Spirit ceased operations, so the fetchSpiritStatus path and all NK
references are dead code. Pulled out:
- AirlineLoadService: drop `case "NK"` from the router, delete
fetchSpiritStatus (the GetFlightInfoBI POST that was returning 403
even after our APIM key was accepted).
- FlightLoadDetailView: drop the `schedule.airline.iata == "NK"` branch
and the spiritUnavailableView placeholder.
- FlightLoad model: update the airlineCode comment.
- AirlineLoadIntegrationTests: remove test_NK_spirit and drop "NK" from
statusOnlyAirlines / knownDailyFlights fallback table.
- AIRLINE_INTEGRATION_GUIDE.md: tombstone the Spirit section and remove
it from the cheat-sheets and recommendations.
Test suite now: 6 airlines passing (AA, AS, B6, EK, KE, UA), 1 skipped
(XE — WKWebView host required), 0 failures, runs in ~10s.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Trey T
4a939340a2