fix(platform): align topbar missing source status

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

@@ -417,6 +417,7 @@ function normalizeHistoryFilterValues(filters: Record<string, unknown> = {}): Re
 function serviceStatusFromOverview(overview: VehicleServiceOverview): VehicleServiceStatus {
   const sourceCount = overview.sourceCount;
   const onlineSourceCount = overview.onlineSourceCount;
+  const missingProtocols = overview.sourceConsistency?.missingProtocols ?? [];
   if (!overview.vin) {
     return {
       status: 'identity_required',
@@ -447,6 +448,16 @@ function serviceStatusFromOverview(overview: VehicleServiceOverview): VehicleSer
       onlineSourceCount
     };
   }
+  if (missingProtocols.length > 0) {
+    return {
+      status: 'degraded',
+      severity: 'warning',
+      title: '来源不完整',
+      detail: `${onlineSourceCount}/${sourceCount} 个来源在线，车辆服务可用但缺少 ${missingProtocols.join('、')} 来源。`,
+      sourceCount,
+      onlineSourceCount
+    };
+  }
   if (onlineSourceCount < sourceCount) {
     return {
       status: 'degraded',