feat: integritet zatvaranja taska i putnog naloga

Dodaje status 'spreman_za_zavrsetak' i backend provjeru koja blokira zatvaranje taska kada je povezani putni nalog otvoren, uz 409 odgovor i opcionalni auto-close flow.\n\nPri zatvaranju putnog naloga taskovi u statusu 'servis' automatski prelaze u 'spreman_za_zavrsetak'. Frontend modal sada podržava potvrdu i retry s auto_close_work_order=true.\n\nUključeni su i ciljani testovi za novi behavior, te ažuriran prikaz statusa u dashboardu.\n\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

backend/modules/task_management/tests/test_services.py

@@ -2,6 +2,7 @@ from django.test import TestCase
 from django.contrib.auth import get_user_model
 from rest_framework.exceptions import ValidationError
 from modules.task_management.services import TaskService
+from modules.task_management.exceptions import OpenWorkOrderBlockingTaskClose
 from modules.task_management.models import Task, TaskTemplate, TaskTemplateEntry, TaskWorkEntry
 from modules.fleet.models import Vehicle, WorkOrder, VehicleServiceRecord
 
@@ -42,7 +43,14 @@ class TaskServiceTests(TestCase):
 
     def test_update_task_entry_allows_closing_with_work_order(self):
         vehicle = Vehicle.objects.create(registration_number="ZG-TASK-01", asset_type='crane')
-        work_order = WorkOrder.objects.create(vehicle=vehicle, creator=self.user, purpose='defektaza')
+        work_order = WorkOrder.objects.create(
+            vehicle=vehicle,
+            creator=self.user,
+            purpose='defektaza',
+            status='closed',
+            start_mileage=100,
+            end_mileage=120,
+        )
         task = Task.objects.create(title="Za zatvaranje", description="", assigned_to=self.user, status='servis')
         updated = TaskService.update_task_entry(
             instance=task,
@@ -59,7 +67,14 @@ class TaskServiceTests(TestCase):
 
     def test_update_task_entry_allows_finished_with_work_order(self):
         vehicle = Vehicle.objects.create(registration_number="ZG-TASK-01A", asset_type='crane')
-        work_order = WorkOrder.objects.create(vehicle=vehicle, creator=self.user, purpose='kontrola')
+        work_order = WorkOrder.objects.create(
+            vehicle=vehicle,
+            creator=self.user,
+            purpose='kontrola',
+            status='closed',
+            start_mileage=100,
+            end_mileage=150,
+        )
         task = Task.objects.create(title="Za završetak", description="", assigned_to=self.user, status='servis', vehicle=vehicle)
         updated = TaskService.update_task_entry(
             instance=task,
@@ -69,6 +84,53 @@ class TaskServiceTests(TestCase):
         assert updated.status == "zavrsen"
         assert updated.work_order == work_order
 
+    def test_update_task_entry_blocks_closing_when_work_order_open(self):
+        vehicle = Vehicle.objects.create(registration_number="ZG-TASK-01B", asset_type='crane')
+        work_order = WorkOrder.objects.create(vehicle=vehicle, creator=self.user, purpose='kontrola', status='open')
+        task = Task.objects.create(
+            title="Integritet",
+            description="",
+            assigned_to=self.user,
+            status='servis',
+            vehicle=vehicle,
+            work_order=work_order,
+        )
+
+        with self.assertRaises(OpenWorkOrderBlockingTaskClose):
+            TaskService.update_task_entry(
+                instance=task,
+                data={"status": "zavrsen"},
+                user=self.user,
+            )
+
+    def test_update_task_entry_can_auto_close_open_work_order(self):
+        vehicle = Vehicle.objects.create(registration_number="ZG-TASK-01C", asset_type='crane')
+        work_order = WorkOrder.objects.create(
+            vehicle=vehicle,
+            creator=self.user,
+            purpose='kontrola',
+            status='open',
+            start_mileage=100,
+            end_mileage=150,
+        )
+        task = Task.objects.create(
+            title="Auto close",
+            description="",
+            assigned_to=self.user,
+            status='servis',
+            vehicle=vehicle,
+            work_order=work_order,
+        )
+        updated = TaskService.update_task_entry(
+            instance=task,
+            data={"status": "zavrsen"},
+            user=self.user,
+            auto_close_work_order=True,
+        )
+        work_order.refresh_from_db()
+        self.assertEqual(updated.status, "zavrsen")
+        self.assertEqual(work_order.status, "closed")
+
     def test_create_task_entry_from_template_creates_service_records(self):
         vehicle = Vehicle.objects.create(registration_number="ZG-TASK-02", asset_type='crane')
         template = TaskTemplate.objects.create(

backend/modules/task_management/tests/test_views.py

@@ -47,7 +47,12 @@ class TaskViewSetTests(TestCase):
         serializer.instance = task
 
         self.view.perform_update(serializer)
-        mock_update.assert_called_once_with(instance=task, data=serializer.validated_data, user=self.view.request.user)
+        mock_update.assert_called_once_with(
+            instance=task,
+            data=serializer.validated_data,
+            user=self.view.request.user,
+            auto_close_work_order=False,
+        )
         # confirm instance saved with new title
         task.refresh_from_db()
         assert task.title == "Updated"