Update Retention report.

src/components/input/WebsiteMonthSelect.tsx

@@ -0,0 +1,17 @@
+import { useDateRange } from '@/components/hooks';
+import { dateToRangeValue } from '@/lib/date';
+import { MonthSelect } from './MonthSelect';
+
+export function WebsiteMonthSelect({ websiteId }: { websiteId: string }) {
+  const {
+    dateRange: { startDate },
+    saveDateRange,
+  } = useDateRange(websiteId);
+
+  const handleMonthSelect = (date: Date) => {
+    const range = dateToRangeValue(date);
+    saveDateRange(range);
+  };
+
+  return <MonthSelect date={startDate} onChange={handleMonthSelect} />;
+}