test(public-api): the other stats suites stub next_trip too

server/tests/e2e/public-api.e2e.test.ts

@@ -143,6 +143,7 @@ const STATS = {
     totalDistanceKm: 1234,
   }),
   lastTrip: () => null,
+  nextTrip: () => null,
 };
 
 describe('Public API v1 e2e (real guard + real SQL)', () => {

server/tests/unit/nest/public-api-scopes.test.ts

@@ -143,6 +143,7 @@ function statsController() {
         totalTrips: 1, totalDays: 2, totalPlaces: 3, totalDistanceKm: 4,
       })),
       lastTrip: vi.fn(() => null),
+      nextTrip: vi.fn(() => null),
     } as unknown as AtlasService,
     new RateLimitService(),
   );