Move resource management to dedicated Manage Jenkins subpage and modernize UI

[adityajalkhare]

What changed

Lockable Resources now has its own page under Manage Jenkins, replacing
the old Global Configuration form for resource management. The UI is rebuilt
using native Jenkins components, dropping the data-tables-api dependency.

For users

Before: Resources were added/edited in Manage Jenkins > System inside a
long repeatable form mixed with other system settings. The overview page at
/lockable-resources/ used DataTables and Bootstrap, which broke under
Jenkins experimental UI flags.

After:

• Dedicated management page - Go to Manage Jenkins > Lockable Resources
  (under the Configuration category). All resource operations live here now.
• Add, edit, and delete resources directly from the overview page using
  the "Add Resource" button and per-row edit/delete actions. No need to visit
  Global Configuration to manage resources.
• Filtering - Click the filter icon in the top bar. On the Resources tab,
  filter by name, label, or status (free/reserved/locked/queued). On Labels
  and Queue tabs, use text search.
• Pagination - Tables show 10/25/50/100/All rows with your preference
  saved in the browser.
• Works with all UI flags - Compatible with new-dashboard-page,
  new-build-page, new-job-page, and new-manage-jenkins experimental flags.
• Global Configuration still shows the two system-wide behavior toggles
  (Allow empty or null values and Allow ephemeral resources) with a link
  to the new management page.
• Bookmarks still work - The old URL /lockable-resources/ continues to
  serve the page (now at /manage/lockable-resources/).

Screenshots/Demo

New Experimental UI -

Screen.Recording.2026-05-19.at.11.49.57.PM.mov

Existing Stable UI -

Screen.Recording.2026-05-19.at.11.52.20.PM.mov

Fixes

• Fixes Move lockable resources configuration to separate section #1021 - Move lockable resources configuration to separate section

• Fixes Redesigned dashboard: Lockable Resources page #964 - Redesigned dashboard: Lockable Resources page broken with
  experimental UI flags

• Fixes Strange UI situation #1018 - Strange UI situation (same root cause as Redesigned dashboard: Lockable Resources page #964)

• Partially addresses Concern: is editing all resource fields via global config page safe? #143 - Resources are no longer editable from the global configuration page, reducing the risk of accidental state corruption

• Addresses Improvement on the UI/UX of the data table #496

• Partially addresses admin role for add\remove\unreserve resource #287 - ADMINISTER gates add/edit/delete, VIEW gates page access --- MAYBE, the scope is unclear in that PR

Changes by area

Backend (LockableResourcesRootAction.java)

• Changed from RootAction to ManagementLink under Category.CONFIGURATION
• Added doCreateResource (form + JSON), doEditResource (JSON),
  doDeleteResource endpoints with proper HTTP status codes
• Resource properties (key-value pairs) supported in create/edit

Frontend

• Removed data-tables-api dependency from pom.xml
• Replaced DataTables with native jenkins-table sortable
• Capsule-style tab bar (Resources / Labels / Queue)
• Client-side pagination with localStorage persistence
• Filter/search popover adapting per tab
• Add/Edit/Delete dialogs using Jenkins dialog.modal and dialog.confirm
• Resource properties shown as pills, editable via dynamic rows
• Single event delegation listener for all button handlers

Global Config (config.jelly)

• Removed the resource repeatable form
• Kept only the two behavior checkboxes
• Added notice linking to the new management page

Tests

• ManagementLinkTest (7 tests): registration, category, URL, icon,
  permissions
• ResourceManagementTest (21 tests): CRUD, duplicate/404/423 handling,
  JSON API, permission checks, page structure

Testing

• 28 new tests covering all new endpoints and page structure
• All existing tests pass (412 total)
• Manually verified with all experimental flags enabled:
  new-build-page, new-dashboard-page, new-job-page,
  new-manage-jenkins

Checklist

• Automated tests added or existing tests cover the change
• PR title is a clear, imperative-mood changelog entry
• Breaking changes or upgrade steps are documented below

Upgrade guidelines

N/A

[adityajalkhare]

The test that failed, LockStepWithRestartTest.lockOrderRestart, seems to me it's a known flaky test.

[adityajalkhare]

@mPokornyETM @MarkEWaite please review

[adityajalkhare]

Added video demos

[meeusen]

I like the new layout, it looks good, and adding/changing resources from within the table is nice.

Some things I noticed:

• I can only access the lockable resources through the manage Jenkins page, I don't see it in the "menu with the three horizontal lines" anymore? Our regular users would need to use the URL directly?
• personally, I like the previous search button, that searched for everything in the table, and where the search text is remembered on page reload/reservation (using >100 resources). I'd use it to see resources on my name, and after unreserving one, I'd still see the others on my name. Same for filtering on a resource name and reserving it.
• there is no possibility to order the resources anymore in the configuration (unless using CasC)?

[adityajalkhare]

@meeusen

there is no possibility to order the resources anymore in the configuration (unless using CasC)?

The old config was done using a repeatable form which allowed drag and drop to reorder resources.

The current config, using table, allows view-only sorting using column headers.

So - as per my understanding, without any hacks or massive workarounds, we cannot reorder the persisted XML using UI.