feat: publish mileage assessment freshness

src/modules/mileage/StatisticsView.tsx

@@ -13,6 +13,7 @@ import type { TargetSummary, TargetVehicle, TargetYearlyAssessment, TrendPoint }
 import { fetchTargets, fetchTargetVehicles, fetchTrend } from './api';
 import Blur from '../../components/Blur';
 import { weightedCompletionRate } from '../../shared/analytics/metrics';
+import { formatMileageSnapshotDateTime } from './data-freshness';
 import MileageAttributionView from './MileageAttributionView';
 import {
   filterAttributionVehicles,
@@ -30,11 +31,6 @@ function getDefaultDate(): string {
   return `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, '0')}-${String(now.getDate()).padStart(2, '0')}`;
 }
 
-function getCurrentDateLabel(): string {
-  const now = new Date();
-  return `${now.getFullYear()}.${now.getMonth() + 1}.${now.getDate()}`;
-}
-
 function fmtKm(value: number): string {
   if (value >= 10000) return (value / 10000).toFixed(2) + '万';
   return value.toLocaleString();
@@ -53,12 +49,6 @@ function resolveAssessmentYear(target: TargetSummary, requestedYear?: number): n
   return getTargetAssessment(target, requestedYear)?.yearNumber;
 }
 
-function fmtDateLabel(date: string | null): string {
-  if (!date) return '';
-  const [year, month, day] = date.split('-');
-  return `${year}.${Number(month)}.${Number(day)}`;
-}
-
 function shortTargetName(name: string): string {
   // Extract the number and a short description
   const match = name.match(/(\d+)[辆台](.+)/);
@@ -74,7 +64,6 @@ function shortTargetName(name: string): string {
 }
 
 export default function StatisticsView() {
-  const currentDateLabel = getCurrentDateLabel();
   const [drillContext, setDrillContext] = useState<MileageDrillContext>(() => (
     parseMileageDrillContext(window.location.search)
   ));
@@ -642,7 +631,7 @@ export default function StatisticsView() {
                               <p className="text-[8px] font-bold text-slate-400 uppercase tracking-wider">{assessment.label}已完成</p>
                               <p className="text-[10px] font-black text-emerald-600">{fmtKm(assessment.completed)} km</p>
                               <p className="text-[8px] font-bold text-slate-300">
-                                数据截至 {assessment.daysLeft === 0 ? fmtDateLabel(assessment.endDate) : currentDateLabel}
+                                数据截至 {formatMileageSnapshotDateTime(target.snapshotUpdatedAt)}
                               </p>
                             </div>
                             <div className="space-y-0.5">

src/modules/mileage/data-freshness.test.ts

@@ -1,6 +1,6 @@
 import assert from 'node:assert/strict';
 import test from 'node:test';
-import { formatMileageSnapshotTime } from './data-freshness.js';
+import { formatMileageSnapshotDateTime, formatMileageSnapshotTime } from './data-freshness.js';
 
 test('formats snapshot instants in Asia/Shanghai', () => {
   assert.equal(formatMileageSnapshotTime('2026-08-07T07:45:06.000Z'), '15:45:06');
@@ -10,3 +10,9 @@ test('keeps historical date snapshots explicit', () => {
   assert.equal(formatMileageSnapshotTime('2026-08-06'), '2026-08-06');
   assert.equal(formatMileageSnapshotTime(null), '--:--:--');
 });
+
+test('formats assessment snapshot instants with the business date and minute', () => {
+  assert.equal(formatMileageSnapshotDateTime('2026-08-07T09:45:01.000Z'), '2026.8.7 17:45');
+  assert.equal(formatMileageSnapshotDateTime(null), '--');
+  assert.equal(formatMileageSnapshotDateTime('not-a-date'), 'not-a-date');
+});

src/modules/mileage/data-freshness.ts

@@ -12,3 +12,21 @@ export function formatMileageSnapshotTime(value: string | null): string {
     hourCycle: 'h23',
   }).format(date);
 }
+
+export function formatMileageSnapshotDateTime(value: string | null): string {
+  if (!value) return '--';
+  const date = new Date(value);
+  if (Number.isNaN(date.getTime())) return value;
+  const parts = new Intl.DateTimeFormat('zh-CN', {
+    timeZone: 'Asia/Shanghai',
+    year: 'numeric',
+    month: 'numeric',
+    day: 'numeric',
+    hour: '2-digit',
+    minute: '2-digit',
+    hour12: false,
+    hourCycle: 'h23',
+  }).formatToParts(date);
+  const part = (type: Intl.DateTimeFormatPartTypes) => parts.find(item => item.type === type)?.value || '';
+  return `${part('year')}.${part('month')}.${part('day')} ${part('hour')}:${part('minute')}`;
+}

src/modules/mileage/types.ts

@@ -64,6 +64,7 @@ export interface MonitoringData {
 export interface TargetSummary {
   id: number;
   targetName: string;
+  snapshotUpdatedAt: string | null;
   vehicleCount: number;
   totalMileagePerVehicle: number;
   annualMileagePerVehicle: number;

src/server/routes/mileage/targets.ts

@@ -26,7 +26,8 @@ app.get('/', async (c) => {
         SUM(CASE WHEN current_year_completion_rate >= 0.5 THEN 1 ELSE 0 END) as half_qualified_count,
         SUM(current_year_mileage_task) as current_year_target,
         SUM(current_year_mileage) as current_year_completed,
-        MAX(current_year_assessment_end_date) as year_end_date
+        MAX(current_year_assessment_end_date) as year_end_date,
+        DATE_FORMAT(MAX(update_time), '%Y-%m-%dT%H:%i:%s+08:00') as snapshot_updated_at
       FROM lingniu_prod.tab_mileage_assessment_vehicle WHERE is_deleted = 0
       GROUP BY target_id
     `) as [any[], unknown];
@@ -199,6 +200,7 @@ app.get('/', async (c) => {
       return {
         id: t.id,
         targetName: t.target_name,
+        snapshotUpdatedAt: s.snapshot_updated_at || null,
         vehicleCount: Number(s.total) || t.vehicle_count,
         totalMileagePerVehicle: Number(t.total_mileage_per_vehicle),
         annualMileagePerVehicle: Number(t.annual_mileage_per_vehicle),