fix: only invalidate cache and remove draft on successful edit

src/Controller/Booking/Edit/IndexController.php

@@ -408,7 +408,7 @@ class IndexController extends AbstractController
                     'booking_id' => $id,
                     'message' => $response->message,
                 ]);
-            } else {
+            } elseif (true === $response->success) {
                 // Invalidate cache and clear session on success
                 $this->dataLoader->invalidateBookingCache($id);
                 $this->bookingService->clearBookingDto($request, BookingDto::MODE_EDIT);
@@ -423,6 +423,15 @@ class IndexController extends AbstractController
                 ]);
 
                 return $this->redirectToRoute('app_booking_edit', ['id' => $id]);
+            } else {
+                // BookingUpdate received but success is false
+                $this->addFlash('error', $response->status ?? 'Buchung konnte nicht aktualisiert werden');
+                $this->logger->warning('Booking update returned unsuccessful status', [
+                    'email' => $email,
+                    'booking_id' => $id,
+                    'status' => $response->status,
+                    'valid' => $response->valid,
+                ]);
             }
         } catch (TimeoutException $e) {
             $this->addFlash('error', 'Die Anfrage hat zu lange gedauert. Bitte versuchen Sie es erneut.');