diff --git a/vehicle-data-platform/apps/web/src/App.tsx b/vehicle-data-platform/apps/web/src/App.tsx
index 4a6440f0..c12f0809 100644
--- a/vehicle-data-platform/apps/web/src/App.tsx
+++ b/vehicle-data-platform/apps/web/src/App.tsx
@@ -31,12 +31,17 @@ export default function App() {
   const [currentVehicleLabel, setCurrentVehicleLabel] = useState('');
   const [currentVehicleConsistency, setCurrentVehicleConsistency] = useState<VehicleSourceConsistency | undefined>();
 
-  const loadVehicleContext = useCallback(async (keyword: string) => {
+  const loadVehicleContext = useCallback(async (keyword: string, protocol?: string) => {
     const lookupKey = keyword.trim();
     if (!lookupKey) {
       return undefined;
     }
-    const overview = await api.vehicleServiceOverview(new URLSearchParams({ keyword: lookupKey }));
+    const params = new URLSearchParams({ keyword: lookupKey });
+    const source = protocol?.trim();
+    if (source) {
+      params.set('protocol', source);
+    }
+    const overview = await api.vehicleServiceOverview(params);
     const nextKey = overview.vin || lookupKey;
     const resolved = Boolean(overview.vin);
     setCurrentVehicleStatus(overview.serviceStatus ?? serviceStatusFromOverview(overview));
@@ -62,7 +67,7 @@ export default function App() {
     if (initialRoute.page !== 'detail' || !initialRoute.keyword) {
       return;
     }
-    loadVehicleContext(initialRoute.keyword).catch((error) => {
+    loadVehicleContext(initialRoute.keyword, initialRoute.protocol).catch((error) => {
       Toast.error(error instanceof Error ? error.message : '车辆查询失败');
     });
   }, [initialRoute.keyword, initialRoute.page, loadVehicleContext]);
@@ -169,7 +174,7 @@ export default function App() {
       return;
     }
     try {
-      const context = await loadVehicleContext(lookupKey);
+      const context = await loadVehicleContext(lookupKey, nextProtocol);
       const resolved = context?.resolved;
       const nextKey = context?.nextKey ?? lookupKey;
       setActiveVin(nextKey);
diff --git a/vehicle-data-platform/apps/web/src/test/App.test.tsx b/vehicle-data-platform/apps/web/src/test/App.test.tsx
index 4ee06974..6e0cfdf1 100644
--- a/vehicle-data-platform/apps/web/src/test/App.test.tsx
+++ b/vehicle-data-platform/apps/web/src/test/App.test.tsx
@@ -2195,7 +2195,7 @@ test('opens current vehicle service from history header with current source evid
 
 test('opens vehicle service from realtime vehicles with primary source evidence', async () => {
   window.history.replaceState(null, '', '/#/realtime');
-  vi.spyOn(globalThis, 'fetch').mockImplementation(async (input) => {
+  const fetchMock = vi.spyOn(globalThis, 'fetch').mockImplementation(async (input) => {
     const path = String(input);
     if (path.includes('/api/realtime/vehicles')) {
       return {
@@ -2228,20 +2228,22 @@ test('opens vehicle service from realtime vehicles with primary source evidence'
         })
       } as Response;
     }
-    if (path.includes('/api/vehicles/resolve')) {
+    if (path.includes('/api/vehicle-service/overview')) {
       return {
         ok: true,
         json: async () => ({
           data: {
-            lookupKey: 'VIN-MQTT-001',
-            resolved: true,
             vin: 'VIN-MQTT-001',
             plate: '川AHTWO1',
-            phone: '',
-            oem: '宇通',
-            protocols: ['GB32960', 'YUTONG_MQTT'],
-            online: true,
-            lastSeen: '2026-07-03 20:12:10'
+            sourceCount: 2,
+            onlineSourceCount: 1,
+            coverageStatus: 'online',
+            primaryProtocol: 'YUTONG_MQTT',
+            lastSeen: '2026-07-03 20:12:10',
+            historyCount: 0,
+            rawCount: 0,
+            mileageCount: 0,
+            qualityIssueCount: 0
           },
           traceId: 'trace-test',
           timestamp: 1783094400000
@@ -2266,6 +2268,7 @@ test('opens vehicle service from realtime vehicles with primary source evidence'
   await waitFor(() => {
     expect(window.location.hash).toBe('#/detail?keyword=VIN-MQTT-001&protocol=YUTONG_MQTT');
   });
+  expect(fetchMock).toHaveBeenCalledWith(expect.stringContaining('/api/vehicle-service/overview?keyword=VIN-MQTT-001&protocol=YUTONG_MQTT'), undefined);
 });
 
 test('shows canonical service status in realtime vehicles', async () => {