style(wizard): unify and minimize top spacing across steps 1-4

shop/components/wizard/summary-sidebar.tsx

@@ -84,7 +84,7 @@ export function SummarySidebar({
   return (
     <Card className="glass-dark border-white/10 shadow-2xl rounded-2xl overflow-hidden flex flex-col h-full bg-slate-900/90 backdrop-blur-xl">
       {/* ─── 1. TOP HEADER (shrink-0) ─── */}
-      <CardHeader className="shrink-0 pb-3 pt-4 px-4 border-b border-white/10 bg-slate-950/60">
+      <CardHeader className="shrink-0 py-2.5 px-4 border-b border-white/10 bg-slate-950/60">
         <div className="flex items-center justify-between gap-2">
           <CardTitle className="text-white text-sm font-bold flex items-center gap-2">
             <ShoppingCart className="w-4 h-4 text-primary" />