refactor: 生成代码重构优化

src/main/java/com/youlai/boot/config/CaptchaConfig.java

@@ -36,7 +36,7 @@ public class CaptchaConfig {
         } else if ("random".equalsIgnoreCase(codeType)) {
             return new RandomGenerator(codeLength);
         } else {
-            throw new IllegalArgumentException("Invalid captcha generator type: " + codeType);
+            throw new IllegalArgumentException("Invalid captcha codegen type: " + codeType);
         }
     }