fix(payment): default nullable first recharge offer

src/data/dto/payment/__tests__/payment_plan.test.ts

@@ -114,4 +114,22 @@ describe("PaymentPlansResponse", () => {
       promotionType: "first_recharge_half_price",
     });
   });
+
+  it("defaults nullable first recharge offer metadata", () => {
+    const response = PaymentPlansResponse.from({
+      isFirstRecharge: true,
+      firstRechargeOffer: {
+        enabled: null,
+        type: null,
+        discountPercent: null,
+      },
+      plans: [],
+    });
+
+    expect(response.firstRechargeOffer).toEqual({
+      enabled: false,
+      type: "",
+      discountPercent: 0,
+    });
+  });
 });

src/data/schemas/payment/payment_plans_response.ts

@@ -3,12 +3,13 @@
  */
 import { z } from "zod";
 
+import { booleanOrFalse, numberOrZero, stringOrEmpty } from "../nullable-defaults";
 import { PaymentPlanSchema } from "./payment_plan";
 
 export const FirstRechargeOfferSchema = z.object({
-  enabled: z.boolean(),
-  type: z.string(),
-  discountPercent: z.number(),
+  enabled: booleanOrFalse,
+  type: stringOrEmpty,
+  discountPercent: numberOrZero,
 });
 
 export const PaymentPlansResponseSchema = z.object({