[#70194] Primerize Admin Backlogs Settings

[myabc]

Ticket

https://community.openproject.org/work_packages/70194

What are you trying to accomplish?

Primerizes Administration > Backlogs page

Screenshots

What approach did you choose and why?

Merge checklist

• Added/updated tests
• Added/updated documentation in Lookbook (patterns, previews, etc)
• Tested major browsers (Chrome, Firefox, Edge, ...)

[github-actions]

Caution

The provided work package version does not match the core version

Details:

• Work package URL: https://community.openproject.org/work_packages/70194
• Work package version: not set
• Core version: 17.1.0

Please make sure that:

• The work package version OR your pull request target branch is correct

[Copilot]

Pull request overview

This PR migrates the Backlogs Settings admin page from legacy form helpers to Primer components, introducing a new reusable SelectPanel form input component for the OpenProject Primer forms DSL.

Key changes:

• Introduces a new SelectPanel form input component that wraps Primer's SelectPanel for use in OpenProject forms
• Refactors the Backlogs settings page to use Primer form components with proper model validation
• Adds comprehensive test coverage including unit tests, form specs, and feature specs

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 14 comments.

Show a summary per file

File	Description
spec/lib/primer/open_project/forms/select_panel_spec.rb	Adds unit tests for the new SelectPanel component
spec/lib/primer/open_project/forms/dsl/input_methods_spec.rb	Adds test coverage for the select_panel input method
modules/backlogs/spec/forms/admin/settings/backlogs_settings_model_spec.rb	Tests the new BacklogsSettingsModel validation logic
modules/backlogs/spec/forms/admin/settings/backlogs_settings_form_spec.rb	Tests the BacklogsSettingsForm rendering
modules/backlogs/spec/features/admin/backlogs_settings_spec.rb	Feature tests for the Backlogs settings page functionality
modules/backlogs/spec/controllers/backlogs_settings_controller_spec.rb	Updates controller specs to use new validation approach
modules/backlogs/config/locales/en.yml	Adds translations for select panel labels and error messages
modules/backlogs/app/views/backlogs_settings/show.html.erb	Replaces legacy form with Primer form using new settings model
modules/backlogs/app/forms/admin/settings/backlogs_settings_model.rb	Introduces ActiveModel for settings with validation logic
modules/backlogs/app/forms/admin/settings/backlogs_settings_form.rb	Implements Primer form using select_panel inputs
modules/backlogs/app/controllers/backlogs_settings_controller.rb	Refactors to use model validation instead of custom validation
lib/primer/open_project/forms/select_panel.rb	New component wrapping Primer's SelectPanel
lib/primer/open_project/forms/select_panel.html.erb	Template for SelectPanel component
lib/primer/open_project/forms/dsl/select_panel_input.rb	Input class for SelectPanel in the forms DSL
lib/primer/open_project/forms/dsl/input_methods.rb	Adds select_panel method to forms DSL
frontend/src/stimulus/controllers/dynamic/admin/backlogs-settings.controller.ts	Stimulus controller for mutual exclusion between story/task type selections
config/locales/en.yml	Updates type attribute translation to support pluralization

[HDinger]

LGTM 👍

As discussed, I'd like to get a review from product people as well before we merge this.

[HDinger]

As discussed yesterday, there are two issues worth fixing:

• Hiding the disabled items from the options
• Show the correct label when de-selecting all items