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/task/Tasker.java

@@ -1,30 +1,32 @@
 package com.ecep.contract.task;
 
+import java.util.Locale;
+import java.util.logging.Level;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.BeansException;
+
 import com.ecep.contract.Desktop;
 import com.ecep.contract.Message;
 import com.ecep.contract.MessageHolder;
 import com.ecep.contract.SpringApp;
-import com.ecep.contract.model.Employee;
 import com.ecep.contract.service.CompanyService;
 import com.ecep.contract.service.EmployeeService;
 import com.ecep.contract.service.SysConfService;
+import com.ecep.contract.vo.EmployeeVo;
+
 import javafx.application.Platform;
 import javafx.beans.property.StringProperty;
 import javafx.concurrent.Task;
 import javafx.scene.control.ListCell;
 import lombok.Setter;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.beans.BeansException;
-
-import java.util.Locale;
-import java.util.logging.Level;
 
 public abstract class Tasker<T> extends Task<T> {
     private static final Logger logger = LoggerFactory.getLogger(Tasker.class);
     @Setter
     protected java.util.function.Predicate<Message> messageHandler;
-    private Employee currentUser;
+    private EmployeeVo currentUser;
     @Setter
     private CompanyService companyService;
     @Setter
@@ -57,7 +59,7 @@ public abstract class Tasker<T> extends Task<T> {
         return SpringApp.getBean(requiredType);
     }
 
-    public Employee getCurrentUser() {
+    public EmployeeVo getCurrentUser() {
         if (currentUser == null) {
             currentUser = getEmployeeService().findById(Desktop.instance.getActiveEmployeeId());
         }