Temporarily Re-Introduce Studio Maintenance Announcements

[kdmccormick]

Description

This PR has two commits:

• The first commit is a straight revert of fix: Remove pointless Maintenance and Announcement apps #35852, which removed both parts of the Studio Maintenance dashboard (Announcements and Force-Publish-Course).
• The second commit then re-removes Force-Publish-Course, because it has been broken since the moment it was merged into the platform.

The net result is that we are temporarily re-introducing just the Announcements tool within the Studio Maintenance dashboard, as well as the "Maintenance" link in the Studio header. The "Maintenance" link in the MFE header will be re-introded in a quick follow-up PR, which also needs review and approval: openedx/frontend-component-header#565

Supporting information

See discussion: #35852 (comment)

Screenshots & testing instructions

Set FEATURES['ENABLE_ANNOUNCEMENTS'] = True, and then disable the learner home MFE via waffle (/admin/waffle/flag/?q=learner_home_mfe).

Go to the restored maintenance dashboard in Studio. Notes:

• Until the linked header PR is merged, the only way to get to this page from the authoring MFE is to type the URL in: <CMS_BASE>/maintenance.
• Notice that the "Edit Announcements" option has been restored, but the old broken "Force Publish Course" option has not been restored.

Create few new announcements. Make at least one active, and one inactive:

Ensure the active ones show up on the legacy learner dashboard (at <LMS_BASE>/):

Please note that the janky image and text formatting was an existing behavior, and is part of why we desire to remove this feature from the platform soon.

[open-craft-grove]

Sandbox deployment successful 🚀
🎓 LMS
📝 Studio
ℹ️ Grove Config, Tutor Config, Tutor Requirements

[kdmccormick]

Converting back to draft since the announcements don't seem to be showing up on the learner dashboard for some reason...https://pr-36107-139931.sandboxes.opencraft.hosting/dashboard

@Agrendalath , if you see something obviously wrong with this, let me know. Otherwise I'll try to fix it later today or tomorrow.

[open-craft-grove]

Sandbox deployment failed 💥
Please check the settings and requirements.
Retry deployment by pushing a new commit or updating the requirements/settings in the pull request's description.
📜 Failure Logs
ℹ️ Grove Config, Tutor Config, Tutor Requirements

[kdmccormick]

Ah, I need to turn on ENABLE_ANNOUNCEMENTS

[open-craft-grove]

Sandbox deployment failed 💥
Please check the settings and requirements.
Retry deployment by pushing a new commit or updating the requirements/settings in the pull request's description.
📜 Failure Logs
ℹ️ Grove Config, Tutor Config, Tutor Requirements

[open-craft-grove]

Sandbox deployment successful 🚀
🎓 LMS
📝 Studio
ℹ️ Grove Config, Tutor Config, Tutor Requirements

[open-craft-grove]

Sandbox deployment successful 🚀
🎓 LMS
📝 Studio
ℹ️ Grove Config, Tutor Config, Tutor Requirements

[kdmccormick]

@Agrendalath OK, this is actually ready now. The PR sandbox is not working, but I have verified the change locally and included screenshots.

[Agrendalath]

@kdmccormick, thank you for preparing this!

👍

• I tested this: verified that the announcements can be edited in Studio and are displayed correctly on the legacy dashboard
• I read through the code
• I checked for accessibility issues: n/a
• Includes documentation: n/a