Add period-based license keys alongside fixed expiry dates.

New keys default to validDays with countdown starting on first activation; existing expiresAtSec keys behave unchanged.

Co-authored-by: Cursor <cursoragent@cursor.com>

test/licenseLogic.test.mjs

@@ -0,0 +1,67 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+
+import {
+  DEFAULT_VALID_DAYS,
+  ensurePeriodActivated,
+  enrichLicenseEntry,
+  getEffectiveExpSec,
+  isFixedKey,
+  isPeriodKey,
+  parseProductKeyExpiry,
+  resolveTokenExp,
+  SECONDS_PER_DAY,
+} from '../lib/licenseLogic.mjs';
+
+void test('parseProductKeyExpiry defaults to period', () => {
+  const r = parseProductKeyExpiry({});
+  assert.equal(r.ok, true);
+  assert.equal(r.validDays, DEFAULT_VALID_DAYS);
+});
+
+void test('parseProductKeyExpiry rejects conflicting expiry fields', () => {
+  const r = parseProductKeyExpiry({ expiresAtSec: 100, validDays: 30 });
+  assert.equal(r.ok, false);
+  assert.equal(r.error, 'conflicting_expiry');
+});
+
+void test('ensurePeriodActivated sets exp once for period keys', () => {
+  const pk = { validDays: 10 };
+  const first = ensurePeriodActivated(pk, 1000);
+  assert.equal(first.changed, true);
+  assert.equal(first.exp, 1000 + 10 * SECONDS_PER_DAY);
+  assert.equal(pk.activatedAtSec, 1000);
+
+  const second = ensurePeriodActivated(pk, 5000);
+  assert.equal(second.changed, false);
+  assert.equal(second.exp, first.exp);
+});
+
+void test('resolveTokenExp for fixed and period keys', () => {
+  const fixed = { expiresAtSec: 9999 };
+  assert.equal(resolveTokenExp(fixed, 100), 9999);
+  assert.ok(isFixedKey(fixed));
+
+  const period = { validDays: 7, licenseExpSec: 7000 };
+  assert.equal(resolveTokenExp(period, 100), 7000);
+  assert.ok(isPeriodKey(period));
+});
+
+void test('enrichLicenseEntry exposes expiry metadata', () => {
+  const fixed = enrichLicenseEntry(
+    { key: 'k', sub: 's', pid: 'p', maxDevices: 1, expiresAtSec: 123 },
+    [],
+    false,
+  );
+  assert.equal(fixed.expiryMode, 'fixed');
+  assert.equal(fixed.effectiveExpSec, 123);
+
+  const period = enrichLicenseEntry(
+    { key: 'k', sub: 's', pid: 'p', maxDevices: 1, validDays: 30 },
+    [],
+    false,
+  );
+  assert.equal(period.expiryMode, 'period');
+  assert.equal(period.effectiveExpSec, null);
+  assert.equal(getEffectiveExpSec({ validDays: 30, licenseExpSec: 555 }), 555);
+});