fix: align Mol explorer primary metrics

frontend/src/components/map/MapWorkspace.tsx

@@ -106,6 +106,19 @@ function selectionAreaSquareMetres(bbox: VectorSelectionBBox | null): number | n
   return Math.max(0, widthMetres * heightMetres)
 }
 
+function bboxesEqual(left: VectorSelectionBBox | null, right: VectorSelectionBBox | null): boolean {
+  if (!left || !right) {
+    return false
+  }
+  const tolerance = 1e-9
+  return (
+    Math.abs(left.min_x - right.min_x) < tolerance &&
+    Math.abs(left.min_y - right.min_y) < tolerance &&
+    Math.abs(left.max_x - right.max_x) < tolerance &&
+    Math.abs(left.max_y - right.max_y) < tolerance
+  )
+}
+
 function formatArea(areaSquareMetres: number | null): string {
   if (areaSquareMetres === null) {
     return 'Nog niet geselecteerd'
@@ -469,14 +482,29 @@ export function MapWorkspace({
   )
   const activeTheme = DATA_THEMES.find((theme) => theme.id === activeThemeId) ?? DATA_THEMES[0]
   const activeThemeDataset = themeDatasetMap[activeTheme.id]
-  const selectedAreaSquareMetres = useMemo(() => selectionAreaSquareMetres(mapSelectionBbox), [mapSelectionBbox])
-  const selectedResultTotal = mapSelectionResult?.total_feature_count ?? mapSelectionResult?.feature_count ?? 0
+  const themeResults = useMemo(
+    () =>
+      themeInsights.flatMap((insight) => {
+        const theme = DATA_THEMES.find((candidate) => candidate.id === insight.themeId)
+        return theme ? [{ theme, dataset: insight.dataset, result: insight.result }] : []
+      }),
+    [themeInsights],
+  )
+  const activeSelectionResult = themeResults.find((item) => item.theme.id === activeThemeId)?.result ?? mapSelectionResult
+  const selectedAreaSquareMetres = useMemo(
+    () =>
+      bboxesEqual(mapSelectionBbox, selectedAreaBbox) && selectedMapArea?.area_m2
+        ? selectedMapArea.area_m2
+        : selectionAreaSquareMetres(mapSelectionBbox),
+    [mapSelectionBbox, selectedAreaBbox, selectedMapArea?.area_m2],
+  )
+  const selectedResultTotal = activeSelectionResult?.total_feature_count ?? activeSelectionResult?.feature_count ?? 0
   const selectedDensity = selectedAreaSquareMetres && selectedAreaSquareMetres > 0
     ? selectedResultTotal / (selectedAreaSquareMetres / 1_000_000)
     : null
   const selectedResultProperties = useMemo(() => {
     const keys = new Map<string, Set<string>>()
-    for (const feature of mapSelectionResult?.geojson.features ?? []) {
+    for (const feature of activeSelectionResult?.geojson.features ?? []) {
       for (const [key, value] of Object.entries(feature.properties ?? {})) {
         if (value === null || value === undefined || typeof value === 'object' || key.endsWith('_id')) {
           continue
@@ -492,26 +520,18 @@ export function MapWorkspace({
       .filter(([, values]) => values.size > 0)
       .slice(0, 8)
       .map(([key, values]) => ({ key, values: Array.from(values) }))
-  }, [mapSelectionResult])
-  const themeResults = useMemo(
-    () =>
-      themeInsights.flatMap((insight) => {
-        const theme = DATA_THEMES.find((candidate) => candidate.id === insight.themeId)
-        return theme ? [{ theme, dataset: insight.dataset, result: insight.result }] : []
-      }),
-    [themeInsights],
-  )
+  }, [activeSelectionResult])
 
   useEffect(() => {
     setBboxInput(bboxToInputState(mapSelectionBbox))
   }, [mapSelectionBbox])
 
   useEffect(() => {
-    if (selectedMapDatasetId || !themeDatasetMap.buildings) {
+    if (advancedMode || !activeThemeDataset || (selectedMapDataset && datasetMatchesTheme(selectedMapDataset, activeTheme))) {
       return
     }
-    onOpenDatasetInMap(themeDatasetMap.buildings)
-  }, [onOpenDatasetInMap, selectedMapDatasetId, themeDatasetMap.buildings])
+    onOpenDatasetInMap(activeThemeDataset)
+  }, [activeTheme, activeThemeDataset, advancedMode, onOpenDatasetInMap, selectedMapDataset])
 
   useEffect(() => {
     if (!selectedMapDataset) {
@@ -883,7 +903,7 @@ export function MapWorkspace({
                   </div>
                   <div>
                     <span>{activeTheme.shortLabel}</span>
-                    <strong>{mapSelectionResult ? resultCountLabel(mapSelectionResult) : 'Geen resultaat'}</strong>
+                    <strong>{activeSelectionResult ? resultCountLabel(activeSelectionResult) : 'Geen resultaat'}</strong>
                   </div>
                   <div>
                     <span>Dichtheid</span>
@@ -912,8 +932,8 @@ export function MapWorkspace({
                   })}
                 </div>
 
-                {mapSelectionResult?.truncated ? (
-                  <p className="geo-data-notice">De telling is volledig; op de kaart en in de tabel worden maximaal {mapSelectionResult.limit.toLocaleString('nl-BE')} objecten getoond.</p>
+                {activeSelectionResult?.truncated ? (
+                  <p className="geo-data-notice">De telling is volledig; op de kaart en in de tabel worden maximaal {activeSelectionResult.limit.toLocaleString('nl-BE')} objecten getoond.</p>
                 ) : null}
                 {mapSelectionError ? <p className="error">{mapSelectionError}</p> : null}
                 {themeResultsError ? <p className="error">{themeResultsError}</p> : null}