[web] Remove SubscriptionFormatters, format subscription dates in the frontend (#36409)

* [web] Remove SubscriptionFormatters, format subscription dates in the frontend

Replace the server-formatted nextPaymentDueAt/nextPaymentDueDate/
trialEndsAtFormatted fields with the raw periodEnd date and format in
the React dashboard (same strings as before, English + UTC). Also
consolidate hand-rolled trial checks onto isInFreeTrial /
SubscriptionHelper.isInTrial.

* [web] Remove the now-unused dateformat dependency

* [web] Address review: payment-dates unit test, UTC dates in acceptance test

Add a dedicated unit test asserting the exact formatted strings from
formatPaymentDate/formatPaymentDateTime, and use explicit UTC timestamps
in the SubscriptionDashboard acceptance fixtures instead of
local-timezone Date constructors.

GitOrigin-RevId: 16ac4f1098b14ef9f1478d22cf39c1357ead7dea

services/web/frontend/js/features/subscription/components/dashboard/pause-modal.tsx

@@ -17,6 +17,7 @@ import * as eventTracking from '../../../../infrastructure/event-tracking'
 import PauseDuck from '../../images/pause-duck.svg'
 import GenericErrorAlert from './generic-error-alert'
 import { PaidSubscription } from '../../../../../../types/subscription/dashboard/subscription'
+import isInFreeTrial from '../../util/is-in-free-trial'
 
 const pauseMonthDurationOptions = [1, 2, 3]
 
@@ -39,10 +40,7 @@ export default function PauseSubscriptionModal() {
     const subscription = personalSubscription as PaidSubscription
     eventTracking.sendMB('subscription-page-cancel-button-click', {
       plan_code: subscription?.planCode,
-      is_trial:
-        subscription?.payment.trialEndsAtFormatted &&
-        subscription?.payment.trialEndsAt &&
-        new Date(subscription.payment.trialEndsAt).getTime() > Date.now(),
+      is_trial: isInFreeTrial(subscription?.payment.trialEndsAt),
     })
     setShowCancellation(true)
   }

services/web/frontend/js/features/subscription/components/dashboard/states/active/active.tsx

@@ -30,6 +30,10 @@ import { useLocation } from '@/shared/hooks/use-location'
 import { FlashMessage } from '@/features/subscription/components/dashboard/states/active/flash-message'
 import Notification from '@/shared/components/notification'
 import { PendingPlanChange } from './pending-plan-change'
+import {
+  formatPaymentDate,
+  formatPaymentDateTime,
+} from '../../../../util/payment-dates'
 
 export function ActiveSubscription({
   subscription,
@@ -138,7 +142,7 @@ export function ActiveSubscription({
       <p className="mb-1" data-testid="renews-on">
         <Trans
           i18nKey="renews_on"
-          values={{ date: subscription.payment.nextPaymentDueDate }}
+          values={{ date: formatPaymentDate(subscription.payment.periodEnd) }}
           shouldUnescape
           tOptions={{ interpolation: { escapeValue: true } }}
           components={[<strong />]} // eslint-disable-line react/jsx-key
@@ -198,13 +202,12 @@ export function ActiveSubscription({
       <hr />
       <h2 className="h3 fw-bold">{t('plan')}</h2>
       <h3 className="h5 mt-0 mb-1 fw-bold">{planName}</h3>
-      {isInFreeTrial(subscription.payment.trialEndsAt) &&
-        subscription.payment.trialEndsAtFormatted && (
-          <TrialEnding
-            trialEndsAtFormatted={subscription.payment.trialEndsAtFormatted}
-            className="mb-1"
-          />
-        )}
+      {isInFreeTrial(subscription.payment.trialEndsAt) && (
+        <TrialEnding
+          trialEndsAt={subscription.payment.trialEndsAt}
+          className="mb-1"
+        />
+      )}
       {subscription.payment.totalLicenses > 0 && (
         <p className="mb-1" data-testid="plan-licenses">
           {isLegacyPlan &&
@@ -245,7 +248,9 @@ export function ActiveSubscription({
               i18nKey="your_subscription_will_pause_on"
               values={{
                 planName: subscription.plan.name,
-                pauseDate: subscription.payment.nextPaymentDueAt,
+                pauseDate: formatPaymentDateTime(
+                  subscription.payment.periodEnd
+                ),
                 reactivationDate: getFormattedRenewalDate(),
               }}
               shouldUnescape

services/web/frontend/js/features/subscription/components/dashboard/states/active/add-ons.tsx

@@ -22,6 +22,7 @@ import sparkle from '@/shared/svgs/sparkle.svg'
 import { PaidSubscription } from '../../../../../../../../types/subscription/dashboard/subscription'
 import { LICENSE_ADD_ON } from '@/features/group-management/components/upgrade-subscription/upgrade-subscription-plan-details'
 import WritefullManagedBundleAddOn from './change-plan/modals/writefull-bundle-management-modal'
+import { formatPaymentDate } from '../../../../util/payment-dates'
 
 type AddOnsProps = {
   subscription: PaidSubscription
@@ -189,7 +190,7 @@ function AddOns({
             )
           }
           displayPrice={addOnsDisplayPrices[addOn.addOnCode]}
-          nextBillingDate={subscription.payment.nextPaymentDueDate}
+          nextBillingDate={formatPaymentDate(subscription.payment.periodEnd)!}
         />
       ))}
       {hasAiAssistViaWritefull && <WritefullManagedBundleAddOn />}

services/web/frontend/js/features/subscription/components/dashboard/states/active/cancel-subscription-button.tsx

@@ -6,6 +6,7 @@ import { PaidSubscription } from '../../../../../../../../types/subscription/das
 import { useFeatureFlag } from '@/shared/context/split-test-context'
 import { useLocation } from '@/shared/hooks/use-location'
 import { stripHasSubscription } from '../../../../data/subscription-url'
+import isInFreeTrial from '../../../../util/is-in-free-trial'
 
 export function CancelSubscriptionButton() {
   const { t } = useTranslation()
@@ -18,10 +19,7 @@ export function CancelSubscriptionButton() {
   } = useSubscriptionDashboardContext()
 
   const subscription = personalSubscription as PaidSubscription
-  const isInTrial =
-    subscription?.payment.trialEndsAtFormatted &&
-    subscription?.payment.trialEndsAt &&
-    new Date(subscription.payment.trialEndsAt).getTime() > Date.now()
+  const isInTrial = isInFreeTrial(subscription?.payment.trialEndsAt)
   const hasPendingOrActivePause =
     subscription.payment.state === 'paused' ||
     (subscription.payment.state === 'active' &&

services/web/frontend/js/features/subscription/components/dashboard/states/active/flash-message.tsx

@@ -4,6 +4,7 @@ import { Trans, useTranslation } from 'react-i18next'
 import { PaidSubscription } from '../../../../../../../../types/subscription/dashboard/subscription'
 import { useEffect, useState } from 'react'
 import { useLocation } from '@/shared/hooks/use-location'
+import { formatPaymentDateTime } from '../../../../util/payment-dates'
 
 export type FlashMessageName = 'paused' | 'unpaused' | 'error'
 
@@ -36,7 +37,9 @@ export function FlashMessage() {
             <Trans
               i18nKey="your_subscription_will_pause_on_short"
               values={{
-                pauseDate: subscription.payment.nextPaymentDueAt,
+                pauseDate: formatPaymentDateTime(
+                  subscription.payment.periodEnd
+                ),
               }}
               shouldUnescape
               tOptions={{ interpolation: { escapeValue: true } }}

services/web/frontend/js/features/subscription/components/dashboard/states/active/subscription-remainder.tsx

@@ -1,5 +1,10 @@
 import { Trans } from 'react-i18next'
 import { PaidSubscription } from '../../../../../../../../types/subscription/dashboard/subscription'
+import isInFreeTrial from '../../../../util/is-in-free-trial'
+import {
+  formatPaymentDate,
+  formatPaymentDateTime,
+} from '../../../../util/payment-dates'
 
 type SubscriptionRemainderProps = {
   subscription: PaidSubscription
@@ -10,14 +15,11 @@ function SubscriptionRemainder({
   subscription,
   hideTime,
 }: SubscriptionRemainderProps) {
-  const stillInATrial =
-    subscription.payment.trialEndsAtFormatted &&
-    subscription.payment.trialEndsAt &&
-    new Date(subscription.payment.trialEndsAt).getTime() > Date.now()
+  const stillInATrial = isInFreeTrial(subscription.payment.trialEndsAt)
 
   const terminationDate = hideTime
-    ? subscription.payment.nextPaymentDueDate
-    : subscription.payment.nextPaymentDueAt
+    ? formatPaymentDate(subscription.payment.periodEnd)
+    : formatPaymentDateTime(subscription.payment.periodEnd)
   return stillInATrial ? (
     <Trans
       i18nKey="subscription_will_remain_active_until_end_of_trial_period_x"

services/web/frontend/js/features/subscription/components/dashboard/states/active/trial-ending.tsx

@@ -1,19 +1,17 @@
 import { Trans } from 'react-i18next'
+import { formatPaymentDateTime } from '../../../../util/payment-dates'
 
 type TrialEndingProps = {
-  trialEndsAtFormatted: string
+  trialEndsAt: string
   className?: string
 }
 
-export function TrialEnding({
-  trialEndsAtFormatted,
-  className,
-}: TrialEndingProps) {
+export function TrialEnding({ trialEndsAt, className }: TrialEndingProps) {
   return (
     <p className={className} data-testid="trial-ending">
       <Trans
         i18nKey="youre_on_free_trial_which_ends_on"
-        values={{ date: trialEndsAtFormatted }}
+        values={{ date: formatPaymentDateTime(trialEndsAt) }}
         shouldUnescape
         tOptions={{ interpolation: { escapeValue: true } }}
         components={[

services/web/frontend/js/features/subscription/components/dashboard/states/canceled.tsx

@@ -6,6 +6,7 @@ import {
 } from '../../../data/add-on-codes'
 import ReactivateSubscription from '../reactivate-subscription'
 import OLButton from '@/shared/components/ol/ol-button'
+import { formatPaymentDateTime } from '../../../util/payment-dates'
 
 export function CanceledSubscription({
   subscription,
@@ -48,7 +49,9 @@ export function CanceledSubscription({
         <Trans
           i18nKey="subscription_canceled_and_terminate_on_x"
           values={{
-            terminateDate: subscription.payment.nextPaymentDueAt,
+            terminateDate: formatPaymentDateTime(
+              subscription.payment.periodEnd
+            ),
           }}
           shouldUnescape
           tOptions={{ interpolation: { escapeValue: true } }}

services/web/frontend/js/features/subscription/components/dashboard/subscription-dashboard.tsx

@@ -17,6 +17,7 @@ import Notification from '@/shared/components/notification'
 import WritefullManagedBundleAddOn from './states/active/change-plan/modals/writefull-bundle-management-modal'
 import RedirectAlerts from './redirect-alerts'
 import { PaidSubscription } from '@ol-types/subscription/dashboard/subscription'
+import { formatPaymentDate } from '../../util/payment-dates'
 
 function SubscriptionDashboard() {
   const { t } = useTranslation()
@@ -42,7 +43,7 @@ function SubscriptionDashboard() {
     subscription &&
     subscription.pendingPlan &&
     subscription.pendingPlan.name !== subscription.plan.name
-  const nextPaymentDueDate = subscription?.payment?.nextPaymentDueDate
+  const nextPaymentDueDate = formatPaymentDate(subscription?.payment?.periodEnd)
 
   return (
     <div className="container">