Standardise experimental Jenkins pages, make the side panel independently scrollable + make the build bar sticky

[janfaracik]

This PR helps bring the ongoing redesign together by introducing a shared frame across Jenkins, making Manage Jenkins, dashboard, job, and build pages feel more consistent.

It also makes the side panel independently scrollable, keeps the build bar sticky at the top, and improves responsiveness on smaller devices such as the iPad mini.

Issues

• Full screen pages don't work
• Plugins with sticky elements (e.g. Pipeline Graph View) don't behave as expected
• Design Library doesn't look great without the appropriate layout prop
• Get tests passing

Testing done

Screenshots (UI changes only)

Before

After

Proposed changelog entries

• Standardise experimental Jenkins pages, make the side panel independently scrollable + make the build bar sticky

Proposed changelog category

/label

Proposed upgrade guidelines

N/A

Submitter checklist

• The issue, if it exists, is well-described.
• The changelog entries and upgrade guidelines are appropriate for the audience affected by the change (users or developers, depending on the change) and are in the imperative mood (see examples). Fill in the Proposed upgrade guidelines section only if there are breaking changes or changes that may require extra steps from users during upgrade.
• There is automated testing or an explanation as to why this change has no tests.
• New public classes, fields, and methods are annotated with @Restricted or have @since TODO Javadocs, as appropriate.
• New deprecations are annotated with @Deprecated(since = "TODO") or @Deprecated(forRemoval = true, since = "TODO"), if applicable.
• UI changes do not introduce regressions when enforcing the current default rules of Content Security Policy Plugin. In particular, new or substantially changed JavaScript is not defined inline and does not call eval to ease future introduction of Content Security Policy (CSP) directives (see documentation).
• For dependency updates, there are links to external changelogs and, if possible, full differentials.
• For new APIs and extension points, there is a link to at least one consumer.

Desired reviewers

@mention

Before the changes are marked as ready-for-merge:

Maintainer checklist

• There are at least two (2) approvals for the pull request and no outstanding requests for change.
• Conversations in the pull request are over, or it is explicit that a reviewer is not blocking the change.
• Changelog entries in the pull request title and/or Proposed changelog entries are accurate, human-readable, and in the imperative mood.
• Proper changelog labels are set so that the changelog can be generated automatically.
• If the change needs additional upgrade steps from users, the upgrade-guide-needed label is set and there is a Proposed upgrade guidelines section in the pull request title (see example).
• If it would make sense to backport the change to LTS, be a Bug or Improvement, and either the issue or pull request must be labeled as lts-candidate to be considered.

[janfaracik]

ath-linux-jdk21-firefox / buildParametrized core.FreestyleJobTest keeps failing on CI annoyingly, passing locally 😕

[alecharp]

It passes locally as well..

[github-actions]

Please take a moment and address the merge conflicts of your pull request. Thanks!

[github-actions]

Please take a moment and address the merge conflicts of your pull request. Thanks!

[janfaracik]

ath-linux-jdk21-firefox / buildParametrized core.FreestyleJobTest keeps failing on CI annoyingly, passing locally 😕

Any thoughts @timja?

[timja]

ath-linux-jdk21-firefox / buildParametrized core.FreestyleJobTest keeps failing on CI annoyingly, passing locally 😕

Any thoughts @timja?

Works for me locally. I'd skip it in CI get an incremental and run it in the ATH repo which saves videos (or enable the video saving here if its trivial)

(I've triggered a replayed build without ATH)

I think attachments may not be working because this is missing in the script in this repo:

https://github.com/jenkinsci/acceptance-test-harness/blob/afd795d7a2c74e6b5d1fb17c7aebe4f921dffd13/ci.sh#L29-L34