add payment, trust badge, handle race condition, fix booking schema

lib/trip-dates.ts

@@ -81,3 +81,30 @@ export function isPastTripLastDayForReview(
   );
   return Date.now() > endMs;
 }
+
+/**
+ * Tampilkan tanggal trip untuk UI: pakai **kalender UTC** (sama dengan
+ * `tripStoredInstantFromYmd` & filter Open Trip), supaya tidak bergeser
+ * karena timezone runtime (server vs browser).
+ */
+export function formatTripCalendarDateLong(
+  d: Date | string,
+  locale = "id-ID"
+): string {
+  const date = typeof d === "string" ? new Date(d) : d;
+  return new Intl.DateTimeFormat(locale, {
+    dateStyle: "long",
+    timeZone: "UTC",
+  }).format(date);
+}
+
+export function formatTripCalendarDateRangeLong(
+  start: Date | string,
+  end?: Date | string | null,
+  locale = "id-ID"
+): string {
+  const startStr = formatTripCalendarDateLong(start, locale);
+  if (!end) return startStr;
+  const endStr = formatTripCalendarDateLong(end, locale);
+  return `${startStr} — ${endStr}`;
+}