修改测试问题

src/utils/echartMethod.ts

@@ -161,6 +161,41 @@ export const exportCSV = (title: object, data: any, filename: string) => {
     URL.revokeObjectURL(link.href)
 }
 
+/**
+ * 将多条折线按时间对齐合并为 CSV 行（避免各 series 长度不一致时按索引对齐丢数据）
+ */
+export const buildSeriesCsvData = (seriesList: Array<{ name: string; data?: any[] }>) => {
+    if (!seriesList?.length) {
+        return { titles: [], rows: [] }
+    }
+    const titles = seriesList.map(s => s.name)
+    const timeMap = new Map<string, (string | number | null)[]>()
+
+    seriesList.forEach((series, seriesIndex) => {
+        series.data?.forEach((point: any) => {
+            const time = point?.[0]
+            if (!time) return
+            const timeKey = String(time)
+            if (!timeMap.has(timeKey)) {
+                timeMap.set(timeKey, [timeKey, ...Array(seriesList.length).fill(null)])
+            }
+            const row = timeMap.get(timeKey)!
+            row[seriesIndex + 1] = point[1] ?? null
+        })
+    })
+
+    const rows = Array.from(timeMap.values()).sort(
+        (a, b) => new Date(a[0] as string).getTime() - new Date(b[0] as string).getTime()
+    )
+    return { titles, rows }
+}
+
+export const exportSeriesCSV = (seriesList: Array<{ name: string; data?: any[] }>, filename: string) => {
+    const { titles, rows } = buildSeriesCsvData(seriesList)
+    if (!rows.length) return
+    exportCSV(titles, rows, filename)
+}
+
 /**
  * 补全时间序列数据中缺失的条目
  * @param rawData 原始数据，格式为 [["时间字符串", "数值", "单位", "类型"], ...]