feat: inform user about automatic reassignments or reset selections

src/Form/Model/ParticipantDto.php

@@ -77,6 +77,11 @@ class ParticipantDto
     // Bulk insurance booking flag (applicant only: when checked, assigns same insurance type to all participants)
     public bool $bulkInsuranceBooking = false;
 
+    /**
+     * @var array<array{type: string, message: string}> Notification messages for user feedback
+     */
+    public array $notifications = [];
+
     public static function fromPersonalData(PersonalData $personalData): static
     {
         $instance = new static();
@@ -164,4 +169,18 @@ class ParticipantDto
     {
         return $this->insurance?->price ?? 0.0;
     }
+
+    /**
+     * Adds a notification message for user feedback.
+     *
+     * @param string $type    The notification type (info, warning, success)
+     * @param string $message The notification message
+     */
+    public function addNotification(string $type, string $message): void
+    {
+        $this->notifications[] = [
+            'type' => $type,
+            'message' => $message,
+        ];
+    }
 }