Update checklist sync without hard resets

tests/Feature/Projects/ProjectTicketControllerTest.php

@@ -579,6 +579,88 @@ class ProjectTicketControllerTest extends TestCase
         ]);
     }
 
+    public function test_ticket_update_reuses_acceptance_criteria_ids_when_provided(): void
+    {
+        $editor = User::factory()->create();
+        $project = Project::factory()->create([
+            'key' => 'CORE',
+        ]);
+
+        app(InitializeProjectTicketMetadata::class)->handle($project);
+
+        $priority = $project->ticketPriorities()->firstOrFail();
+        $ticketType = $this->nonParentType($project);
+        $ticket = Ticket::factory()->create([
+            'project_id' => $project->id,
+            'sequence_number' => 1,
+            'ticket_key' => 'CORE-1',
+            'ticket_priority_id' => $priority->id,
+            'ticket_type_id' => $ticketType->id,
+            'title' => 'Acceptance criteria update test',
+        ]);
+        $rootCriterion = AcceptanceCriterion::query()->create([
+            'ticket_id' => $ticket->id,
+            'parent_acceptance_criterion_id' => null,
+            'position' => 0,
+            'text' => 'Original root item',
+            'is_checked' => false,
+        ]);
+        $childCriterion = AcceptanceCriterion::query()->create([
+            'ticket_id' => $ticket->id,
+            'parent_acceptance_criterion_id' => $rootCriterion->id,
+            'position' => 0,
+            'text' => 'Original child item',
+            'is_checked' => false,
+        ]);
+
+        $this->syncProjectPermissions($project, $editor, ['write', 'view']);
+
+        $this->actingAs($editor)
+            ->patch(route('projects.tickets.update', [$project, $ticket]), [
+                'acceptance_criteria' => [
+                    [
+                        'id' => $rootCriterion->id,
+                        'text' => 'Updated root item',
+                        'checked' => true,
+                        'indent' => 0,
+                    ],
+                    [
+                        'id' => $childCriterion->id,
+                        'text' => 'Updated child item',
+                        'checked' => false,
+                        'indent' => 1,
+                    ],
+                ],
+                'blocked_comment' => $ticket->blocked_comment,
+                'description' => $ticket->description,
+                'field_values' => [],
+                'is_blocked' => $ticket->is_blocked,
+                'parent_ticket_id' => $ticket->parent_ticket_id,
+                'story_points' => $ticket->story_points,
+                'ticket_priority_id' => $priority->id,
+                'ticket_type_id' => $ticketType->id,
+                'title' => $ticket->title,
+            ])
+            ->assertRedirect(route('projects.tickets.show', [$project, $ticket]));
+
+        $this->assertDatabaseHas('acceptance_criteria', [
+            'id' => $rootCriterion->id,
+            'ticket_id' => $ticket->id,
+            'parent_acceptance_criterion_id' => null,
+            'position' => 0,
+            'text' => 'Updated root item',
+            'is_checked' => true,
+        ]);
+        $this->assertDatabaseHas('acceptance_criteria', [
+            'id' => $childCriterion->id,
+            'ticket_id' => $ticket->id,
+            'parent_acceptance_criterion_id' => $rootCriterion->id,
+            'position' => 0,
+            'text' => 'Updated child item',
+            'is_checked' => false,
+        ]);
+    }
+
     /**
      * Ensure non-parent tickets cannot be assigned as a parent target.
      */