fix: refresh same-day OHLCV bars

frontend/src/pages/TickerDetailPage.tsx

@@ -64,10 +64,43 @@ function timeAgo(iso: string): string {
   return `${days}d ago`;
 }
 
+function marketDate(date = new Date()): string {
+  const parts = new Intl.DateTimeFormat('en-US', {
+    timeZone: 'America/New_York',
+    year: 'numeric',
+    month: '2-digit',
+    day: '2-digit',
+  }).formatToParts(date);
+  const value = (type: Intl.DateTimeFormatPartTypes) =>
+    parts.find((part) => part.type === type)?.value ?? '';
+  return value('year') + '-' + value('month') + '-' + value('day');
+}
+
+function formatSessionDate(isoDate: string): string {
+  if (isoDate === marketDate()) return 'Today';
+
+  // Parse date-only market sessions explicitly. Parsing YYYY-MM-DD directly as
+  // a Date means midnight UTC and makes today's bar look many hours old.
+  const [year, month, day] = isoDate.split('-').map(Number);
+  if (!year || !month || !day) return isoDate;
+  return new Intl.DateTimeFormat(undefined, {
+    month: 'short',
+    day: 'numeric',
+    year: year === new Date().getFullYear() ? undefined : 'numeric',
+    timeZone: 'UTC',
+  }).format(new Date(Date.UTC(year, month - 1, day)));
+}
+
+function formatOHLCVFreshness(sessionDate: string, updatedAt?: string | null): string {
+  const session = formatSessionDate(sessionDate);
+  return updatedAt ? session + ' · updated ' + timeAgo(updatedAt) : session;
+}
+
 interface DataStatusItem {
   label: string;
   available: boolean;
   timestamp?: string | null;
+  timestampLabel?: string | null;
   selector: FetchSelector;   // what a refresh of this row fetches
   paid?: boolean;            // provider call that may cost money/quota
 }
@@ -100,7 +133,7 @@ function DataFreshnessBar({
           }`} />
           <span className="text-xs text-gray-400">{item.label}</span>
           {item.available && item.timestamp ? (
-            <span className="text-[10px] text-gray-500">{timeAgo(item.timestamp)}</span>
+            <span className="text-[10px] text-gray-500">{item.timestampLabel ?? timeAgo(item.timestamp)}</span>
           ) : !item.available ? (
             <span className="text-[10px] text-gray-600">no data</span>
           ) : null}
@@ -171,10 +204,16 @@ export default function TickerDetailPage() {
   const dataStatus: DataStatusItem[] = useMemo(() => [
     {
       label: 'OHLCV',
-      // Market age of the latest bar (session date), not DB insert time —
-      // created_at stays frozen when the provider returns no new sessions.
+      // Keep the market session date distinct from the last successful bar
+      // write; treating YYYY-MM-DD as an instant makes today's session look old.
       available: !!ohlcv.data && ohlcv.data.length > 0,
       timestamp: ohlcv.data?.[ohlcv.data.length - 1]?.date,
+      timestampLabel: ohlcv.data?.length
+        ? formatOHLCVFreshness(
+            ohlcv.data[ohlcv.data.length - 1].date,
+            ohlcv.data[ohlcv.data.length - 1].created_at,
+          )
+        : null,
       selector: ['ohlcv'] as FetchSelector,
       paid: true,
     },