refactor(client): 重构服务类继承关系并统一使用QueryService

重构所有服务类，使其继承自QueryService接口，统一数据查询逻辑。同时为服务类添加@Service注解，确保Spring容器管理。更新相关FXML文件的控制器路径，从manager.ds调整为controller目录结构。调整pom.xml版本号至0.0.84-SNAPSHOT。新增MessageNotitfication和SimpleMessage消息类，提供基础消息结构支持。

client/src/main/java/com/ecep/contract/service/EmployeeService.java

@@ -2,11 +2,14 @@ package com.ecep.contract.service;
 
 import java.util.List;
 
+import org.springframework.stereotype.Service;
+
 import com.ecep.contract.model.Employee;
 import com.ecep.contract.model.EmployeeRole;
 import com.ecep.contract.vm.EmployeeViewModel;
 
-public class EmployeeService implements ViewModelService<Employee, EmployeeViewModel> {
+@Service
+public class EmployeeService extends QueryService<Employee, EmployeeViewModel> {
 
     public static final int DEFAULT_SYSTEM_EMPLOYEE_ID = 26;
 
@@ -24,12 +27,6 @@ public class EmployeeService implements ViewModelService<Employee, EmployeeViewM
         // TODO Auto-generated method stub
         throw new UnsupportedOperationException("Unimplemented method 'updateActive'");
     }
-
-    public List<Employee> search(String searchText) {
-        // TODO Auto-generated method stub
-        throw new UnsupportedOperationException("Unimplemented method 'search'");
-    }
-
     public Employee findByCode(String personCode) {
         // TODO Auto-generated method stub
         throw new UnsupportedOperationException("Unimplemented method 'findByCode'");