perf(web): reuse locale formatters

vehicle-data-platform/apps/web/src/v2/pages/VehiclePage.tsx

@@ -11,15 +11,16 @@ import { usePlatformSession } from '../auth/AuthGate';
 import { canAdminister } from '../auth/session';
 import { QUERY_MEMORY } from '../queryPolicy';
 import { formatTelemetryTime, formatTelemetryValue, telemetryQualityLabel } from '../domain/telemetry';
+import { formatZhNumber } from '../domain/formatters';
 import { parseVehicleProfileSyncCSV, vehicleProfileSyncCSVHeader } from '../domain/profileSync';
 import { FleetMap } from '../map/FleetMap';
 import { InlineError, PageLoading } from '../shared/AsyncState';
 
 function fmt(value?: string) { return value?.trim() || '—'; }
-function metric(value: number | undefined, fallback = '—') { return typeof value === 'number' && Number.isFinite(value) ? new Intl.NumberFormat('zh-CN', { maximumFractionDigits: 1 }).format(value) : fallback; }
+function metric(value: number | undefined, fallback = '—') { return typeof value === 'number' && Number.isFinite(value) ? formatZhNumber(value, 1) : fallback; }
 function timeOnly(value?: string) { if (!value) return '—'; const parts = value.split(' '); return parts[parts.length - 1] || value; }
 function issueTone(issue: QualityIssueRow) { return issue.severity === 'error' ? 'error' : 'warning'; }
-function durationHours(seconds?: number | null) { return seconds == null ? '—' : `${new Intl.NumberFormat('zh-CN', { maximumFractionDigits: 1 }).format(seconds / 3600)} 小时`; }
+function durationHours(seconds?: number | null) { return seconds == null ? '—' : `${formatZhNumber(seconds / 3600, 1)} 小时`; }
 function localDateTime(value?: string) { return value ? value.slice(0, 16) : ''; }
 const operationStatusLabels = { unknown: '待维护', active: '运营中', inactive: '停运', maintenance: '维保中', retired: '已退役' } as const;