Polish QA metric evidence cards

frontend/src/styles/app.css

@@ -1304,6 +1304,64 @@ button.entity-card {
   white-space: nowrap;
 }
 
+.quality-metric-section {
+  margin-top: 0.75rem;
+}
+
+.metric-list-label,
+.quality-metric-section > span {
+  display: block;
+  color: var(--muted);
+  font-size: 0.72rem;
+  font-weight: 800;
+  letter-spacing: 0.05em;
+  text-transform: uppercase;
+}
+
+.quality-metric-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(7.5rem, 1fr));
+  gap: 0.5rem;
+  margin-top: 0.45rem;
+}
+
+.quality-metric-card {
+  min-width: 0;
+  border: 1px solid rgba(15, 118, 110, 0.18);
+  border-radius: 8px;
+  padding: 0.58rem;
+  background: #f8fbf9;
+}
+
+.quality-metric-card-critical {
+  border-color: rgba(185, 28, 28, 0.18);
+  background: #fff7ed;
+}
+
+.quality-metric-card span {
+  display: block;
+  color: var(--muted);
+  font-size: 0.7rem;
+  font-weight: 800;
+  letter-spacing: 0.04em;
+  text-transform: uppercase;
+}
+
+.quality-metric-card strong {
+  display: block;
+  margin-top: 0.24rem;
+  overflow: hidden;
+  color: var(--ink);
+  font-size: 1.08rem;
+  line-height: 1.15;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.metric-list-label {
+  margin-top: 0.82rem;
+}
+
 .metric-list {
   grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
   margin-top: 0.75rem;