feat: 添加按ID查询的仓库方法并优化合同同步逻辑

添加了多个仓库的按ID查询方法，如findByCompanyId和findAllByContractId
优化了合同同步任务，使用ContractVo替代Contract减少数据库访问
重构了部分服务方法，支持通过ID直接操作，提升性能
修复了ProjectCostService中字段映射错误的问题

client/src/main/java/com/ecep/contract/controller/project/cost/ProjectCostTabSkinBase.java

@@ -38,17 +38,13 @@ public class ProjectCostTabSkinBase
         implements TabSkin {
     @Setter
     LocalDateTimeStringConverter localDateTimeStringConverter;
-    ProjectService projectService;
 
     public ProjectCostTabSkinBase(ProjectCostWindowController controller) {
         super(controller);
     }
 
     ProjectService getProjectService() {
-        if (projectService == null) {
-            projectService = getBean(ProjectService.class);
-        }
-        return projectService;
+        return getCachedBean(ProjectService.class);
     }
 
     private LocalDateTimeStringConverter getLocalDateTimeStringConverter() {

client/src/main/java/com/ecep/contract/converter/InventoryStringConverter.java

@@ -0,0 +1,46 @@
+package com.ecep.contract.converter;
+
+import com.ecep.contract.service.InventoryService;
+import com.ecep.contract.vo.InventoryVo;
+import javafx.util.StringConverter;
+
+/**
+ * 存货字符串转换器
+ * 用于在UI组件中显示存货信息并支持从字符串还原存货对象
+ */
+public class InventoryStringConverter extends StringConverter<InventoryVo> {
+    
+    /** 存货服务，用于从字符串查找对应的存货对象 */
+    private final InventoryService service;
+
+    /**
+     * 构造函数
+     * 
+     * @param service 存货服务实例
+     */
+    public InventoryStringConverter(InventoryService service) {
+        this.service = service;
+    }
+
+    /**
+     * 将存货对象转换为字符串表示
+     * 
+     * @param object 存货对象
+     * @return 存货的名称，如果对象为null则返回空字符串
+     */
+    @Override
+    public String toString(InventoryVo object) {
+        return object == null ? "" : (object.getName()+"-"+  object.getSpecification());
+    }
+
+    /**
+     * 从字符串还原存货对象
+     * 
+     * @param string 存货名称
+     * @return 对应的存货对象，如果未找到则返回null
+     */
+    @Override
+    public InventoryVo fromString(String string) {
+        return service.findByName(string);
+    }
+}

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

@@ -2,6 +2,10 @@ package com.ecep.contract.service;
 
 import java.time.LocalDate;
 
+import com.ecep.contract.converter.CustomerFileTypeStringConverter;
+import com.ecep.contract.converter.InventoryStringConverter;
+import com.ecep.contract.vo.CustomerFileTypeLocalVo;
+import javafx.util.StringConverter;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
@@ -13,7 +17,7 @@ import com.ecep.contract.vo.InventoryVo;
 
 @Service
 public class InventoryService extends QueryService<InventoryVo, InventoryViewModel> {
-
+    private final StringConverter<InventoryVo> stringConverter = new InventoryStringConverter(this);
     @Override
     public InventoryVo createNewEntity() {
         InventoryVo inventory = new InventoryVo();
@@ -44,4 +48,8 @@ public class InventoryService extends QueryService<InventoryVo, InventoryViewMod
         return page.getContent().getFirst();
     }
 
+    @Override
+    public StringConverter<InventoryVo> getStringConverter() {
+        return stringConverter;
+    }
 }