feat: proper determination of agency initiated bookings

For booking that are agency initiated (groups) different rules apply
concerning mutability and requirement of personal data and whether the
first participant is the applicant or not. This commit adds logic to
evaluate the agency id assigned to the booking data to decide.

src/Service/ParticipantCardDataService.php

@@ -36,7 +36,7 @@ class ParticipantCardDataService
         }
 
         // Extract participant name with fallback
-        $name = $this->getParticipantName($participant, $index);
+        $name = $this->getParticipantName($bookingDto, $participant, $index);
 
         // Extract email
         $email = $participant->email ?? '';
@@ -78,7 +78,7 @@ class ParticipantCardDataService
     /**
      * Get participant name with fallback to generic label.
      */
-    private function getParticipantName(object $participant, int $index): string
+    private function getParticipantName(BookingDto $bookingDto, object $participant, int $index): string
     {
         $firstName = $participant->firstName ?? '';
         $lastName = $participant->lastName ?? '';
@@ -86,7 +86,12 @@ class ParticipantCardDataService
         $name = trim($firstName.' '.$lastName);
 
         if ('' === $name) {
-            return 0 === $index ? 'Anmelder:in' : 'Teilnehmer:in';
+            // For internal agency bookings, first participant is not the applicant
+            if (0 === $index && false === $bookingDto->isInternalAgencyBooking()) {
+                return 'Anmelder:in';
+            }
+
+            return 'Teilnehmer:in';
         }
 
         return $name;