Fix type error in flight-details integration test

Use ISimpleFlight union type for setupWithFlight parameter to accept
both IDirectFlight and IMultiLegFlight fixtures.

tests/integration/online-board/flight-details.test.tsx

@@ -10,7 +10,7 @@
 import { describe, it, expect, vi, beforeEach } from "vitest";
 import { render, screen } from "@testing-library/react";
 import { OnlineBoardDetailsPage } from "@/features/online-board/components/OnlineBoardDetailsPage.js";
-import type { IParsedFlightId } from "@/features/online-board/types.js";
+import type { IParsedFlightId, ISimpleFlight } from "@/features/online-board/types.js";
 import { DIRECT_FLIGHT, MULTI_LEG_FLIGHT } from "./fixtures.js";
 
 // ---------------------------------------------------------------------------
@@ -49,7 +49,7 @@ const FLIGHT_ID: IParsedFlightId = {
   date: "20250115",
 };
 
-function setupWithFlight(flight = DIRECT_FLIGHT) {
+function setupWithFlight(flight: ISimpleFlight = DIRECT_FLIGHT) {
   mockUseFlightDetails.mockReturnValue({
     flight,
     loading: false,