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/vm/EmployeeRoleViewModel.java

@@ -2,7 +2,7 @@ package com.ecep.contract.vm;
 
 import java.util.Objects;
 
-import com.ecep.contract.model.EmployeeRole;
+import com.ecep.contract.vo.EmployeeRoleVo;
 
 import javafx.beans.property.SimpleBooleanProperty;
 import javafx.beans.property.SimpleStringProperty;
@@ -11,21 +11,21 @@ import lombok.EqualsAndHashCode;
 
 @Data
 @EqualsAndHashCode(callSuper = false)
-public class EmployeeRoleViewModel extends IdentityViewModel<EmployeeRole> {
+public class EmployeeRoleViewModel extends IdentityViewModel<EmployeeRoleVo> {
     private SimpleStringProperty code = new SimpleStringProperty();
     private SimpleStringProperty name = new SimpleStringProperty();
     private SimpleBooleanProperty systemAdministrator = new SimpleBooleanProperty();
     private SimpleBooleanProperty manager = new SimpleBooleanProperty();
     private SimpleBooleanProperty active = new SimpleBooleanProperty();
 
-    public static EmployeeRoleViewModel from(EmployeeRole v) {
+    public static EmployeeRoleViewModel from(EmployeeRoleVo v) {
         EmployeeRoleViewModel model = new EmployeeRoleViewModel();
         model.update(v);
         return model;
     }
 
     @Override
-    protected void updateFrom(EmployeeRole v) {
+    protected void updateFrom(EmployeeRoleVo v) {
         super.updateFrom(v);
         getCode().set(v.getCode());
         getName().set(v.getName());
@@ -35,7 +35,7 @@ public class EmployeeRoleViewModel extends IdentityViewModel<EmployeeRole> {
     }
 
     @Override
-    public boolean copyTo(EmployeeRole v) {
+    public boolean copyTo(EmployeeRoleVo v) {
         boolean modified = super.copyTo(v);
         if (!Objects.equals(getCode().get(), v.getCode())) {
             v.setCode(getCode().get());