fix: clear stale regional map results

backend/tests/test_sprint192_regional_map_state.py

@@ -0,0 +1,36 @@
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+
+
+def read(path: str) -> str:
+    return (ROOT / path).read_text(encoding="utf-8")
+
+
+def test_work_area_change_clears_stale_spatial_results_before_switching_area() -> None:
+    workspace = read("frontend/src/components/map/MapWorkspace.tsx")
+
+    assert "const handleSelectMapArea = (areaId: string) => {" in workspace
+    assert "clearAreaSelection()\n    onSelectMapArea(areaId)" in workspace
+    assert workspace.count("handleSelectMapArea(event.target.value)") == 2
+
+
+def test_cancelled_selection_requests_cannot_restore_stale_results() -> None:
+    selection_hook = read("frontend/src/hooks/useMapSelectionExtract.ts")
+    themes_hook = read("frontend/src/hooks/useMapThemeSelectionInsights.ts")
+
+    assert "const requestSequence = useRef(0)" in selection_hook
+    assert "requestSequence.current += 1\n    setMapSelectionBbox(null)" in selection_hook
+    assert "if (requestSequence.current !== sequence)" in selection_hook
+    assert "const requestSequence = useRef(0)" in themes_hook
+    assert "requestSequence.current += 1\n    setThemeInsights([])" in themes_hook
+    assert "if (requestSequence.current !== sequence)" in themes_hook
+
+
+def test_viewport_status_names_the_active_reference_layer() -> None:
+    hook = read("frontend/src/hooks/useViewportVectorLayer.ts")
+
+    assert "load buildings from PostGIS" not in hook
+    assert "selectedDataset?.reference_layer_name?.trim() || 'features'" in hook
+    assert "to load ${layerLabel} from PostGIS" in hook