修复jiandaoyun_record_id字段处理问题：确保null值也能被正确检测

src/services/databaseService.js

@@ -116,8 +116,15 @@ class DatabaseService {
           console.log(`用户 ${userId} 有收藏商品，同步状态已重置为未同步`);
         }
 
+        // 确保user对象始终包含jiandaoyun_record_id字段
+        // 即使该字段的值为null
+        const userWithRecordId = {
+          ...user,
+          jiandaoyun_record_id: user.jiandaoyun_record_id
+        };
+
         syncData.push({
-          user,
+          user: userWithRecordId,
           userManagement: userManagements[0] || {},
           products,
           userId: userId // 保存用户ID，用于同步后更新状态

src/services/jiandaoyunService.js

@@ -156,7 +156,7 @@ class JiandaoyunService {
       try {
         // 检查数据库中是否已有简道云记录ID
         let recordId = null;
-        if (item.user && item.user.jiandaoyun_record_id) {
+        if (item.user && 'jiandaoyun_record_id' in item.user) {
           recordId = item.user.jiandaoyun_record_id;
           console.log(`从数据库获取到简道云记录ID: ${recordId}`);
         }