fix: 修复 timestamp2string1 跨年显示问题，仅在数据跨年时显示年份

web/src/helpers/utils.jsx

@@ -217,15 +217,12 @@ export function timestamp2string(timestamp) {
   );
 }
 
-export function timestamp2string1(timestamp, dataExportDefaultTime = 'hour') {
+export function timestamp2string1(timestamp, dataExportDefaultTime = 'hour', showYear = false) {
   let date = new Date(timestamp * 1000);
-  // let year = date.getFullYear().toString();
+  let year = date.getFullYear();
   let month = (date.getMonth() + 1).toString();
   let day = date.getDate().toString();
   let hour = date.getHours().toString();
-  if (day === '24') {
-    console.log('timestamp', timestamp);
-  }
   if (month.length === 1) {
     month = '0' + month;
   }
@@ -235,11 +232,13 @@ export function timestamp2string1(timestamp, dataExportDefaultTime = 'hour') {
   if (hour.length === 1) {
     hour = '0' + hour;
   }
-  let str = month + '-' + day;
+  // 仅在跨年时显示年份
+  let str = showYear ? year + '-' + month + '-' + day : month + '-' + day;
   if (dataExportDefaultTime === 'hour') {
     str += ' ' + hour + ':00';
   } else if (dataExportDefaultTime === 'week') {
     let nextWeek = new Date(timestamp * 1000 + 6 * 24 * 60 * 60 * 1000);
+    let nextWeekYear = nextWeek.getFullYear();
     let nextMonth = (nextWeek.getMonth() + 1).toString();
     let nextDay = nextWeek.getDate().toString();
     if (nextMonth.length === 1) {
@@ -248,11 +247,20 @@ export function timestamp2string1(timestamp, dataExportDefaultTime = 'hour') {
     if (nextDay.length === 1) {
       nextDay = '0' + nextDay;
     }
-    str += ' - ' + nextMonth + '-' + nextDay;
+    // 周视图结束日期也仅在跨年时显示年份
+    let nextStr = showYear ? nextWeekYear + '-' + nextMonth + '-' + nextDay : nextMonth + '-' + nextDay;
+    str += ' - ' + nextStr;
   }
   return str;
 }
 
+// 检查时间戳数组是否跨年
+export function isDataCrossYear(timestamps) {
+  if (!timestamps || timestamps.length === 0) return false;
+  const years = new Set(timestamps.map(ts => new Date(ts * 1000).getFullYear()));
+  return years.size > 1;
+}
+
 export function downloadTextAsFile(text, filename) {
   let blob = new Blob([text], { type: 'text/plain;charset=utf-8' });
   let url = URL.createObjectURL(blob);