fix: align hong kong compact hko stat

frontend/components/dashboard/scan-terminal/LiveTemperatureThresholdChart.tsx

@@ -31,6 +31,7 @@ import {
   normObs,
   prefersHighFrequencyRunwayResolution,
   readSessionCache,
+  selectCompactSecondaryTemp,
   selectDisplayRunwayTemp,
   seedHourlyForecastFromRow,
   shouldPollLiveChart,
@@ -635,6 +636,7 @@ export function LiveTemperatureThresholdChart({
   }, [chartSeries, userToggledKeys, city, showRunwayDetails]);
 
   const {
+    isHKO,
     isShenzhen,
     metarHeaderLabel,
     metarHighLabel,
@@ -642,11 +644,17 @@ export function LiveTemperatureThresholdChart({
     runwayHighLabel,
   } = useMemo(() => getLiveObservationLabels(row, chartHourly), [row, chartHourly]);
 
-  const { currentRunwayTemp, observedHighMetar, observedHighRunway } = useMemo(
+  const { currentMetarTemp, currentRunwayTemp, observedHighMetar, observedHighRunway } = useMemo(
     () => getObservationDisplayMetrics(row, chartHourly, settlementPlate),
     [row, chartHourly, settlementPlate],
   );
   const displayRunwayTemp = selectDisplayRunwayTemp(liveTemp, currentRunwayTemp, hasRunwayData);
+  const displayMetarTemp = selectCompactSecondaryTemp({
+    isHKO,
+    isShenzhen,
+    displayMetarTemp: currentMetarTemp,
+    observedHighMetar,
+  });
   const wundergroundDailyHigh = getWundergroundDailyHigh(chartHourly);
 
   const localDateStr = chartLocalDate || new Date().toISOString().slice(0, 10);
@@ -805,6 +813,7 @@ export function LiveTemperatureThresholdChart({
       visible_series: activeSeries.map((item) => item.key),
       live_temp: liveTemp,
       current_runway_temp: currentRunwayTemp,
+      current_metar_temp: currentMetarTemp,
       observed_high_metar: observedHighMetar,
       observed_high_runway: observedHighRunway,
     });
@@ -814,6 +823,7 @@ export function LiveTemperatureThresholdChart({
     chartSeries,
     city,
     compact,
+    currentMetarTemp,
     currentRunwayTemp,
     detailError,
     hasRunwayData,
@@ -960,6 +970,7 @@ export function LiveTemperatureThresholdChart({
           metarHighLabel={metarHighLabel}
           isShenzhen={isShenzhen}
           displayRunwayTemp={displayRunwayTemp}
+          displayMetarTemp={displayMetarTemp}
           observedHighMetar={observedHighMetar}
           observedHighRunway={observedHighRunway}
           wundergroundDailyHigh={wundergroundDailyHigh}
@@ -1034,4 +1045,5 @@ export const __getInitialDetailLoadDelayMsForTest = getInitialDetailLoadDelayMs;
 export const __shouldFetchCityDetailForChartForTest = shouldFetchCityDetailForChart;
 export const __shouldPollLiveChartForTest = shouldPollLiveChart;
 export const __mergePatchIntoHourlyForTest = mergePatchIntoHourly;
+export const __selectCompactSecondaryTempForTest = selectCompactSecondaryTemp;
 export const __selectDisplayRunwayTempForTest = selectDisplayRunwayTemp;

frontend/components/dashboard/scan-terminal/TemperatureStatsBars.tsx

@@ -76,6 +76,7 @@ export function TemperatureStatsBars({
   metarHighLabel,
   isShenzhen,
   displayRunwayTemp,
+  displayMetarTemp,
   observedHighMetar,
   observedHighRunway,
   wundergroundDailyHigh,
@@ -97,6 +98,7 @@ export function TemperatureStatsBars({
   metarHighLabel: string;
   isShenzhen: boolean;
   displayRunwayTemp: number | null;
+  displayMetarTemp: number | null;
   observedHighMetar: number | null;
   observedHighRunway: number | null;
   wundergroundDailyHigh: number | null;
@@ -129,7 +131,7 @@ export function TemperatureStatsBars({
             <span className="text-slate-300">|</span>
             <span className="font-semibold text-slate-500">
               {labels.compactSecondary}:{" "}
-              <strong className="text-blue-600 font-mono">{temp(observedHighMetar, tempSymbol)}</strong>
+              <strong className="text-blue-600 font-mono">{temp(displayMetarTemp, tempSymbol)}</strong>
             </span>
           </div>
         ) : (

frontend/components/dashboard/scan-terminal/__tests__/temperatureDefaultVisibilityPolicy.test.ts

@@ -9,6 +9,7 @@ import {
   __getVisibleTemperatureSeriesForTest,
   __isTemperatureSeriesVisibleByDefaultForTest,
   __mergePatchIntoHourlyForTest,
+  __selectCompactSecondaryTempForTest,
   __selectDisplayRunwayTempForTest,
 } from "@/components/dashboard/scan-terminal/LiveTemperatureThresholdChart";
 import { __buildTemperatureTooltipRowsForTest } from "@/components/dashboard/scan-terminal/TemperatureTooltipContent";
@@ -976,6 +977,68 @@ export function runTests() {
     "runway header should prefer runway-history current temp even when the latest detail payload lacks runway_obs snapshot",
   );
 
+  const hongKongMetrics = __getObservationDisplayMetricsForTest(
+    {
+      city: "hong kong",
+      local_date: "2026-06-06",
+      local_time: "16:48",
+      tz_offset_seconds: 8 * 60 * 60,
+      current_temp: 30.4,
+      current_max_so_far: 30.4,
+      temp_symbol: "°C",
+    } as any,
+    {
+      localTime: "16:48",
+      times: ["00:00", "12:00", "18:00", "23:00"],
+      temps: [28.0, 31.0, 29.0, 28.0],
+      settlementTodayObs: [
+        { time: "14:00", temp: 30.4 },
+        { time: "16:40", temp: 28.1 },
+      ],
+      airportPrimary: {
+        temp: 28.7,
+        obs_time: "2026-06-06T16:48:00+08:00",
+        source_code: "cowin_obs",
+        source_label: "CoWIN 6087",
+      },
+      airportPrimaryTodayObs: [
+        { time: "16:47", temp: 28.6 },
+        { time: "16:48", temp: 28.7 },
+      ],
+    } as any,
+    null,
+  );
+  assert(
+    hongKongMetrics.currentRunwayTemp === 28.7,
+    "Hong Kong primary compact stat should stay on the latest CoWIN reference-station point",
+  );
+  assert(
+    (hongKongMetrics as any).currentMetarTemp === 28.1,
+    "Hong Kong secondary compact stat should have the latest HKO point separate from the HKO daily high",
+  );
+  assert(
+    hongKongMetrics.observedHighMetar === 30.4,
+    "Hong Kong HKO daily high should still be available for expanded daily-high summaries",
+  );
+  assert(
+    __selectCompactSecondaryTempForTest({
+      isHKO: true,
+      isShenzhen: false,
+      displayMetarTemp: (hongKongMetrics as any).currentMetarTemp,
+      observedHighMetar: hongKongMetrics.observedHighMetar,
+    }) === 28.1,
+    "Hong Kong compact HKO stat should render the latest HKO point, not the HKO daily high",
+  );
+  assert(
+    __selectCompactSecondaryTempForTest({
+      isHKO: false,
+      isShenzhen: false,
+      displayMetarTemp: 72.0,
+      observedHighMetar: 73.9,
+    }) === 73.9,
+    "non-HKO compact secondary stat should keep the existing daily-high behavior",
+  );
+
   const wuhanRunwayChart = __buildTemperatureChartDataForTest(
     {
       city: "wuhan",

frontend/components/dashboard/scan-terminal/temperature-chart-logic.ts

@@ -845,9 +845,14 @@ function getObservationDisplayMetrics(
       null;
   }
 
+  const currentMetarTemp =
+    latestSettlement ??
+    latestMetar ??
+    airportCurrentTemp ??
+    null;
   const observedHighMetar = airportHigh ?? highSettlement ?? highMetar ?? rowMetarHigh ?? null;
 
-  return { currentRunwayTemp, observedHighMetar, observedHighRunway };
+  return { currentMetarTemp, currentRunwayTemp, observedHighMetar, observedHighRunway };
 }
 
 function selectDisplayRunwayTemp(
@@ -859,6 +864,23 @@ function selectDisplayRunwayTemp(
   return liveTemp;
 }
 
+function selectCompactSecondaryTemp({
+  isHKO,
+  isShenzhen,
+  displayMetarTemp,
+  observedHighMetar,
+}: {
+  isHKO: boolean;
+  isShenzhen: boolean;
+  displayMetarTemp: number | null;
+  observedHighMetar: number | null;
+}) {
+  if (isHKO && !isShenzhen && displayMetarTemp !== null) {
+    return displayMetarTemp;
+  }
+  return observedHighMetar;
+}
+
 function isSettlementRunway(row: ScanOpportunityRow | null, rwy: string) {
   const cityKey = normalizeCityKey(row?.city);
   const settlementPairs = SETTLEMENT_RUNWAY_PAIRS[cityKey] || [];
@@ -2485,6 +2507,7 @@ export {
   normalizeCityKey,
   prefersHighFrequencyRunwayResolution,
   readSessionCache,
+  selectCompactSecondaryTemp,
   selectDisplayRunwayTemp,
   seedHourlyForecastFromRow,
   seriesStats,