feat: apply season task deadlines to all open checklist entries

tests/Entity/SeasonAssignmentTest.php

@@ -6,6 +6,7 @@ namespace App\Tests\Entity;
 
 use App\Entity\JobProfile;
 use App\Entity\SeasonAssignment;
+use App\Entity\SeasonAssignmentTask;
 use App\Entity\Teamer;
 use PHPUnit\Framework\TestCase;
 
@@ -100,4 +101,43 @@ class SeasonAssignmentTest extends TestCase
         $this->assertSame('2027-04-30', $seasonAssignment->getDateTo()->format('Y-m-d'));
         $this->assertSame('AGR', $seasonAssignment->getHotelCode());
     }
+
+    public function testApplyingDeadlinesCopiesBothOverridesOntoOpenEntriesOnly(): void
+    {
+        $seasonAssignment = new SeasonAssignment();
+        $source = (new SeasonAssignmentTask())
+            ->setDeadlineOverride1(new \DateTimeImmutable('2026-11-15'))
+            ->setDeadlineOverride2(new \DateTimeImmutable('2026-11-30'));
+        $open = new SeasonAssignmentTask();
+        $done = (new SeasonAssignmentTask())
+            ->setDone(true)
+            ->setDeadlineOverride1(new \DateTimeImmutable('2026-10-01'));
+        $seasonAssignment->addTask($source)->addTask($open)->addTask($done);
+
+        $this->assertSame(1, $seasonAssignment->applyDeadlinesToOpenTasks($source));
+
+        $this->assertSame('2026-11-15', $open->getDeadlineOverride1()?->format('Y-m-d'));
+        $this->assertSame('2026-11-30', $open->getDeadlineOverride2()?->format('Y-m-d'));
+        $this->assertSame('2026-10-01', $done->getDeadlineOverride1()?->format('Y-m-d'));
+        $this->assertNull($done->getDeadlineOverride2());
+    }
+
+    /**
+     * Empty fields are applied as well: that is how the office resets every entry to its
+     * computed deadline in one go.
+     */
+    public function testApplyingEmptyDeadlinesResetsTheOverrides(): void
+    {
+        $seasonAssignment = new SeasonAssignment();
+        $source = new SeasonAssignmentTask();
+        $other = (new SeasonAssignmentTask())
+            ->setDeadlineOverride1(new \DateTimeImmutable('2026-11-15'))
+            ->setDeadlineOverride2(new \DateTimeImmutable('2026-11-30'));
+        $seasonAssignment->addTask($source)->addTask($other);
+
+        $seasonAssignment->applyDeadlinesToOpenTasks($source);
+
+        $this->assertNull($other->getDeadlineOverride1());
+        $this->assertNull($other->getDeadlineOverride2());
+    }
 }