feat: glitter border on team/class cards, mobile-friendly class selector

- Animated gold border glitter effect on active team card and class image
- Classes selector: 2-column grid on mobile (no scroll), list on desktop
- Selector appears above detail on mobile (flex-col-reverse)
- Compact selector items on mobile (icon + name only)

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

src/components/sections/Team.tsx

@@ -213,7 +213,7 @@ export function Team() {
                 return (
                   <div
                     key={m.name}
-                    className="absolute bottom-0 overflow-hidden rounded-2xl border pointer-events-none"
+                    className={`absolute bottom-0 overflow-hidden rounded-2xl border pointer-events-none ${style.isCenter ? "team-card-glitter" : ""}`}
                     style={{
                       width: style.width,
                       height: style.height,
@@ -221,8 +221,10 @@ export function Team() {
                       zIndex: style.zIndex,
                       transform: style.transform,
                       filter: style.filter,
-                      borderColor: style.borderColor,
-                      boxShadow: style.boxShadow,
+                      borderColor: style.isCenter ? "transparent" : style.borderColor,
+                      boxShadow: style.isCenter
+                        ? "0 0 40px rgba(201,169,110,0.15), 0 0 80px rgba(201,169,110,0.08)"
+                        : style.boxShadow,
                       transition: style.transition,
                     }}
                   >