Refine graph explorer controls

tests/test_graph_explorer.py

@@ -42,6 +42,8 @@ def test_graph_explorer_manifest_and_payload_validate() -> None:
     assert manifest["profile_persistence"] == "local"
     assert manifest["shareable_state"]["profile_id"] is True
     assert {layer["id"] for layer in manifest["layers"]} >= {"server", "deployment"}
+    filter_labels = {field["id"]: field["label"] for field in manifest["filter"]["fields"]}
+    assert filter_labels["layer"] == "Node Type"
     nodes = [element for element in payload["elements"] if "source" not in element["data"]]
     edges = [element for element in payload["elements"] if "source" in element["data"]]
     registered_only = next(
@@ -204,6 +206,11 @@ def test_registry_serves_graph_explorer_exports(tmp_path: Path) -> None:
         assert 'id="graph-canvas"' in page
         assert 'id="mode-select"' in page
         assert 'id="layout-select"' in page
+        assert 'id="node-type-filter"' in page
+        assert 'id="edge-type-filter"' in page
+        assert "Node Types" in page
+        assert "Edge Types" in page
+        assert 'id="layer-filter"' not in page
         assert 'id="profile-select"' in page
         assert 'id="profile-name"' in page
         assert 'id="orientation-list"' in page