feat(events): unify registration checkout and receipts

tests/registration-hub-display.test.mjs

@@ -0,0 +1,58 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import {
+  getRegistrationHubGate,
+  getRegistrationHubDisplayState,
+  getRegistrationHubGateCopy,
+  getFinalPriceToman,
+  normalizeCouponAmounts,
+} from "../src/lib/registration-hub-display.ts";
+
+const now = Date.parse("2026-10-01T06:00:00.000Z");
+
+test("closed and cancelled events use the registration-ended presentation", () => {
+  const closedRegistration = getRegistrationHubGate({
+    status: "published",
+    registration_end_date: "2026-09-30T00:00:00.000Z",
+  }, now);
+  const cancelledEvent = getRegistrationHubGate({ status: "cancelled" }, now);
+
+  assert.equal(closedRegistration, "registration_ended");
+  assert.equal(cancelledEvent, "registration_ended");
+  assert.deepEqual(getRegistrationHubGateCopy(closedRegistration), {
+    status: "پایان زمان ثبت‌نام",
+    title: "پایان مهلت ثبت‌نام",
+    subtitle: "",
+  });
+});
+
+test("full events use the capacity-complete presentation", () => {
+  const gate = getRegistrationHubGate({
+    status: "published",
+    capacity: 5,
+    registration_count: 5,
+  }, now);
+
+  assert.equal(gate, "capacity_full");
+  assert.deepEqual(getRegistrationHubGateCopy(gate), {
+    status: "تکمیل ظرفیت",
+    title: "ظرفیت رویداد تکمیل شده",
+    subtitle: "",
+  });
+});
+
+test("legacy unresolved checkout uses the unknown-payment presentation", () => {
+  assert.equal(getRegistrationHubDisplayState("legacy_pending"), "verification_pending");
+  assert.equal(getRegistrationHubDisplayState("paid_success"), "paid_success");
+});
+
+test("coupon API amounts are converted from rial to toman for display", () => {
+  assert.deepEqual(normalizeCouponAmounts({ discount_amount: 100_000, final_price: 1_150_000 }), {
+    discount_amount: 10_000,
+    final_price: 115_000,
+  });
+});
+
+test("final event price is converted from rial to toman when no coupon is applied", () => {
+  assert.equal(getFinalPriceToman(1_250_000), 125_000);
+});