feat(platform): surface overview consistency

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

@@ -379,6 +379,14 @@ test('shows resolved vehicle service status after topbar search', async () => {
               detail: '后端统一车辆服务状态',
               sourceCount: 2,
               onlineSourceCount: 1
+            },
+            sourceConsistency: {
+              sourceCount: 2,
+              onlineSourceCount: 1,
+              locatedSourceCount: 2,
+              mileageDeltaKm: 0,
+              sourceTimeDeltaSeconds: 0,
+              scope: 'all_sources'
             }
           },
           traceId: 'trace-test',
@@ -424,6 +432,7 @@ test('shows resolved vehicle service status after topbar search', async () => {
 
   expect(await screen.findByText('当前车辆：后端判定部分离线')).toBeInTheDocument();
   expect(screen.getByText('粤AG18312 / LB9A32A24R0LS1426')).toBeInTheDocument();
+  expect(screen.getByText('一致性：1/2 来源')).toBeInTheDocument();
   expect(fetchMock).toHaveBeenCalledWith(expect.stringContaining('/api/vehicle-service/overview?keyword=%E7%B2%A4AG18312'), undefined);
   expect(fetchMock).not.toHaveBeenCalledWith(expect.stringContaining('/api/vehicles/resolve'), undefined);
 });