[AGILE-314] Order sprints on 'all sprints' by activity

[EinLama]

Ticket

https://community.openproject.org/wp/AGILE-314

What are you trying to accomplish?

Order sprints on the all sprints page by activity.

What approach did you choose and why?

Introduced a new scope order_by_activity, it might be useful somewhere else (and it can be neatly unit-tested). The scope:

1. orders by sprint status as required
2. for sprints with the same status, sprint dates will be taken to decide which one to show first
3. for sprints with the same status and dates, the sprint name will decide
4. if even the names are the same, the database id will act as the final tie-breaker. In practice, this is unlikely to happen. But if it does, the order will be deterministic.

Merge checklist

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

[Copilot]

Pull request overview

Adds an “activity-based” ordering for Backlogs sprints on the All sprints page by introducing a dedicated Sprint.order_by_activity scope and switching the controller to use it.

Changes:

• Introduces Sprint.order_by_activity to sort by status (active → in planning → completed), then by dates (descending), then by name.
• Updates Backlogs::SprintsController#index to use the new ordering scope.
• Adds unit coverage for the new scope and adjusts/extends feature coverage for the sprints index ordering & pagination expectations.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
modules/backlogs/app/models/sprints/scopes/order_by_activity.rb	Adds new scope implementing activity-based ordering.
modules/backlogs/app/models/sprint.rb	Registers the new order_by_activity scope on Sprint.
modules/backlogs/app/controllers/backlogs/sprints_controller.rb	Switches sprints index ordering from date+name to activity-based ordering.
modules/backlogs/spec/models/sprints/scopes/order_by_activity_spec.rb	Adds unit specs for the new ordering scope.
modules/backlogs/spec/features/backlogs/sprints/index_spec.rb	Updates feature coverage for the new ordering and adjusts pagination expectations accordingly.

[dombesz]

Looks and works great, thanks!