fix(approve): 修复审批流程为空时的异常处理

liyong

2026-04-30 c2ad2126d6f8423e0a5e6e20bbb91ef6bb1cffc0

 src/main/java/com/ruoyi/collaborativeApproval/dto/SealApplicationManagementDTO.java

@@ -8,4 +8,7 @@
    private String createUserName;
    //所属部门
    private String department;

    //审批人
    private String approveUserName;
}