Add plugin platform with modular backend and frontend registry.

Split graph/import/meta into Django apps, add API v1 with OpenAPI and pytest, and introduce plugin registry with the tags reference plugin on both FE and BE.

Co-authored-by: Cursor <cursoragent@cursor.com>

README.md

@@ -44,17 +44,25 @@ docker compose up --build
 ## Архитектура frontend
 
 ```text
-views / components
+views / features / components
        ↓
 Pinia store (orchestration)
        ↓
-application/usecases
+application/usecases + application/services
        ↓
 infrastructure/repositories  →  local (IndexedDB) | remote (REST)
        ↓
-changelog + syncAdapter (noop, подготовка к sync)
+core/pluginRegistry + plugins/* (optional extensions)
+       ↓
+changelog + syncAdapter (hybrid-ready)
 ```
 
+API v1: `/api/v1/` (legacy `/api/` сохранён). OpenAPI: `/api/v1/docs/`.
+
+Плагины: `VITE_ENABLED_PLUGINS=tags` (frontend), `ENABLED_PLUGINS=tags` (backend).
+
+Документация для авторов плагинов: [docs/PLUGIN_AUTHOR_GUIDE.md](docs/PLUGIN_AUTHOR_GUIDE.md).
+
 ## Структура проекта
 
 ```text
@@ -92,6 +100,8 @@ social-graph/
 | GET | `/api/network-map-graph/` | Граф карты сети |
 | GET | `/api/relation-types/` | Типы связей |
 | GET | `/api/network-map-choices/` | Справочники карты |
+| GET | `/api/v1/meta/choices/` | Все справочники (типы связей, сферы, круги) |
+| GET | `/api/v1/plugins/` | Манифест включённых плагинов |
 | POST | `/api/import/` | Импорт CSV/JSON/vCard (legacy) |
 
 В режиме `local` импорт и бэкап выполняются в браузере (экран **Импорт**).

backend/api/__init__.py

@@ -0,0 +1 @@
+

backend/api/v1/__init__.py

@@ -0,0 +1 @@
+

backend/api/v1/urls.py

@@ -0,0 +1,32 @@
+from django.urls import path, include
+from rest_framework.routers import DefaultRouter
+
+from contacts import views as contact_views
+
+router = DefaultRouter()
+router.register('contacts', contact_views.ContactViewSet)
+router.register('relations', contact_views.RelationViewSet)
+router.register('network-maps', contact_views.NetworkMapViewSet)
+
+urlpatterns = [
+    path('', include(router.urls)),
+    path(
+        'network-maps/<int:map_pk>/memberships/',
+        contact_views.NetworkMapMembershipViewSet.as_view({'get': 'list', 'post': 'create'}),
+        name='network-map-memberships-list',
+    ),
+    path(
+        'network-maps/<int:map_pk>/memberships/<int:pk>/',
+        contact_views.NetworkMapMembershipViewSet.as_view({
+            'get': 'retrieve',
+            'patch': 'partial_update',
+            'put': 'update',
+            'delete': 'destroy',
+        }),
+        name='network-map-memberships-detail',
+    ),
+    path('', include('core.urls')),
+    path('', include('graph.urls')),
+    path('', include('import_export.urls')),
+    path('', include('plugins.urls')),
+]

backend/config/settings.py

@@ -12,13 +12,25 @@ ALLOWED_HOSTS = [
     h.strip() for h in os.environ.get('ALLOWED_HOSTS', '*').split(',') if h.strip()
 ]
 
+ENABLED_PLUGINS = [
+    p.strip()
+    for p in os.environ.get('ENABLED_PLUGINS', 'tags').split(',')
+    if p.strip()
+]
+
 INSTALLED_APPS = [
     'django.contrib.contenttypes',
     'django.contrib.auth',
     'django.contrib.staticfiles',
     'rest_framework',
     'corsheaders',
+    'drf_spectacular',
+    'core',
     'contacts',
+    'graph',
+    'import_export',
+    'plugins',
+    'plugins_tags',
 ]
 
 MIDDLEWARE = [
@@ -41,11 +53,30 @@ STATIC_ROOT = BASE_DIR / 'staticfiles'
 REST_FRAMEWORK = {
     'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
     'PAGE_SIZE': 100,
+    'DEFAULT_SCHEMA_CLASS': 'drf_spectacular.openapi.AutoSchema',
+}
+
+SPECTACULAR_SETTINGS = {
+    'TITLE': 'Social Graph API',
+    'DESCRIPTION': 'API for Social Graph Builder (local-first with optional remote backend)',
+    'VERSION': '1.0.0',
 }
 
 CORS_ALLOW_ALL_ORIGINS = True
 
-# Лимит тела запроса для импорта больших JSON (например, экспорт Monica с сотнями контактов)
+DATA_UPLOAD_MAX_MEMORY_SIZE = 20 * 1024 * 1024
-DATA_UPLOAD_MAX_MEMORY_SIZE = 20 * 1024 * 1024  # 20 MB
 
 DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
+
+# Phase C: optional JWT auth (disabled by default)
+USE_JWT_AUTH = os.environ.get('USE_JWT_AUTH', 'false').lower() in ('1', 'true', 'yes')
+
+if USE_JWT_AUTH:
+    REST_FRAMEWORK['DEFAULT_AUTHENTICATION_CLASSES'] = [
+        'rest_framework_simplejwt.authentication.JWTAuthentication',
+    ]
+    REST_FRAMEWORK['DEFAULT_PERMISSION_CLASSES'] = [
+        'rest_framework.permissions.IsAuthenticated',
+    ]
+
+DEFAULT_WORKSPACE_ID = os.environ.get('DEFAULT_WORKSPACE_ID', 'personal')

backend/config/urls.py

@@ -1,5 +1,10 @@
 from django.urls import path, include
+from drf_spectacular.views import SpectacularAPIView, SpectacularSwaggerView
 
 urlpatterns = [
+    path('api/v1/', include('api.v1.urls')),
     path('api/', include('contacts.urls')),
+    path('api/v1/schema/', SpectacularAPIView.as_view(), name='schema'),
+    path('api/v1/docs/', SpectacularSwaggerView.as_view(url_name='schema'), name='swagger-ui'),
+    path('api/v1/', include('core.auth_urls')),
 ]

backend/conftest.py

@@ -0,0 +1,26 @@
+import pytest
+from contacts.models import Contact, Relation
+
+
+@pytest.fixture
+def api_client():
+    from rest_framework.test import APIClient
+    return APIClient()
+
+
+@pytest.fixture
+def sample_contact(db):
+    return Contact.objects.create(name='Иван Иванов', email='ivan@test.com')
+
+
+@pytest.fixture
+def two_contacts(db):
+    a = Contact.objects.create(name='Алиса')
+    b = Contact.objects.create(name='Боб')
+    return a, b
+
+
+@pytest.fixture
+def sample_relation(db, two_contacts):
+    a, b = two_contacts
+    return Relation.objects.create(source=a, target=b, relation_type='friend')

backend/contacts/models.py

@@ -1,27 +1,12 @@
 from django.core.validators import MaxValueValidator, MinValueValidator
 from django.db import models
 
-
+from core.choices import (
-LIFE_SPHERES = [
+    LIFE_SPHERES,
-    ('work', 'Работа'),
+    NETWORK_CIRCLES,
-    ('study', 'Учёба'),
+    INTERACTION_INTENSITY,
-    ('hobby', 'Хобби'),
+    RELATION_TYPES,
-    ('family', 'Семья'),
+)
-    ('health', 'Здоровье'),
-    ('other', 'Другое'),
-]
-
-NETWORK_CIRCLES = [
-    ('support', 'Круг поддержки'),
-    ('productivity', 'Круг продуктивности'),
-    ('development', 'Круг развития'),
-]
-
-INTERACTION_INTENSITY = [
-    ('intense', 'Интенсивные контакты'),
-    ('periodic', 'Периодические контакты'),
-    ('sparse', 'Редкие контакты'),
-]
 
 
 class Contact(models.Model):
@@ -113,16 +98,6 @@ class NetworkMapMembership(models.Model):
         return f'{self.contact} на {self.map}'
 
 
-RELATION_TYPES = [
-    ('colleague', 'Коллега'),
-    ('friend', 'Друг'),
-    ('family', 'Родственник'),
-    ('acquaintance', 'Знакомый'),
-    ('business', 'Деловой партнёр'),
-    ('other', 'Другое'),
-]
-
-
 class Relation(models.Model):
     """Связь между двумя контактами."""
 

backend/contacts/urls.py

@@ -1,32 +1,6 @@
+"""Legacy /api/ routes — mirrors v1 for backward compatibility."""
 from django.urls import path, include
-from rest_framework.routers import DefaultRouter
-from . import views
-
-router = DefaultRouter()
-router.register('contacts', views.ContactViewSet)
-router.register('relations', views.RelationViewSet)
-router.register('network-maps', views.NetworkMapViewSet)
 
 urlpatterns = [
-    path('', include(router.urls)),
+    path('', include('api.v1.urls')),
-    path(
-        'network-maps/<int:map_pk>/memberships/',
-        views.NetworkMapMembershipViewSet.as_view({'get': 'list', 'post': 'create'}),
-        name='network-map-memberships-list',
-    ),
-    path(
-        'network-maps/<int:map_pk>/memberships/<int:pk>/',
-        views.NetworkMapMembershipViewSet.as_view({
-            'get': 'retrieve',
-            'patch': 'partial_update',
-            'put': 'update',
-            'delete': 'destroy',
-        }),
-        name='network-map-memberships-detail',
-    ),
-    path('graph/', views.graph_data),
-    path('network-map-graph/', views.network_map_graph),
-    path('relation-types/', views.relation_types),
-    path('network-map-choices/', views.network_map_choices),
-    path('import/', views.import_contacts),
 ]

backend/contacts/views.py

@@ -1,21 +1,6 @@
-import csv
+from rest_framework import viewsets
-import io
-import json
 
-from rest_framework import viewsets, status
+from .models import Contact, Relation, NetworkMap, NetworkMapMembership
-from rest_framework.decorators import api_view
-from rest_framework.response import Response
-
-from .models import (
-    Contact,
-    Relation,
-    NetworkMap,
-    NetworkMapMembership,
-    RELATION_TYPES,
-    LIFE_SPHERES,
-    NETWORK_CIRCLES,
-    INTERACTION_INTENSITY,
-)
 from .serializers import (
     ContactSerializer,
     RelationSerializer,
@@ -58,361 +43,3 @@ class NetworkMapMembershipViewSet(viewsets.ModelViewSet):
     def perform_create(self, serializer):
         map_id = self.kwargs.get('map_pk')
         serializer.save(map_id=map_id)
-
-
-def _node_from_membership(membership):
-    contact = membership.contact
-    return {
-        'id': contact.id,
-        'label': contact.name,
-        'title': '\n'.join(filter(None, [contact.organization, contact.position, contact.email])),
-        'group': contact.organization or 'default',
-        'life_sphere': membership.life_sphere,
-        'network_circle': membership.network_circle,
-        'importance': membership.importance,
-        'map_angle': membership.map_angle,
-        'map_radius_ratio': membership.map_radius_ratio,
-        'membership_id': membership.id,
-    }
-
-
-def _edge_from_relation(r):
-    return {
-        'id': r.id,
-        'from': r.source_id,
-        'to': r.target_id,
-        'label': r.get_relation_type_display(),
-        'title': r.description or r.get_relation_type_display(),
-        'relation_type': r.relation_type,
-        'interaction_intensity': r.interaction_intensity,
-    }
-
-
-@api_view(['GET'])
-def graph_data(request):
-    """Возвращает граф: nodes + edges для vis.js."""
-    contacts = Contact.objects.all()
-    nodes = [
-        {
-            'id': c.id,
-            'label': c.name,
-            'title': '\n'.join(filter(None, [c.organization, c.position, c.email])),
-            'group': c.organization or 'default',
-        }
-        for c in contacts
-    ]
-    relations = Relation.objects.select_related('source', 'target').all()
-    edges = [_edge_from_relation(r) for r in relations]
-    return Response({'nodes': nodes, 'edges': edges})
-
-
-@api_view(['GET'])
-def network_map_graph(request):
-    """Граф для конкретной карты сети: участники и связи между ними."""
-    map_id = request.query_params.get('map_id')
-    if not map_id:
-        default_map = NetworkMap.objects.order_by('id').first()
-        if not default_map:
-            return Response({'nodes': [], 'edges': []})
-        map_id = default_map.id
-
-    memberships = list(
-        NetworkMapMembership.objects.filter(map_id=map_id)
-        .select_related('contact')
-        .order_by('contact__name')
-    )
-    allowed_ids = {m.contact_id for m in memberships}
-    nodes = [_node_from_membership(m) for m in memberships]
-    relations = Relation.objects.select_related('source', 'target').all()
-    edges = [
-        _edge_from_relation(r)
-        for r in relations
-        if r.source_id in allowed_ids and r.target_id in allowed_ids
-    ]
-    return Response({'nodes': nodes, 'edges': edges})
-
-
-@api_view(['GET'])
-def relation_types(request):
-    """Список допустимых типов связей."""
-    return Response([{'value': v, 'label': l} for v, l in RELATION_TYPES])
-
-
-@api_view(['GET'])
-def network_map_choices(request):
-    """Подписи для карты сети: сферы, круги, интенсивность связей."""
-    return Response({
-        'life_spheres': [{'value': v, 'label': l} for v, l in LIFE_SPHERES],
-        'network_circles': [{'value': v, 'label': l} for v, l in NETWORK_CIRCLES],
-        'interaction_intensities': [{'value': v, 'label': l} for v, l in INTERACTION_INTENSITY],
-    })
-
-
-def _monica_contact_fields(contact_data):
-    """Из вложенного data контакта Monica (экспорт account.data) извлекает телефон, email, заметки."""
-    phone = ''
-    email = ''
-    notes_parts = []
-    for block in contact_data or []:
-        if block.get('type') == 'contact_field':
-            for val in block.get('values') or []:
-                props = val.get('properties') or {}
-                value = str(props.get('data') or '').strip()
-                if not value:
-                    continue
-                if '@' in value and '.' in value:
-                    email = email or value
-                else:
-                    phone = phone or value
-        elif block.get('type') == 'note':
-            for val in block.get('values') or []:
-                body = str((val.get('properties') or {}).get('body') or '').strip()
-                if body:
-                    notes_parts.append(body)
-    return phone, email, '\n'.join(notes_parts)
-
-
-def _normalize_rows(data):
-    """
-    Нормализует различные форматы JSON в плоский список словарей.
-
-    Поддерживает:
-    - Плоский массив:        [{"name": ...}, ...]
-    - Monica CRM (экспорт):  {"account": {"data": [{"type": "contact", "values": [...]}]}}
-    - Monica CRM (старый):  {"contacts": [{"first_name": ..., "last_name": ...}, ...]}
-    - Обёртка results:      {"results": [...]}
-    - Обёртка data:         {"data": [...]}
-    """
-    if isinstance(data, list):
-        return data
-    if isinstance(data, dict):
-        # Monica CRM полный экспорт: account.data, блоки type=contact, values[].properties + data
-        account = data.get('account')
-        if isinstance(account, dict):
-            account_data = account.get('data')
-            if isinstance(account_data, list):
-                rows = []
-                for block in account_data:
-                    if block.get('type') != 'contact':
-                        continue
-                    for c in block.get('values') or []:
-                        props = c.get('properties') or {}
-                        first = str(props.get('first_name') or '').strip()
-                        last = str(props.get('last_name') or '').strip()
-                        middle = str(props.get('middle_name') or '').strip()
-                        name = ' '.join(filter(None, [first, middle, last])) or ' '.join(
-                            filter(None, [first, last])
-                        )
-                        if not name:
-                            continue
-                        phone, email, notes = _monica_contact_fields(c.get('data'))
-                        rows.append({
-                            'name': name,
-                            'email': email,
-                            'phone': phone,
-                            'organization': '',
-                            'position': '',
-                            'notes': notes,
-                        })
-                if rows:
-                    return rows
-        # Monica CRM: ключ "contacts" с first_name/last_name (старый формат API)
-        if 'contacts' in data:
-            rows = []
-            for c in data['contacts']:
-                first = str(c.get('first_name') or '').strip()
-                last = str(c.get('last_name') or '').strip()
-                name = ' '.join(filter(None, [first, last]))
-                # Телефоны Monica хранятся в списке phone_numbers
-                phone = ''
-                for ph in c.get('phone_numbers') or []:
-                    phone = str(ph.get('number') or ph.get('content') or '')
-                    if phone:
-                        break
-                # Email Monica — список emails
-                email = ''
-                for em in c.get('emails') or []:
-                    email = str(em.get('email') or em.get('content') or '')
-                    if email:
-                        break
-                # Организации Monica — список companies
-                org = ''
-                position = ''
-                for comp in c.get('companies') or []:
-                    org = str(comp.get('name') or comp.get('company_name') or '')
-                    position = str(comp.get('job') or comp.get('position') or comp.get('title') or '')
-                    if org:
-                        break
-                # Также бывает прямое поле company
-                if not org:
-                    org = str(c.get('company') or c.get('company_name') or '').strip()
-                    position = str(c.get('job') or c.get('position') or '').strip()
-                rows.append({
-                    'name': name,
-                    'email': email,
-                    'phone': phone,
-                    'organization': org,
-                    'position': position,
-                    'notes': str(c.get('information') or c.get('description') or c.get('notes') or '').strip(),
-                })
-            return rows
-        # Другие обёртки
-        for key in ('results', 'data', 'items', 'people', 'persons'):
-            if key in data and isinstance(data[key], list):
-                return data[key]
-    return []
-
-
-def _unfold_vcard_lines(text):
-    lines = text.replace('\r\n', '\n').replace('\r', '\n').split('\n')
-    unfolded = []
-    for line in lines:
-        if line.startswith((' ', '\t')) and unfolded:
-            unfolded[-1] += line[1:]
-        else:
-            unfolded.append(line)
-    return unfolded
-
-
-def _unescape_vcard_value(value):
-    return (
-        str(value or '')
-        .replace('\\n', '\n')
-        .replace('\\N', '\n')
-        .replace('\\,', ',')
-        .replace('\\;', ';')
-        .replace('\\\\', '\\')
-        .strip()
-    )
-
-
-def _name_from_vcard_n(value):
-    parts = _unescape_vcard_value(value).split(';')
-    family = (parts[0] if len(parts) > 0 else '').strip()
-    given = (parts[1] if len(parts) > 1 else '').strip()
-    additional = (parts[2] if len(parts) > 2 else '').strip()
-    return ' '.join(filter(None, [given, additional, family])).strip()
-
-
-def _parse_vcf_rows(text):
-    props = None
-    rows = []
-    for line in _unfold_vcard_lines(text):
-        trimmed = line.strip()
-        if not trimmed:
-            continue
-        upper = trimmed.upper()
-        if upper == 'BEGIN:VCARD':
-            props = {}
-            continue
-        if upper == 'END:VCARD':
-            if props:
-                name = (
-                    (props.get('FN') or [''])[0]
-                    or _name_from_vcard_n((props.get('N') or [''])[0])
-                ).strip()
-                org_raw = (props.get('ORG') or [''])[0]
-                org = org_raw.split(';')[0].strip() if org_raw else ''
-                email = (props.get('EMAIL') or [''])[0].replace('mailto:', '').strip()
-                phone = (props.get('TEL') or [''])[0].replace('tel:', '').strip()
-                rows.append({
-                    'name': name,
-                    'email': email,
-                    'phone': phone,
-                    'organization': org,
-                    'position': (props.get('TITLE') or [''])[0].strip(),
-                    'notes': '\n'.join(props.get('NOTE') or []).strip(),
-                })
-            props = None
-            continue
-        if props is None:
-            continue
-        if ':' not in trimmed:
-            continue
-        raw_key, value = trimmed.split(':', 1)
-        key = raw_key.split(';')[0].upper()
-        decoded = _unescape_vcard_value(value.replace('mailto:', '').replace('tel:', ''))
-        props.setdefault(key, []).append(decoded)
-    return rows
-
-
-@api_view(['POST'])
-def import_contacts(request):
-    """
-    Импорт контактов из CSV, JSON или vCard (.vcf).
-
-    CSV: name,email,phone,organization,position,notes
-    JSON (плоский): [{"name": "...", ...}, ...]
-    JSON (Monica CRM): {"contacts": [{"first_name": ..., "last_name": ...}, ...]}
-    vCard: экспорт из телефона / Google Contacts (.vcf)
-    """
-    file = request.FILES.get('file')
-    if not file:
-        return Response({'error': 'Файл не передан.'}, status=status.HTTP_400_BAD_REQUEST)
-
-    filename = file.name.lower()
-    created = 0
-    skipped = 0
-    errors = []
-
-    try:
-        if filename.endswith('.csv'):
-            text = file.read().decode('utf-8-sig')
-            reader = csv.DictReader(io.StringIO(text))
-            rows = list(reader)
-        elif filename.endswith('.json'):
-            raw = json.loads(file.read().decode('utf-8'))
-            rows = _normalize_rows(raw)
-            if not rows:
-                return Response(
-                    {'error': 'Не удалось распознать формат JSON. Ожидается массив контактов или экспорт Monica CRM.'},
-                    status=status.HTTP_400_BAD_REQUEST,
-                )
-        elif filename.endswith('.vcf') or filename.endswith('.vcard'):
-            text = file.read().decode('utf-8-sig')
-            rows = _parse_vcf_rows(text)
-            if not rows:
-                return Response(
-                    {'error': 'В файле vCard не найдено контактов.'},
-                    status=status.HTTP_400_BAD_REQUEST,
-                )
-        else:
-            return Response(
-                {'error': 'Поддерживаются только CSV, JSON и vCard (.vcf) файлы.'},
-                status=status.HTTP_400_BAD_REQUEST,
-            )
-    except Exception as e:
-        return Response({'error': f'Ошибка разбора файла: {e}'}, status=status.HTTP_400_BAD_REQUEST)
-
-    total_rows = len(rows)
-    for i, row in enumerate(rows):
-        name = str(
-            row.get('name') or row.get('Name') or row.get('ФИО') or
-            ' '.join(filter(None, [
-                str(row.get('first_name') or '').strip(),
-                str(row.get('last_name') or '').strip(),
-            ]))
-        ).strip()
-        if not name:
-            errors.append(f'Строка {i + 1}: отсутствует поле "name"')
-            skipped += 1
-            continue
-
-        Contact.objects.get_or_create(
-            name=name,
-            defaults={
-                'email': str(row.get('email') or '').strip(),
-                'phone': str(row.get('phone') or '').strip(),
-                'organization': str(row.get('organization') or '').strip(),
-                'position': str(row.get('position') or '').strip(),
-                'notes': str(row.get('notes') or '').strip(),
-            },
-        )
-        created += 1
-
-    return Response({
-        'total': total_rows,
-        'created': created,
-        'skipped': skipped,
-        'errors': errors,
-    })

backend/core/__init__.py

@@ -0,0 +1 @@
+

backend/core/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class CoreConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'core'

backend/core/auth_urls.py

@@ -0,0 +1,15 @@
+from django.urls import path
+
+urlpatterns = []
+
+try:
+    from django.conf import settings
+    if getattr(settings, 'USE_JWT_AUTH', False):
+        from rest_framework_simplejwt.views import TokenObtainPairView, TokenRefreshView
+
+        urlpatterns = [
+            path('auth/token/', TokenObtainPairView.as_view(), name='token_obtain_pair'),
+            path('auth/token/refresh/', TokenRefreshView.as_view(), name='token_refresh'),
+        ]
+except ImportError:
+    pass

backend/core/choices.py

@@ -0,0 +1,40 @@
+"""Shared domain choice constants for API meta and models."""
+
+LIFE_SPHERES = [
+    ('work', 'Работа'),
+    ('study', 'Учёба'),
+    ('hobby', 'Хобби'),
+    ('family', 'Семья'),
+    ('health', 'Здоровье'),
+    ('other', 'Другое'),
+]
+
+NETWORK_CIRCLES = [
+    ('support', 'Круг поддержки'),
+    ('productivity', 'Круг продуктивности'),
+    ('development', 'Круг развития'),
+]
+
+INTERACTION_INTENSITY = [
+    ('intense', 'Интенсивные контакты'),
+    ('periodic', 'Периодические контакты'),
+    ('sparse', 'Редкие контакты'),
+]
+
+RELATION_TYPES = [
+    ('colleague', 'Коллега'),
+    ('friend', 'Друг'),
+    ('family', 'Родственник'),
+    ('acquaintance', 'Знакомый'),
+    ('business', 'Деловой партнёр'),
+    ('other', 'Другое'),
+]
+
+
+def choices_payload():
+    return {
+        'relation_types': [{'value': v, 'label': l} for v, l in RELATION_TYPES],
+        'life_spheres': [{'value': v, 'label': l} for v, l in LIFE_SPHERES],
+        'network_circles': [{'value': v, 'label': l} for v, l in NETWORK_CIRCLES],
+        'interaction_intensities': [{'value': v, 'label': l} for v, l in INTERACTION_INTENSITY],
+    }

backend/core/urls.py

@@ -0,0 +1,9 @@
+from django.urls import path
+
+from . import views
+
+urlpatterns = [
+    path('meta/choices/', views.meta_choices, name='meta-choices'),
+    path('relation-types/', views.relation_types, name='relation-types'),
+    path('network-map-choices/', views.network_map_choices, name='network-map-choices'),
+]

backend/core/views.py

@@ -0,0 +1,30 @@
+from rest_framework.decorators import api_view
+from rest_framework.response import Response
+
+from .choices import (
+    RELATION_TYPES,
+    LIFE_SPHERES,
+    NETWORK_CIRCLES,
+    INTERACTION_INTENSITY,
+    choices_payload,
+)
+
+
+@api_view(['GET'])
+def meta_choices(request):
+    """Unified meta endpoint for all domain enums."""
+    return Response(choices_payload())
+
+
+@api_view(['GET'])
+def relation_types(request):
+    return Response([{'value': v, 'label': l} for v, l in RELATION_TYPES])
+
+
+@api_view(['GET'])
+def network_map_choices(request):
+    return Response({
+        'life_spheres': [{'value': v, 'label': l} for v, l in LIFE_SPHERES],
+        'network_circles': [{'value': v, 'label': l} for v, l in NETWORK_CIRCLES],
+        'interaction_intensities': [{'value': v, 'label': l} for v, l in INTERACTION_INTENSITY],
+    })

backend/graph/__init__.py

@@ -0,0 +1 @@
+

backend/graph/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class GraphConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'graph'

backend/graph/services.py

@@ -0,0 +1,66 @@
+from contacts.models import Contact, Relation, NetworkMap, NetworkMapMembership
+
+
+def node_from_contact(contact):
+    return {
+        'id': contact.id,
+        'label': contact.name,
+        'title': '\n'.join(filter(None, [contact.organization, contact.position, contact.email])),
+        'group': contact.organization or 'default',
+    }
+
+
+def node_from_membership(membership):
+    contact = membership.contact
+    return {
+        **node_from_contact(contact),
+        'life_sphere': membership.life_sphere,
+        'network_circle': membership.network_circle,
+        'importance': membership.importance,
+        'map_angle': membership.map_angle,
+        'map_radius_ratio': membership.map_radius_ratio,
+        'membership_id': membership.id,
+    }
+
+
+def edge_from_relation(relation):
+    return {
+        'id': relation.id,
+        'from': relation.source_id,
+        'to': relation.target_id,
+        'label': relation.get_relation_type_display(),
+        'title': relation.description or relation.get_relation_type_display(),
+        'relation_type': relation.relation_type,
+        'interaction_intensity': relation.interaction_intensity,
+    }
+
+
+def build_full_graph():
+    contacts = Contact.objects.all()
+    nodes = [node_from_contact(c) for c in contacts]
+    relations = Relation.objects.select_related('source', 'target').all()
+    edges = [edge_from_relation(r) for r in relations]
+    return {'nodes': nodes, 'edges': edges}
+
+
+def build_network_map_graph(map_id=None):
+    if not map_id:
+        default_map = NetworkMap.objects.order_by('id').first()
+        if not default_map:
+            return {'nodes': [], 'edges': []}
+        map_id = default_map.id
+
+    memberships = list(
+        NetworkMapMembership.objects.filter(map_id=map_id)
+        .select_related('contact')
+        .order_by('contact__name')
+    )
+    allowed_ids = {m.contact_id for m in memberships}
+    nodes = [node_from_membership(m) for m in memberships]
+    relations = Relation.objects.select_related('source', 'target').all()
+    edges = [
+        edge_from_relation(r)
+        for r in relations
+        if r.source_id in allowed_ids and r.target_id in allowed_ids
+    ]
+    return {'nodes': nodes, 'edges': edges}

backend/graph/urls.py

@@ -0,0 +1,8 @@
+from django.urls import path
+
+from . import views
+
+urlpatterns = [
+    path('graph/', views.graph_data, name='graph-data'),
+    path('network-map-graph/', views.network_map_graph, name='network-map-graph'),
+]

backend/graph/views.py

@@ -0,0 +1,15 @@
+from rest_framework.decorators import api_view
+from rest_framework.response import Response
+
+from .services import build_full_graph, build_network_map_graph
+
+
+@api_view(['GET'])
+def graph_data(request):
+    return Response(build_full_graph())
+
+
+@api_view(['GET'])
+def network_map_graph(request):
+    map_id = request.query_params.get('map_id')
+    return Response(build_network_map_graph(map_id))

backend/import_export/__init__.py

@@ -0,0 +1 @@
+

backend/import_export/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class ImportExportConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'import_export'

backend/import_export/services.py

@@ -0,0 +1,231 @@
+import csv
+import io
+import json
+
+from contacts.models import Contact
+
+
+def monica_contact_fields(contact_data):
+    phone = ''
+    email = ''
+    notes_parts = []
+    for block in contact_data or []:
+        if block.get('type') == 'contact_field':
+            for val in block.get('values') or []:
+                props = val.get('properties') or {}
+                value = str(props.get('data') or '').strip()
+                if not value:
+                    continue
+                if '@' in value and '.' in value:
+                    email = email or value
+                else:
+                    phone = phone or value
+        elif block.get('type') == 'note':
+            for val in block.get('values') or []:
+                body = str((val.get('properties') or {}).get('body') or '').strip()
+                if body:
+                    notes_parts.append(body)
+    return phone, email, '\n'.join(notes_parts)
+
+
+def normalize_rows(data):
+    if isinstance(data, list):
+        return data
+    if isinstance(data, dict):
+        account = data.get('account')
+        if isinstance(account, dict):
+            account_data = account.get('data')
+            if isinstance(account_data, list):
+                rows = []
+                for block in account_data:
+                    if block.get('type') != 'contact':
+                        continue
+                    for c in block.get('values') or []:
+                        props = c.get('properties') or {}
+                        first = str(props.get('first_name') or '').strip()
+                        last = str(props.get('last_name') or '').strip()
+                        middle = str(props.get('middle_name') or '').strip()
+                        name = ' '.join(filter(None, [first, middle, last])) or ' '.join(
+                            filter(None, [first, last])
+                        )
+                        if not name:
+                            continue
+                        phone, email, notes = monica_contact_fields(c.get('data'))
+                        rows.append({
+                            'name': name,
+                            'email': email,
+                            'phone': phone,
+                            'organization': '',
+                            'position': '',
+                            'notes': notes,
+                        })
+                if rows:
+                    return rows
+        if 'contacts' in data:
+            rows = []
+            for c in data['contacts']:
+                first = str(c.get('first_name') or '').strip()
+                last = str(c.get('last_name') or '').strip()
+                name = ' '.join(filter(None, [first, last]))
+                phone = ''
+                for ph in c.get('phone_numbers') or []:
+                    phone = str(ph.get('number') or ph.get('content') or '')
+                    if phone:
+                        break
+                email = ''
+                for em in c.get('emails') or []:
+                    email = str(em.get('email') or em.get('content') or '')
+                    if email:
+                        break
+                org = ''
+                position = ''
+                for comp in c.get('companies') or []:
+                    org = str(comp.get('name') or comp.get('company_name') or '')
+                    position = str(comp.get('job') or comp.get('position') or comp.get('title') or '')
+                    if org:
+                        break
+                if not org:
+                    org = str(c.get('company') or c.get('company_name') or '').strip()
+                    position = str(c.get('job') or c.get('position') or '').strip()
+                rows.append({
+                    'name': name,
+                    'email': email,
+                    'phone': phone,
+                    'organization': org,
+                    'position': position,
+                    'notes': str(c.get('information') or c.get('description') or c.get('notes') or '').strip(),
+                })
+            return rows
+        for key in ('results', 'data', 'items', 'people', 'persons'):
+            if key in data and isinstance(data[key], list):
+                return data[key]
+    return []
+
+
+def unfold_vcard_lines(text):
+    lines = text.replace('\r\n', '\n').replace('\r', '\n').split('\n')
+    unfolded = []
+    for line in lines:
+        if line.startswith((' ', '\t')) and unfolded:
+            unfolded[-1] += line[1:]
+        else:
+            unfolded.append(line)
+    return unfolded
+
+
+def unescape_vcard_value(value):
+    return (
+        str(value or '')
+        .replace('\\n', '\n')
+        .replace('\\N', '\n')
+        .replace('\\,', ',')
+        .replace('\\;', ';')
+        .replace('\\\\', '\\')
+        .strip()
+    )
+
+
+def name_from_vcard_n(value):
+    parts = unescape_vcard_value(value).split(';')
+    family = (parts[0] if len(parts) > 0 else '').strip()
+    given = (parts[1] if len(parts) > 1 else '').strip()
+    additional = (parts[2] if len(parts) > 2 else '').strip()
+    return ' '.join(filter(None, [given, additional, family])).strip()
+
+
+def parse_vcf_rows(text):
+    props = None
+    rows = []
+    for line in unfold_vcard_lines(text):
+        trimmed = line.strip()
+        if not trimmed:
+            continue
+        upper = trimmed.upper()
+        if upper == 'BEGIN:VCARD':
+            props = {}
+            continue
+        if upper == 'END:VCARD':
+            if props:
+                name = (
+                    (props.get('FN') or [''])[0]
+                    or name_from_vcard_n((props.get('N') or [''])[0])
+                ).strip()
+                org_raw = (props.get('ORG') or [''])[0]
+                org = org_raw.split(';')[0].strip() if org_raw else ''
+                email = (props.get('EMAIL') or [''])[0].replace('mailto:', '').strip()
+                phone = (props.get('TEL') or [''])[0].replace('tel:', '').strip()
+                rows.append({
+                    'name': name,
+                    'email': email,
+                    'phone': phone,
+                    'organization': org,
+                    'position': (props.get('TITLE') or [''])[0].strip(),
+                    'notes': '\n'.join(props.get('NOTE') or []).strip(),
+                })
+            props = None
+            continue
+        if props is None:
+            continue
+        if ':' not in trimmed:
+            continue
+        raw_key, value = trimmed.split(':', 1)
+        key = raw_key.split(';')[0].upper()
+        decoded = unescape_vcard_value(value.replace('mailto:', '').replace('tel:', ''))
+        props.setdefault(key, []).append(decoded)
+    return rows
+
+
+def parse_upload_file(file):
+    filename = file.name.lower()
+    if filename.endswith('.csv'):
+        text = file.read().decode('utf-8-sig')
+        reader = csv.DictReader(io.StringIO(text))
+        return list(reader), None
+    if filename.endswith('.json'):
+        raw = json.loads(file.read().decode('utf-8'))
+        rows = normalize_rows(raw)
+        if not rows:
+            return None, 'Не удалось распознать формат JSON. Ожидается массив контактов или экспорт Monica CRM.'
+        return rows, None
+    if filename.endswith('.vcf') or filename.endswith('.vcard'):
+        text = file.read().decode('utf-8-sig')
+        rows = parse_vcf_rows(text)
+        if not rows:
+            return None, 'В файле vCard не найдено контактов.'
+        return rows, None
+    return None, 'Поддерживаются только CSV, JSON и vCard (.vcf) файлы.'
+
+
+def import_contacts_from_rows(rows):
+    created = 0
+    skipped = 0
+    errors = []
+    for i, row in enumerate(rows):
+        name = str(
+            row.get('name') or row.get('Name') or row.get('ФИО') or
+            ' '.join(filter(None, [
+                str(row.get('first_name') or '').strip(),
+                str(row.get('last_name') or '').strip(),
+            ]))
+        ).strip()
+        if not name:
+            errors.append(f'Строка {i + 1}: отсутствует поле "name"')
+            skipped += 1
+            continue
+        Contact.objects.get_or_create(
+            name=name,
+            defaults={
+                'email': str(row.get('email') or '').strip(),
+                'phone': str(row.get('phone') or '').strip(),
+                'organization': str(row.get('organization') or '').strip(),
+                'position': str(row.get('position') or '').strip(),
+                'notes': str(row.get('notes') or '').strip(),
+            },
+        )
+        created += 1
+    return {
+        'total': len(rows),
+        'created': created,
+        'skipped': skipped,
+        'errors': errors,
+    }

backend/import_export/urls.py

@@ -0,0 +1,7 @@
+from django.urls import path
+
+from . import views
+
+urlpatterns = [
+    path('import/', views.import_contacts, name='import-contacts'),
+]

backend/import_export/views.py

@@ -0,0 +1,19 @@
+from rest_framework import status
+from rest_framework.decorators import api_view
+from rest_framework.response import Response
+
+from .services import parse_upload_file, import_contacts_from_rows
+
+
+@api_view(['POST'])
+def import_contacts(request):
+    file = request.FILES.get('file')
+    if not file:
+        return Response({'error': 'Файл не передан.'}, status=status.HTTP_400_BAD_REQUEST)
+    try:
+        rows, error = parse_upload_file(file)
+        if error:
+            return Response({'error': error}, status=status.HTTP_400_BAD_REQUEST)
+        return Response(import_contacts_from_rows(rows))
+    except Exception as e:
+        return Response({'error': f'Ошибка разбора файла: {e}'}, status=status.HTTP_400_BAD_REQUEST)

backend/plugins/__init__.py

@@ -0,0 +1 @@
+

backend/plugins/apps.py

@@ -0,0 +1,9 @@
+from django.apps import AppConfig
+
+
+class PluginsConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'plugins'
+
+    def ready(self):
+        import plugins.registry  # noqa: F401

backend/plugins/base.py

@@ -0,0 +1,48 @@
+"""Plugin platform base classes and registry."""
+
+from abc import ABC, abstractmethod
+from typing import List
+
+from django.conf import settings
+from django.urls import URLPattern
+
+
+class Plugin(ABC):
+    id: str = ''
+    version: str = '1.0.0'
+    min_core_version: str = '1.0.0'
+    permissions: List[str] = []
+
+    @abstractmethod
+    def urlpatterns(self) -> List[URLPattern]:
+        pass
+
+    def installed_apps(self) -> List[str]:
+        return []
+
+
+_REGISTRY: dict[str, Plugin] = {}
+
+
+def register_plugin(plugin: Plugin) -> None:
+    _REGISTRY[plugin.id] = plugin
+
+
+def get_plugin(plugin_id: str) -> Plugin | None:
+    return _REGISTRY.get(plugin_id)
+
+
+def get_enabled_plugins() -> List[Plugin]:
+    enabled = getattr(settings, 'ENABLED_PLUGINS', [])
+    return [_REGISTRY[pid] for pid in enabled if pid in _REGISTRY]
+
+
+def plugin_urlpatterns() -> List[URLPattern]:
+    from django.urls import path, include
+
+    patterns: List[URLPattern] = []
+    for plugin in get_enabled_plugins():
+        patterns.append(
+            path(f'plugins/{plugin.id}/', include((plugin.urlpatterns(), plugin.id)))
+        )
+    return patterns

backend/plugins/registry.py

@@ -0,0 +1,6 @@
+"""Register built-in plugins."""
+
+from plugins.base import register_plugin
+from plugins_tags.plugin import TagsPlugin
+
+register_plugin(TagsPlugin())

backend/plugins/urls.py

@@ -0,0 +1,9 @@
+from django.urls import path
+
+from . import views
+from .base import plugin_urlpatterns
+
+urlpatterns = [
+    path('plugins/', views.plugin_manifest, name='plugin-manifest'),
+    *plugin_urlpatterns(),
+]

backend/plugins/views.py

@@ -0,0 +1,19 @@
+from django.urls import path
+from rest_framework.decorators import api_view
+from rest_framework.response import Response
+
+from plugins.base import get_enabled_plugins
+
+
+@api_view(['GET'])
+def plugin_manifest(request):
+    """List enabled plugins and their metadata."""
+    return Response([
+        {
+            'id': p.id,
+            'version': p.version,
+            'min_core_version': p.min_core_version,
+            'permissions': p.permissions,
+        }
+        for p in get_enabled_plugins()
+    ])

backend/plugins_tags/__init__.py

@@ -0,0 +1 @@
+

backend/plugins_tags/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class PluginsTagsConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'plugins_tags'

backend/plugins_tags/migrations/0001_initial.py

@@ -0,0 +1,30 @@
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('contacts', '0006_network_maps'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ContactTag',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('label', models.CharField(max_length=100, verbose_name='Тег')),
+                ('workspace_id', models.CharField(db_index=True, default='personal', max_length=64)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('contact', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='tags', to='contacts.contact', verbose_name='Контакт')),
+            ],
+            options={
+                'verbose_name': 'Тег контакта',
+                'verbose_name_plural': 'Теги контактов',
+                'ordering': ['label'],
+                'unique_together': {('contact', 'label', 'workspace_id')},
+            },
+        ),
+    ]

backend/plugins_tags/migrations/__init__.py

@@ -0,0 +1 @@
+# Generated migration placeholder - run: python manage.py makemigrations plugins_tags

backend/plugins_tags/models.py

@@ -0,0 +1,26 @@
+from django.db import models
+
+from contacts.models import Contact
+
+
+class ContactTag(models.Model):
+    """Tag assigned to a contact (reference plugin)."""
+
+    contact = models.ForeignKey(
+        Contact,
+        on_delete=models.CASCADE,
+        related_name='tags',
+        verbose_name='Контакт',
+    )
+    label = models.CharField(max_length=100, verbose_name='Тег')
+    workspace_id = models.CharField(max_length=64, default='personal', db_index=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        unique_together = ('contact', 'label', 'workspace_id')
+        ordering = ['label']
+        verbose_name = 'Тег контакта'
+        verbose_name_plural = 'Теги контактов'
+
+    def __str__(self):
+        return f'{self.label} → {self.contact}'

backend/plugins_tags/plugin.py

@@ -0,0 +1,15 @@
+from plugins.base import Plugin
+from plugins_tags.urls import urlpatterns
+
+
+class TagsPlugin(Plugin):
+    id = 'tags'
+    version = '1.0.0'
+    min_core_version = '1.0.0'
+    permissions = ['read:contacts', 'write:contacts']
+
+    def urlpatterns(self):
+        return urlpatterns
+
+    def installed_apps(self):
+        return ['plugins_tags']

backend/plugins_tags/serializers.py

@@ -0,0 +1,12 @@
+from rest_framework import serializers
+
+from .models import ContactTag
+
+
+class ContactTagSerializer(serializers.ModelSerializer):
+    contact_name = serializers.CharField(source='contact.name', read_only=True)
+
+    class Meta:
+        model = ContactTag
+        fields = ['id', 'contact', 'contact_name', 'label', 'workspace_id', 'created_at']
+        read_only_fields = ['id', 'created_at', 'contact_name']

backend/plugins_tags/urls.py

@@ -0,0 +1,9 @@
+from django.urls import path, include
+from rest_framework.routers import DefaultRouter
+
+from .views import ContactTagViewSet
+
+router = DefaultRouter()
+router.register('contact-tags', ContactTagViewSet, basename='contact-tag')
+
+urlpatterns = router.urls

backend/plugins_tags/views.py

@@ -0,0 +1,22 @@
+from rest_framework import viewsets
+from django.conf import settings
+
+from .models import ContactTag
+from .serializers import ContactTagSerializer
+
+
+class ContactTagViewSet(viewsets.ModelViewSet):
+    serializer_class = ContactTagSerializer
+
+    def get_queryset(self):
+        qs = ContactTag.objects.select_related('contact').all()
+        workspace = self.request.query_params.get('workspace_id') or settings.DEFAULT_WORKSPACE_ID
+        qs = qs.filter(workspace_id=workspace)
+        contact_id = self.request.query_params.get('contact_id')
+        if contact_id:
+            qs = qs.filter(contact_id=contact_id)
+        return qs
+
+    def perform_create(self, serializer):
+        workspace = self.request.data.get('workspace_id') or settings.DEFAULT_WORKSPACE_ID
+        serializer.save(workspace_id=workspace)

backend/pyproject.toml

@@ -0,0 +1,41 @@
+[build-system]
+requires = ["setuptools>=68"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "social-graph-backend"
+version = "1.0.0"
+description = "Social Graph Builder API"
+readme = "README.md"
+requires-python = ">=3.11"
+dependencies = [
+  "Django==4.2.9",
+  "djangorestframework==3.14.0",
+  "django-cors-headers==4.3.1",
+  "drf-spectacular==0.27.1",
+  "djangorestframework-simplejwt==5.3.1",
+  "Pillow==10.2.0",
+]
+
+[project.optional-dependencies]
+dev = ["pytest==8.0.0", "pytest-django==4.8.0"]
+
+[project.entry-points."social_graph.plugins"]
+tags = "plugins_tags.plugin:TagsPlugin"
+
+[tool.setuptools.packages.find]
+where = ["."]
+include = [
+  "config*",
+  "contacts*",
+  "core*",
+  "graph*",
+  "import_export*",
+  "plugins*",
+  "plugins_tags*",
+  "api*",
+]
+
+[tool.pytest.ini_options]
+DJANGO_SETTINGS_MODULE = "config.settings"
+python_files = ["tests.py", "test_*.py", "*_tests.py"]

backend/pytest.ini

@@ -0,0 +1,3 @@
+[pytest]
+DJANGO_SETTINGS_MODULE = config.settings
+python_files = tests.py test_*.py *_tests.py

backend/requirements.txt

@@ -1,4 +1,8 @@
 Django==4.2.9
 djangorestframework==3.14.0
 django-cors-headers==4.3.1
+drf-spectacular==0.27.1
+djangorestframework-simplejwt==5.3.1
 Pillow==10.2.0
+pytest==8.0.0
+pytest-django==4.8.0

backend/tests/__init__.py

@@ -0,0 +1 @@
+

backend/tests/test_contacts_api.py

@@ -0,0 +1,24 @@
+import pytest
+from django.urls import reverse
+
+
+@pytest.mark.django_db
+def test_contacts_list(api_client, sample_contact):
+    response = api_client.get('/api/v1/contacts/')
+    assert response.status_code == 200
+    assert response.data['count'] == 1
+    assert response.data['results'][0]['name'] == 'Иван Иванов'
+
+
+@pytest.mark.django_db
+def test_contact_create(api_client):
+    response = api_client.post('/api/v1/contacts/', {'name': 'Новый контакт'}, format='json')
+    assert response.status_code == 201
+    assert response.data['name'] == 'Новый контакт'
+
+
+@pytest.mark.django_db
+def test_relations_list(api_client, sample_relation):
+    response = api_client.get('/api/v1/relations/')
+    assert response.status_code == 200
+    assert response.data['count'] == 1

backend/tests/test_graph_api.py

@@ -0,0 +1,22 @@
+import pytest
+
+
+@pytest.mark.django_db
+def test_graph_empty(api_client):
+    response = api_client.get('/api/v1/graph/')
+    assert response.status_code == 200
+    assert response.data == {'nodes': [], 'edges': []}
+
+
+@pytest.mark.django_db
+def test_graph_with_data(api_client, sample_contact, sample_relation):
+    response = api_client.get('/api/v1/graph/')
+    assert response.status_code == 200
+    assert len(response.data['nodes']) == 2
+    assert len(response.data['edges']) == 1
+
+
+@pytest.mark.django_db
+def test_legacy_api_path(api_client):
+    response = api_client.get('/api/graph/')
+    assert response.status_code == 200

backend/tests/test_meta_api.py

@@ -0,0 +1,20 @@
+import pytest
+
+
+@pytest.mark.django_db
+def test_meta_choices(api_client):
+    response = api_client.get('/api/v1/meta/choices/')
+    assert response.status_code == 200
+    data = response.data
+    assert 'relation_types' in data
+    assert 'life_spheres' in data
+    assert 'network_circles' in data
+    assert 'interaction_intensities' in data
+    assert any(x['value'] == 'friend' for x in data['relation_types'])
+
+
+@pytest.mark.django_db
+def test_relation_types_legacy(api_client):
+    response = api_client.get('/api/v1/relation-types/')
+    assert response.status_code == 200
+    assert len(response.data) >= 1

backend/tests/test_plugins_api.py

@@ -0,0 +1,27 @@
+import pytest
+
+
+@pytest.mark.django_db
+def test_plugin_manifest(api_client):
+    response = api_client.get('/api/v1/plugins/')
+    assert response.status_code == 200
+    ids = [p['id'] for p in response.data]
+    assert 'tags' in ids
+
+
+@pytest.mark.django_db
+def test_tags_crud(api_client, sample_contact):
+    create = api_client.post(
+        '/api/v1/plugins/tags/contact-tags/',
+        {'contact': sample_contact.id, 'label': 'коллеги'},
+        format='json',
+    )
+    assert create.status_code == 201
+    tag_id = create.data['id']
+
+    listing = api_client.get(f'/api/v1/plugins/tags/contact-tags/?contact_id={sample_contact.id}')
+    assert listing.status_code == 200
+    assert listing.data['count'] == 1
+
+    delete = api_client.delete(f'/api/v1/plugins/tags/contact-tags/{tag_id}/')
+    assert delete.status_code == 204

docs/EXTERNAL_PLUGINS.md

@@ -0,0 +1,50 @@
+# External Plugins Policy
+
+## Supported distribution (Phase D)
+
+### Backend (Python)
+
+- Package name: `social-graph-plugin-<id>`
+- Entry point group: `social_graph.plugins`
+- Manifest fields: `id`, `version`, `min_core_version`, `permissions[]`
+
+Example `pyproject.toml`:
+
+```toml
+[project.entry-points."social_graph.plugins"]
+tags = "social_graph_plugin_tags.plugin:TagsPlugin"
+```
+
+Install: `pip install social-graph-plugin-tags`
+
+Enable: `ENABLED_PLUGINS=tags` in backend environment.
+
+### Frontend (npm)
+
+- Package name: `@social-graph/plugin-<id>`
+- Default export: `PluginDefinition` (same shape as `registerPlugin()`)
+
+Build-time inclusion only (trusted packages). Runtime CDN loading is **not supported** for security reasons.
+
+Enable: `VITE_ENABLED_PLUGINS=tags,my-plugin`
+
+## Trust model
+
+| Source | Trust level | Loading |
+|--------|-------------|---------|
+| Monorepo `frontend/src/plugins/*` | Full | Build-time |
+| npm / pip packages from allowlist | Trusted | Build-time / deploy-time |
+| Arbitrary URL / user upload | Untrusted | **Blocked** |
+
+## Version compatibility
+
+Plugins declare `minCoreVersion`. Core version is `1.0.0` (`CORE_VERSION` in frontend, `SPECTACULAR_SETTINGS.VERSION` in backend).
+
+Breaking API changes require a new `/api/v2/` namespace.
+
+## Security checklist for external authors
+
+- Request minimal `permissions`
+- Do not access `localStorage` outside plugin namespace
+- Do not inject scripts into core DOM outside registered extension points
+- Use plugin-scoped Dexie tables only via `upgradeDexie`

docs/PLUGIN_AUTHOR_GUIDE.md

@@ -0,0 +1,63 @@
+# Plugin Author Guide
+
+This document describes how to build **internal** plugins for Social Graph.
+
+## Architecture overview
+
+- **Core** owns contacts, relations, network maps, graph shell, import/export.
+- **Plugins** extend the app via `registerPlugin()` without editing core files.
+- **Backend** plugins are Django apps registered through `plugins.registry` and `ENABLED_PLUGINS`.
+- **Frontend** plugins live under `frontend/src/plugins/<id>/` and are loaded at bootstrap.
+
+## Frontend plugin contract
+
+```javascript
+import { registerPlugin } from '../../core/pluginRegistry'
+
+registerPlugin({
+  id: 'my-plugin',
+  version: '1.0.0',
+  minCoreVersion: '1.0.0',
+  permissions: ['read:contacts'],
+  routes: [{ path: '/my', name: 'MyPlugin', component: MyView }],
+  navItems: [{ to: '/my', label: 'My plugin' }],
+  contactFormExtensions: [MyContactFieldset],
+  graphToolbarActions: [],
+  upgradeDexie(db) { /* db.version(N).stores({...}) */ },
+  syncContributor: {
+    entityType: 'plugin:my-plugin',
+    async pushChanges() {},
+    async pullChanges() {},
+  },
+  graphExtensions: {
+    extendNode(node) { return node },
+    extendEdge(edge) { return edge },
+  },
+})
+```
+
+Enable via `VITE_ENABLED_PLUGINS=my-plugin,tags` at build time.
+
+## Backend plugin contract
+
+1. Create Django app under `backend/plugins_<id>/`.
+2. Implement `Plugin` subclass in `plugin.py`.
+3. Register in `backend/plugins/registry.py`.
+4. Add app to `INSTALLED_APPS` and id to `ENABLED_PLUGINS` env var.
+
+API surface: `/api/v1/plugins/<id>/...`
+
+## Reference plugin: `tags`
+
+- Frontend: `frontend/src/plugins/tags/`
+- Backend: `backend/plugins_tags/`
+- Dexie table: `contactTags`
+- REST: `/api/v1/plugins/tags/contact-tags/`
+
+## Local-first backup format
+
+Plugin data should be included in backup v2+ under `plugins: { tags: [...] }` (planned extension). Current tags are stored in IndexedDB table `contactTags`.
+
+## Permissions (Phase C)
+
+Declared permissions are informational until JWT auth is enabled (`USE_JWT_AUTH=true`). Future scopes: `read:contacts`, `write:relations`, etc.

frontend/.env.example

@@ -0,0 +1,2 @@
+# Enabled frontend plugins (comma-separated)
+VITE_ENABLED_PLUGINS=tags

frontend/src/App.vue

@@ -48,6 +48,19 @@
           </svg>
           <span class="nav-label">Импорт</span>
         </RouterLink>
+        <RouterLink
+          v-for="item in pluginNavItems"
+          :key="item.to"
+          :to="item.to"
+          class="nav-link"
+          active-class="active"
+        >
+          <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+            <path d="M20.59 13.41l-7.17 7.17a2 2 0 0 1-2.83 0L2 12V2h10l8.59 8.59a2 2 0 0 1 0 2.82z"/>
+            <line x1="7" y1="7" x2="7.01" y2="7"/>
+          </svg>
+          <span class="nav-label">{{ item.label }}</span>
+        </RouterLink>
       </nav>
       <button
         class="nav-link nav-theme-btn"
@@ -86,8 +99,10 @@
 import { computed, onMounted, ref } from 'vue'
 import { RouterLink, RouterView } from 'vue-router'
 import { useContactsStore } from './stores/contacts'
+import { getPluginNavItems } from './core/pluginRegistry'
 
 const store = useContactsStore()
+const pluginNavItems = getPluginNavItems()
 const THEME_KEY = 'ui-theme'
 const currentTheme = ref('dark')
 

frontend/src/application/services/contactPluginService.js

@@ -0,0 +1,13 @@
+import { tagRepository } from '../../plugins/tags/tagRepository.local'
+
+/**
+ * Persist plugin form payload after contact create/update.
+ * @param {string|number} contactId
+ * @param {{ tags?: string[] }} pluginPayload
+ */
+export async function saveContactPluginData(contactId, pluginPayload = {}) {
+  if (!contactId || !pluginPayload) return
+  if (Array.isArray(pluginPayload.tags)) {
+    await tagRepository.setContactTags(contactId, pluginPayload.tags)
+  }
+}

frontend/src/application/services/graphDataService.js

@@ -0,0 +1,57 @@
+import { getGraphBundle } from '../usecases/graph'
+import { getRelationTypes } from '../../infrastructure/repositories/repositoryFactory'
+import { isLocalMode } from '../../infrastructure/config/dataMode'
+import api from '../../api'
+import { applyGraphExtensions } from '../../core/pluginRegistry'
+
+/**
+ * Unified graph data access for GraphView and NetworkMapView.
+ */
+export async function fetchGraphBundle({ mapId = null } = {}) {
+  let bundle
+  if (isLocalMode()) {
+    bundle = await getGraphBundle({ mapId })
+  } else {
+    const endpoint = mapId
+      ? `/network-map-graph/?map_id=${encodeURIComponent(mapId)}`
+      : '/graph/'
+    const [gRes, rtRes] = await Promise.all([
+      api.get(endpoint),
+      api.get('/relation-types/'),
+    ])
+    bundle = {
+      nodes: gRes.data.nodes || [],
+      edges: gRes.data.edges || [],
+      relationTypes: rtRes.data || [],
+    }
+  }
+
+  return {
+    ...bundle,
+    nodes: (bundle.nodes || []).map((n) => applyGraphExtensions('node', n)),
+    edges: (bundle.edges || []).map((e) => applyGraphExtensions('edge', e)),
+  }
+}
+
+export async function fetchGraphBundleFromStore(store, { mapId = null } = {}) {
+  const { buildGraphFromStore } = await import('../usecases/graph')
+  if (!store.contacts.length) await store.fetchContacts()
+  if (!store.relations.length) await store.fetchRelations()
+  const relationTypes = store.relationTypes.length
+    ? store.relationTypes
+    : await store.fetchRelationTypes()
+
+  const bundle = buildGraphFromStore(store.contacts, store.relations, relationTypes)
+  if (mapId) {
+    return fetchGraphBundle({ mapId })
+  }
+  return {
+    ...bundle,
+    nodes: bundle.nodes.map((n) => applyGraphExtensions('node', n)),
+    edges: bundle.edges.map((e) => applyGraphExtensions('edge', e)),
+  }
+}
+
+export async function fetchRelationTypes() {
+  return getRelationTypes()
+}

frontend/src/application/services/graphDataService.test.js

@@ -0,0 +1,26 @@
+import { describe, it, expect, vi } from 'vitest'
+
+vi.mock('../../infrastructure/config/dataMode', () => ({
+  isLocalMode: () => true,
+}))
+
+vi.mock('../../core/pluginRegistry', () => ({
+  applyGraphExtensions: (_kind, payload) => payload,
+}))
+
+vi.mock('../usecases/graph', () => ({
+  getGraphBundle: vi.fn(async () => ({
+    nodes: [{ id: '1', label: 'A' }],
+    edges: [],
+    relationTypes: [],
+  })),
+}))
+
+describe('graphDataService', () => {
+  it('fetchGraphBundle returns nodes from local use case', async () => {
+    const { fetchGraphBundle } = await import('./graphDataService.js')
+    const bundle = await fetchGraphBundle()
+    expect(bundle.nodes).toHaveLength(1)
+    expect(bundle.nodes[0].label).toBe('A')
+  })
+})

frontend/src/components/ContactForm.test.js

@@ -13,6 +13,10 @@ vi.mock('../application/usecases/networkMaps', () => ({
   listMembershipsByContact: vi.fn(async () => []),
 }))
 
+vi.mock('../core/pluginRegistry', () => ({
+  getContactFormExtensions: () => [],
+}))
+
 describe('ContactForm', () => {
   beforeEach(() => {
     vi.clearAllMocks()
@@ -21,10 +25,11 @@ describe('ContactForm', () => {
   it('emits submit with contact data and map ids', async () => {
     const wrapper = mount(ContactForm, { props: { initial: { name: 'Иван' } } })
     await wrapper.get('form').trigger('submit.prevent')
-    const [contactData, mapIds] = wrapper.emitted('submit')[0]
+    const [contactData, mapIds, pluginPayload] = wrapper.emitted('submit')[0]
     expect(contactData.name).toBe('Иван')
     expect(contactData.include_on_network_map).toBeUndefined()
     expect(mapIds).toEqual([])
+    expect(pluginPayload).toEqual({ tags: [] })
   })
 
   it('shows delete button when editing existing contact', async () => {

frontend/src/components/ContactForm.vue

@@ -45,6 +45,13 @@
       <label>Заметки</label>
       <textarea v-model="form.notes" class="form-control" placeholder="Дополнительная информация..." rows="3"></textarea>
     </div>
+    <component
+      :is="Ext"
+      v-for="(Ext, index) in contactFormExtensions"
+      :key="index"
+      :contact-id="initial?.id"
+      v-model="pluginTags"
+    />
     <div class="contact-form-footer">
       <button
         v-if="showDelete"
@@ -63,9 +70,10 @@
 </template>
 
 <script setup>
-import { reactive, watch, computed, onMounted } from 'vue'
+import { reactive, ref, watch, computed, onMounted } from 'vue'
 import { useNetworkMapsStore } from '../stores/networkMaps'
 import { listMembershipsByContact } from '../application/usecases/networkMaps'
+import { getContactFormExtensions } from '../core/pluginRegistry'
 
 const props = defineProps({
   initial: { type: Object, default: () => ({}) },
@@ -75,6 +83,8 @@ const props = defineProps({
 const emit = defineEmits(['submit', 'cancel', 'delete'])
 
 const mapsStore = useNetworkMapsStore()
+const contactFormExtensions = getContactFormExtensions()
+const pluginTags = ref([])
 
 const showDelete = computed(() => {
   if (props.deletable) return true
@@ -140,7 +150,7 @@ onMounted(async () => {
 
 function onSubmit() {
   const { mapIds, ...contactData } = form
-  emit('submit', contactData, mapIds)
+  emit('submit', contactData, mapIds, { tags: [...pluginTags.value] })
 }
 </script>
 

frontend/src/composables/useGraphData.js

@@ -1,29 +1,10 @@
-import { getGraphBundle, getMapChoices } from '../application/usecases/graph'
+/**
-import { isLocalMode } from '../infrastructure/config/dataMode'
+ * Re-export for backward compatibility.
-import api from '../api'
+ * @deprecated Use application/services/graphDataService.js
+ */
+export {
+  fetchGraphBundle,
+  fetchRelationTypes,
+} from '../application/services/graphDataService'
 
-export async function fetchGraphBundle({ graphEndpoint = '/graph/', mapId = null } = {}) {
+export { getMapChoices as fetchMapChoices } from '../application/usecases/graph'
-  if (isLocalMode()) {
-    return getGraphBundle({ mapId })
-  }
-  const endpoint = mapId
-    ? `/network-map-graph/?map_id=${encodeURIComponent(mapId)}`
-    : graphEndpoint
-  const [gRes, rtRes] = await Promise.all([
-    api.get(endpoint),
-    api.get('/relation-types/'),
-  ])
-  return {
-    nodes: gRes.data.nodes || [],
-    edges: gRes.data.edges || [],
-    relationTypes: rtRes.data || [],
-  }
-}
-
-export async function fetchMapChoices() {
-  if (isLocalMode()) {
-    return getMapChoices()
-  }
-  const { data } = await api.get('/network-map-choices/')
-  return data
-}

frontend/src/core/bootstrapPlugins.js

@@ -0,0 +1,19 @@
+import { ENABLED_PLUGINS } from './config/enabledPlugins'
+
+/**
+ * Load and register enabled plugins at app bootstrap.
+ */
+export async function bootstrapPlugins() {
+  const loaders = {
+    tags: () => import('../plugins/tags/index.js'),
+  }
+
+  for (const id of ENABLED_PLUGINS) {
+    const load = loaders[id]
+    if (!load) {
+      console.warn(`[plugins] Unknown plugin "${id}" — skipped`)
+      continue
+    }
+    await load()
+  }
+}

frontend/src/core/config/enabledPlugins.js

@@ -0,0 +1,12 @@
+/**
+ * Build-time list of enabled frontend plugins.
+ * Override via VITE_ENABLED_PLUGINS=tags,birthdays
+ */
+const raw = import.meta.env.VITE_ENABLED_PLUGINS || 'tags'
+
+export const ENABLED_PLUGINS = raw
+  .split(',')
+  .map((id) => id.trim())
+  .filter(Boolean)
+
+export const CORE_VERSION = '1.0.0'

frontend/src/core/pluginRegistry.js

@@ -0,0 +1,108 @@
+/**
+ * Plugin registry for the Social Graph platform.
+ * Plugins register routes, nav items, form extensions, Dexie upgrades, and sync contributors.
+ */
+
+const plugins = new Map()
+const navItems = []
+const contactFormExtensions = []
+const graphToolbarActions = []
+const dexieUpgraders = []
+const syncContributors = []
+
+/**
+ * @typedef {object} PluginDefinition
+ * @property {string} id
+ * @property {string} [version]
+ * @property {string} [minCoreVersion]
+ * @property {string[]} [permissions]
+ * @property {import('vue-router').RouteRecordRaw[]} [routes]
+ * @property {object[]} [navItems] - { to, label, icon? }
+ * @property {import('vue').Component[]} [contactFormExtensions]
+ * @property {object[]} [graphToolbarActions] - { id, label, onClick }
+ * @property {(db: import('dexie').Dexie) => void} [upgradeDexie]
+ * @property {object} [syncContributor] - { entityType, push, pull }
+ */
+
+/**
+ * @param {PluginDefinition} definition
+ */
+export function registerPlugin(definition) {
+  if (!definition?.id) {
+    throw new Error('Plugin must have an id')
+  }
+  plugins.set(definition.id, definition)
+
+  if (definition.routes?.length) {
+    definition.routes.forEach((route) => {
+      if (!route.meta) route.meta = {}
+      route.meta.pluginId = definition.id
+    })
+  }
+  if (definition.navItems?.length) {
+    navItems.push(...definition.navItems.map((item) => ({ ...item, pluginId: definition.id })))
+  }
+  if (definition.contactFormExtensions?.length) {
+    contactFormExtensions.push(...definition.contactFormExtensions)
+  }
+  if (definition.graphToolbarActions?.length) {
+    graphToolbarActions.push(...definition.graphToolbarActions)
+  }
+  if (typeof definition.upgradeDexie === 'function') {
+    dexieUpgraders.push(definition.upgradeDexie)
+  }
+  if (definition.syncContributor) {
+    syncContributors.push(definition.syncContributor)
+  }
+}
+
+export function getRegisteredPlugins() {
+  return [...plugins.values()]
+}
+
+export function getPluginRoutes() {
+  return getRegisteredPlugins().flatMap((p) => p.routes || [])
+}
+
+export function getPluginNavItems() {
+  return navItems
+}
+
+export function getContactFormExtensions() {
+  return contactFormExtensions
+}
+
+export function getGraphToolbarActions() {
+  return graphToolbarActions
+}
+
+export function applyDexiePluginUpgrades(db) {
+  dexieUpgraders.forEach((fn) => fn(db))
+}
+
+export function getSyncContributors() {
+  return syncContributors
+}
+
+/**
+ * Apply graph extension hooks from all plugins.
+ * @param {'node'|'edge'|'filters'} kind
+ * @param {*} payload
+ */
+export function applyGraphExtensions(kind, payload) {
+  let result = payload
+  for (const plugin of plugins.values()) {
+    const hooks = plugin.graphExtensions
+    if (!hooks) continue
+    if (kind === 'node' && hooks.extendNode) {
+      result = hooks.extendNode(result) || result
+    }
+    if (kind === 'edge' && hooks.extendEdge) {
+      result = hooks.extendEdge(result) || result
+    }
+    if (kind === 'filters' && hooks.extendFilters) {
+      result = hooks.extendFilters(result) || result
+    }
+  }
+  return result
+}

frontend/src/core/pluginRegistry.test.js

@@ -0,0 +1,14 @@
+import { describe, it, expect } from 'vitest'
+import { registerPlugin, getPluginNavItems, getRegisteredPlugins } from './pluginRegistry.js'
+
+describe('pluginRegistry', () => {
+  it('registers nav items from plugin definition', () => {
+    registerPlugin({
+      id: 'test-plugin',
+      navItems: [{ to: '/test', label: 'Test' }],
+    })
+    const items = getPluginNavItems()
+    expect(items.some((i) => i.to === '/test')).toBe(true)
+    expect(getRegisteredPlugins().some((p) => p.id === 'test-plugin')).toBe(true)
+  })
+})

frontend/src/features/graph/composables/useVisNetwork.js

@@ -0,0 +1,53 @@
+import { Network, DataSet } from 'vis-network/standalone'
+
+/**
+ * Create vis-network instance with shared defaults.
+ */
+export function createVisNetwork(container, nodes, edges, options = {}) {
+  const nodesDS = new DataSet(nodes)
+  const edgesDS = new DataSet(edges)
+  const network = new Network(
+    container,
+    { nodes: nodesDS, edges: edgesDS },
+    {
+      layout: { improvedLayout: false },
+      interaction: {
+        tooltipDelay: 200,
+        hover: true,
+        hideEdgesOnDrag: true,
+        selectConnectedEdges: false,
+        zoomView: true,
+        dragView: true,
+        dragNodes: true,
+      },
+      edges: { chosen: { label: false } },
+      nodes: { borderWidth: 1.5 },
+      ...options,
+    }
+  )
+  return { network, nodesDS, edgesDS }
+}
+
+export function destroyVisNetwork(network, resizeObserver = null) {
+  resizeObserver?.disconnect()
+  network?.destroy()
+}
+
+export function defaultPhysicsOptions(enabled, { fitOnStabilize = true } = {}) {
+  return {
+    enabled,
+    solver: 'forceAtlas2Based',
+    forceAtlas2Based: {
+      gravitationalConstant: -120,
+      centralGravity: 0.002,
+      springLength: 200,
+      springConstant: 0.035,
+      damping: 0.5,
+      avoidOverlap: 1,
+    },
+    stabilization: enabled
+      ? { iterations: 200, fit: fitOnStabilize, updateInterval: 25 }
+      : undefined,
+    maxVelocity: 20,
+  }
+}

frontend/src/infrastructure/repositories/repositoryFactory.js

@@ -32,16 +32,20 @@ export function getNetworkMapMembershipRepository() {
 
 export async function getRelationTypes() {
   if (mode() === 'remote') {
-    const { data } = await api.get('/relation-types/')
+    const { data } = await api.get('/meta/choices/')
-    return data
+    return data.relation_types
   }
   return RELATION_TYPES
 }
 
 export async function getNetworkMapChoices() {
   if (mode() === 'remote') {
-    const { data } = await api.get('/network-map-choices/')
+    const { data } = await api.get('/meta/choices/')
-    return data
+    return {
+      life_spheres: data.life_spheres,
+      network_circles: data.network_circles,
+      interaction_intensities: data.interaction_intensities,
+    }
   }
   return {
     life_spheres: LIFE_SPHERES,
@@ -49,3 +53,16 @@ export async function getNetworkMapChoices() {
     interaction_intensities: INTERACTION_INTENSITIES,
   }
 }
+
+export async function getMetaChoices() {
+  if (mode() === 'remote') {
+    const { data } = await api.get('/meta/choices/')
+    return data
+  }
+  return {
+    relation_types: RELATION_TYPES,
+    life_spheres: LIFE_SPHERES,
+    network_circles: NETWORK_CIRCLES,
+    interaction_intensities: INTERACTION_INTENSITIES,
+  }
+}

frontend/src/infrastructure/sync/remoteSyncAdapter.js

@@ -0,0 +1,54 @@
+import { listPendingChanges, ackChanges } from './changeLogRepository'
+import { getDataMode } from '../config/dataMode'
+import { getSyncContributors } from '../../core/pluginRegistry'
+import { noopSyncAdapter } from './noopSyncAdapter'
+
+/**
+ * Hybrid sync orchestrator: pushes core changelog + plugin contributors.
+ */
+export const remoteSyncAdapter = {
+  async pushChanges() {
+    if (getDataMode() === 'local') {
+      return noopSyncAdapter.pushChanges()
+    }
+
+    const pending = await listPendingChanges()
+    let pushed = 0
+
+    for (const change of pending) {
+      // Core entity sync will be implemented when remote hybrid mode is enabled.
+      pushed += 1
+    }
+
+    for (const contributor of getSyncContributors()) {
+      if (contributor.pushChanges) {
+        await contributor.pushChanges()
+      }
+    }
+
+    if (pending.length) {
+      await ackChanges(pending.map((c) => c.id))
+    }
+
+    return { pushed, pending: Math.max(0, pending.length - pushed) }
+  },
+
+  async pullChanges() {
+    if (getDataMode() === 'local') {
+      return noopSyncAdapter.pullChanges()
+    }
+
+    let pulled = 0
+    for (const contributor of getSyncContributors()) {
+      if (contributor.pullChanges) {
+        const result = await contributor.pullChanges()
+        pulled += result?.pulled || 0
+      }
+    }
+    return { pulled }
+  },
+
+  async ack() {
+    return { ok: true }
+  },
+}

frontend/src/infrastructure/sync/syncAdapter.js

@@ -1,8 +1,14 @@
+import { getSyncContributors } from '../../core/pluginRegistry'
 import { noopSyncAdapter } from './noopSyncAdapter'
+import { remoteSyncAdapter } from './remoteSyncAdapter'
 
 /**
  * @returns {{pushChanges: Function, pullChanges: Function, ack: Function}}
  */
 export function getSyncAdapter() {
-  return noopSyncAdapter
+  const contributors = getSyncContributors()
+  if (!contributors.length) {
+    return noopSyncAdapter
+  }
+  return remoteSyncAdapter
 }

frontend/src/main.js

@@ -1,10 +1,21 @@
 import { createApp } from 'vue'
 import { createPinia } from 'pinia'
 import App from './App.vue'
-import router from './router'
+import { bootstrapPlugins } from './core/bootstrapPlugins'
+import { applyDexiePluginUpgrades } from './core/pluginRegistry'
+import { localDb } from './infrastructure/db/localDb'
+import { initRouter } from './router'
 import './assets/style.css'
 
-const app = createApp(App)
+async function bootstrap() {
-app.use(createPinia())
+  await bootstrapPlugins()
-app.use(router)
+  applyDexiePluginUpgrades(localDb)
-app.mount('#app')
+  const router = await initRouter()
+
+  const app = createApp(App)
+  app.use(createPinia())
+  app.use(router)
+  app.mount('#app')
+}
+
+bootstrap()

frontend/src/plugins/_template/index.js

@@ -0,0 +1,18 @@
+/**
+ * Template for new frontend plugins.
+ * Copy to frontend/src/plugins/<your-id>/ and register in bootstrapPlugins.js loaders.
+ */
+import { registerPlugin } from '../../core/pluginRegistry'
+
+export function registerMyPlugin() {
+  registerPlugin({
+    id: 'my-plugin',
+    version: '1.0.0',
+    minCoreVersion: '1.0.0',
+    permissions: [],
+    routes: [],
+    navItems: [],
+  })
+}
+
+// registerMyPlugin()

frontend/src/plugins/tags/ContactTagsFieldset.vue

@@ -0,0 +1,60 @@
+<template>
+  <div class="form-group">
+    <label>Теги</label>
+    <input
+      v-model="tagsText"
+      class="form-control"
+      placeholder="коллеги, спорт, семья (через запятую)"
+      @blur="emitTags"
+    />
+    <p v-if="tags.length" class="text-muted" style="font-size:12px;margin-top:6px;">
+      <span v-for="tag in tags" :key="tag" class="tag-chip">{{ tag }}</span>
+    </p>
+  </div>
+</template>
+
+<script setup>
+import { ref, watch, onMounted } from 'vue'
+import { tagRepository } from './tagRepository.local'
+
+const props = defineProps({
+  contactId: { type: [String, Number], default: null },
+  modelValue: { type: Array, default: () => [] },
+})
+
+const emit = defineEmits(['update:modelValue'])
+
+const tags = ref([...props.modelValue])
+const tagsText = ref(tags.value.join(', '))
+
+async function loadTags() {
+  if (!props.contactId) return
+  const rows = await tagRepository.listByContact(props.contactId)
+  tags.value = rows.map((r) => r.label)
+  tagsText.value = tags.value.join(', ')
+  emit('update:modelValue', tags.value)
+}
+
+function emitTags() {
+  tags.value = tagsText.value
+    .split(',')
+    .map((s) => s.trim())
+    .filter(Boolean)
+  emit('update:modelValue', [...new Set(tags.value)])
+}
+
+watch(() => props.contactId, loadTags, { immediate: true })
+onMounted(loadTags)
+</script>
+
+<style scoped>
+.tag-chip {
+  display: inline-block;
+  margin-right: 6px;
+  padding: 2px 8px;
+  border-radius: 999px;
+  background: var(--surface-alt);
+  border: 1px solid var(--border);
+  font-size: 11px;
+}
+</style>

frontend/src/plugins/tags/TagsView.vue

@@ -0,0 +1,63 @@
+<template>
+  <div>
+    <div class="page-header">
+      <h2>Теги контактов</h2>
+    </div>
+    <div class="page-content content-narrow">
+      <div class="card">
+        <p class="text-muted section-subtitle">
+          Группировка контактов метками. Плагин <strong>tags</strong> (reference implementation).
+        </p>
+        <div v-if="loading" class="spinner"></div>
+        <div v-else-if="!grouped.length" class="empty-state">
+          <p>Тегов пока нет. Добавьте теги в карточке контакта.</p>
+        </div>
+        <div v-else class="tag-groups">
+          <div v-for="group in grouped" :key="group.label" class="tag-group">
+            <h3>{{ group.label }} <span class="text-muted">({{ group.contacts.length }})</span></h3>
+            <ul>
+              <li v-for="name in group.contacts" :key="name">{{ name }}</li>
+            </ul>
+          </div>
+        </div>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup>
+import { ref, computed, onMounted } from 'vue'
+import { useContactsStore } from '../../stores/contacts'
+import { tagRepository } from './tagRepository.local'
+
+const store = useContactsStore()
+const loading = ref(true)
+const allTags = ref([])
+
+const grouped = computed(() => {
+  const byLabel = new Map()
+  const contactById = new Map(store.contacts.map((c) => [String(c.id), c.name]))
+  for (const tag of allTags.value) {
+    const name = contactById.get(String(tag.contactId)) || tag.contactId
+    if (!byLabel.has(tag.label)) byLabel.set(tag.label, [])
+    byLabel.get(tag.label).push(name)
+  }
+  return [...byLabel.entries()]
+    .map(([label, contacts]) => ({ label, contacts: contacts.sort((a, b) => String(a).localeCompare(String(b), 'ru')) }))
+    .sort((a, b) => a.label.localeCompare(b.label, 'ru'))
+})
+
+onMounted(async () => {
+  await store.fetchContacts()
+  allTags.value = await tagRepository.listAll()
+  loading.value = false
+})
+</script>
+
+<style scoped>
+.content-narrow { max-width: 640px; }
+.section-subtitle { margin-bottom: 16px; }
+.tag-group { margin-bottom: 16px; }
+.tag-group h3 { font-size: 14px; margin-bottom: 6px; }
+.tag-group ul { margin: 0; padding-left: 18px; font-size: 13px; }
+</style>

frontend/src/plugins/tags/index.js

@@ -0,0 +1,60 @@
+import { registerPlugin } from '../../core/pluginRegistry'
+import TagsView from './TagsView.vue'
+import ContactTagsFieldset from './ContactTagsFieldset.vue'
+import { tagRepository } from './tagRepository.local'
+
+registerPlugin({
+  id: 'tags',
+  version: '1.0.0',
+  minCoreVersion: '1.0.0',
+  permissions: ['read:contacts', 'write:contacts'],
+  routes: [
+    {
+      path: '/tags',
+      name: 'Tags',
+      component: TagsView,
+      meta: { title: 'Теги' },
+    },
+  ],
+  navItems: [
+    {
+      to: '/tags',
+      label: 'Теги',
+      icon: 'tags',
+    },
+  ],
+  graphToolbarActions: [
+    {
+      id: 'open-tags',
+      label: 'Теги',
+      onClick: ({ router }) => router.push('/tags'),
+    },
+  ],
+  contactFormExtensions: [ContactTagsFieldset],
+  upgradeDexie(db) {
+    db.version(3).stores({
+      contacts: 'id, name, updatedAt, deletedAt, workspaceId',
+      relations: 'id, source, target, updatedAt, deletedAt, workspaceId',
+      networkMaps: 'id, name, updatedAt, deletedAt, workspaceId',
+      networkMapMemberships: 'id, mapId, contactId, updatedAt, deletedAt, [mapId+contactId]',
+      meta: 'key',
+      changelog: 'id, ts, entityType, entityId, syncStatus, workspaceId',
+      contactTags: 'id, contactId, label, updatedAt, deletedAt, workspaceId',
+    })
+  },
+  syncContributor: {
+    entityType: 'plugin:tags',
+    async pushChanges() {
+      return { pushed: 0 }
+    },
+    async pullChanges() {
+      return { pulled: 0 }
+    },
+  },
+  graphExtensions: {
+    extendNode(node) {
+      return node
+    },
+  },
+  tagRepository,
+})

frontend/src/plugins/tags/tagRepository.local.js

@@ -0,0 +1,49 @@
+import { localDb } from '../../infrastructure/db/localDb'
+import { generateId } from '../../lib/uuid'
+
+function nowIso() {
+  return new Date().toISOString()
+}
+
+export const tagRepository = {
+  async listByContact(contactId) {
+    const sid = String(contactId)
+    const all = await localDb.contactTags?.toArray() || []
+    return all.filter((t) => !t.deletedAt && String(t.contactId) === sid)
+  },
+
+  async listAll() {
+    const all = await localDb.contactTags?.toArray() || []
+    return all.filter((t) => !t.deletedAt)
+  },
+
+  async setContactTags(contactId, labels = []) {
+    if (!localDb.contactTags) return []
+    const sid = String(contactId)
+    const ts = nowIso()
+    const normalized = [...new Set(labels.map((l) => String(l).trim()).filter(Boolean))]
+    const existing = await this.listByContact(sid)
+    const existingLabels = new Set(existing.map((t) => t.label))
+
+    for (const tag of existing) {
+      if (!normalized.includes(tag.label)) {
+        await localDb.contactTags.update(tag.id, { deletedAt: ts, updatedAt: ts })
+      }
+    }
+
+    for (const label of normalized) {
+      if (existingLabels.has(label)) continue
+      await localDb.contactTags.put({
+        id: generateId(),
+        contactId: sid,
+        label,
+        workspaceId: 'personal',
+        version: 1,
+        createdAt: ts,
+        updatedAt: ts,
+        deletedAt: null,
+      })
+    }
+    return this.listByContact(sid)
+  },
+}

frontend/src/router/index.js

@@ -1,6 +1,7 @@
 import { createRouter, createWebHistory } from 'vue-router'
+import { getPluginRoutes } from '../core/pluginRegistry'
 
-const routes = [
+const coreRoutes = [
   {
     path: '/',
     redirect: '/graph',
@@ -37,9 +38,25 @@ const routes = [
   },
 ]
 
-const router = createRouter({
+let router = null
-  history: createWebHistory(),
-  routes,
-})
 
-export default router
+export function buildRoutes() {
+  return [...coreRoutes, ...getPluginRoutes()]
+}
+
+export async function initRouter() {
+  router = createRouter({
+    history: createWebHistory(),
+    routes: buildRoutes(),
+  })
+  return router
+}
+
+export function getRouter() {
+  if (!router) {
+    throw new Error('Router not initialized. Call initRouter() after bootstrapPlugins().')
+  }
+  return router
+}
+
+export default getRouter

frontend/src/views/ContactDetailView.vue

@@ -246,9 +246,11 @@ async function loadContact() {
   await mapsStore.fetchContactMemberships(contactId.value)
 }
 
-async function onUpdate(data, mapIds) {
+async function onUpdate(data, mapIds, pluginPayload) {
   await store.updateContact(contactId.value, data)
   await mapsStore.setContactMapMemberships(contactId.value, mapIds)
+  const { saveContactPluginData } = await import('../application/services/contactPluginService')
+  await saveContactPluginData(contactId.value, pluginPayload)
   contact.value = { ...contact.value, ...data }
   editing.value = false
   await mapsStore.fetchContactMemberships(contactId.value)

frontend/src/views/ContactsView.vue

@@ -281,11 +281,13 @@ function onRelationCreated() {
 
 function goTo(id) { router.push(`/contacts/${id}`) }
 
-async function onCreate(data, mapIds) {
+async function onCreate(data, mapIds, pluginPayload) {
   const created = await store.createContact(data)
   if (mapIds?.length) {
     await mapsStore.setContactMapMemberships(created.id, mapIds)
   }
+  const { saveContactPluginData } = await import('../application/services/contactPluginService')
+  await saveContactPluginData(created.id, pluginPayload)
   showCreate.value = false
 }
 
@@ -293,9 +295,11 @@ function openEdit(c) {
   editTarget.value = { ...c }
 }
 
-async function onUpdate(data, mapIds) {
+async function onUpdate(data, mapIds, pluginPayload) {
   await store.updateContact(editTarget.value.id, data)
   await mapsStore.setContactMapMemberships(editTarget.value.id, mapIds)
+  const { saveContactPluginData } = await import('../application/services/contactPluginService')
+  await saveContactPluginData(editTarget.value.id, pluginPayload)
   editTarget.value = null
 }
 

frontend/src/views/GraphView.vue

@@ -21,6 +21,17 @@
         :active-values="activeFilters"
         @toggle="toggleFilter"
       />
+      <div v-if="graphToolbarActions.length" class="graph-plugin-actions">
+        <button
+          v-for="action in graphToolbarActions"
+          :key="action.id"
+          type="button"
+          class="btn btn-secondary btn-sm"
+          @click="runGraphToolbarAction(action)"
+        >
+          {{ action.label }}
+        </button>
+      </div>
     </div>
 
     <div class="graph-area" ref="graphArea">
@@ -150,7 +161,7 @@
 defineOptions({ name: 'Graph' })
 
 import { ref, computed, onMounted, onUnmounted, onActivated, onDeactivated, nextTick, watch } from 'vue'
-import { RouterLink } from 'vue-router'
+import { RouterLink, useRouter } from 'vue-router'
 import { Network, DataSet } from 'vis-network/standalone'
 import { useContactsStore } from '../stores/contacts'
 import { useCtrlLinkSelection } from '../composables/useCtrlLinkSelection'
@@ -168,6 +179,7 @@ import GraphNodeContextMenu from '../components/GraphNodeContextMenu.vue'
 import GraphEdgeContextMenu from '../components/GraphEdgeContextMenu.vue'
 import EditRelationModal from '../components/EditRelationModal.vue'
 import { useGraphNodeContextMenu } from '../composables/useGraphNodeContextMenu.js'
+import { getGraphToolbarActions } from '../core/pluginRegistry'
 
 let themeObserver = null
 let detachContextHandler = null
@@ -191,6 +203,8 @@ function openNodeInfo(node) {
 }
 
 const store = useContactsStore()
+const router = useRouter()
+const graphToolbarActions = getGraphToolbarActions()
 const graphArea = ref(null)
 const graphContainer = ref(null)
 const loading = ref(true)
@@ -774,6 +788,10 @@ function toggleChrome() {
   nextTick(() => network.value?.redraw())
 }
 
+function runGraphToolbarAction(action) {
+  action.onClick?.({ router })
+}
+
 watch(() => store.dataRevision, async (revision) => {
   if (!network.value || revision === syncedRevision) return
   await applyGraphDataFromStore()
@@ -832,6 +850,11 @@ onUnmounted(() => {
   flex-shrink: 0;
   padding: 0 28px 10px;
 }
+.graph-plugin-actions {
+  display: flex;
+  gap: 8px;
+  margin-top: 8px;
+}
 .graph-chrome-bar {
   display: flex;
   justify-content: center;