perf: improve sidebar navigation responsiveness

apps/web/app/(pages)/loading.tsx

@@ -0,0 +1,49 @@
+import { Card } from "@/components/shared/card";
+
+export default function PagesLoading() {
+  return (
+    <div className="space-y-6">
+      <Card className="overflow-hidden rounded-[24px] p-0">
+        <div className="animate-pulse space-y-4 px-6 py-7 lg:px-8 lg:py-8">
+          <div className="h-4 w-28 rounded-full bg-[rgba(255,255,255,0.08)]" />
+          <div className="h-12 max-w-3xl rounded-[18px] bg-[rgba(255,255,255,0.08)]" />
+          <div className="h-5 max-w-2xl rounded-full bg-[rgba(255,255,255,0.06)]" />
+          <div className="flex flex-wrap gap-3">
+            <div className="h-9 w-28 rounded-[18px] bg-[rgba(255,255,255,0.06)]" />
+            <div className="h-9 w-24 rounded-[18px] bg-[rgba(255,255,255,0.06)]" />
+            <div className="h-9 w-32 rounded-[18px] bg-[rgba(255,255,255,0.06)]" />
+          </div>
+        </div>
+      </Card>
+
+      <div className="grid gap-4 md:grid-cols-2 xl:grid-cols-4">
+        {Array.from({ length: 4 }).map((_, index) => (
+          <Card
+            key={index}
+            className="animate-pulse rounded-[20px] bg-[color:var(--bg-muted)] p-5"
+          >
+            <div className="h-4 w-24 rounded-full bg-[rgba(255,255,255,0.08)]" />
+            <div className="mt-4 h-8 w-20 rounded-[14px] bg-[rgba(255,255,255,0.12)]" />
+            <div className="mt-4 h-4 w-36 rounded-full bg-[rgba(255,255,255,0.06)]" />
+          </Card>
+        ))}
+      </div>
+
+      <div className="grid gap-6 xl:grid-cols-2">
+        {Array.from({ length: 2 }).map((_, index) => (
+          <Card
+            key={index}
+            className="animate-pulse rounded-[24px] bg-[color:var(--bg-muted)] p-5"
+          >
+            <div className="h-4 w-28 rounded-full bg-[rgba(255,255,255,0.08)]" />
+            <div className="mt-4 space-y-3">
+              <div className="h-16 rounded-[18px] bg-[rgba(255,255,255,0.06)]" />
+              <div className="h-16 rounded-[18px] bg-[rgba(255,255,255,0.06)]" />
+              <div className="h-16 rounded-[18px] bg-[rgba(255,255,255,0.06)]" />
+            </div>
+          </Card>
+        ))}
+      </div>
+    </div>
+  );
+}

apps/web/components/layout/app-shell.tsx

@@ -1,6 +1,7 @@
 import Link from "next/link";
 import { Activity, Database, Gauge, LayoutGrid, ShieldAlert, Sparkles } from "lucide-react";
 import { cn } from "@/components/shared/cn";
+import { RoutePrefetch } from "@/components/layout/route-prefetch";
 
 const navItems = [
   { href: "/dashboard", label: "대시보드", icon: LayoutGrid },
@@ -14,6 +15,7 @@ const navItems = [
 export function AppShell({ children }: { children: React.ReactNode }) {
   return (
     <div className="page-shell">
+      <RoutePrefetch />
       <div className="mx-auto grid min-h-[calc(100vh-28px)] max-w-[1480px] gap-4 xl:grid-cols-[280px_minmax(0,1fr)]">
         <aside className="glass gold-shadow flex flex-col justify-between rounded-[24px] border border-[color:var(--border)] px-5 py-5">
           <div className="space-y-8">
@@ -44,6 +46,7 @@ export function AppShell({ children }: { children: React.ReactNode }) {
                   <Link
                     key={item.href}
                     href={item.href}
+                    prefetch
                     className={cn(
                       "ui-pill flex items-center gap-3 px-4 py-3 text-[14px] font-medium transition",
                       "bg-[rgba(255,255,255,0.02)] text-[color:var(--text-muted)] hover:bg-[rgba(255,255,255,0.06)] hover:text-white"

apps/web/components/layout/route-prefetch.tsx

@@ -0,0 +1,25 @@
+"use client";
+
+import { useEffect } from "react";
+import { useRouter } from "next/navigation";
+
+const ROUTES_TO_PREFETCH = [
+  "/dashboard",
+  "/events",
+  "/themes",
+  "/replay",
+  "/evaluation",
+  "/admin"
+];
+
+export function RoutePrefetch() {
+  const router = useRouter();
+
+  useEffect(() => {
+    ROUTES_TO_PREFETCH.forEach((route) => {
+      router.prefetch(route);
+    });
+  }, [router]);
+
+  return null;
+}