release: bump version to 0.66.0

backend/tests/test_visualization_compute_centers.py

@@ -816,6 +816,27 @@ async def test_visualization_geo_summary_returns_counts(monkeypatch):
         app.dependency_overrides.clear()
 
 
+@pytest.mark.asyncio
+async def test_empty_cable_layers_return_empty_feature_collections():
+    class _ScalarResult:
+        def scalars(self):
+            class _Scalars:
+                def all(self):
+                    return []
+
+            return _Scalars()
+
+    class _FakeSession:
+        async def execute(self, _query):
+            return _ScalarResult()
+
+    cables = await visualization_api._build_cables_geojson(_FakeSession())
+    landing_points = await visualization_api._build_landing_points_geojson(_FakeSession())
+
+    assert cables == {"type": "FeatureCollection", "features": []}
+    assert landing_points == {"type": "FeatureCollection", "features": []}
+
+
 @pytest.mark.asyncio
 async def test_collect_location_endpoint_returns_candidates_for_known_record(monkeypatch):
     def _fake_ror(query):