refactor(vo): 重构VO对象结构，统一字段命名和接口实现

重构所有VO对象，统一字段命名规范，移除冗余字段，优化接口实现
新增Voable接口用于VO对象转换
调整BaseViewModel和ProjectBasedViewModel接口定义
更新相关服务和控制器以适应VO对象变更

client/src/main/java/com/ecep/contract/converter/CompanyStringConverter.java

@@ -4,14 +4,14 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Lazy;
 import org.springframework.stereotype.Component;
 
-import com.ecep.contract.model.Company;
 import com.ecep.contract.service.CompanyService;
+import com.ecep.contract.vo.CompanyVo;
 
 import jakarta.annotation.PostConstruct;
 
 @Lazy
 @Component
-public class CompanyStringConverter extends EntityStringConverter<Company> {
+public class CompanyStringConverter extends EntityStringConverter<CompanyVo> {
 
     @Lazy
     @Autowired