ifcedit: include IfcSpace in default QTO element scope

IfcSpace is not a subtype of IfcElement, so quantify.run_quantify()'s
default selector silently skipped all spaces, reporting
elements_quantified: 0 with no error or warning.

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src/ifcedit/tests/test_quantify.py

@@ -85,3 +85,20 @@ class TestRunQuantify:
     def test_empty_selector_runs_on_all(self, quantify_model):
         result = run_quantify(quantify_model, "IFC4QtoBaseQuantities", selector=None)
         assert result["ok"] is True
+
+    def test_default_selector_includes_spaces(self, quantify_model, monkeypatch):
+        """IfcSpace is not a subtype of IfcElement, so the default scope must add it explicitly."""
+        import ifc5d.qto
+
+        seen_elements = {}
+
+        def fake_quantify(ifc_file, elements, rules):
+            seen_elements["elements"] = elements
+            return {}
+
+        monkeypatch.setattr(ifc5d.qto, "quantify", fake_quantify)
+
+        space = ifcopenshell.api.root.create_entity(quantify_model, ifc_class="IfcSpace", name="TestSpace")
+        run_quantify(quantify_model, "IFC4QtoBaseQuantities")
+
+        assert space in seen_elements["elements"]