feat(music): /music 허브 신설 — 3 카드 (팩 상세 / 샘플 / 스튜디오)

Music 사업부 진입점. /music/{packs,samples,studio} 으로 분기.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/music/layout.tsx

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+import type { Metadata } from 'next';
+
+export const metadata: Metadata = {
+  title: 'AI 음악 제품',
+  description: 'Suno 프롬프트 + 뮤직비디오 워크플로우 + 유튜브 SEO 템플릿 한 팩에. 1시간 만에 음악·뮤비 완성.',
+};
+
+export default function MusicLayout({ children }: { children: React.ReactNode }) {
+  return <>{children}</>;
+}

app/music/page.tsx

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+import Link from 'next/link';
+import type { Metadata } from 'next';
+
+export const metadata: Metadata = {
+  title: 'Music — AI 음악 제품',
+};
+
+const CARDS = [
+  {
+    href: '/music/packs',
+    label: '팩 상세',
+    desc: '입문 ₩39,000부터 — Suno 프롬프트북 + 뮤비 워크플로우 + SEO 템플릿',
+    key: 'packs',
+  },
+  {
+    href: '/music/samples',
+    label: '샘플 갤러리',
+    desc: '실제 결과물 — 장르별 데모 + 가사 + 영상 미리보기',
+    key: 'samples',
+  },
+  {
+    href: '/music/studio',
+    label: 'AI 스튜디오',
+    desc: 'Suno API 연동 — 직접 트랙 생성 (베타)',
+    key: 'studio',
+  },
+];
+
+export default function MusicHub() {
+  return (
+    <div className="min-h-screen bg-black text-white">
+      <section className="relative w-full min-h-[60vh] flex items-center justify-center px-6 border-b border-white/10">
+        <div className="absolute inset-0 bg-gradient-to-b from-[#060e20] to-black pointer-events-none" />
+        <div className="relative z-10 max-w-3xl mx-auto text-center">
+          <p className="font-mono text-[11px] tracking-widest uppercase text-white/50 mb-4">
+            Music
+          </p>
+          <h1
+            className="kx-display text-4xl md:text-6xl font-bold mb-5"
+            style={{ wordBreak: 'keep-all', letterSpacing: '-0.02em' }}
+          >
+            AI 음악 제품
+          </h1>
+          <p className="text-base md:text-lg text-white/70 max-w-2xl mx-auto leading-relaxed">
+            Suno 프롬프트 + 뮤직비디오 워크플로우 + 유튜브 SEO 템플릿. 한 팩에 담긴 4단계 워크플로우로 1시간 안에 결과물 완성.
+          </p>
+        </div>
+      </section>
+
+      <section className="py-20 px-6">
+        <div className="max-w-6xl mx-auto grid grid-cols-1 md:grid-cols-3 gap-5">
+          {CARDS.map((c) => (
+            <Link
+              key={c.key}
+              href={c.href}
+              className="group rounded-2xl border border-white/15 bg-white/[0.02] p-7 hover:border-white/40 hover:bg-white/[0.05] transition flex flex-col"
+              style={{ textDecoration: 'none' }}
+            >
+              <h2 className="kx-display text-xl md:text-2xl font-bold text-white mb-3">
+                {c.label}
+              </h2>
+              <p className="text-sm md:text-base text-white/60 leading-relaxed flex-1">
+                {c.desc}
+              </p>
+              <span aria-hidden="true" className="mt-4 text-white/40 text-xs">→</span>
+            </Link>
+          ))}
+        </div>
+      </section>
+    </div>
+  );
+}