Add settings page and configurable network map types.

Let users define sector/circle labels and geometry per map type, choose a type when creating maps, and sync types through local backup and API migrations.

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

backend/core/choices.py

@@ -38,3 +38,12 @@ def choices_payload():
         'network_circles': [{'value': v, 'label': l} for v, l in NETWORK_CIRCLES],
         'interaction_intensities': [{'value': v, 'label': l} for v, l in INTERACTION_INTENSITY],
     }
+
+
+DEFAULT_MAP_TYPE_SECTORS = [
+    {'key': v, 'label': l} for v, l in LIFE_SPHERES
+]
+
+DEFAULT_MAP_TYPE_CIRCLES = [
+    {'key': v, 'label': l} for v, l in NETWORK_CIRCLES
+]