[Internal]: Add time range filters in all cases view

[christineweng]

Description

With elastic/kibana#243409, user will be able to filter cases by selecting a time range. A custom quick add called "Show all cases" is available for users to see all cases as before. Default is last 30 days.

Impacted docs and screenshots

Note to self: Consider ways to single-source or generalize the impacted images and content.

Security

• Update the intro of the Manage existing cases section. Consider making it more generalizable as more filters and design changes will likely be added to the table in future releases.
• Refresh the following screenshots:
  • security-cases-home-page.png
  • security-add-alert-to-existing-case.png

Observability

• Update the intro of the [Manage existing cases] (https://www.elastic.co/docs/solutions/observability/incident-management/create-manage-cases#observability-create-a-new-case-manage-existing-cases)
• Refresh the following screenshots:
  • observability-cases.png

Kibana (Stack Management)

• Update the intro of the [Manage cases] (https://www.elastic.co/docs/explore-analyze/alerts-cases/cases/manage-cases#manage-case)
• Refresh the following screenshots:
  • kibana-cases-list.png

Resources

PR: elastic/kibana#243409

Targeting 9.3 and serverless

Which documentation set does this change impact?

Elastic On-Prem and Cloud (all)

Feature differences

No difference

What release is this request related to?

N/A

Serverless release

Monday December 1 8, 2025

Collaboration model

The documentation team

Point of contact.

Main contact: @christineweng

Stakeholders: @melissaburpo