refactor(i18n): 사용자 문구 참조를 중앙화

src/shared/ui/Modal.tsx

@@ -2,6 +2,7 @@
 
 import type { ReactNode } from 'react';
 import { useEffect } from 'react';
+import { copy } from '@/shared/i18n';
 import { cn } from '@/shared/lib/cn';
 import { useReducedMotion } from '@/shared/lib/useReducedMotion';
 
@@ -50,7 +51,7 @@ export const Modal = ({
     <div className="fixed inset-0 z-50 flex items-end justify-center p-4 sm:items-center">
       <button
         type="button"
-        aria-label="모달 닫기"
+        aria-label={copy.modal.closeAriaLabel}
         onClick={onClose}
         className="absolute inset-0 bg-slate-900/52 backdrop-blur-[2px]"
       />
@@ -81,7 +82,7 @@ export const Modal = ({
               onClick={onClose}
               className="rounded-lg border border-brand-dark/16 bg-white/58 px-2.5 py-1.5 text-xs text-brand-dark/82 transition hover:bg-white/84 hover:text-brand-dark"
             >
-              닫기
+              {copy.modal.closeButton}
             </button>
           </div>
         </header>