fix: fetch fresh room prices from api to avoid calculation mismatch

api.http

@@ -72,7 +72,7 @@ Authorization: Bearer {{$auth.token("oauth2_api")}}
 
 ### API hotel availability remote
 # @no-cookie-jar
-GET {{base_url}}/api/travels/11603/152546/2026-01-03/availability
+GET {{base_url}}/api/travels/11606/152546/2026-01-24/availability
 Accept: application/json
 Authorization: Bearer {{$auth.token("oauth2_api")}}
 

src/Service/BookingService.php

@@ -247,6 +247,10 @@ class BookingService
             $this->travelDataService->patchAvailabilities($travelData, $availabilities);
         }
 
+        // Fetch and patch room prices from API to ensure consistency with booking validation
+        // This prevents price mismatch errors when XML export has stale prices
+        $this->travelDataService->patchRoomPricesFromApi($travelData);
+
         // Get bookable rooms (Frei or Anfrage with available > 0)
         $availableRooms = $travelData->getAvailableRooms();
 

src/Service/TravelDataService.php

@@ -629,6 +629,68 @@ class TravelDataService
         }
     }
 
+    /**
+     * Fetches room prices from the API and patches them onto the travel object.
+     *
+     * This ensures room prices match between local calculation and API validation,
+     * preventing price mismatch errors during booking submission. The API call
+     * takes approximately 4 seconds but is only needed once at booking start.
+     *
+     * @param Travel $travel The travel object to update with fresh room prices
+     */
+    public function patchRoomPricesFromApi(Travel $travel): void
+    {
+        if (null === $travel->dateTo || null === $travel->hotelId) {
+            $this->logger->warning('Cannot fetch room prices: missing dateTo or hotelId', [
+                'travelId' => $travel->id,
+            ]);
+
+            return;
+        }
+
+        try {
+            $result = $this->apiClient->getHotelAvailability($travel->id, $travel->hotelId, $travel->dateTo);
+
+            if ($result instanceof Notification) {
+                $this->logger->warning('API returned notification for room availability', [
+                    'travelId' => $travel->id,
+                    'message' => $result->message,
+                ]);
+
+                return;
+            }
+
+            $apiRooms = $result->getItems();
+            $patchedCount = 0;
+
+            foreach ($travel->rooms as $room) {
+                if (isset($apiRooms[$room->id]) && null !== $apiRooms[$room->id]->price) {
+                    $oldPrice = $room->price;
+                    $room->price = $apiRooms[$room->id]->price;
+
+                    if ($oldPrice !== $room->price) {
+                        $patchedCount++;
+                        $this->logger->debug('Patched room price', [
+                            'roomId' => $room->id,
+                            'oldPrice' => $oldPrice,
+                            'newPrice' => $room->price,
+                        ]);
+                    }
+                }
+            }
+
+            $this->logger->info('Successfully patched room prices from API', [
+                'travelId' => $travel->id,
+                'patchedCount' => $patchedCount,
+            ]);
+        } catch (ApiClientException $e) {
+            $this->logger->error('Failed to fetch room prices from API', [
+                'travelId' => $travel->id,
+                'error' => $e->getMessage(),
+            ]);
+        }
+    }
+
     /**
      * Enrich travel data with additional information.
      *