feat: batch update - gift card breakdown spec, backend APIs, miniprogram pages, ETL finance recharge, docs & migrations

apps/DEMO-miniprogram/miniprogram/utils/render.ts

@@ -0,0 +1,21 @@
+/**
+ * 渲染辅助工具函数
+ * 纯函数，无 wx.* 依赖
+ */
+
+/**
+ * 从对象中提取指定字段，缺失字段填充 null
+ * @param item 数据对象
+ * @param fieldList 需要的字段名数组
+ * @returns 仅包含指定字段的新对象
+ */
+export function getRequiredFields(
+  item: Record<string, any>,
+  fieldList: string[]
+): Record<string, any> {
+  const result: Record<string, any> = {}
+  for (const field of fieldList) {
+    result[field] = field in item ? item[field] : null
+  }
+  return result
+}