refactor: AI 음악 메인 개편 — 로또/프롬프트/자동화 삭제, 음악/블로그 팩 신규

- 삭제: services/{lotto,prompt,automation,ai-kit,stock,tools} + api/{lotto,tools}
- 노출 제거: /freelance, /services/website (noindex + robots/sitemap 제외, 외부 지원서 링크 유지)
- 신규: /services/music (3-tier 39k/99k/149k, 4단계 프로세스)
- 신규: /services/blog (블로그 자동화 팩 29k 1회성)
- 신규: PurchaseAgreementModal (전자상거래법 17조 동의 + 계좌이체)
- 개편: 홈 대시보드 (음악 Hero + 사주/블로그팩/일반문의 서브카드)
- 사이드바 재구성, sitemap/robots/JSON-LD 갱신
- 환불정책 신규 상품 반영 + 법적 근거 명시

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/sitemap.ts

@@ -5,47 +5,12 @@ export default function sitemap(): MetadataRoute.Sitemap {
   const now = new Date();
 
   return [
-    {
-      url: base,
-      lastModified: now,
-      changeFrequency: 'weekly',
-      priority: 1.0,
-    },
-    {
-      url: `${base}/freelance`,
-      lastModified: now,
-      changeFrequency: 'weekly',
-      priority: 0.9,
-    },
-    {
-      url: `${base}/services/automation`,
-      lastModified: now,
-      changeFrequency: 'weekly',
-      priority: 0.9,
-    },
-    {
-      url: `${base}/services/prompt`,
-      lastModified: now,
-      changeFrequency: 'weekly',
-      priority: 0.8,
-    },
-    {
-      url: `${base}/services/website`,
-      lastModified: now,
-      changeFrequency: 'monthly',
-      priority: 0.8,
-    },
-    {
-      url: `${base}/services/ai-kit`,
-      lastModified: now,
-      changeFrequency: 'weekly',
-      priority: 0.9,
-    },
-    {
-      url: `${base}/saju`,
-      lastModified: now,
-      changeFrequency: 'monthly',
-      priority: 0.5,
-    },
+    { url: base, lastModified: now, changeFrequency: 'weekly', priority: 1.0 },
+    { url: `${base}/services/music`, lastModified: now, changeFrequency: 'weekly', priority: 0.95 },
+    { url: `${base}/services/blog`, lastModified: now, changeFrequency: 'weekly', priority: 0.9 },
+    { url: `${base}/saju`, lastModified: now, changeFrequency: 'monthly', priority: 0.7 },
+    { url: `${base}/legal/terms`, lastModified: now, changeFrequency: 'yearly', priority: 0.3 },
+    { url: `${base}/legal/refund`, lastModified: now, changeFrequency: 'yearly', priority: 0.3 },
+    { url: `${base}/legal/privacy`, lastModified: now, changeFrequency: 'yearly', priority: 0.3 },
   ];
 }