update src/main/java/com/youlai/system/config/WebSocketConfig.java.

使用本地websocket的时候，发现后台一直报错无法拿到用户信息，找到一处常量错误

Signed-off-by: 懒人与猫 <lazycat_casillas@qq.com>

src/main/java/com/youlai/system/config/WebSocketConfig.java

@@ -79,7 +79,10 @@ public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
                     if (StrUtil.isNotBlank(bearerToken) && bearerToken.startsWith("Bearer ")) {
                         try {
                             // 移除 "Bearer " 前缀，从令牌中提取用户信息(username), 并设置到认证信息中
-                            String username = JwtUtils.parseToken(bearerToken).get("name").toString();
+                            
+                            // 这里不应该用"name"
+                            // String username = JwtUtils.parseToken(bearerToken).get("name").toString();
+                            String username = JwtUtils.parseToken(bearerToken).get(JWTPayload.SUBJECT).toString();
 
                             if (StrUtil.isNotBlank(username)) {
                                 accessor.setUser(() -> username);