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

skills/flight-finder/src/price-normalization.ts

@@ -0,0 +1,36 @@
+export type NormalizePriceInput = {
+  amount: number;
+  currency: string;
+  exchangeRates?: Record<string, number>;
+};
+
+export type NormalizedPrice = {
+  currency: "USD";
+  amountUsd: number;
+  notes: string[];
+};
+
+export function normalizePriceToUsd(
+  input: NormalizePriceInput
+): NormalizedPrice {
+  const currency = input.currency.trim().toUpperCase();
+  if (currency === "USD") {
+    return {
+      currency: "USD",
+      amountUsd: input.amount,
+      notes: ["Price already in USD."]
+    };
+  }
+
+  const rate = input.exchangeRates?.[currency];
+  if (typeof rate !== "number" || !Number.isFinite(rate) || rate <= 0) {
+    throw new Error(`Missing usable exchange rate for ${currency}.`);
+  }
+
+  const amountUsd = Math.round(input.amount * rate * 100) / 100;
+  return {
+    currency: "USD",
+    amountUsd,
+    notes: [`Converted ${currency} to USD using rate ${rate}.`]
+  };
+}