chore(blog): /work/blog 라우트·참조·메타 완전 제거 (2026-05-29 재정의)

- app/work/blog/, lib/blog-tools/ 폴더 삭제
- 홈·work 허브 카드/카피, footer 링크에서 블로그 자동화 제거
- layout.tsx keywords·description·JSON-LD Offer 제거
- refund 약관 상품 목록 정리, sitemap /services/blog 엔트리 제거
- next.config: /services/blog·/work/blog → /work 301 리다이렉트

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

next.config.ts

@@ -39,7 +39,9 @@ const nextConfig: NextConfig = {
       { 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 },
+      // 블로그 자동화 폐기(2026-05-29 재정의): 기존 URL은 제품 라인 허브로 안내
+      { source: '/services/blog', destination: '/work', permanent: true },
+      { source: '/work/blog', destination: '/work', 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 },