fix(oa): 解决项目客户ID更新与查询问题

- 添加客户ID字段更新策略，允许设置为null
- 增加客户ID作为项目查询的筛选条件- 处理客户ID为0时的特殊逻辑，自动转换为null- 优化项目列表查询，支持按客户ID过滤

ruoyi-oa/src/main/java/com/ruoyi/oa/domain/SysOaProject.java

@@ -162,6 +162,7 @@ public class SysOaProject extends BaseEntity {
     private Integer postponeCount;
 
     //客户id
+    @TableField(updateStrategy = FieldStrategy.IGNORED)
     private Long customerId;
 
 }

ruoyi-oa/src/main/java/com/ruoyi/oa/service/impl/SysOaProjectServiceImpl.java

@@ -190,6 +190,8 @@ public class SysOaProjectServiceImpl implements ISysOaProjectService {
         lqw.between(params.get("beginCreateTime") != null && params.get("endCreateTime") != null,
                 SysOaProject::getCreateTime, params.get("beginCreateTime"), params.get("endCreateTime"));
         lqw.orderByDesc(SysOaProject::getCreateTime);
+        //客户id作为筛选条件
+        lqw.eq(bo.getCustomerId() != null, SysOaProject::getCustomerId, bo.getCustomerId());
         return lqw;
     }
 
@@ -220,7 +222,14 @@ public class SysOaProjectServiceImpl implements ISysOaProjectService {
             // 只有当前缀在上面列表里，才真正去生成新编号
             bo.setProjectCode(codeGeneratorService.nextCode(prefix));
         }
+
         SysOaProject update = BeanUtil.toBean(bo, SysOaProject.class);
+
+        // 当 customerId 为 0 时，设置为 null
+        if (bo.getCustomerId() == 0) {
+            update.setCustomerId(null);
+        }
+
         validEntityBeforeSave(update);
         return baseMapper.updateById(update) > 0;
     }