chore(phase0): PortOne 잔재 제거 — 계좌이체 단일 소스 확정, saju 결제 CTA 제거

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

app/work/saju/page.tsx

@@ -2,7 +2,6 @@
 
 import { useEffect, useState } from 'react';
 import Link from 'next/link';
-import PaymentButton from '@/app/components/PaymentButton';
 import { createClient } from '@/lib/supabase/client';
 
 const faqItems = [

app/work/saju/result/SajuAISection.tsx

@@ -3,7 +3,6 @@
 import { useState, useEffect, useRef } from 'react';
 import ReactMarkdown from 'react-markdown';
 import remarkGfm from 'remark-gfm';
-import PaymentButton from '@/app/components/PaymentButton';
 
 interface BirthKey {
   birth_year: number;
@@ -313,13 +312,10 @@ export default function SajuAISection({
             ))}
           </div>
 
-          <PaymentButton
-            productId="saju_detail"
-            className="inline-flex items-center gap-2 bg-amber-400 hover:bg-amber-300 text-[#04102b] font-bold px-7 py-3 rounded-xl transition-all"
-          >
-            AI 상세 해석 받기 — 1,000원
-          </PaymentButton>
-          <p className="text-blue-200/40 text-xs mt-3">결제 후 즉시 AI 분석 시작 · 로그인 필요</p>
+          <p className="inline-flex items-center gap-2 bg-white/10 text-blue-100/80 font-semibold px-7 py-3 rounded-xl">
+            AI 상세 해석은 서비스 개편 준비 중입니다
+          </p>
+          <p className="text-blue-200/40 text-xs mt-3">사주 서비스 개편(Phase 2)에서 무료 제공 예정</p>
         </div>
       </div>
     );