } from './statusText.js';
+import {
+  translateFeedError,
+  translateStatusLine,
+  translateStatusMessage,
+} from './statusText.js';
 
 function inLocale(locale, run) {
   setLocale(locale);
@@ -75,3 +79,55 @@ for (const locale of ['es', 'ru']) {
     });
   });
 }
+
+// A layer's coverage note when no feed covers the view: one sentence with a
+// " · " in it (transit/queries.js, bikeshare/controls.js).
+const COVERAGE_NOTES = [
+  'Fly below 3,000 km to a covered region',
+  'No feed here yet · 16 regions available',
+  'Fly below 48 km to a covered city',
+  'No bike share here yet · 61 systems available',
+];
+
+test('en: coverage notes show as they came', () => {
+  setLocale('en');
+  for (const text of COVERAGE_NOTES)
+    assert.equal(translateStatusMessage(text), text);
+  assert.equal(
+    translateStatusMessage('No bike share here yet · 1 systems available'),
+    'No bike share here yet · 1 system available',
+  );
+});
+
+for (const locale of ['es', 'ru', 'ja']) {
+  test(`${locale}: a coverage note translates whole, numbers kept`, () => {
+    inLocale(locale, () => {
+      for (const text of COVERAGE_NOTES) {
+        const shown = translateStatusMessage(text);
+        assert.doesNotMatch(
+          shown,
+          /\b(Fly|below|covered|feed|bike share|available)\b/,
+          shown,
+        );
+        const number = /[\d,]+(?= km| regions| systems)/.exec(text)[0];
+        assert.ok(
+          shown.replace(/[^\d]/g, '').includes(number.replace(/,/g, '')),
+          shown,
+        );
+      }
+    });
+  });
+
+  test(`${locale}: a status message without a coverage note keeps its other forms`, () => {
+    inLocale(locale, () => {
+      assert.equal(
+        translateStatusMessage('Upstream response too large'),
+        t('Upstream response too large'),
+      );
+      assert.equal(
+        translateStatusMessage('2 feeds live · 14 heard'),
+        translateStatusLine('2 feeds live · 14 heard'),
+      );
+    });
+  });
+}

src/voice/resultDisplay.js

@@ -29,7 +29,7 @@ import {
 } from '../i18n/index.js';
 import { layerNameForId, sourceLabel } from '../ui/layerNames.js';
 import { localizePlaceName } from '../ui/placeNames.js';
-import { translateStatusLine } from '../ui/statusText.js';
+import { translateStatusMessage } from '../ui/statusText.js';
 import { formatQuantity } from '../ui/unitLabels.js';
 
 /** Split "a; b" caveat text into separate notes. */
@@ -397,27 +397,6 @@ const NOTE_PATTERNS = [
             'Contacts panel snapshot — the same retained cohort supplies the card, speech, and follow-up memory',
           )) + period,
   ],
-  // Transit's empty note when no feed covers the view (transit/queries.js);
-  // the model gets the English.
-  [
-    /^Fly below ([\d,]+) km to a covered region$/,
-    ([, km]) =>
-      t('Fly below {km} km to a covered region', {
-        km: formatNumber(Number(km.replace(/,/g, ''))),
-      }),
-  ],
-  [
-    /^No feed here yet · ([\d,]+) regions available$/,
-    ([, regions]) => {
-      const count = Number(regions.replace(/,/g, ''));
-      return tn(
-        count,
-        'No feed here yet · {n} region available',
-        'No feed here yet · {n} regions available',
-        { n: formatNumber(count) },
-      );
-    },
-  ],
   [
     /^([a-z0-9-]+) (off|loading|error)$/,
     ([, key, status]) =>
@@ -444,10 +423,10 @@ function shownNote(text) {
     const shown = match ? show(match) : null;
     if (shown) return shown;
   }
-  // A layer's empty note can be its status line, English pieces joined by
-  // " · " ("feeds 1090, 978 stale · 0 heard", "TTC 0 (95s old)").
-  const known = translateKnown(text);
-  return known !== text ? known : translateStatusLine(text);
+  // A layer's empty note can be its coverage note ("Fly below 3,000 km to a
+  // covered region") or its status line, English pieces joined by " · "
+  // ("feeds 1090, 978 stale · 0 heard", "TTC 0 (95s old)").
+  return translateStatusMessage(text);
 }
 
 /** Feed states as the card's chips show them; the values stay English. */