Add multiple network maps, graph UX improvements, and full backup import.

Support per-map contact membership with scoped graph views, relation editing on edges, layout caching, and automatic detection of full JSON backups so contacts and relations import together.

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

backend/contacts/serializers.py

@@ -1,5 +1,5 @@
 from rest_framework import serializers
-from .models import Contact, Relation
+from .models import Contact, Relation, NetworkMap, NetworkMapMembership
 
 
 class ContactSerializer(serializers.ModelSerializer):
@@ -10,9 +10,6 @@ class ContactSerializer(serializers.ModelSerializer):
         fields = [
             'id', 'name', 'email', 'phone',
             'organization', 'position', 'notes',
-            'life_sphere', 'network_circle', 'importance',
-            'include_on_network_map',
-            'map_angle', 'map_radius_ratio',
             'created_at', 'updated_at', 'relations_count',
         ]
         read_only_fields = ['id', 'created_at', 'updated_at', 'relations_count']
@@ -46,6 +43,36 @@ class RelationSerializer(serializers.ModelSerializer):
         return data
 
 
+class NetworkMapSerializer(serializers.ModelSerializer):
+    memberships_count = serializers.SerializerMethodField()
+
+    class Meta:
+        model = NetworkMap
+        fields = [
+            'id', 'name', 'description',
+            'created_at', 'updated_at', 'memberships_count',
+        ]
+        read_only_fields = ['id', 'created_at', 'updated_at', 'memberships_count']
+
+    def get_memberships_count(self, obj):
+        return obj.memberships.count()
+
+
+class NetworkMapMembershipSerializer(serializers.ModelSerializer):
+    contact_name = serializers.CharField(source='contact.name', read_only=True)
+    map_name = serializers.CharField(source='map.name', read_only=True)
+
+    class Meta:
+        model = NetworkMapMembership
+        fields = [
+            'id', 'map', 'map_name', 'contact', 'contact_name',
+            'life_sphere', 'network_circle', 'importance',
+            'map_angle', 'map_radius_ratio',
+            'created_at', 'updated_at',
+        ]
+        read_only_fields = ['id', 'created_at', 'updated_at', 'contact_name', 'map_name']
+
+
 class GraphSerializer(serializers.Serializer):
     """Граф для vis.js: nodes + edges."""
 
@@ -60,9 +87,6 @@ class GraphSerializer(serializers.Serializer):
                 'label': c.name,
                 'title': f'{c.organization}\n{c.position}'.strip() or c.name,
                 'group': c.organization or 'default',
-                'life_sphere': c.life_sphere,
-                'network_circle': c.network_circle,
-                'importance': c.importance,
             }
             for c in contacts
         ]