fix: make sure calculations in booking flow are correct

apps/scandic-web/components/HotelReservation/BookingConfirmation/PriceDetailsModal/index.tsx

@@ -75,6 +75,9 @@ export default function PriceDetailsModal() {
     return null
   }
 
+  const checkInDate = dt(fromDate).format("YYYY-MM-DD")
+  const checkOutDate = dt(toDate).format("YYYY-MM-DD")
+
   const bookingTotal = rooms.reduce(
     (acc, room) => {
       if (room) {
@@ -89,7 +92,7 @@ export default function PriceDetailsModal() {
     { price: 0, priceExVat: 0, vatAmount: 0 }
   )
 
-  const diff = dt(toDate).diff(fromDate, "days")
+  const diff = dt(checkOutDate).diff(checkInDate, "days")
   const nights = intl.formatMessage(
     { id: "{totalNights, plural, one {# night} other {# nights}}" },
     { totalNights: diff }