feat(ui): add premium InsightAdvisorCard and InsightStatusCard components

New insight card components for the health advisor feature:
- InsightAdvisorCard: full structured display with primary recommendation,
  findings, correlations, recommendations, and collapsible data quality
- InsightStatusCard: compact per-metric status card with classification indicator
- Subtle fade-in animation for insight cards in globals.css

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/app/globals.css

@@ -166,3 +166,19 @@
     color: var(--foreground);
   }
 }
+
+/* ── Insight card animations ─────────────────────── */
+@keyframes insight-fade-in {
+  from {
+    opacity: 0;
+    transform: translateY(8px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+.animate-insight-in {
+  animation: insight-fade-in 0.4s ease-out forwards;
+}