Add governed source freshness audit

frontend/src/App.tsx

@@ -14,6 +14,7 @@ import { AreaPanel } from './components/project/AreaPanel'
 import { ProjectPanel } from './components/project/ProjectPanel'
 import { QualityResultsPanel } from './components/quality/QualityResultsPanel'
 import { WorkbenchStatusStrip } from './components/WorkbenchStatusStrip'
+import { SourceFreshnessPanel } from './components/status/SourceFreshnessPanel'
 import type { DatasetCreateResponse } from './types'
 import { ProviderPanel } from './components/providers/ProviderPanel'
 import { SegmentationLab } from './components/segmentation/SegmentationLab'
@@ -31,6 +32,7 @@ import { useProviderCapabilities } from './hooks/useProviderCapabilities'
 import { useProjectWorkspace } from './hooks/useProjectWorkspace'
 import { useQualityWorkflow } from './hooks/useQualityWorkflow'
 import { useSegmentationWorkflow } from './hooks/useSegmentationWorkflow'
+import { useSourceFreshness } from './hooks/useSourceFreshness'
 import { useWorkbenchBootstrap } from './hooks/useWorkbenchBootstrap'
 import { useViewportVectorLayer } from './hooks/useViewportVectorLayer'
 import { getDatasetDisplayName } from './lib/datasetDisplay'
@@ -92,6 +94,7 @@ function App(): JSX.Element {
     setProjectForm,
     setAreaForm,
   } = useProjectWorkspace()
+  const sourceFreshness = useSourceFreshness(selectedProjectId)
   const selectProject = (projectId: string) => {
     setMapContentMode('dataset')
     setSelectedProjectId(projectId)
@@ -852,6 +855,12 @@ function App(): JSX.Element {
                 activeLayerFeatureCount={mapFeatureCount}
                 selectedAreaHasGeometry={Boolean(areaFeatureCollection)}
               />
+              <SourceFreshnessPanel
+                report={sourceFreshness.report}
+                loading={sourceFreshness.loading}
+                error={sourceFreshness.error}
+                onRefresh={() => { void sourceFreshness.refresh() }}
+              />
               <details className="status-details-disclosure">
                 <summary>
                   <span>Volledige workflowstatus</span>