Add visual polish and micro-interactions for editorial feel

Phase 1 - Critical Fixes:
- EmptyState: warm palette, coral button, Playfair Display title
- Pagination: design system colors, coral active state
- LoadingSkeleton: warm shimmer with coral tint

Phase 2 - Signature Patterns:
- Navigation: sliding underline hover effect on links
- globals.css: increased noise texture opacity for paper feel
- RankingsView: alternating row backgrounds
- HomeView: decorative coral bar under section headings

Phase 3 - Polish:
- SchoolCard: SVG trend icons replacing unicode arrows
- RankingsView: styled metallic rank badges replacing emoji medals

Phase 4 - Micro-interactions:
- Navigation badge: pop animation when count changes
- HomeView grid: staggered entry animation for cards

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

nextjs-app/components/Navigation.module.css

@@ -63,16 +63,39 @@
   transition: all 0.2s ease;
 }
 
+/* Sliding underline effect */
+.navLink::after {
+  content: '';
+  position: absolute;
+  bottom: 4px;
+  left: 1rem;
+  right: 1rem;
+  height: 2px;
+  background: var(--accent-coral, #e07256);
+  transform: scaleX(0);
+  transform-origin: left;
+  transition: transform 0.25s ease;
+  border-radius: 1px;
+}
+
 .navLink:hover {
   color: var(--text-primary, #1a1612);
   background: var(--bg-secondary, #f3ede4);
 }
 
+.navLink:hover::after {
+  transform: scaleX(1);
+}
+
 .navLink.active {
   color: var(--accent-coral, #e07256);
   background: rgba(224, 114, 86, 0.1);
 }
 
+.navLink.active::after {
+  transform: scaleX(1);
+}
+
 .badge {
   display: inline-flex;
   align-items: center;
@@ -85,6 +108,22 @@
   color: white;
   background: var(--accent-coral, #e07256);
   border-radius: 9999px;
+  animation: badgePop 0.3s ease-out;
+  box-shadow: 0 2px 6px rgba(224, 114, 86, 0.4);
+}
+
+@keyframes badgePop {
+  0% {
+    transform: scale(0.6);
+    opacity: 0;
+  }
+  50% {
+    transform: scale(1.2);
+  }
+  100% {
+    transform: scale(1);
+    opacity: 1;
+  }
 }
 
 @media (max-width: 640px) {