feat(flight-finder): implement milestone M2 - report workflow and delivery gates

skills/flight-finder/src/request-normalizer.ts

@@ -6,6 +6,7 @@ import type {
   FlightSearchPreferences,
   NormalizedFlightReportRequest
 } from "./types.js";
+import { isPlausibleEmail, normalizeMarketCountry } from "./input-validation.js";
 
 const DEFAULT_PREFERENCES: FlightSearchPreferences = {
   preferOneStop: true,
@@ -34,30 +35,6 @@ function uniqueStrings(values: Array<string | null | undefined> | undefined): st
   return cleaned.length ? Array.from(new Set(cleaned)) : undefined;
 }
 
-function normalizeMarketCountry(value: string | null | undefined): string | null | undefined {
-  const cleaned = cleanString(value);
-  if (!cleaned) {
-    return undefined;
-  }
-
-  const normalized = cleaned.toUpperCase();
-  if (!/^[A-Z]{2}$/.test(normalized)) {
-    throw new Error(
-      `Invalid marketCountry "${value}". Use an ISO 3166-1 alpha-2 uppercase country code such as "TH" or "DE".`
-    );
-  }
-
-  return normalized;
-}
-
-function isPlausibleEmail(value: string | null | undefined): boolean {
-  if (!value) {
-    return false;
-  }
-
-  return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(value);
-}
-
 function normalizePassengerGroups(
   groups: FlightReportRequestDraft["passengerGroups"]
 ): FlightPassengerGroup[] {