feat: apply season task deadlines to all open checklist entries

src/Controller/Administrative/SeasonAssignment/TaskDeadlineController.php

@@ -46,6 +46,9 @@ class TaskDeadlineController extends AbstractController
         $form->handleRequest($request);
 
         if ($form->isSubmitted() && $form->isValid()) {
+            $applyToAll = true === $form->get('applyToAll')->getData();
+            $appliedCount = $applyToAll ? ($seasonAssignment?->applyDeadlinesToOpenTasks($task) ?? 0) : 0;
+
             $this->entityManager->flush();
 
             $this->logger->info('Change season assignment task deadlines', [
@@ -54,9 +57,13 @@ class TaskDeadlineController extends AbstractController
                 'task' => $task->getTaskKey(),
                 'deadline_override_1' => $task->getDeadlineOverride1()?->format('Y-m-d'),
                 'deadline_override_2' => $task->getDeadlineOverride2()?->format('Y-m-d'),
+                'apply_to_all' => $applyToAll,
+                'applied_count' => $appliedCount,
             ]);
 
-            $this->addFlash('success', 'Die Fristen wurden gespeichert');
+            $this->addFlash('success', $applyToAll
+                ? 'Die Fristen wurden für alle offenen Einträge gespeichert'
+                : 'Die Fristen wurden gespeichert');
 
             return new HxRedirectResponse($returnUrl);
         }