fix(sso): 修复验证码每次返回相同图片的问题

每次调用createCode()重新生成验证码

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

txw-sso/txw-sso-service-biz/src/main/java/com/css/txw/sso/service/verify/VerifyServiceImpl.java

@@ -63,6 +63,8 @@ public class VerifyServiceImpl implements VerifyService {
     @Override
     public CommonResult<Map<String, String>> getCaptcha(String remoteId) {
         cn.hutool.captcha.CircleCaptcha circleCaptcha = (cn.hutool.captcha.CircleCaptcha) lineCaptcha;
+        // 重新生成验证码，否则返回的总是相同的图片
+        circleCaptcha.createCode();
         String code = circleCaptcha.getCode();
         String uuid = IdUtil.fastSimpleUUID();