refactor: 멤버 영어이름 하드코딩 제거, API에서 가져오도록 변경

- MEMBER_ENGLISH_NAMES 상수 제거
- Birthday 페이지에서 member.name_en 사용

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend-temp/src/constants/index.js

@@ -57,16 +57,3 @@ export const MONTH_NAMES = [
   '1월', '2월', '3월', '4월', '5월', '6월',
   '7월', '8월', '9월', '10월', '11월', '12월',
 ];
-
-/** 멤버 한글 이름 → 영어 이름 매핑 */
-export const MEMBER_ENGLISH_NAMES = {
-  송하영: 'HAYOUNG',
-  박지원: 'JIWON',
-  이채영: 'CHAEYOUNG',
-  이나경: 'NAKYUNG',
-  백지헌: 'JIHEON',
-  장규리: 'GYURI',
-  이새롬: 'SAEROM',
-  노지선: 'JISUN',
-  이서연: 'SEOYEON',
-};

frontend-temp/src/pages/schedule/mobile/Birthday.jsx

@@ -3,7 +3,6 @@ import { useQuery } from '@tanstack/react-query';
 import { motion } from 'framer-motion';
 import { ChevronLeft } from 'lucide-react';
 import { fetchApi } from '@/api/client';
-import { MEMBER_ENGLISH_NAMES } from '@/constants';
 
 /**
  * Mobile 생일 페이지
@@ -13,7 +12,6 @@ function MobileBirthday() {
 
   // URL 디코딩
   const decodedMemberName = decodeURIComponent(memberName || '');
-  const englishName = MEMBER_ENGLISH_NAMES[decodedMemberName];
 
   // 멤버 정보 조회
   const {
@@ -61,7 +59,7 @@ function MobileBirthday() {
           </Link>
           <div className="flex-1 text-center">
             <span className="text-sm font-medium bg-gradient-to-r from-pink-500 via-purple-500 to-indigo-500 bg-clip-text text-transparent">
-              HAPPY {englishName} DAY
+              HAPPY {member?.name_en} DAY
             </span>
           </div>
           <div className="w-10" />
@@ -98,7 +96,7 @@ function MobileBirthday() {
               <div className="flex-1 text-white">
                 <div className="flex items-center gap-2 mb-1">
                   <span className="text-3xl">🎂</span>
-                  <h1 className="font-bold text-xl tracking-wide">HAPPY {englishName} DAY</h1>
+                  <h1 className="font-bold text-xl tracking-wide">HAPPY {member?.name_en} DAY</h1>
                 </div>
                 <p className="text-white/80 text-sm">
                   {year}년 {birthdayThisYear?.getMonth() + 1}월 {birthdayThisYear?.getDate()}일

frontend-temp/src/pages/schedule/pc/Birthday.jsx

@@ -3,7 +3,6 @@ import { useQuery } from '@tanstack/react-query';
 import { motion } from 'framer-motion';
 import { ChevronRight } from 'lucide-react';
 import { fetchApi } from '@/api/client';
-import { MEMBER_ENGLISH_NAMES } from '@/constants';
 
 /**
  * PC 생일 페이지
@@ -13,7 +12,6 @@ function PCBirthday() {
 
   // URL 디코딩
   const decodedMemberName = decodeURIComponent(memberName || '');
-  const englishName = MEMBER_ENGLISH_NAMES[decodedMemberName];
 
   // 멤버 정보 조회
   const {
@@ -61,7 +59,7 @@ function PCBirthday() {
           </Link>
           <ChevronRight size={14} />
           <span className="font-medium bg-gradient-to-r from-pink-500 via-purple-500 to-indigo-500 bg-clip-text text-transparent">
-            HAPPY {englishName} DAY
+            HAPPY {member?.name_en} DAY
           </span>
         </div>
 
@@ -96,7 +94,7 @@ function PCBirthday() {
             <div className="flex-1 text-white">
               <div className="flex items-center gap-3 mb-2">
                 <span className="text-5xl">🎂</span>
-                <h1 className="font-bold text-4xl tracking-wide">HAPPY {englishName} DAY</h1>
+                <h1 className="font-bold text-4xl tracking-wide">HAPPY {member?.name_en} DAY</h1>
               </div>
               <p className="text-white/80 text-lg mt-2">
                 {year}년 {birthdayThisYear?.getMonth() + 1}월 {birthdayThisYear?.getDate()}일