Polish QA metric evidence cards

backend/tests/test_sprint71_quality_metric_polish.py

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+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+
+
+def test_quality_panel_promotes_core_metrics_before_raw_metric_list() -> None:
+    quality_panel = (
+        ROOT / "frontend" / "src" / "components" / "quality" / "QualityResultsPanel.tsx"
+    ).read_text(encoding="utf-8")
+
+    assert "CORE_METRIC_ORDER" in quality_panel
+    assert "precision" in quality_panel
+    assert "recall" in quality_panel
+    assert "f1" in quality_panel
+    assert "mean_iou" in quality_panel
+    assert "false_positive_count" in quality_panel
+    assert "false_negative_count" in quality_panel
+    assert "qualityMetricValue" in quality_panel
+    assert "qualityMetricLabel" in quality_panel
+
+
+def test_quality_panel_renders_metric_evidence_cards_and_raw_metrics() -> None:
+    quality_panel = (
+        ROOT / "frontend" / "src" / "components" / "quality" / "QualityResultsPanel.tsx"
+    ).read_text(encoding="utf-8")
+
+    assert "quality-metric-grid" in quality_panel
+    assert "quality-metric-card" in quality_panel
+    assert "quality-metric-card-critical" in quality_panel
+    assert "Metric evidence" in quality_panel
+    assert "Raw metrics" in quality_panel
+    assert "check.metrics.map" in quality_panel
+
+
+def test_quality_metric_styles_are_dense_and_responsive() -> None:
+    css = (ROOT / "frontend" / "src" / "styles" / "app.css").read_text(encoding="utf-8")
+
+    assert ".quality-metric-grid" in css
+    assert "repeat(auto-fit, minmax(7.5rem, 1fr))" in css
+    assert ".quality-metric-card" in css
+    assert ".quality-metric-card-critical" in css
+    assert ".quality-metric-card strong" in css