Add network map UX and theme support.

Introduce network map view/components with filtering and positioning, expand contacts/map backend fields and migrations, and add a persistent light/dark theme toggle with graph label color updates for readability.

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

backend/contacts/serializers.py

@@ -10,6 +10,9 @@ 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']
@@ -30,7 +33,8 @@ class RelationSerializer(serializers.ModelSerializer):
         fields = [
             'id', 'source', 'source_name',
             'target', 'target_name',
-            'relation_type', 'description', 'created_at',
+            'relation_type', 'description', 'interaction_intensity',
+            'created_at',
         ]
         read_only_fields = ['id', 'created_at', 'source_name', 'target_name']
 
@@ -56,6 +60,9 @@ 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
         ]
@@ -69,6 +76,8 @@ class GraphSerializer(serializers.Serializer):
                 '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,
             }
             for r in relations
         ]