Polish export handoff artifacts

backend/tests/test_sprint93_export_handoff_completion.py

@@ -0,0 +1,45 @@
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+
+
+def test_export_center_groups_latest_handoff_artifacts_by_type() -> None:
+    export_center = (ROOT / "frontend" / "src" / "components" / "exports" / "ExportCenter.tsx").read_text(
+        encoding="utf-8"
+    )
+
+    assert "latestHandoffArtifacts" in export_center
+    assert "Latest handoff artifacts" in export_center
+    assert "Project report" in export_center
+    assert "Project metadata" in export_center
+    assert "Dataset GeoJSON" in export_center
+    assert "Detection GeoJSON" in export_center
+    assert "Segmentation GeoJSON" in export_center
+    assert "latest-artifact-grid" in export_center
+    assert "latest-artifact-card" in export_center
+    assert "No artifact yet" in export_center
+
+
+def test_export_center_latest_artifact_cards_keep_existing_actions() -> None:
+    export_center = (ROOT / "frontend" / "src" / "components" / "exports" / "ExportCenter.tsx").read_text(
+        encoding="utf-8"
+    )
+
+    assert "getLatestExportByType" in export_center
+    assert "const item = artifact.item" in export_center
+    assert "canPreviewJson(item)" in export_center
+    assert "onPreviewContent(item.id)" in export_center
+    assert "onDownload(item.id)" in export_center
+    assert "compactPath(item.storage_path)" in export_center
+    assert "formatExportCreated(item.created_at)" in export_center
+
+
+def test_export_center_latest_artifact_styles_are_responsive() -> None:
+    css = (ROOT / "frontend" / "src" / "styles" / "app.css").read_text(encoding="utf-8")
+
+    assert ".latest-artifact-grid" in css
+    assert ".latest-artifact-card" in css
+    assert ".latest-artifact-card-empty" in css
+    assert ".latest-artifact-actions" in css
+    assert "grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));" in css