支持在线时间跨天并优化发布与筛选体验

允许在线时段 end 早于 start 表示跨天，统一展示「次日」文案；修复移动端价格区间清空后被 sessionStorage 回写；优化 PC/移动端在线时间控件密度与通栏展示。

frontend/src/shared/utils/listingDisplay.ts

@@ -242,14 +242,48 @@ export function assetRegions(item: Listing) {
     : []
 }
 
+/** 格式化在线时段；end < start 视为跨天，展示「次日」。 */
+export function formatOnlineTimeRange(start: string, end: string) {
+  const startText = String(start || '').trim()
+  const endText = String(end || '').trim()
+  if (!startText || !endText) return ''
+  if (
+    startText === '全天' ||
+    endText === '全天' ||
+    (startText === '00:00' && endText === '23:59')
+  ) {
+    return '全天'
+  }
+  const startMinute = parseClockToMinute(startText)
+  const endMinute = parseClockToMinute(endText)
+  const startLabel = formatClockLabel(startText)
+  const endLabel = formatClockLabel(endText)
+  if (startMinute !== null && endMinute !== null && endMinute < startMinute) {
+    return `${startLabel}-次日${endLabel}点`
+  }
+  return `${startLabel}-${endLabel}点`
+}
+
 export function getOnlineTimeText(item: Listing) {
   const onlineTime = item.asset_summary?.online_time
   if (typeof onlineTime !== 'object' || onlineTime === null) return ''
   const start = (onlineTime as Record<string, unknown>).start
   const end = (onlineTime as Record<string, unknown>).end
   if (typeof start !== 'string' || typeof end !== 'string' || !start || !end) return ''
-  if (start === '全天' || end === '全天' || (start === '00:00' && end === '23:59')) return '全天'
-  return `${start.replace(':00', '')}-${end.replace(':00', '')}点`
+  return formatOnlineTimeRange(start, end)
+}
+
+function parseClockToMinute(value: string) {
+  const match = /^(\d{1,2}):(\d{2})$/.exec(value.trim())
+  if (!match) return null
+  const hour = Number(match[1])
+  const minute = Number(match[2])
+  if (hour < 0 || hour > 23 || minute < 0 || minute > 59) return null
+  return hour * 60 + minute
+}
+
+function formatClockLabel(value: string) {
+  return value.endsWith(':00') ? value.slice(0, -3) : value
 }
 
 export function getDailyLoss(item: Listing) {