feat: add governed Mol nature value layer

frontend/src/components/datasets/SourceCatalogPanel.tsx

@@ -8,6 +8,7 @@ const THEME_LABELS: Record<string, string> = {
   buildings: 'Bebouwing',
   population: 'Bevolking',
   forest: 'Bos',
+  nature_value: 'Natuurwaarde',
   water: 'Water',
   roads: 'Wegen en transport',
   parcels: 'Percelen',
@@ -103,9 +104,11 @@ export function SourceCatalogPanel({ datasets }: SourceCatalogPanelProps): JSX.E
       dataset.source_name === 'digitaal_vlaanderen_orthophoto' &&
       String(dataset.source_metadata?.['product_key'] ?? 'most_recent') !== 'most_recent',
   )
+  const bwkDatasets = ready.filter((dataset) => dataset.source_name === 'inbo_bwk_natura2000')
   const pendingSources = AVAILABLE_SOURCES.filter((source) => {
     if (source.key === 'waterinfo') return waterinfoDatasets.length === 0
     if (source.key === 'historical_orthophoto') return historicalOrthophotos.length === 0
+    if (source.key === 'bwk') return bwkDatasets.length === 0
     return true
   })
   const themes = Object.keys(THEME_LABELS).map((theme) => {
@@ -165,7 +168,7 @@ export function SourceCatalogPanel({ datasets }: SourceCatalogPanelProps): JSX.E
         ))}
       </div>
 
-      {waterinfoDatasets.length > 0 || historicalOrthophotos.length > 0 ? (
+      {waterinfoDatasets.length > 0 || historicalOrthophotos.length > 0 || bwkDatasets.length > 0 ? (
         <div className="source-catalog-loaded" aria-label="Aanvullende ingeladen bronnen">
           {waterinfoDatasets.length > 0 ? (
             <article>
@@ -181,6 +184,13 @@ export function SourceCatalogPanel({ datasets }: SourceCatalogPanelProps): JSX.E
               <p>Officiële jaargangen en periodes zijn via de kaart beschikbaar zonder actuele GRB-validatie.</p>
             </article>
           ) : null}
+          {bwkDatasets.length > 0 ? (
+            <article>
+              <strong>BWK / Natura 2000</strong>
+              <span>Toestand 2025 · {bwkDatasets.reduce((total, dataset) => total + (dataset.feature_count ?? 0), 0).toLocaleString('nl-BE')} kaartvlakken</span>
+              <p>Biologische waardering en habitataandelen blijven afzonderlijke, brongetrouwe metingen met herkomstinformatie.</p>
+            </article>
+          ) : null}
         </div>
       ) : null}