feat: test코드 수정 및 디자인 패턴 md 파일 추가

Author: jeongah2651

docs/design/jalee_validation_design_point.md

@@ -1,10 +1,12 @@
 import InputForm from '../common/InputForm.tsx';
 import { useLoginState } from '../../stores/loginStore.ts';
-import { isValidPassword } from '../../utils/authUtils.ts';
+import { LooseValidation, ValidateProcessor } from '@/utils/authUtils.ts';
 
 const PasswordInput = () => {
   const { password, passwordHandler } = useLoginState();
 
+  const validator = new ValidateProcessor(new LooseValidation());
+
   return (
     <InputForm
       defaultValue={password}
@@ -16,7 +18,7 @@ const PasswordInput = () => {
       type={'password'}
       id={'password-input'}
       aria-label={'login-password-input'}
-      error={!isValidPassword(password)}
+      error={!validator.isValidPassword(password)}
       errorText={'비밀번호는 6자리 이상이어야 합니다.'}
     />
   );