feat(payment): implement coffee tip plans and update payment flow

src/data/services/api/__tests__/payment_api.test.ts

@@ -0,0 +1,51 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+const httpClientMock = vi.hoisted(() => vi.fn());
+
+vi.mock("../http_client", () => ({
+  httpClient: httpClientMock,
+}));
+
+import { PaymentApi } from "../payment_api";
+
+describe("PaymentApi", () => {
+  beforeEach(() => {
+    httpClientMock.mockReset();
+  });
+
+  it("loads public coffee tip plans from the dedicated endpoint", async () => {
+    httpClientMock.mockResolvedValue({
+      success: true,
+      data: {
+        plans: [
+          {
+            planId: "tip_coffee_usd_19_99",
+            planName: "Large Coffee",
+            orderType: "tip",
+            tipType: "coffee_large",
+            description: "Buy Elio a large coffee",
+            amountCents: 1999,
+            currency: "USD",
+            autoRenew: false,
+            isFirstRechargeOffer: false,
+            firstRechargeDiscountPercent: 0,
+          },
+        ],
+      },
+    });
+
+    const response = await new PaymentApi().getTipPlans();
+
+    expect(httpClientMock).toHaveBeenCalledWith("/api/payment/tip-plans");
+    expect(response.toJson()).toEqual({
+      plans: [
+        {
+          planId: "tip_coffee_usd_19_99",
+          planName: "Large Coffee",
+          amountCents: 1999,
+          currency: "USD",
+        },
+      ],
+    });
+  });
+});