[web] Change plans order in Change Plan modal (#34096)

* [web] Order plans in Change Plan modal consistently

Reorder the plans returned by `buildPlansListForSubscriptionDash` so the
Subscription page "Change plan" modal lists them top-to-bottom as:

  1. Student annual
  2. Student monthly
  3. Standard monthly
  4. Standard annual
  5. Pro monthly
  6. Pro annual

Previously `buildPlansList` produced three per-period buckets which the
dash function concatenated, giving an order that flipped per family.
Replace that with an explicit `CHANGE_PLAN_MODAL_PLAN_CODES` list so the
order matches the Design QA spec at a glance. The now-unused
`studentAccounts`, `individualMonthlyPlans`, `individualAnnualPlans`,
`groupMonthlyPlans`, and `groupAnnualPlans` buckets are dropped from
`buildPlansList` (no other callers).

Closes #34024

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* [web] Update personal-plan acceptance test for new buildPlansList shape

The previous test asserted `buildPlansList().individualMonthlyPlans`,
which no longer exists after the change-plan modal reorder dropped the
per-period buckets. Move the assertion to
`buildPlansListForSubscriptionDash()`, which is where the personal-plan
exclusion is now enforced (via `CHANGE_PLAN_MODAL_PLAN_CODES`).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* [web] Drop now-dead client-side plan filter

`IndividualPlansTable` used to filter out `paid-personal`,
`paid-personal-annual` and `institutional_commons` defensively because
the old `buildPlansListForSubscriptionDash` returned every non-group
plan that wasn't `hideFromUsers`. The previous commit pins the modal to
an explicit six-plan list (`CHANGE_PLAN_MODAL_PLAN_CODES`), so none of
those plan codes ever reach the frontend and the filter is dead. Remove
it and the now-unused `useMemo` import.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* Revert "[web] Drop now-dead client-side plan filter"

This reverts commit 83e8448f2cfa2c68e44b749d5a2bc350a7443c6d.

We'll do that in a later cleanup

* Swap "Student monthly" and "Student annual" for consistency

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
GitOrigin-RevId: 046a235e14e7ad6622288f5a5a723f5a4f7f14da

services/web/app/src/Features/Subscription/SubscriptionViewModelBuilder.mjs

@@ -517,39 +517,19 @@ function buildPlansList(currentPlan, isInTrial) {
     )
   }
 
-  result.studentAccounts = _.filter(
-    plans,
-    plan => plan.planCode.indexOf('student') !== -1
-  )
-
-  result.groupMonthlyPlans = _.filter(
-    plans,
-    plan => plan.groupPlan && !plan.annual
-  )
-
-  result.groupAnnualPlans = _.filter(
-    plans,
-    plan => plan.groupPlan && plan.annual
-  )
-
-  result.individualMonthlyPlans = _.filter(
-    plans,
-    plan =>
-      !plan.groupPlan &&
-      !plan.annual &&
-      plan.planCode !== 'personal' && // Prevent the personal plan from appearing on the change-plans page
-      plan.planCode.indexOf('student') === -1
-  )
-
-  result.individualAnnualPlans = _.filter(
-    plans,
-    plan =>
-      !plan.groupPlan && plan.annual && plan.planCode.indexOf('student') === -1
-  )
-
   return result
 }
 
+// Plan codes shown in the subscription dashboard "Change plan" modal,
+const CHANGE_PLAN_MODAL_PLAN_CODES = [
+  'student',
+  'student-annual',
+  'collaborator',
+  'collaborator-annual',
+  'professional',
+  'professional-annual',
+]
+
 function _isPlanEqualOrBetter(planA, planB) {
   return FeaturesHelper.isFeatureSetBetter(
     planA?.features || {},
@@ -596,28 +576,15 @@ function buildGroupSubscriptionForView(groupSubscription) {
 }
 
 function buildPlansListForSubscriptionDash(currentPlan, isInTrial) {
-  const allPlansData = buildPlansList(currentPlan, isInTrial)
-  const plans = []
-  // only list individual and visible plans for "change plans" UI
-  if (allPlansData.studentAccounts) {
-    plans.push(
-      ...allPlansData.studentAccounts.filter(plan => !plan.hideFromUsers)
-    )
-  }
-  if (allPlansData.individualMonthlyPlans) {
-    plans.push(
-      ...allPlansData.individualMonthlyPlans.filter(plan => !plan.hideFromUsers)
-    )
-  }
-  if (allPlansData.individualAnnualPlans) {
-    plans.push(
-      ...allPlansData.individualAnnualPlans.filter(plan => !plan.hideFromUsers)
-    )
-  }
-
+  const { allPlans, planCodesChangingAtTermEnd } = buildPlansList(
+    currentPlan,
+    isInTrial
+  )
   return {
-    plans,
-    planCodesChangingAtTermEnd: allPlansData.planCodesChangingAtTermEnd,
+    plans: CHANGE_PLAN_MODAL_PLAN_CODES.map(code => allPlans[code]).filter(
+      Boolean
+    ),
+    planCodesChangingAtTermEnd,
   }
 }