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">