feat: update service report exports and calendar bulk downloads

Align service-record PDF/DOCX generation with task-level data and naming.

- Use Task.service_report_note as report note source
- Use Task.scheduled_date for service-record dates
- Rename per-task exports to MT...SN... format
- Add monthly SN/PN ZIP download endpoints with 7-day retention
- Add calendar 'Preuzmi sve' modal with both bulk download actions
- Prefill work-hours day/date from scheduled_date for empty tables
- Remove duplicate note table and clean extra DOCX page breaks

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

backend/modules/fleet/tests/test_work_order_images_endpoint.py

@@ -6,8 +6,10 @@ from django.utils import timezone
 from rest_framework.test import APIClient
 import uuid
 from io import BytesIO
-from datetime import timedelta
+from datetime import date, timedelta
 import zipfile
+from pathlib import Path
+from django.conf import settings
 from PIL import Image
 
 from modules.fleet.models import Vehicle, WorkOrder, WorkOrderInvoice, VehicleServiceRecord, VehicleServicePhoto, GeneratedWorkOrderPdf
@@ -55,13 +57,17 @@ class WorkOrderImagesEndpointTests(TestCase):
         self.work_order = WorkOrder.objects.create(
             vehicle=self.vehicle,
             creator=self.user,
+            display_code='MT150726',
             purpose='kontrola',
+            notes='Napomena iz putnog naloga',
         )
         self.task = Task.objects.create(
             title='Test servisni zadatak',
             assigned_to=self.user,
             vehicle=self.vehicle,
             work_order=self.work_order,
+            scheduled_date=date(2033, 12, 24),
+            service_report_note='Napomena iz taska',
         )
 
         self.service_record = VehicleServiceRecord.objects.create(
@@ -271,3 +277,51 @@ class WorkOrderImagesEndpointTests(TestCase):
         settings_xml = archive.read('word/settings.xml').decode('utf-8')
         self.assertNotIn('documentProtection', settings_xml)
         self.assertNotIn('writeProtection', settings_xml)
+
+    def test_task_specific_service_records_docx_uses_task_note_and_scheduled_date(self):
+        response = self.client.get(
+            f"/api/fleet/work-orders/{self.work_order.pk}/service-records-docx/?task_id={self.task.pk}"
+        )
+        self.assertEqual(response.status_code, 200, response.content)
+        content_disposition = response.get('Content-Disposition', '')
+        self.assertIn('MT150726.SN-Test_servisni_zadatak.docx', content_disposition)
+
+        archive = zipfile.ZipFile(BytesIO(response.content))
+        document_xml = archive.read('word/document.xml').decode('utf-8')
+        self.assertIn('Napomena iz taska', document_xml)
+        self.assertNotIn('Napomena iz putnog naloga', document_xml)
+        self.assertIn('24.12.2033', document_xml)
+        self.assertEqual(document_xml.count('w:type="page"'), 1)
+
+    def test_monthly_service_tasks_archive_returns_zip_with_task_docx(self):
+        response = self.client.get('/api/fleet/reports/monthly-service-tasks-archive/?year=2033&month=12')
+        self.assertEqual(response.status_code, 200, response.content)
+        self.assertEqual(response['Content-Type'], 'application/zip')
+
+        archive = zipfile.ZipFile(BytesIO(response.content))
+        names = archive.namelist()
+        self.assertIn('MT150726.SN-Test_servisni_zadatak.docx', names)
+
+    def test_monthly_work_orders_archive_contains_work_orders_and_invoices_folder(self):
+        WorkOrderInvoice.objects.create(
+            work_order=self.work_order,
+            naziv_racuna='Prosinac račun',
+            datum='2033-12-10',
+            image=create_test_pdf('racun-prosinac.pdf'),
+            created_by=self.user,
+        )
+
+        before_files = set((Path(settings.MEDIA_ROOT) / 'fleet' / 'generated_archives').glob('*.zip'))
+        response = self.client.get('/api/fleet/reports/monthly-work-orders-archive/?year=2033&month=12')
+        self.assertEqual(response.status_code, 200, response.content)
+        self.assertEqual(response['Content-Type'], 'application/zip')
+
+        archive = zipfile.ZipFile(BytesIO(response.content))
+        names = archive.namelist()
+        self.assertIn('MT150726.work-order.pdf', names)
+        self.assertTrue(any(name.startswith('Racuni/MT150726/') for name in names), names)
+
+        generated_archives_dir = Path(settings.MEDIA_ROOT) / 'fleet' / 'generated_archives'
+        self.assertTrue(generated_archives_dir.exists())
+        after_files = set(generated_archives_dir.glob('*.zip'))
+        self.assertTrue(after_files - before_files)