fix: do not copy applicant address into participant for agency bookings

src/Service/BookingEditDataLoader.php

@@ -138,13 +138,21 @@ class BookingEditDataLoader
         $this->travelDataService->patchAvailabilities($travelData, $availabilities);
         $this->travelDataService->patchMutability($travelData, $mutableData);
 
-        $formData = $this->bookingDataProcessor->createBookingDtoFromBooking($bookingData, $travelData);
-
-        // Set agency code for internal agency detection (used by field state conditions)
-        $formData->agencyCode = null !== $bookingData->agencyId
+        // Resolve agency code before building the DTO so the internal-agency flag can be
+        // passed to createBookingDtoFromBooking, preventing applicant data from being
+        // copied into participant[0] for agency bookings where they are different people.
+        $agencyCode = null !== $bookingData->agencyId
             ? $this->agencyLoader->loadById($bookingData->agencyId)?->code
             : null;
 
+        $formData = $this->bookingDataProcessor->createBookingDtoFromBooking(
+            $bookingData,
+            $travelData,
+            AgencyLoader::INTERNAL_AGENCY_CODE === $agencyCode,
+        );
+
+        $formData->agencyCode = $agencyCode;
+
         // Set original fingerprint BEFORE applying draft, so dirty detection
         // compares against the original API data (not the draft-modified data)
         $formData->originalFingerprint = $this->fingerprintService->generateFingerprint($formData, true);

src/Service/BookingEditSubmitGuard.php

@@ -34,7 +34,7 @@ class BookingEditSubmitGuard
      */
     public function reconcileImmutableCategories(BookingDto $workingDto, Booking $freshBooking): bool
     {
-        $baselineDto = $this->bookingDataProcessor->createBookingDtoFromBooking($freshBooking, $workingDto->travel);
+        $baselineDto = $this->bookingDataProcessor->createBookingDtoFromBooking($freshBooking, $workingDto->travel, $workingDto->isInternalAgencyBooking());
         // Booking-level D-4 cutoff used as submit-time safety net for rentals.
         $serviceCutoffReachedCondition = new TravelStartCutoffReachedCondition(
             TravelStartCutoffReachedCondition::DEFAULT_DAYS_BEFORE_START