Instrument API timing and reduce detail fallbacks

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

@@ -12,6 +12,7 @@ import {
 import {
   MAX_HOURLY_DETAIL_CONCURRENT_REQUESTS,
   HOURLY_CACHE_TTL_MS,
+  __resolveCityDetailFromBatchForTest,
   __readHourlyCacheEntryForTest,
   __resetHourlyDetailRequestQueueForTest,
   __runQueuedHourlyDetailRequestForTest,
@@ -95,7 +96,7 @@ export async function runTests() {
       chartLogicSource.includes("primeCityDetailCache"),
     "visible terminal chart detail fetches should be coalesced into one batch request and prime the shared chart cache",
   );
-  const fetchHourlyBlock = chartLogicSource.match(/async function fetchHourlyForecastForCity[\s\S]*?\n}\n\nfunction fetchCityDetailWithTimeout/)?.[0] || "";
+  const fetchHourlyBlock = chartLogicSource.match(/async function fetchHourlyForecastForCity[\s\S]*?\r?\n}\r?\n\r?\nfunction fetchCityDetailWithTimeout/)?.[0] || "";
   assert(
     fetchHourlyBlock.includes("queueCityDetailBatch(city, resParam)") &&
       !fetchHourlyBlock.includes("runQueuedHourlyDetailRequest"),
@@ -130,6 +131,19 @@ export async function runTests() {
     __shouldFetchCityDetailForChartForTest({ city: "paris", documentHidden: true, isChartVisible: true }) === false,
     "hidden browser tabs should not prefetch city detail",
   );
+  const normalizedBatchDetail = __resolveCityDetailFromBatchForTest(
+      {
+        "hong kong": {
+          city: "hong kong",
+          timeseries: { hourly: { times: ["00:00"], temps: [32] } },
+        },
+      } as any,
+      "Hong Kong",
+    ) as any;
+  assert(
+    normalizedBatchDetail?.city === "hong kong",
+    "frontend detail batch lookup should accept backend-normalized city keys before falling back to single-city requests",
+  );
 
   __resetHourlyDetailRequestQueueForTest();
   let activeRequests = 0;