Add QA evidence drilldown

backend/tests/test_sprint94_quality_drilldown.py

@@ -0,0 +1,48 @@
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+
+
+def test_quality_results_panel_exposes_selected_check_drilldown() -> None:
+    panel = (ROOT / "frontend" / "src" / "components" / "quality" / "QualityResultsPanel.tsx").read_text(
+        encoding="utf-8"
+    )
+
+    assert "selectedQualityCheckId" in panel
+    assert "selectedQualityCheck" in panel
+    assert "QA/QC evidence drilldown" in panel
+    assert "Selected check" in panel
+    assert "Candidate layer" in panel
+    assert "Reference layer" in panel
+    assert "Analysis run" in panel
+    assert "Job" in panel
+    assert "Completed" in panel
+    assert "Inspect latest check" in panel
+    assert "Inspect check" in panel
+
+
+def test_quality_results_panel_surfaces_false_positive_negative_evidence() -> None:
+    panel = (ROOT / "frontend" / "src" / "components" / "quality" / "QualityResultsPanel.tsx").read_text(
+        encoding="utf-8"
+    )
+
+    assert "False positive evidence" in panel
+    assert "False negative evidence" in panel
+    assert "Map evidence handoff" in panel
+    assert "metricByKey(selectedQualityCheck, 'false_positive_count')" in panel
+    assert "metricByKey(selectedQualityCheck, 'false_negative_count')" in panel
+    assert "selectedQualityCheck.parameters_json" in panel
+    assert "selectedQualityCheck.findings_json" in panel
+    assert "JSON.stringify" in panel
+
+
+def test_quality_drilldown_styles_are_responsive() -> None:
+    css = (ROOT / "frontend" / "src" / "styles" / "app.css").read_text(encoding="utf-8")
+
+    assert ".quality-drilldown-surface" in css
+    assert ".quality-drilldown-grid" in css
+    assert ".quality-evidence-token-grid" in css
+    assert ".quality-evidence-map-handoff" in css
+    assert ".quality-provenance-pre" in css
+    assert "grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));" in css