Add demo raster fixture workflow

frontend/README.md

@@ -260,6 +260,7 @@ AI Lab run controls explicitly explain when no raster dataset is available, inst
 - The Data workspace surfaces selected project, AOI and dataset context before creation/upload forms, then separates form and catalog/list regions for faster scanning.
 - The Export Center includes a handoff readiness summary, grouped artifact actions and provenance-rich export cards so report/GeoJSON handoff stays understandable in long-running demo projects.
 - The Export Center highlights the latest project report, project metadata, dataset GeoJSON, detection GeoJSON and segmentation GeoJSON artifacts with direct preview/download actions.
+- The offline demo workflow now selects the seeded raster fixture for Detection and Segmentation Lab prerequisites while keeping the candidate vector dataset open for Data/Map/Export review.
 
 ## Workbench shell refactor
 

frontend/src/App.tsx

@@ -363,7 +363,9 @@ function App(): JSX.Element {
     setQaCandidateDatasetId,
     setQaReferenceDatasetId,
     setQaAreaId,
+    setSelectedDetectionDatasetId,
     setDetectionReferenceDatasetId,
+    setSelectedSegmentationDatasetId,
     setSegmentationReferenceDatasetId,
     setErrorMessage,
   })

frontend/src/hooks/useDemoWorkflow.ts

@@ -17,7 +17,9 @@ interface DemoWorkflowOptions {
   setQaCandidateDatasetId: (datasetId: string) => void
   setQaReferenceDatasetId: (datasetId: string) => void
   setQaAreaId: (areaId: string) => void
+  setSelectedDetectionDatasetId: (datasetId: string) => void
   setDetectionReferenceDatasetId: (datasetId: string) => void
+  setSelectedSegmentationDatasetId: (datasetId: string) => void
   setSegmentationReferenceDatasetId: (datasetId: string) => void
   setErrorMessage: (message: string | null) => void
 }
@@ -36,7 +38,9 @@ export function useDemoWorkflow({
   setQaCandidateDatasetId,
   setQaReferenceDatasetId,
   setQaAreaId,
+  setSelectedDetectionDatasetId,
   setDetectionReferenceDatasetId,
+  setSelectedSegmentationDatasetId,
   setSegmentationReferenceDatasetId,
   setErrorMessage,
 }: DemoWorkflowOptions) {
@@ -55,7 +59,9 @@ export function useDemoWorkflow({
       setQaCandidateDatasetId(result.candidate_dataset_id)
       setQaReferenceDatasetId(result.reference_dataset_id)
       setQaAreaId(result.area_id)
+      setSelectedDetectionDatasetId(result.raster_dataset_id ?? '')
       setDetectionReferenceDatasetId(result.reference_dataset_id)
+      setSelectedSegmentationDatasetId(result.raster_dataset_id ?? '')
       setSegmentationReferenceDatasetId(result.reference_dataset_id)
       setDemoWorkflowMessage(result.message)
       await loadProjects(result.project_id)
@@ -67,8 +73,11 @@ export function useDemoWorkflow({
         loadExports(result.project_id),
       ])
       const candidateDataset = projectData?.datasets.find((dataset) => dataset.id === result.candidate_dataset_id)
+      const rasterDataset = projectData?.datasets.find((dataset) => dataset.id === result.raster_dataset_id)
       if (candidateDataset) {
         await loadDatasetDetails(result.project_id, candidateDataset)
+      } else if (rasterDataset) {
+        await loadDatasetDetails(result.project_id, rasterDataset)
       }
     } catch (error) {
       setErrorMessage(formatError(error, 'Failed to load demo workflow'))

frontend/src/types.ts

@@ -40,6 +40,7 @@ export interface DemoWorkflowResponse {
   area_id: string
   reference_dataset_id: string
   candidate_dataset_id: string
+  raster_dataset_id?: string | null
   quality_check_id: string
   metric_count: number
   status: string