Complete regional history live validation

frontend/src/App.tsx

@@ -65,6 +65,7 @@ function App(): JSX.Element {
   const [activeWorkspace, setActiveWorkspace] = useState<WorkspaceKey>('map')
   const [inspectorOpen, setInspectorOpen] = useState(false)
   const [mapContentMode, setMapContentMode] = useState<'dataset' | 'analysis'>('dataset')
+  const [mapContextSourceLabel, setMapContextSourceLabel] = useState<string | null>(null)
   useEffect(() => {
     window.scrollTo({ top: 0, left: 0 })
     setInspectorOpen(false)
@@ -715,7 +716,9 @@ function App(): JSX.Element {
     ? REGIONAL_WORKSPACE_LABEL
     : selectedProject?.name ?? 'Geen werkruimte'
   const areaContextLabel = selectedArea?.name ?? (areas.length > 0 ? 'Kies een gebied' : 'Geen gebied')
-  const datasetContextLabel = analysisMapLayerActive && mapFeatureCollection
+  const datasetContextLabel = activeWorkspace === 'map' && mapContextSourceLabel
+    ? mapContextSourceLabel
+    : analysisMapLayerActive && mapFeatureCollection
     ? `${mapLayerLabel} · controle vereist`
     : selectedDataset
       ? getDatasetDisplayName(selectedDataset)
@@ -1035,6 +1038,7 @@ function App(): JSX.Element {
               selectedMapDatasetId={selectedDataset && availableMapDatasets.some((dataset) => dataset.id === selectedDataset.id) ? selectedDataset.id : ''}
               selectedFeature={selectedMapFeature}
               onSelectMapArea={setSelectedMapAreaId}
+              onSetContextSourceLabel={setMapContextSourceLabel}
               onOpenDatasetInMap={openDatasetInMap}
               onSetAreaLayerVisible={setAreaLayerVisible}
               onSetAreaLayerOpacity={setAreaLayerOpacity}

frontend/src/components/map/MapWorkspace.tsx

@@ -559,6 +559,7 @@ interface MapWorkspaceProps {
   availableMapDatasets: DatasetCreateResponse[]
   selectedMapDatasetId: string
   onSelectMapArea: (areaId: string) => void
+  onSetContextSourceLabel: (label: string | null) => void
   onOpenDatasetInMap: (dataset: DatasetCreateResponse) => void
   onSetAreaLayerVisible: (visible: boolean) => void
   onSetAreaLayerOpacity: (opacity: number) => void
@@ -639,6 +640,7 @@ export function MapWorkspace({
   availableMapDatasets,
   selectedMapDatasetId,
   onSelectMapArea,
+  onSetContextSourceLabel,
   onOpenDatasetInMap,
   onSetAreaLayerVisible,
   onSetAreaLayerOpacity,
@@ -776,6 +778,14 @@ export function MapWorkspace({
   const activeTemporalSeriesGroup = activeTemporalSeriesGroups.find((group) => group.key === selectedTemporalSeriesKey)
     ?? activeTemporalSeriesGroups[0]
   const activeTemporalSeries = activeTemporalSeriesGroup?.items ?? EMPTY_TEMPORAL_SERIES
+
+  useEffect(() => {
+    onSetContextSourceLabel(
+      analysisMode === 'evolution' ? activeTemporalSeriesGroup?.label ?? null : null,
+    )
+    return () => onSetContextSourceLabel(null)
+  }, [activeTemporalSeriesGroup?.label, analysisMode, onSetContextSourceLabel])
+
   const themeResults = useMemo(
     () =>
       themeInsights.flatMap((insight) => {