fix: 로그아웃 시 404 수정

Author: sapiens2000

src/main/java/com/example/log4u/common/oauth2/jwt/JwtLogoutFilter.java

@@ -127,12 +127,18 @@ private String extractRefreshTokenFromCookie(HttpServletRequest request) {
 		return refresh;
 	}
 
-	public void logout(HttpServletResponse response, String refresh) {
+	public void logout(HttpServletResponse response, String refresh) throws IOException {
 		// DB 에서 리프레시 토큰 제거
 		refreshTokenRepository.deleteByRefresh(refresh);
 		// 쿠키 제거
 		CookieUtil.deleteCookie(response, ACCESS_TOKEN);
 		CookieUtil.deleteCookie(response, REFRESH_TOKEN);
+
+		// 응답 (404 방지)
+		response.setStatus(HttpServletResponse.SC_OK);
+		response.setContentType("application/json");
+		response.getWriter().write("{\"message\": \"로그아웃 성공\"}");
+		response.getWriter().flush();
 	}
 
 }