feat(platform): export mileage statistics page

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

@@ -3,6 +3,7 @@ import { useEffect, useState } from 'react';
 import { api } from '../api/client';
 import type { DailyMileageRow, MileageSummary } from '../api/types';
 import { PageHeader } from '../components/PageHeader';
+import { buildCsv, downloadCsv, type CsvColumn } from '../domain/csvExport';
 
 const emptySummary: MileageSummary = {
   vehicleCount: 0,
@@ -93,6 +94,23 @@ function maxMileageRow(rows: DailyMileageRow[]) {
   }, undefined);
 }
 
+const mileageExportColumns: CsvColumn<DailyMileageRow>[] = [
+  { title: '日期', value: (row) => row.date },
+  { title: 'VIN', value: (row) => row.vin },
+  { title: '车牌', value: (row) => row.plate },
+  { title: '来源', value: (row) => row.source },
+  { title: '起始里程km', value: (row) => row.startMileageKm },
+  { title: '结束里程km', value: (row) => row.endMileageKm },
+  { title: '日里程km', value: (row) => row.dailyMileageKm },
+  { title: '异常', value: (row) => row.anomalySeverity || '正常' }
+];
+
+function exportFileName(filters: Record<string, string>) {
+  const keyword = filters.keyword?.trim() || 'all';
+  const protocol = filters.protocol?.trim() || 'all-source';
+  return `daily-mileage-${keyword}-${protocol}.csv`;
+}
+
 export function Mileage({
   initialVin,
   initialProtocol,
@@ -182,6 +200,14 @@ export function Mileage({
       ...(dateTo ? { dateTo } : {})
     });
   };
+  const exportMileage = () => {
+    if (rows.length === 0) {
+      Toast.warning('当前没有可导出的里程明细');
+      return;
+    }
+    downloadCsv(exportFileName(filters), buildCsv(mileageExportColumns, rows));
+    Toast.success(`已导出 ${rows.length} 条里程明细`);
+  };
 
   useEffect(() => {
     const nextFilters = mergeInitialFilters(initialVin, initialProtocol, initialFilters);
@@ -314,6 +340,12 @@ export function Mileage({
         </div>
       </Card>
       <Card bordered style={{ marginTop: 16 }}>
+        <div className="vp-table-toolbar">
+          <Space wrap>
+            <Tag color="blue">当前页 {rows.length.toLocaleString()} 条</Tag>
+            <Button size="small" onClick={exportMileage}>导出里程当前页 CSV</Button>
+          </Space>
+        </div>
         <Table
           loading={loading}
           rowKey={(row?: DailyMileageRow) => `${row?.date ?? ''}-${row?.vin ?? ''}-${row?.source ?? ''}`}

vehicle-data-platform/apps/web/src/test/App.test.tsx

@@ -4927,6 +4927,68 @@ test('shows mileage statistics workspace with trend source and definition', asyn
   expect(screen.getByText((content) => content.includes('区间总值应等于各日里程之和'))).toBeInTheDocument();
 });
 
+test('exports current mileage page as CSV', async () => {
+  window.history.replaceState(null, '', '/#/mileage?keyword=VIN-MILEAGE-EXPORT&protocol=JT808');
+  const createObjectURL = vi.spyOn(URL, 'createObjectURL').mockReturnValue('blob:mileage-export');
+  const revokeObjectURL = vi.spyOn(URL, 'revokeObjectURL').mockImplementation(() => undefined);
+  vi.spyOn(globalThis, 'fetch').mockImplementation(async (input) => {
+    const path = String(input);
+    if (path.includes('/api/ops/health')) {
+      return {
+        ok: true,
+        json: async () => ({
+          data: { linkHealth: [], kafkaLag: 0, redisOnlineKeys: 0, tdengineWritable: true, mysqlWritable: true, runtime: { requestTimeoutMs: 5000 } },
+          traceId: 'trace-test',
+          timestamp: 1783094400000
+        })
+      } as Response;
+    }
+    if (path.includes('/api/mileage/summary')) {
+      return {
+        ok: true,
+        json: async () => ({
+          data: { vehicleCount: 1, recordCount: 1, sourceCount: 1, totalMileageKm: 42.5, averageMileagePerVin: 42.5 },
+          traceId: 'trace-test',
+          timestamp: 1783094400000
+        })
+      } as Response;
+    }
+    if (path.includes('/api/mileage/daily')) {
+      return {
+        ok: true,
+        json: async () => ({
+          data: {
+            items: [
+              { vin: 'VIN-MILEAGE-EXPORT', plate: '粤A导出1', source: 'JT808', date: '2026-07-03', startMileageKm: 100, endMileageKm: 142.5, dailyMileageKm: 42.5, anomalySeverity: '' }
+            ],
+            total: 1,
+            limit: 20,
+            offset: 0
+          },
+          traceId: 'trace-test',
+          timestamp: 1783094400000
+        })
+      } as Response;
+    }
+    return {
+      ok: true,
+      json: async () => ({
+        data: { items: [], total: 0, limit: 20, offset: 0 },
+        traceId: 'trace-test',
+        timestamp: 1783094400000
+      })
+    } as Response;
+  });
+
+  render(<App />);
+
+  expect(await screen.findByText('VIN-MILEAGE-EXPORT')).toBeInTheDocument();
+  fireEvent.click(screen.getByRole('button', { name: '导出里程当前页 CSV' }));
+
+  expect(createObjectURL).toHaveBeenCalled();
+  expect(revokeObjectURL).toHaveBeenCalledWith('blob:mileage-export');
+});
+
 test('opens vehicle service from history results with row source evidence', async () => {
   window.history.replaceState(null, '', '/#/history?keyword=%E7%B2%A4AG18312&protocol=JT808');
   vi.spyOn(globalThis, 'fetch').mockImplementation(async (input, init) => {