fix: remove waffle flag to show Certificates menu

[Anas12091101]

Description

The Certificates link in the Settings menu was always visible regardless of the ENABLE_CERTIFICATE_PAGE configuration because the conditional used an OR (||) operator to check either the config value or the useNewCertificatesPage waffle flag (mapped to legacy_studio.certificates in the platform). A recent upstream change in openedx-platform made legacy_studio.certificates always return True, which meant the OR condition was always satisfied and operators could no longer hide the Certificates menu by setting ENABLE_CERTIFICATE_PAGE=false.

This PR removes the waffle flag requirement for the Certificates link to appear, restoring operator control over menu visibility. Additionally, the default value of ENABLE_CERTIFICATE_PAGE has been changed from 'false' to 'true' so that existing deployments that rely on the waffle flag continue to see the menu without needing to add a new config variable.

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• Which user roles will this change impact? Course Author
• Include screenshots for changes to the UI (ideally, both "before" and "after" screenshots, if applicable).

Supporting information

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Testing instructions

Manual Testing Steps

1. Test: Certificates visible by default

   • Ensure .env.development has ENABLE_CERTIFICATE_PAGE=true (or remove the variable entirely — it now defaults to true).
   • Open any course in Studio (e.g., http://apps.local.openedx.io:2001/course/course-v1:edX+DemoX+Demo_Course).
   • Click the Settings dropdown in the header.
   • Expected: "Certificates" link is present.

2. Test: Certificates hidden when config is false

   • Set ENABLE_CERTIFICATE_PAGE=false in .env.development.
   • Restart the dev server.
   • Open the same course and click Settings.
   • Expected: "Certificates" link is not present.

3. Test: Certificates hidden when config is removed and default was relied upon

   • Remove the ENABLE_CERTIFICATE_PAGE line entirely from .env.development.
   • The default in index.jsx is now 'true', so certificates should appear.
   • Restart the dev server, open the course, click Settings.
   • Expected: "Certificates" link is present.

4. Run automated tests

   npx jest src/header/hooks.test.tsx --no-coverage
   

   • Expected: All 24 tests pass.

Other information

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Thanks for the pull request, @Anas12091101!

This repository is currently maintained by @bradenmacdonald.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.55%. Comparing base (7138dfb) to head (e5ef2d3).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3066   +/-   ##
=======================================
  Coverage   95.55%   95.55%           
=======================================
  Files        1393     1393           
  Lines       32999    32994    -5     
  Branches     7645     7641    -4     
=======================================
- Hits        31532    31529    -3     
- Misses       1401     1412   +11     
+ Partials       66       53   -13     

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[bradenmacdonald]

It sounds like the useNewCertificatesPage waffle flag has been deleted right? So shouldn't we remove all references to it entirely, and just use the ENABLE_CERTIFICATE_PAGE MFE config?

BREAKING CHANGE: The 'legacy_studio.certificates' waffle flag will no
longer be respected. The system will behave as if the flag is set to
false permanently.
~ openedx/openedx-platform@7aaeef3

See also #3063 which has a plan for removing most of the waffle flags, for the same reason.

[bradenmacdonald]

Set ENABLE_CERTIFICATE_PAGE=false in .env.development and restart.
Navigate directly to http://apps.local.openedx.io:2001/course/course-v1:edX+DemoX+Demo_Course/certificates.
Expected: Page should show a 404 or redirect (the route in CourseAuthoringRoutes.tsx also checks this config).

It's not a big deal, but this isn't working for me. It just shows a blank page (header and footer but nothing else).

Otherwise, this PR is ready to go. I'm also fine merging it as is, because the link is being hidden correctly.

[Anas12091101]

Yep, my bad. I have removed that from the testing instructions. The behavior you're seeing is expected with the current implementation.

Other than that, the PR should be ready to merge.

[bradenmacdonald]

Thanks!

[bradenmacdonald]

@Anas12091101 There is a test failure on master after merging this, probably from someone else's changes in the meantime. Could you please take a look?

[Anas12091101]

Looking