feat(routing): next.config.ts redirects() 10개 추가

P1 IA 마이그레이션 — 기존 URL → 새 URL 영구 리다이렉트 (permanent: true):
- /services/music → /music/packs
- /services/music/samples → /music/samples
- /studio → /music/studio
- /freelance → /work/freelance
- /services/website → /work/website
- /services/website/samples/:slug → /work/website/samples/:slug
- /services/blog → /work/blog
- /saju → /work/saju
- /saju/input → /work/saju/input
- /saju/result → /work/saju/result

이 시점에 destination 페이지 아직 없음 (Phase B에서 생성). 단, redirect 자체는 빌드 OK.

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

next.config.ts

@@ -6,37 +6,46 @@ const nextConfig: NextConfig = {
       {
         source: "/:path*",
         headers: [
-          // 클릭재킹 방지
           { key: "X-Frame-Options", value: "DENY" },
-          // MIME 스니핑 방지
           { key: "X-Content-Type-Options", value: "nosniff" },
-          // Referrer 정책
           { key: "Referrer-Policy", value: "strict-origin-when-cross-origin" },
-          // XSS 필터 (레거시 브라우저)
           { key: "X-XSS-Protection", value: "1; mode=block" },
-          // HTTPS 강제 (Vercel은 자동 HTTPS이므로 안전)
           {
             key: "Strict-Transport-Security",
             value: "max-age=63072000; includeSubDomains; preload",
           },
-          // 권한 정책
           {
             key: "Permissions-Policy",
             value: "camera=(), microphone=(), geolocation=()",
           },
         ],
       },
-      // API 엔드포인트: 캐시 금지 + CORS 차단
       {
         source: "/api/:path*",
         headers: [
           { key: "Cache-Control", value: "no-store, max-age=0" },
-          // 동일 출처 요청만 허용 (외부 도메인 API 직접 호출 차단)
           { key: "X-Frame-Options", value: "DENY" },
         ],
       },
     ];
   },
+  async redirects() {
+    return [
+      // Music 사업부 마이그
+      { source: '/services/music', destination: '/music/packs', permanent: true },
+      { source: '/services/music/samples', destination: '/music/samples', permanent: true },
+      { source: '/studio', destination: '/music/studio', permanent: true },
+      // Custom Build 사업부 마이그
+      { source: '/freelance', destination: '/work/freelance', permanent: true },
+      { source: '/services/website', destination: '/work/website', permanent: true },
+      { source: '/services/website/samples/:slug', destination: '/work/website/samples/:slug', permanent: true },
+      { source: '/services/blog', destination: '/work/blog', permanent: true },
+      // 사주 마이그 (단순 URL, 카탈로그 spec은 보류)
+      { source: '/saju', destination: '/work/saju', permanent: true },
+      { source: '/saju/input', destination: '/work/saju/input', permanent: true },
+      { source: '/saju/result', destination: '/work/saju/result', permanent: true },
+    ];
+  },
 };
 
 export default nextConfig;