[web] Remove SubscriptionFormatters, format subscription dates in the frontend (#36409) (#36476)

* Reapply "[web] Remove SubscriptionFormatters, format subscription dates in the…"

This reverts commit 2939e71e5b919529cbb8a602916d5f597d117792.

* Fixup after rename conflict: `nextPaymentDueDate`->`periodEnd`

GitOrigin-RevId: c024a3a2cd08c1f8f9d4c99f9ba6f018d334439e

services/web/test/unit/src/Subscription/SubscriptionFormatters.test.mjs

@@ -1,30 +0,0 @@
-import { describe, expect, it } from 'vitest'
-import SubscriptionFormatters from '../../../../app/src/Features/Subscription/SubscriptionFormatters.mjs'
-
-describe('SubscriptionFormatters', function () {
-  describe('formatDateTime', function () {
-    it('should return null if no date', function () {
-      const result = SubscriptionFormatters.formatDateTime(null)
-      expect(result).to.equal(null)
-    })
-
-    it('should format date with time', function () {
-      const date = new Date(1639904485000)
-      const result = SubscriptionFormatters.formatDateTime(date)
-      expect(result).to.equal('December 19th, 2021 9:01 AM UTC')
-    })
-  })
-
-  describe('formatDate', function () {
-    it('should return null if no date', function () {
-      const result = SubscriptionFormatters.formatDate(null)
-      expect(result).to.equal(null)
-    })
-
-    it('should format date', function () {
-      const date = new Date(1639904485000)
-      const result = SubscriptionFormatters.formatDate(date)
-      expect(result).to.equal('December 19th, 2021')
-    })
-  })
-})

services/web/test/unit/src/Subscription/SubscriptionViewModelBuilder.test.mjs

@@ -745,12 +745,10 @@ describe('SubscriptionViewModelBuilder', function () {
             },
           ],
           totalLicenses: 0,
-          nextPaymentDueAt: 'February 20th, 2025 12:00 PM UTC',
-          nextPaymentDueDate: 'February 20th, 2025',
+          periodEnd: new Date('2025-02-20T12:00:00.000Z'),
           currency: 'EUR',
           planPrice: 13,
           state: 'active',
-          trialEndsAtFormatted: null,
           trialEndsAt: null,
           activeCoupons: [],
           accountEmail: 'example@example.com',