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

common/src/main/java/com/ecep/contract/vo/InvoiceVo.java

@@ -5,18 +5,11 @@ import java.time.LocalDate;
 import lombok.Data;
 
 @Data
-public class InvoiceVo implements IdentityEntity {
+public class InvoiceVo implements IdentityEntity, CompanyBasedVo {
     private Integer id;
-    private Integer contractId;
-    private Integer contractItemId;
-    private String invoiceNumber;
+    private Integer companyId;
+    private String code;
     private LocalDate invoiceDate;
-    private LocalDate issueDate;
-    private Double amount;
-    private Double taxAmount;
-    private Double taxRate;
-    private Double totalAmount;
-    private Integer invoiceStatusId;
-    private String remark;
+    private String description;
     private Boolean active = false;
 }