feat: team spotlight carousel with drag, auto-rotate, and progress dots

- Spotlight stage effect with center card lit up, side cards dimmed
- Continuous drag navigation with pointer events
- Auto-rotation every 4.5s, pauses on interaction
- Interpolated card positions (size, opacity, brightness, grayscale)
- Progress dots navigation
- Fix About stats: 13 → 16 trainers

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/app/styles/animations.css

@@ -270,6 +270,19 @@
   animation: modal-fade-in 0.4s cubic-bezier(0.16, 1, 0.3, 1);
 }
 
+/* ===== Team Info Fade ===== */
+
+@keyframes team-info-in {
+  from {
+    opacity: 0;
+    transform: translateY(8px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
 /* ===== Section Divider ===== */
 
 .section-divider {