feat(platform): add online status handoff

vehicle-data-platform/apps/web/src/pages/Mileage.tsx

@@ -202,6 +202,44 @@ function mileageEvidencePackageText(row: DailyMileageRow) {
   ].join('\n');
 }
 
+function onlineStatusHandoffText({
+  filters,
+  summary,
+  rows,
+  total
+}: {
+  filters: Record<string, string>;
+  summary: OnlineStatisticsSummary;
+  rows: OnlineVehicleStatusRow[];
+  total: number;
+}) {
+  const keyword = filters.keyword?.trim() || '全部车辆';
+  const protocol = filters.protocol?.trim() || '全部来源';
+  const offlineRows = rows.filter((row) => !row.online);
+  const protocolLines = (summary.protocolStats ?? []).length > 0
+    ? summary.protocolStats.map((item) => `${item.protocol} ${item.online.toLocaleString()}/${item.total.toLocaleString()}`).join('；')
+    : '-';
+  return [
+    '【车辆在线状态交接】',
+    `车辆范围：${keyword}`,
+    `数据来源：${protocol}`,
+    `在线概览：${summary.onlineVehicleCount.toLocaleString()} 在线 / ${summary.offlineVehicleCount.toLocaleString()} 离线 / 在线率 ${formatPercent(summary.onlineRatePercent)}`,
+    `Redis 在线 Key：${summary.redisOnlineKeys == null ? '-' : summary.redisOnlineKeys.toLocaleString()}`,
+    `协议在线：${protocolLines}`,
+    `统计证据：${summary.evidence || '-'}`,
+    `当前页离线：${offlineRows.length.toLocaleString()} 辆 / 当前筛选 ${total.toLocaleString()} 辆`,
+    '',
+    '离线车辆：',
+    ...(offlineRows.length > 0 ? offlineRows.map((row, index) => [
+      `${index + 1}. ${row.plate || '-'} / ${row.vin || '-'} / ${row.oem || '-'}`,
+      `   离线时长：${formatOfflineDuration(row.offlineDurationMinutes)}；最后上报：${row.lastSeen || '-'}`,
+      `   来源覆盖：${row.onlineSourceCount}/${row.sourceCount}；协议：${(row.protocols ?? []).join('、') || '-'}`,
+      `   车辆服务：${appURL(buildAppHash({ page: 'detail', keyword: row.vin, protocol: filters.protocol?.trim() || row.protocols?.[0] || '' }))}`,
+      `   实时监控：${appURL(buildAppHash({ page: 'realtime', keyword: row.vin, protocol: filters.protocol?.trim() || row.protocols?.[0] || '' }))}`
+    ].join('\n')) : ['当前页暂无离线车辆'])
+  ].join('\n');
+}
+
 async function copyText(value: string, label: string) {
   const text = value.trim();
   if (!text) {
@@ -379,6 +417,17 @@ export function Mileage({
       '统计摘要'
     );
   };
+  const copyOnlineStatusHandoff = () => {
+    copyText(
+      onlineStatusHandoffText({
+        filters,
+        summary: onlineSummary,
+        rows: onlineRows,
+        total: onlinePagination.total
+      }),
+      '在线状态交接'
+    );
+  };
 
   useEffect(() => {
     const nextFilters = mergeInitialFilters(initialVin, initialProtocol, initialFilters);
@@ -592,6 +641,7 @@ export function Mileage({
             <Tag color="green">在线 {onlineVehicleCount.toLocaleString()} 车</Tag>
             <Tag color="orange">离线 {offlineVehicleCount.toLocaleString()} 车</Tag>
             <Typography.Text type="secondary">按车辆服务归并 VIN，展示最近上报时间、离线时长和来源覆盖。</Typography.Text>
+            <Button size="small" onClick={copyOnlineStatusHandoff}>复制在线状态清单</Button>
           </Space>
         </div>
         <Table