fix(sso): 修复Bean方法名与字段名冲突

Bean方法名从lineCaptcha改为captchaGenerator，避免与@Resource字段名冲突

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

@@ -31,7 +31,7 @@ public class VerifyServiceImpl implements VerifyService {
     private ICaptcha lineCaptcha;
 
     @Bean
-    public ICaptcha lineCaptcha() {
+    public ICaptcha captchaGenerator() {
         RandomGenerator randomGenerator = new RandomGenerator("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz", 4);
         cn.hutool.captcha.CircleCaptcha captcha = CaptchaUtil.createCircleCaptcha(120, 40, 4, 20);
         captcha.setGenerator(randomGenerator);