style: MemberEdit 페이지 애니메이션 부드럽게 개선

- spring 애니메이션 적용
- scale 애니메이션 추가
- 더 부드러운 전환 효과

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

frontend-temp/src/pages/pc/admin/MemberEdit.jsx

@@ -162,14 +162,15 @@ function AdminMemberEdit() {
           <p className="text-gray-500">멤버 정보를 수정합니다</p>
         </div>
 
-        {loading ? (
-          <div className="flex justify-center items-center py-20">
-            <div className="animate-spin rounded-full h-12 w-12 border-4 border-primary border-t-transparent" />
-          </div>
-        ) : (
+        {!loading && (
           <motion.form
-            initial={{ opacity: 0, y: 20 }}
+            initial={{ opacity: 0, y: 12 }}
             animate={{ opacity: 1, y: 0 }}
+            transition={{
+              duration: 0.4,
+              ease: [0.25, 0.1, 0.25, 1],
+              delay: 0.15,
+            }}
             onSubmit={handleSubmit}
             className="bg-white rounded-2xl p-8 border border-gray-100 shadow-sm"
           >