feat(platform): highlight unified vehicle service posture

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

@@ -44,6 +44,15 @@ function formatCount(value?: number | null) {
   return value == null ? '0' : value.toLocaleString();
 }
 
+function vehicleServiceOnlineText(serviceSummary: VehicleServiceSummary | null, summary: DashboardSummary | null) {
+  const onlineVehicles = serviceSummary?.onlineVehicles ?? summary?.onlineVehicles;
+  const totalVehicles = serviceSummary?.totalVehicles;
+  if (onlineVehicles == null || totalVehicles == null) {
+    return '未接入';
+  }
+  return `${onlineVehicles.toLocaleString()} / ${totalVehicles.toLocaleString()} 在线`;
+}
+
 function formatProtocolRate(row: ProtocolStat) {
   if (!Number.isFinite(row.total) || row.total <= 0) {
     return '0%';
@@ -169,6 +178,16 @@ export function Dashboard({ onOpenVehicle, onOpenQuality, onOpenVehicles }: { on
             </Card>
           ))}
         </div>
+        <Card bordered title="统一车辆服务" style={{ marginBottom: 16 }}>
+          <Space wrap>
+            <Tag color="blue">{vehicleServiceOnlineText(serviceSummary, summary)}</Tag>
+            <Tag color="green">{formatCount(serviceSummary?.multiSourceVehicles)} 多源覆盖</Tag>
+            <Tag color={(summary?.issueVehicles ?? 0) > 0 ? 'orange' : 'green'}>
+              {formatCount(summary?.issueVehicles)} 质量关注
+            </Tag>
+            <Tag color={(summary?.kafkaLag ?? 0) > 0 ? 'orange' : 'green'}>Kafka Lag {formatLag(summary?.kafkaLag)}</Tag>
+          </Space>
+        </Card>
         <Row gutter={16}>
           <Col span={8}>
             <Card title="车辆服务状态" bordered>