feat(platform): expose realtime service status

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

@@ -288,6 +288,66 @@ test('keeps primary protocol when opening vehicle service from realtime vehicles
   });
 });
 
+test('shows canonical service status in realtime vehicles', async () => {
+  window.history.replaceState(null, '', '/#/realtime');
+  vi.spyOn(globalThis, 'fetch').mockImplementation(async (input) => {
+    const path = String(input);
+    if (path.includes('/api/realtime/vehicles')) {
+      return {
+        ok: true,
+        json: async () => ({
+          data: {
+            items: [{
+              vin: 'VIN-RT-DEGRADED',
+              plate: '粤ART001',
+              phone: '',
+              oem: 'G7s',
+              protocols: ['GB32960'],
+              sourceCount: 1,
+              onlineSourceCount: 1,
+              online: true,
+              primaryProtocol: 'GB32960',
+              longitude: 113.2,
+              latitude: 23.1,
+              speedKmh: 30,
+              socPercent: 78,
+              totalMileageKm: 119925,
+              lastSeen: '2026-07-03 20:12:10',
+              bindingStatus: 'bound',
+              serviceStatus: {
+                status: 'degraded',
+                severity: 'warning',
+                title: '部分来源离线',
+                detail: '由实时车辆 API 统一判定',
+                sourceCount: 2,
+                onlineSourceCount: 1
+              }
+            }],
+            total: 1,
+            limit: 50,
+            offset: 0
+          },
+          traceId: 'trace-test',
+          timestamp: 1783094400000
+        })
+      } as Response;
+    }
+    return {
+      ok: true,
+      json: async () => ({
+        data: { items: [], total: 0, limit: 10, offset: 0 },
+        traceId: 'trace-test',
+        timestamp: 1783094400000
+      })
+    } as Response;
+  });
+
+  render(<App />);
+
+  expect(await screen.findByText('VIN-RT-DEGRADED')).toBeInTheDocument();
+  expect(screen.getByText('部分来源离线')).toBeInTheDocument();
+});
+
 test('shows vehicle service status in vehicle list', async () => {
   window.history.replaceState(null, '', '/#/vehicles');
   vi.spyOn(globalThis, 'fetch').mockImplementation(async (input) => {