feat: dodaj bilješke widget i admin kalendar/notifikacije

Uveden je novi Notes drawer s kalendar integracijom, zajednički DRY
left-slide mehanizam te međusobno isključivo prikazivanje s Kalendar
widgetom.

Backend i frontend su prošireni za servisne bilješke (uključujući slanje
na više servisera), dodan je users/servicers endpoint, te su uvedene
warning notifikacije kada serviser ima više od 2 zadatka isti dan.

U admin su dodane stavke za Bilješke i zaseban Kalendar zadataka (proxy
TaskCalendar) radi lakšeg operativnog pregleda.

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

backend/modules/fleet/admin.py

@@ -8,6 +8,7 @@ from .models import (
     WorkOrderPhoto,
     WorkOrderInvoice,
     WorkOrderAdditionalCostsTable,
+    ServiceContextNote,
     GeneratedWorkOrderPdf,
     VehicleServiceRecord,
     VehicleServicePhoto,
@@ -205,6 +206,15 @@ class WorkOrderAdditionalCostsTableAdmin(admin.ModelAdmin):
     ordering = ('-updated_at',)
 
 
+@admin.register(ServiceContextNote)
+class ServiceContextNoteAdmin(admin.ModelAdmin):
+    list_display = ('id', 'recipient', 'created_by', 'audience_source', 'note_date', 'is_closed', 'created_at')
+    list_filter = ('audience_source', 'is_closed', 'note_date')
+    search_fields = ('note', 'recipient__email', 'recipient__first_name', 'recipient__last_name', 'created_by__email')
+    readonly_fields = ('created_at', 'updated_at', 'closed_at')
+    ordering = ('is_closed', 'note_date', '-created_at')
+
+
 @admin.register(GeneratedWorkOrderPdf)
 class GeneratedWorkOrderPdfAdmin(admin.ModelAdmin):
     list_display = ('id', 'work_order', 'pdf_type', 'status', 'requested_by', 'expires_at', 'is_active', 'created_at')

backend/modules/fleet/migrations/0032_servicecontextnote.py

@@ -0,0 +1,41 @@
+# Generated by Django 5.2.15 on 2026-07-20 03:05
+
+import uuid
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('task_management', '0010_alter_tasktemplate_status'),
+        ('fleet', '0031_alter_workorderadditionalcoststable_created_at_and_more'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ServiceContextNote',
+            fields=[
+                ('id', models.UUIDField(default=uuid.uuid4, editable=False, help_text='Unikatni identifikator entiteta (UUID).', primary_key=True, serialize=False)),
+                ('created_at', models.DateTimeField(auto_now_add=True, verbose_name='Vrijeme kreiranja')),
+                ('updated_at', models.DateTimeField(auto_now=True, verbose_name='Vrijeme zadnje izmjene')),
+                ('is_active', models.BooleanField(default=True, verbose_name='Aktivan zapis')),
+                ('audience_source', models.CharField(choices=[('self', 'Samo autor'), ('member', 'Odabrani član tima'), ('team', 'Svi članovi tima')], default='self', max_length=16, verbose_name='Publika')),
+                ('note', models.TextField(verbose_name='Bilješka')),
+                ('note_date', models.DateField(blank=True, db_index=True, null=True, verbose_name='Datum podsjetnika')),
+                ('is_closed', models.BooleanField(default=False, verbose_name='Ručno zatvoreno')),
+                ('closed_at', models.DateTimeField(blank=True, null=True, verbose_name='Vrijeme zatvaranja')),
+                ('created_by', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='created_service_context_notes', to=settings.AUTH_USER_MODEL, verbose_name='Kreirao')),
+                ('recipient', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='service_context_notes', to=settings.AUTH_USER_MODEL, verbose_name='Primatelj')),
+                ('task', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='service_context_notes', to='task_management.task', verbose_name='Radni zadatak')),
+                ('work_order', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='service_context_notes', to='fleet.workorder', verbose_name='Putni nalog')),
+            ],
+            options={
+                'verbose_name': 'Bilješka servisnog konteksta',
+                'verbose_name_plural': 'Bilješke servisnog konteksta',
+                'ordering': ['is_closed', 'note_date', '-created_at'],
+            },
+        ),
+    ]

backend/modules/fleet/models.py

@@ -565,4 +565,72 @@ class VehicleNotification(BaseModel):
         ordering = ['-created_at']
 
     def __str__(self):
-        return f"{self.title} -> {self.recipient} ({self.level})"
+        return f"{self.title} -> {self.recipient} ({self.level})"
+
+
+class ServiceContextNote(BaseModel):
+    AUDIENCE_SOURCE_CHOICES = [
+        ('self', 'Samo autor'),
+        ('member', 'Odabrani član tima'),
+        ('team', 'Svi članovi tima'),
+    ]
+
+    created_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name='created_service_context_notes',
+        verbose_name=_("Kreirao"),
+    )
+    recipient = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name='service_context_notes',
+        verbose_name=_("Primatelj"),
+    )
+    audience_source = models.CharField(
+        max_length=16,
+        choices=AUDIENCE_SOURCE_CHOICES,
+        default='self',
+        verbose_name=_("Publika"),
+    )
+    work_order = models.ForeignKey(
+        WorkOrder,
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True,
+        related_name='service_context_notes',
+        verbose_name=_("Putni nalog"),
+    )
+    task = models.ForeignKey(
+        'task_management.Task',
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True,
+        related_name='service_context_notes',
+        verbose_name=_("Radni zadatak"),
+    )
+    note = models.TextField(verbose_name=_("Bilješka"))
+    note_date = models.DateField(
+        null=True,
+        blank=True,
+        db_index=True,
+        verbose_name=_("Datum podsjetnika"),
+    )
+    is_closed = models.BooleanField(default=False, verbose_name=_("Ručno zatvoreno"))
+    closed_at = models.DateTimeField(null=True, blank=True, verbose_name=_("Vrijeme zatvaranja"))
+
+    class Meta:
+        verbose_name = _("Bilješka servisnog konteksta")
+        verbose_name_plural = _("Bilješke servisnog konteksta")
+        ordering = ['is_closed', 'note_date', '-created_at']
+
+    def __str__(self):
+        return f"Note {self.pk} -> {self.recipient_id}"
+
+    def clean(self):
+        super().clean()
+        if self.task_id and self.work_order_id and self.task and self.task.work_order_id:
+            if self.task.work_order_id != self.work_order_id:
+                raise ValidationError({
+                    'task': _("Radni zadatak mora biti povezan s istim putnim nalogom kao bilješka."),
+                })

backend/modules/fleet/serializers.py

@@ -2,11 +2,14 @@ from rest_framework import serializers
 import re
 from pathlib import Path
 from decimal import Decimal, InvalidOperation
+from django.contrib.auth import get_user_model
 from django.urls import reverse
 from django.utils import timezone
+from modules.task_management.models import Task
 from .models import (
     Crane,
     Vehicle,
+    ServiceContextNote,
     VehicleNotification,
     WorkOrder,
     WorkOrderAdditionalCostsTable,
@@ -18,6 +21,8 @@ from .models import (
 )
 from . import services
 
+User = get_user_model()
+
 
 class VehicleSerializer(serializers.ModelSerializer):
     # Čitljivo ime klijenta — read-only, za prikaz u frontendu i adminu
@@ -95,6 +100,134 @@ class VehicleNotificationSerializer(serializers.ModelSerializer):
         read_only_fields = ['id', 'title', 'message', 'metadata', 'level', 'is_sent', 'created_at']
         # is_read is writable via the "mark_read" action, but normally read-only in list
 
+
+class ServiceContextNoteSerializer(serializers.ModelSerializer):
+    created_by_name = serializers.SerializerMethodField()
+    recipient_name = serializers.SerializerMethodField()
+    work_order_label = serializers.SerializerMethodField()
+    task_title = serializers.SerializerMethodField()
+
+    class Meta:
+        model = ServiceContextNote
+        fields = [
+            'id',
+            'created_by',
+            'created_by_name',
+            'recipient',
+            'recipient_name',
+            'audience_source',
+            'work_order',
+            'work_order_label',
+            'task',
+            'task_title',
+            'note',
+            'note_date',
+            'is_closed',
+            'closed_at',
+            'created_at',
+            'updated_at',
+        ]
+        read_only_fields = fields
+
+    def get_created_by_name(self, obj):
+        return obj.created_by.get_full_name() or obj.created_by.email
+
+    def get_recipient_name(self, obj):
+        return obj.recipient.get_full_name() or obj.recipient.email
+
+    def get_work_order_label(self, obj):
+        if not obj.work_order_id:
+            return None
+        display_code = str(getattr(obj.work_order, 'display_code', '') or '').strip().upper()
+        return display_code or f"WO-{obj.work_order_id}"
+
+    def get_task_title(self, obj):
+        if not obj.task_id:
+            return None
+        return obj.task.title
+
+
+class ServiceContextNoteCreateSerializer(serializers.Serializer):
+    AUDIENCE_CHOICES = ['self', 'member', 'team']
+
+    note = serializers.CharField(required=True, allow_blank=False, trim_whitespace=True)
+    note_date = serializers.DateField(required=False, allow_null=True)
+    audience = serializers.ChoiceField(choices=AUDIENCE_CHOICES, default='self')
+    target_user = serializers.PrimaryKeyRelatedField(
+        queryset=User.objects.filter(is_active=True),
+        required=False,
+        allow_null=True,
+    )
+    target_users = serializers.ListField(
+        child=serializers.PrimaryKeyRelatedField(queryset=User.objects.filter(is_active=True)),
+        required=False,
+        allow_empty=False,
+    )
+    work_order = serializers.PrimaryKeyRelatedField(
+        queryset=WorkOrder.objects.filter(is_active=True),
+        required=False,
+        allow_null=True,
+    )
+    task = serializers.PrimaryKeyRelatedField(
+        queryset=Task.objects.filter(is_active=True),
+        required=False,
+        allow_null=True,
+    )
+
+    def validate(self, attrs):
+        request = self.context.get('request')
+        user = getattr(request, 'user', None)
+        if user is None:
+            raise serializers.ValidationError('Autentikacija je obavezna.')
+
+        audience = attrs.get('audience', 'self')
+        target_user = attrs.get('target_user')
+        target_users = attrs.get('target_users') or []
+        work_order = attrs.get('work_order')
+        task = attrs.get('task')
+        note = str(attrs.get('note', '') or '').strip()
+        can_manage_recipients = bool(
+            getattr(user, 'is_serviser', False)
+            or getattr(user, 'is_staff', False)
+            or (getattr(user, 'is_team_member', False) and not getattr(user, 'is_serviser', False))
+        )
+
+        if not note:
+            raise serializers.ValidationError({'note': 'Bilješka ne može biti prazna.'})
+
+        if not can_manage_recipients and audience != 'self':
+            raise serializers.ValidationError({'audience': 'Samo supervisor ili serviser može slati bilješke drugim članovima tima.'})
+        if audience == 'member' and not target_user and len(target_users) == 0:
+            raise serializers.ValidationError({'target_users': 'Odaberite barem jednog servisera.'})
+        if audience in {'self', 'team'} and target_user:
+            raise serializers.ValidationError({'target_user': 'Odabrani tip publike ne koristi ciljano polje člana tima.'})
+        if audience in {'self', 'team'} and len(target_users) > 0:
+            raise serializers.ValidationError({'target_users': 'Odabrani tip publike ne koristi listu servisera.'})
+        if target_user and not getattr(target_user, 'is_serviser', False):
+            raise serializers.ValidationError({'target_user': 'Bilješku je moguće poslati samo serviseru.'})
+        for selected_user in target_users:
+            if not getattr(selected_user, 'is_serviser', False):
+                raise serializers.ValidationError({'target_users': 'Bilješku je moguće poslati samo serviserima.'})
+
+        if work_order:
+            if not work_order.is_active or str(work_order.status or '').lower() != 'open':
+                raise serializers.ValidationError({'work_order': 'Moguće je povezati samo aktivni otvoreni putni nalog.'})
+
+        if task:
+            status = str(task.status or '').lower()
+            if status in {'zavrsen', 'neaktivan'}:
+                raise serializers.ValidationError({'task': 'Moguće je povezati samo aktivni radni zadatak.'})
+
+        if task and work_order and task.work_order_id and str(task.work_order_id) != str(work_order.id):
+            raise serializers.ValidationError({'task': 'Radni zadatak ne pripada odabranom putnom nalogu.'})
+
+        attrs['note'] = note
+        if task and not work_order and task.work_order_id:
+            attrs['work_order'] = task.work_order
+        if audience == 'member' and len(target_users) == 0 and target_user:
+            attrs['target_users'] = [target_user]
+        return attrs
+
 class WorkOrderSerializer(serializers.ModelSerializer):
     crane = serializers.SerializerMethodField()
     crane_label = serializers.SerializerMethodField()

backend/modules/fleet/tests/test_service_context_notes.py

@@ -0,0 +1,134 @@
+import uuid
+
+from django.contrib.auth import get_user_model
+from django.test import TestCase
+from django.urls import reverse
+from rest_framework.test import APIClient
+
+from modules.fleet.models import ServiceContextNote, Vehicle, WorkOrder
+from modules.task_management.models import Task
+
+
+class ServiceContextNotesApiTests(TestCase):
+    def setUp(self):
+        user_model = get_user_model()
+        suffix = uuid.uuid4().hex[:8]
+        self.supervisor = user_model.objects.create_user(
+            username=f'supervisor-{suffix}',
+            email=f'supervisor-{suffix}@example.test',
+            password='test1234',
+            is_team_member=True,
+            is_serviser=False,
+        )
+        self.servicer = user_model.objects.create_user(
+            username=f'servicer-{suffix}',
+            email=f'servicer-{suffix}@example.test',
+            password='test1234',
+            is_team_member=True,
+            is_serviser=True,
+        )
+        self.other = user_model.objects.create_user(
+            username=f'other-{suffix}',
+            email=f'other-{suffix}@example.test',
+            password='test1234',
+            is_team_member=False,
+            is_serviser=False,
+        )
+        self.second_servicer = user_model.objects.create_user(
+            username=f'servicer2-{suffix}',
+            email=f'servicer2-{suffix}@example.test',
+            password='test1234',
+            is_team_member=True,
+            is_serviser=True,
+        )
+
+        self.vehicle = Vehicle.objects.create(
+            asset_type='crane',
+            registration_number=f'SN-{suffix[:6].upper()}',
+            crane_serial_number='654321',
+            assigned_servicer=self.servicer,
+        )
+        self.work_order = WorkOrder.objects.create(
+            vehicle=self.vehicle,
+            creator=self.supervisor,
+            purpose='kontrola',
+            status='open',
+        )
+        self.task = Task.objects.create(
+            title='Aktivni servis',
+            assigned_to=self.servicer,
+            vehicle=self.vehicle,
+            work_order=self.work_order,
+            status='aktivan',
+        )
+
+        self.client = APIClient()
+
+    def test_supervisor_can_create_team_note_for_active_context(self):
+        self.client.force_authenticate(user=self.supervisor)
+        response = self.client.post(
+            reverse('service-context-note-list'),
+            data={
+                'note': 'Provjeriti opremu prije izlaska na teren.',
+                'note_date': '2026-07-21',
+                'audience': 'team',
+                'work_order': str(self.work_order.id),
+                'task': str(self.task.id),
+            },
+            format='json',
+        )
+        self.assertEqual(response.status_code, 201, response.content)
+        self.assertGreaterEqual(int(response.data.get('created_count', 0)), 2)
+
+        self.client.force_authenticate(user=self.servicer)
+        list_response = self.client.get(reverse('service-context-note-list'))
+        self.assertEqual(list_response.status_code, 200, list_response.content)
+        self.assertEqual(len(list_response.data), 1)
+        self.assertEqual(list_response.data[0]['audience_source'], 'team')
+        self.assertEqual(str(list_response.data[0]['task']), str(self.task.id))
+
+    def test_servicer_can_create_member_note_for_other_servicer(self):
+        self.client.force_authenticate(user=self.servicer)
+        response = self.client.post(
+            reverse('service-context-note-list'),
+            data={
+                'note': 'Serviser šalje bilješku drugom serviseru.',
+                'audience': 'member',
+                'target_user': str(self.second_servicer.id),
+            },
+            format='json',
+        )
+        self.assertEqual(response.status_code, 201, response.content)
+        self.assertEqual(int(response.data.get('created_count', 0)), 1)
+
+    def test_recipient_can_close_personal_note(self):
+        note = ServiceContextNote.objects.create(
+            created_by=self.supervisor,
+            recipient=self.servicer,
+            audience_source='member',
+            note='Osobna bilješka',
+        )
+        self.client.force_authenticate(user=self.servicer)
+        close_url = reverse('service-context-note-close', kwargs={'pk': note.id})
+        close_response = self.client.post(close_url, data={}, format='json')
+        self.assertEqual(close_response.status_code, 200, close_response.content)
+        note.refresh_from_db()
+        self.assertTrue(note.is_closed)
+
+        list_response = self.client.get(reverse('service-context-note-list'))
+        self.assertEqual(list_response.status_code, 200)
+        self.assertEqual(len(list_response.data), 0)
+
+    def test_supervisor_can_target_multiple_servicers(self):
+        self.client.force_authenticate(user=self.supervisor)
+        response = self.client.post(
+            reverse('service-context-note-list'),
+            data={
+                'note': 'Zajednička bilješka za dva servisera.',
+                'audience': 'member',
+                'target_users': [str(self.servicer.id), str(self.second_servicer.id)],
+            },
+            format='json',
+        )
+        self.assertEqual(response.status_code, 201, response.content)
+        self.assertEqual(int(response.data.get('created_count', 0)), 2)

backend/modules/fleet/urls.py

@@ -2,7 +2,7 @@ from rest_framework.routers import DefaultRouter
 from django.urls import path
 from .views import (
     CraneViewSet, VehicleViewSet, WorkOrderViewSet, VehicleServiceRecordViewSet,
-    WorkOrderInvoiceViewSet, VehicleNotificationViewSet, VehicleServicePhotoViewSet, VehicleServiceAttachmentViewSet, pusher_auth,
+    WorkOrderInvoiceViewSet, ServiceContextNoteViewSet, VehicleNotificationViewSet, VehicleServicePhotoViewSet, VehicleServiceAttachmentViewSet, pusher_auth,
 )
 
 router = DefaultRouter()
@@ -10,6 +10,7 @@ router.register(r'vehicles', VehicleViewSet, basename='vehicle')
 router.register(r'cranes', CraneViewSet, basename='crane')
 router.register(r'work-orders', WorkOrderViewSet, basename='workorder')
 router.register(r'work-order-invoices', WorkOrderInvoiceViewSet, basename='work-order-invoice')
+router.register(r'service-notes', ServiceContextNoteViewSet, basename='service-context-note')
 router.register(r'service-records', VehicleServiceRecordViewSet, basename='service-record')
 router.register(r'notifications', VehicleNotificationViewSet, basename='vehicle-notification')
 router.register(r'service-photos', VehicleServicePhotoViewSet, basename='service-photo')

backend/modules/fleet/views.py

@@ -2,9 +2,11 @@
 
 from io import BytesIO
 import base64
+from collections import OrderedDict
 from datetime import timedelta
 from pathlib import Path
 from decimal import Decimal, InvalidOperation
+from django.contrib.auth import get_user_model
 
 from PIL import Image, UnidentifiedImageError
 from django.conf import settings
@@ -14,6 +16,7 @@ from django.urls import reverse
 from django.utils import timezone
 from django.utils.html import escape
 from django.db.models import Q
+from django.db import transaction
 from reportlab.lib.pagesizes import A4
 from reportlab.lib import colors
 from reportlab.lib.utils import ImageReader
@@ -21,7 +24,7 @@ from reportlab.lib.styles import getSampleStyleSheet
 from reportlab.pdfgen import canvas
 from reportlab.platypus import Table, TableStyle, Paragraph
 from .pdf_layout import register_unicode_fonts, draw_standard_header_footer
-from rest_framework import viewsets, permissions, status
+from rest_framework import viewsets, permissions, status, mixins
 from rest_framework.decorators import action, api_view, permission_classes
 from rest_framework.response import Response
 from rest_framework.exceptions import PermissionDenied, ValidationError as DRFValidationError
@@ -32,6 +35,7 @@ from .models import (
     Crane,
     Vehicle,
     VehicleNotification,
+    ServiceContextNote,
     WorkOrder,
     WorkOrderPhoto,
     GeneratedWorkOrderPdf,
@@ -50,6 +54,8 @@ from .serializers import (
     WorkOrderPhotoSerializer,
     VehicleServiceRecordSerializer,
     VehicleNotificationSerializer,
+    ServiceContextNoteSerializer,
+    ServiceContextNoteCreateSerializer,
     VehicleServicePhotoSerializer,
     VehicleServiceAttachmentSerializer,
 )
@@ -67,6 +73,7 @@ from .tasks import (
 )
 
 register_unicode_fonts()
+User = get_user_model()
 
 def _fleet_assets_queryset_for_user(user, model, *, asset_type=None):
     queryset = model.objects.select_related('client', 'assigned_servicer').filter(is_active=True)
@@ -99,6 +106,23 @@ def _work_orders_queryset_for_user(user):
     return queryset.filter(creator=user)
 
 
+def _is_supervisor_user(user):
+    return bool(getattr(user, 'is_staff', False) or (getattr(user, 'is_team_member', False) and not getattr(user, 'is_serviser', False)))
+
+
+def _active_team_members_queryset():
+    return User.objects.filter(is_active=True, is_team_member=True).order_by('first_name', 'last_name', 'email')
+
+
+def _service_context_notes_queryset_for_user(user):
+    return (
+        ServiceContextNote.objects
+        .select_related('created_by', 'recipient', 'work_order', 'task')
+        .filter(is_active=True, recipient=user, is_closed=False)
+        .order_by('note_date', '-created_at')
+    )
+
+
 def _work_order_related_tasks_queryset(work_order):
     from modules.task_management.models import Task
 
@@ -1994,6 +2018,110 @@ class WorkOrderInvoiceViewSet(viewsets.ModelViewSet):
         instance.is_active = False
         instance.save(update_fields=['is_active'])
 
+
+class ServiceContextNoteViewSet(
+    mixins.ListModelMixin,
+    mixins.CreateModelMixin,
+    viewsets.GenericViewSet,
+):
+    permission_classes = [permissions.IsAuthenticated]
+
+    def get_queryset(self):
+        return _service_context_notes_queryset_for_user(self.request.user)
+
+    def get_serializer_class(self):
+        if self.action == 'create':
+            return ServiceContextNoteCreateSerializer
+        return ServiceContextNoteSerializer
+
+    def create(self, request, *args, **kwargs):
+        serializer = self.get_serializer(data=request.data, context={'request': request})
+        serializer.is_valid(raise_exception=True)
+        payload = serializer.validated_data
+        user = request.user
+        audience = payload.get('audience', 'self')
+        target_users = payload.get('target_users') or []
+        note_text = payload.get('note')
+        note_date = payload.get('note_date')
+        work_order = payload.get('work_order')
+        task = payload.get('task')
+        is_supervisor = _is_supervisor_user(user)
+        can_manage_recipients = bool(is_supervisor or getattr(user, 'is_serviser', False))
+
+        if work_order and not _work_orders_queryset_for_user(user).filter(pk=work_order.pk).exists():
+            raise DRFValidationError({'work_order': 'Nemate dozvolu za odabrani putni nalog.'})
+        if task and not is_supervisor and str(getattr(task, 'assigned_to_id', '') or '') != str(user.id):
+            raise DRFValidationError({'task': 'Možete povezati samo svoj aktivni radni zadatak.'})
+
+        recipients = []
+        if audience == 'self':
+            recipients = [user]
+        elif audience == 'member':
+            recipients = list(target_users)
+        else:
+            if not can_manage_recipients:
+                raise DRFValidationError({'audience': 'Nemate dozvolu za slanje bilješke cijelom timu.'})
+            recipients = list(_active_team_members_queryset())
+            if not recipients:
+                raise DRFValidationError({'audience': 'Nema aktivnih članova tima za slanje bilješke.'})
+
+        created_notes = []
+        seen = OrderedDict()
+        for recipient in recipients:
+            seen[str(recipient.id)] = recipient
+        with transaction.atomic():
+            for recipient in seen.values():
+                note = ServiceContextNote.objects.create(
+                    created_by=user,
+                    recipient=recipient,
+                    audience_source=audience,
+                    work_order=work_order,
+                    task=task,
+                    note=note_text,
+                    note_date=note_date,
+                )
+                created_notes.append(note)
+                NotificationService.create_notification(
+                    recipient=recipient,
+                    title='Nova bilješka servisnog konteksta',
+                    message=note_text[:255],
+                    level='info',
+                    metadata={
+                        'entity_type': 'service_note',
+                        'service_note_id': str(note.id),
+                        'work_order_id': str(work_order.id) if work_order else None,
+                        'task_id': str(task.id) if task else None,
+                        'section': 'dashboard',
+                        'note_date': note_date.isoformat() if note_date else None,
+                    },
+                    send_email=False,
+                )
+
+        response_serializer = ServiceContextNoteSerializer(
+            _service_context_notes_queryset_for_user(user)[:20],
+            many=True,
+        )
+        return Response(
+            {
+                'created_count': len(created_notes),
+                'notes': response_serializer.data,
+            },
+            status=status.HTTP_201_CREATED,
+        )
+
+    @action(detail=True, methods=['post'], url_path='close')
+    def close(self, request, pk=None):
+        note = self.get_object()
+        if note.is_closed:
+            serializer = ServiceContextNoteSerializer(note)
+            return Response(serializer.data, status=status.HTTP_200_OK)
+        note.is_closed = True
+        note.closed_at = timezone.now()
+        note.save(update_fields=['is_closed', 'closed_at', 'updated_at'])
+        serializer = ServiceContextNoteSerializer(note)
+        return Response(serializer.data, status=status.HTTP_200_OK)
+
+
 class VehicleNotificationViewSet(viewsets.ReadOnlyModelViewSet):
     """
     List all notifications for the authenticated user and provide an action

backend/modules/task_management/admin.py

@@ -2,7 +2,7 @@
 
 from django.contrib import admin
 
-from .models import Task, TaskTemplate, TaskTemplateEntry, TaskWorkEntry, TaskWorkHoursTable
+from .models import Task, TaskCalendar, TaskTemplate, TaskTemplateEntry, TaskWorkEntry, TaskWorkHoursTable
 
 
 class TaskWorkEntryInline(admin.TabularInline):
@@ -33,6 +33,19 @@ class TaskAdmin(admin.ModelAdmin):
     inlines = (TaskWorkHoursTableInline, TaskWorkEntryInline)
 
 
+@admin.register(TaskCalendar)
+class TaskCalendarAdmin(admin.ModelAdmin):
+    list_display = ('scheduled_date', 'title', 'status', 'assigned_to', 'vehicle', 'work_order')
+    list_filter = ('scheduled_date', 'status', 'assigned_to')
+    search_fields = ('title', 'assigned_to__email', 'vehicle__registration_number', 'work_order__display_code')
+    readonly_fields = ('id', 'created_at', 'updated_at')
+    ordering = ('scheduled_date', 'assigned_to__first_name', 'assigned_to__last_name')
+
+    def get_queryset(self, request):
+        queryset = super().get_queryset(request)
+        return queryset.filter(is_active=True, scheduled_date__isnull=False)
+
+
 @admin.register(TaskTemplate)
 class TaskTemplateAdmin(admin.ModelAdmin):
     list_display = ('code', 'title', 'status', 'is_active', 'created_at')

backend/modules/task_management/models.py

@@ -69,6 +69,13 @@ class Task(BaseModel):
             })
 
 
+class TaskCalendar(Task):
+    class Meta:
+        proxy = True
+        verbose_name = _("Kalendar zadatka")
+        verbose_name_plural = _("Kalendar zadataka")
+
+
 class TaskWorkHoursTable(BaseModel):
     """Interaktivna tablica radnih sati povezana s radnim zadatkom."""
 

backend/modules/task_management/services.py

@@ -1,8 +1,9 @@
 # backend/modules/task_management/services.py
 
-from django.db import transaction
+from django.db import transaction, models
 from rest_framework.exceptions import ValidationError
 from django.core.exceptions import ValidationError as DjangoValidationError
+from django.contrib.auth import get_user_model
 import logging
 
 from .models import Task, TaskTemplate, TaskWorkEntry
@@ -10,6 +11,21 @@ from .exceptions import OpenWorkOrderBlockingTaskClose
 from modules.fleet.models import VehicleServiceRecord
 
 logger = logging.getLogger(__name__)
+User = get_user_model()
+
+
+def _task_overload_recipients(task):
+    recipients = []
+    if task.assigned_to_id:
+        recipients.append(task.assigned_to)
+    supervisors = User.objects.filter(is_active=True).filter(
+        models.Q(is_staff=True) | (models.Q(is_team_member=True) & models.Q(is_serviser=False))
+    )
+    recipients.extend(supervisors)
+    unique = {}
+    for recipient in recipients:
+        unique[str(recipient.id)] = recipient
+    return list(unique.values())
 
 
 class TaskService:
@@ -53,6 +69,7 @@ class TaskService:
 
         with transaction.atomic():
             entry.save()
+            TaskService._notify_if_servicer_overloaded(entry)
             if template:
                 TaskService._create_work_entries_from_template(task=entry, template=template)
                 TaskService._create_service_records_from_template(task=entry, template=template, user=user)
@@ -60,6 +77,49 @@ class TaskService:
         logger.info(f"Zadatak uspješno kreiran: {entry.id}")
         return entry
 
+    @staticmethod
+    def _notify_if_servicer_overloaded(entry: Task):
+        if not entry.assigned_to_id or not entry.scheduled_date:
+            return
+        if not getattr(entry.assigned_to, 'is_serviser', False):
+            return
+
+        task_count = Task.objects.filter(
+            is_active=True,
+            assigned_to=entry.assigned_to,
+            scheduled_date=entry.scheduled_date,
+            status__in=('aktivan', 'servis', 'spreman_za_zavrsetak'),
+        ).count()
+        if task_count <= 2:
+            return
+
+        from modules.fleet.services import NotificationService
+
+        schedule_label = entry.scheduled_date.strftime('%d.%m.%Y')
+        title = f"Preopterećenje rasporeda: {entry.assigned_to.get_full_name() or entry.assigned_to.email}"
+        message = (
+            f"Serviseru {entry.assigned_to.get_full_name() or entry.assigned_to.email} "
+            f"je dodijeljeno {task_count} zadatka za {schedule_label}. "
+            f"Sustav je dopustio i dodatni zadatak."
+        )
+        metadata = {
+            "entity_type": "task_overload",
+            "assigned_to_id": str(entry.assigned_to_id),
+            "task_id": str(entry.id),
+            "scheduled_date": entry.scheduled_date.isoformat(),
+            "task_count": task_count,
+            "section": "dashboard",
+        }
+        for recipient in _task_overload_recipients(entry):
+            NotificationService.create_notification(
+                recipient=recipient,
+                title=title,
+                message=message,
+                level='warning',
+                send_email=False,
+                metadata=metadata,
+            )
+
     @staticmethod
     def _create_work_entries_from_template(*, task: Task, template: TaskTemplate):
         template_entries = list(template.entries.filter(is_active=True).order_by('sort_order', 'created_at')[:10])

backend/modules/task_management/tests/test_services.py

@@ -1,5 +1,7 @@
 from django.test import TestCase
 from django.contrib.auth import get_user_model
+from unittest.mock import patch
+from datetime import date
 from rest_framework.exceptions import ValidationError
 from modules.task_management.services import TaskService
 from modules.task_management.exceptions import OpenWorkOrderBlockingTaskClose
@@ -192,4 +194,76 @@ class TaskServiceTests(TestCase):
         )
 
         self.assertEqual(TaskWorkEntry.objects.filter(task=created).count(), 10)
-        self.assertEqual(VehicleServiceRecord.objects.filter(task=created).count(), 10)
+        self.assertEqual(VehicleServiceRecord.objects.filter(task=created).count(), 10)
+
+    @patch('modules.fleet.services.NotificationService.create_notification')
+    def test_create_task_entry_sends_overload_notifications_after_two_tasks(self, mock_notify):
+        servicer = get_user_model().objects.create_user(
+            username='servicer-overload',
+            email='servicer-overload@example.test',
+            password='test1234',
+            is_serviser=True,
+            is_team_member=True,
+        )
+        supervisor = get_user_model().objects.create_user(
+            username='supervisor-overload',
+            email='supervisor-overload@example.test',
+            password='test1234',
+            is_team_member=True,
+            is_serviser=False,
+        )
+        vehicle = Vehicle.objects.create(registration_number="ZG-TASK-OVER1", asset_type='crane')
+        scheduled = date(2026, 7, 21)
+
+        Task.objects.create(title="Postojeći 1", assigned_to=servicer, vehicle=vehicle, status='aktivan', scheduled_date=scheduled)
+        Task.objects.create(title="Postojeći 2", assigned_to=servicer, vehicle=vehicle, status='servis', scheduled_date=scheduled)
+
+        TaskService.create_task_entry(
+            data={
+                "title": "Treći task",
+                "status": "aktivan",
+                "assigned_to": servicer,
+                "vehicle": vehicle,
+                "scheduled_date": scheduled,
+            },
+            user=self.staff,
+        )
+
+        recipients = [call.kwargs.get('recipient') for call in mock_notify.call_args_list]
+        recipient_ids = {str(recipient.id) for recipient in recipients if recipient}
+        self.assertIn(str(servicer.id), recipient_ids)
+        self.assertIn(str(supervisor.id), recipient_ids)
+
+    @patch('modules.fleet.services.NotificationService.create_notification')
+    def test_create_task_entry_does_not_send_overload_notifications_when_two_or_less(self, mock_notify):
+        servicer = get_user_model().objects.create_user(
+            username='servicer-normal-load',
+            email='servicer-normal-load@example.test',
+            password='test1234',
+            is_serviser=True,
+            is_team_member=True,
+        )
+        vehicle = Vehicle.objects.create(registration_number="ZG-TASK-OVER2", asset_type='crane')
+        scheduled = date(2026, 7, 21)
+
+        TaskService.create_task_entry(
+            data={
+                "title": "Prvi task",
+                "status": "aktivan",
+                "assigned_to": servicer,
+                "vehicle": vehicle,
+                "scheduled_date": scheduled,
+            },
+            user=self.staff,
+        )
+        TaskService.create_task_entry(
+            data={
+                "title": "Drugi task",
+                "status": "aktivan",
+                "assigned_to": servicer,
+                "vehicle": vehicle,
+                "scheduled_date": scheduled,
+            },
+            user=self.staff,
+        )
+        self.assertEqual(mock_notify.call_count, 0)