fix: localize primary map delivery status

frontend/src/hooks/useViewportVectorLayer.ts

@@ -6,6 +6,7 @@ import {
   VECTOR_VIEWPORT_MIN_ZOOM,
 } from '../config/vectorDelivery'
 import { formatError } from '../lib/formatError'
+import { getDatasetDisplayName } from '../lib/datasetDisplay'
 import { datasetsApi } from '../services/api/datasets'
 import type { DatasetCreateResponse, MapViewportState } from '../types'
 
@@ -38,7 +39,7 @@ export function useViewportVectorLayer({
   )
   const zoom = viewport?.zoom ?? null
   const zoomRequired = enabled && (zoom === null || zoom < VECTOR_VIEWPORT_MIN_ZOOM)
-  const layerLabel = selectedDataset?.reference_layer_name?.trim() || 'features'
+  const layerLabel = selectedDataset ? getDatasetDisplayName(selectedDataset) : 'de kaartlaag'
 
   useEffect(() => {
     requestSequence.current += 1
@@ -86,7 +87,7 @@ export function useViewportVectorLayer({
         setData(null)
         setLoadedFeatureCount(0)
         setTruncated(false)
-        setError(formatError(requestError, 'Unable to load visible vector features'))
+        setError(formatError(requestError, 'De zichtbare kaartobjecten konden niet worden geladen'))
       } finally {
         if (requestSequence.current === sequence) {
           setLoading(false)
@@ -104,18 +105,18 @@ export function useViewportVectorLayer({
       return null
     }
     if (zoomRequired) {
-      return `Zoom in to level ${VECTOR_VIEWPORT_MIN_ZOOM} to load ${layerLabel} from PostGIS.`
+      return `Zoom verder in (tot niveau ${VECTOR_VIEWPORT_MIN_ZOOM}) om ${layerLabel} op de kaart te tonen.`
     }
     if (loading) {
-      return 'Loading visible features from PostGIS...'
+      return 'Zichtbare kaartobjecten laden...'
     }
     if (error) {
       return error
     }
     if (truncated) {
-      return `${loadedFeatureCount.toLocaleString()} visible features loaded; zoom in further because this view exceeds the ${VECTOR_VIEWPORT_FEATURE_LIMIT.toLocaleString()} feature limit.`
+      return `${loadedFeatureCount.toLocaleString('nl-BE')} kaartobjecten getoond. Zoom verder in om meer detail te zien.`
     }
-    return `${loadedFeatureCount.toLocaleString()} visible of ${(featureCount ?? 0).toLocaleString()} total features loaded from PostGIS.`
+    return `${loadedFeatureCount.toLocaleString('nl-BE')} van ${(featureCount ?? 0).toLocaleString('nl-BE')} kaartobjecten zichtbaar.`
   }, [enabled, error, featureCount, layerLabel, loadedFeatureCount, loading, truncated, zoomRequired])
 
   return {