feat: implement screendesign

src/Service/BookingSummaryDataService.php

@@ -69,10 +69,14 @@ class BookingSummaryDataService
         // Calculate participant count from room capacity (source of truth)
         $participantCount = $this->calculateParticipantCountFromRooms($bookingDto);
 
+        // Calculate payable amount after voucher deductions
+        $payableAmount = $this->calculatePayableAmount($bookingDto, $pricingData['grandTotal'], $participantPrices);
+
         return new BookingSummaryDto(
             selectedRooms: $selectedRooms,
             participantCount: $participantCount,
-            totalPrice: number_format($totalPrice, 2, ',', '.').' €',
+            totalPrice: $pricingData['grandTotal'],
+            payableAmount: $payableAmount,
             groupedSelectedRooms: $groupedSelectedRooms,
             assignmentCounts: $roomCounts,
             pricingData: $pricingData,
@@ -81,13 +85,35 @@ class BookingSummaryDataService
     }
 
     /**
-     * Calculates participant count from room selections.
+     * Calculates the payable amount after voucher deductions.
      *
-     * This is the source of truth for participant count, calculated by
-     * multiplying each selected room's quantity by its maximum capacity (maxPax).
+     * @param array<int, float> $participantPrices Prices per participant for percentage voucher calculation
+     */
+    private function calculatePayableAmount(BookingDto $bookingDto, float $grandTotal, array $participantPrices): float
+    {
+        $acceptedVouchers = $bookingDto->getAcceptedVouchers($participantPrices);
+
+        if (null === $acceptedVouchers) {
+            return $grandTotal;
+        }
+
+        return max(0.0, $grandTotal - $acceptedVouchers->getTotalDiscount());
+    }
+
+    /**
+     * Calculates participant count.
+     *
+     * In edit mode, counts actual participants. In create mode, calculates
+     * from room selections by multiplying quantity by maximum capacity (maxPax).
      */
     private function calculateParticipantCountFromRooms(BookingDto $bookingDto): int
     {
+        // In edit mode, use actual participant count
+        if (BookingDto::MODE_EDIT === $bookingDto->getMode()) {
+            return count($bookingDto->participants);
+        }
+
+        // In create mode, calculate from room selections
         $totalCapacity = 0;
         $availableRooms = $bookingDto->travel->getAvailableRooms();