fix(service): 修复空列表处理避免空指针异常

buhuazhen

2026-04-22 252766e40f844145579317509cf5136a8e6d2de4

 src/main/java/com/ruoyi/basic/dto/CustomerDto.java

@@ -21,4 +21,8 @@

    private List<CustomerFollowUpDto> followUpList;

    private String usageUserName;

    private String togetherUserNames;

}