Polish populated workbench states

CHANGELOG.md

@@ -604,3 +604,13 @@ Added:
 - Preserved existing dataset detail loading, map layer state, export actions and API client behavior.
 - Added regression coverage for dataset quick actions and inspector navigation wiring.
 - No API contracts, migrations, product capabilities, live provider fetching or AI/model dependency changes were introduced.
+
+## Sprint 54 populated-state UI polish (2026-06-17)
+
+- Ran the live demo/export workflow against Tower and audited populated Data and Exports states.
+- Changed the Data workspace to keep Project and AOI side by side while giving the Dataset catalog a full-width row.
+- Compacted the Exports history to show the latest 10 artifacts by default with an explicit show-all toggle.
+- Kept a visible Export Preview panel even before preview content is selected.
+- Shortened displayed export paths while preserving the full path in the element title.
+- Added regression coverage for populated-state Data layout, export limiting and export preview empty state.
+- No API contracts, migrations, product capabilities, live provider fetching or AI/model dependency changes were introduced.

backend/tests/test_sprint51_quality_export_polish.py

@@ -31,8 +31,11 @@ def test_export_center_uses_artifact_actions_and_cards() -> None:
     assert 'className="latest-export-card"' in export_center
     assert 'className="export-list"' in export_center
     assert 'className="export-card"' in export_center
+    assert "visibleExports = showAllExports ? exports : exports.slice(0, 10)" in export_center
+    assert "Show all exports" in export_center
     assert "onExportDataset" in export_center
     assert "onExportDetectionRun" in export_center
     assert "onExportSegmentationRun" in export_center
     assert "download-only HTML artifact" in export_center
     assert 'className="export-preview-panel"' in export_preview
+    assert "No export preview selected." in export_preview

backend/tests/test_sprint53_selection_ergonomics.py

@@ -18,6 +18,15 @@ def test_dataset_panel_exposes_map_and_export_quick_actions() -> None:
     assert "disabled={!(dataset.dataset_type === 'vector' || dataset.dataset_type === 'geojson')}" in panel
 
 
+def test_data_workspace_keeps_catalog_wide_enough_for_populated_state() -> None:
+    css = (ROOT / "frontend" / "src" / "styles" / "app.css").read_text(encoding="utf-8")
+
+    assert ".workspace-grid-data {\n  grid-template-columns: repeat(2, minmax(0, 1fr));\n}" in css
+    assert ".workspace-grid-data > section:nth-child(3)" in css
+    assert "grid-column: 1 / -1" in css
+    assert ".dataset-card .button-row" in css
+
+
 def test_app_wires_dataset_quick_actions_to_existing_workspaces() -> None:
     app = (ROOT / "frontend" / "src" / "App.tsx").read_text(encoding="utf-8")
 

docs/CODEX_EXECUTION_LOG.md

@@ -2175,3 +2175,27 @@ Limitations:
 
 Next recommended pass:
 - Verify dataset quick actions with demo data on Tower, then improve populated map/detail readability if needed.
+
+## Sprint 54 populated-state UI polish (2026-06-17)
+
+Changed:
+- Ran the live demo/export workflow against the Tower deployment to inspect real populated workbench states.
+- Adjusted the Data workspace so Project and AOI remain side by side while the Dataset catalog spans the full row for readable populated dataset cards.
+- Made dataset-card action rows responsive so Map/Exports/detail actions do not crowd or clip on populated cards.
+- Limited the Exports artifact history to the latest 10 entries by default with an explicit show-all toggle.
+- Kept the Export Preview panel visible even before an artifact is selected, avoiding a blank middle column in the Exports workspace.
+- Shortened displayed export storage paths while keeping the full path available in the title attribute.
+- Added regression coverage for the populated Data layout and Exports populated-state behavior.
+
+Tested:
+- `bash scripts/verify_demo_export_workflow.sh http://192.168.10.150:1202`
+- Local Vite visual audit using the live Tower API proxy on `http://127.0.0.1:5176`
+
+Open:
+- Run full readiness, deploy Tower, then verify the polished populated states on `http://192.168.10.150:1202`.
+
+Limitations:
+- This pass remains UI polish only. It does not add features, change API contracts, alter migrations, fetch live providers or enable new AI models.
+
+Next recommended pass:
+- Add export history filtering or retention controls if artifact history continues to grow during demo runs.

docs/TODO.md

@@ -323,4 +323,5 @@ This file now starts with the current implementation status. Older preparation/b
 - [x] Polish QA/QC and Exports workspaces.
 - [x] Add selected-object inspector detail tabs for project, AOI, dataset, QA check, export and AI run context.
 - [x] Improve map/dataset selection ergonomics from the workbench canvas and inspector.
-- [ ] Improve populated map/detail readability after a demo workflow run.
+- [x] Improve populated Data/Exports readability after a demo workflow run.
+- [ ] Add export history filtering or retention controls for long-running demo environments.

frontend/src/components/exports/ExportCenter.tsx

@@ -1,3 +1,4 @@
+import { useState } from 'react'
 import type { DatasetCreateResponse, ExportCreateResponse, ExportRead } from '../../types'
 
 interface ExportCenterProps {
@@ -34,6 +35,14 @@ function canPreviewJson(item: ExportRead): boolean {
   return true
 }
 
+function compactPath(value: string): string {
+  const parts = value.split('/').filter(Boolean)
+  if (parts.length <= 2) {
+    return value
+  }
+  return parts.slice(-2).join('/')
+}
+
 export function ExportCenter({
   selectedProjectId,
   selectedDataset,
@@ -53,9 +62,12 @@ export function ExportCenter({
   onPreviewContent,
   onDownload,
 }: ExportCenterProps): JSX.Element {
+  const [showAllExports, setShowAllExports] = useState(false)
   const canExportDataset = Boolean(selectedDataset && isVectorDatasetType(selectedDataset.dataset_type))
   const geojsonExports = exports.filter((item) => item.export_type.includes('geojson')).length
   const reportExports = exports.filter((item) => item.export_type === 'project_report_html').length
+  const visibleExports = showAllExports ? exports : exports.slice(0, 10)
+  const hiddenExportCount = Math.max(exports.length - visibleExports.length, 0)
 
   return (
     <section className="export-center" data-testid="export-center">
@@ -126,8 +138,18 @@ export function ExportCenter({
           <p>Create metadata, GeoJSON or HTML report artifacts once the active project has data to hand off.</p>
         </div>
       ) : null}
+      {exports.length > 10 ? (
+        <div className="list-limit-banner">
+          <span>
+            Showing {visibleExports.length} latest exports. {hiddenExportCount > 0 ? `${hiddenExportCount} older artifacts hidden.` : 'All artifacts shown.'}
+          </span>
+          <button type="button" className="secondary-action" onClick={() => setShowAllExports((value) => !value)}>
+            {showAllExports ? 'Show latest 10' : 'Show all exports'}
+          </button>
+        </div>
+      ) : null}
       <ul className="export-list">
-        {exports.map((item) => (
+        {visibleExports.map((item) => (
           <li className="export-card" key={item.id}>
             <div className="export-card-header">
               <div>
@@ -138,7 +160,7 @@ export function ExportCenter({
               </div>
               <span className={item.status === 'ready' ? 'status-badge status-badge-ready' : 'status-badge'}>{item.status}</span>
             </div>
-            <p>{item.storage_path}</p>
+            <p title={item.storage_path}>{compactPath(item.storage_path)}</p>
             <div className="button-row">
               {canPreviewJson(item) ? (
                 <button type="button" className="secondary-action" onClick={() => onPreviewContent(item.id)}>

frontend/src/components/exports/ExportPreview.tsx

@@ -2,11 +2,7 @@ interface ExportPreviewProps {
   content: Record<string, unknown> | null
 }
 
-export function ExportPreview({ content }: ExportPreviewProps): JSX.Element | null {
+export function ExportPreview({ content }: ExportPreviewProps): JSX.Element {
-  if (!content) {
-    return null
-  }
-
   return (
     <section className="export-preview-panel">
       <div className="panel-title-row">
@@ -16,7 +12,14 @@ export function ExportPreview({ content }: ExportPreviewProps): JSX.Element | nu
         </div>
         <span className="count-pill">preview</span>
       </div>
-      <pre className="job-result">{JSON.stringify(content, null, 2)}</pre>
+      {content ? (
+        <pre className="job-result">{JSON.stringify(content, null, 2)}</pre>
+      ) : (
+        <div className="empty-state">
+          <strong>No export preview selected.</strong>
+          <p>Use Preview JSON content on a JSON or GeoJSON artifact to inspect the stored payload here.</p>
+        </div>
+      )}
     </section>
   )
 }

frontend/src/styles/app.css

@@ -679,7 +679,7 @@ section li strong + div {
 }
 
 .workspace-grid-data {
-  grid-template-columns: minmax(16rem, 0.75fr) minmax(18rem, 0.95fr) minmax(22rem, 1.35fr);
+  grid-template-columns: repeat(2, minmax(0, 1fr));
 }
 
 .workspace-grid-analysis,
@@ -701,6 +701,10 @@ section li strong + div {
   overflow: visible;
 }
 
+.workspace-grid-data > section:nth-child(3) {
+  grid-column: 1 / -1;
+}
+
 .workspace-grid-ai > section {
   align-self: stretch;
 }
@@ -943,6 +947,16 @@ button.entity-card {
   margin-top: 0.7rem;
 }
 
+.dataset-card .button-row {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
+}
+
+.dataset-card .button-row button {
+  width: 100%;
+  margin-top: 0;
+}
+
 .button-row {
   display: flex;
   flex-wrap: wrap;
@@ -1068,6 +1082,29 @@ button.entity-card {
   background: var(--accent-soft);
 }
 
+.list-limit-banner {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto;
+  gap: 0.7rem;
+  align-items: center;
+  margin-top: 0.8rem;
+  border: 1px solid var(--line);
+  border-radius: 8px;
+  padding: 0.62rem 0.72rem;
+  background: #ffffff;
+}
+
+.list-limit-banner span {
+  color: var(--muted);
+  font-size: 0.86rem;
+  line-height: 1.35;
+}
+
+.list-limit-banner button {
+  width: auto;
+  min-height: 2.15rem;
+}
+
 .export-list {
   margin-top: 0.8rem;
 }
@@ -1311,7 +1348,8 @@ button.entity-card {
   .quality-summary-grid,
   .quality-score-row,
   .export-action-grid,
-  .inspector-action-bar {
+  .inspector-action-bar,
+  .list-limit-banner {
     grid-template-columns: 1fr;
   }