Refactor RegisterForm component

Splits the RegisterForm component into smaller, more manageable components to improve code readability and maintainability.

src/components/auth/EmailConfirmation.tsx

@@ -0,0 +1,55 @@
+
+import React from "react";
+import { useNavigate } from "react-router-dom";
+import { Mail, InfoIcon } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import { Alert, AlertDescription, AlertTitle } from "@/components/ui/alert";
+
+interface EmailConfirmationProps {
+  email: string;
+  onBackToForm: () => void;
+}
+
+const EmailConfirmation: React.FC<EmailConfirmationProps> = ({ email, onBackToForm }) => {
+  const navigate = useNavigate();
+
+  return (
+    <div className="neuro-flat p-8 mb-6">
+      <div className="text-center space-y-6">
+        <Mail className="w-16 h-16 mx-auto text-neuro-income" />
+        <h2 className="text-2xl font-bold">이메일 인증이 필요합니다</h2>
+        <p className="text-gray-600">
+          <strong>{email}</strong>로 인증 링크가 포함된 이메일을 보냈습니다.
+          이메일을 확인하고 링크를 클릭하여 계정 등록을 완료해주세요.
+        </p>
+        
+        <Alert className="bg-blue-50 border-blue-200 my-6">
+          <InfoIcon className="h-5 w-5 text-blue-600" />
+          <AlertTitle className="text-blue-700">인증 이메일이 보이지 않나요?</AlertTitle>
+          <AlertDescription className="text-blue-600">
+            스팸 폴더를 확인해보세요. 또는 다른 이메일 주소로 다시 시도하실 수 있습니다.
+          </AlertDescription>
+        </Alert>
+        
+        <div className="space-y-4 pt-4">
+          <Button 
+            onClick={() => navigate("/login")} 
+            variant="outline" 
+            className="w-full"
+          >
+            로그인 페이지로 이동
+          </Button>
+          <Button 
+            onClick={onBackToForm} 
+            variant="ghost" 
+            className="w-full"
+          >
+            회원가입 양식으로 돌아가기
+          </Button>
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default EmailConfirmation;