feat: 添加日志配置和Logback依赖

refactor: 重构实体类equals和hashCode方法

fix: 修复WebSocketService消息发送逻辑

style: 格式化代码和优化导入

docs: 更新JacksonConfig日期序列化格式

test: 添加CompanyFilePathTableCell测试类

chore: 清理无用代码和注释

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

@@ -1,10 +1,7 @@
 package com.ecep.contract.service;
 
 import java.util.List;
-import java.util.Map;
 
-import org.springframework.data.domain.Page;
-import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 
 import com.ecep.contract.model.ContractItem;
@@ -14,31 +11,6 @@ import com.ecep.contract.vm.ContractItemViewModel;
 @Service
 public class ContractItemService extends QueryService<ContractItem, ContractItemViewModel> {
 
-    @Override
-    public ContractItem findById(Integer id) {
-        throw new UnsupportedOperationException("Unimplemented method 'findById'");
-    }
-
-    @Override
-    public ContractItem save(ContractItem entity) {
-        throw new UnsupportedOperationException("Unimplemented method 'save'");
-    }
-
-    @Override
-    public void delete(ContractItem entity) {
-        throw new UnsupportedOperationException("Unimplemented method 'delete'");
-    }
-
-    @Override
-    public List<ContractItem> findAll() {
-        throw new UnsupportedOperationException("Unimplemented method 'findAll'");
-    }
-
-    @Override
-    public Page<ContractItem> findAll(Map<String, Object> params, Pageable pageable) {
-        throw new UnsupportedOperationException("Unimplemented method 'findAll'");
-    }
-
     public List<ContractItem> findAllByInventory(Inventory parent) {
         throw new UnsupportedOperationException("Unimplemented method 'findAllByInventory'");
     }