Edit EMA: Add Notification for Duplicate Contentlet Addition

[fmontes]

Parent

#26644

User Story

As a dotCMS user, I want to be notified when I try to add the same contentlet twice to the same container so that I am aware that it is not possible.

Tasks

Preview Give feedback

1. When a user tries to add a contentlet that already exists in a container, a toast notification should be displayed.
2. The toast notification should inform the user that the contentlet cannot be added again.
3. The notification should be visually distinguishable and easily noticeable.
4. The notification should disappear automatically after a few seconds.

Proposed Objective

Static content: "Core Features"

Proposed Priority

Static content: "Priority 3 - Average"

External Links... Slack Conversations, Support Tickets, Figma Designs, etc.:

We already have a catchError in the savePage request because it is failing silently.

Assumptions & Initiation Needs

• The user should have appropriate permissions to add contentlets to containers.
• The system should be able to detect duplicate contentlets in a container.

Quality Assurance Notes & Workarounds

• Verify that the toast notification is displayed when trying to add a duplicate contentlet.
• Confirm that the notification clearly states that the contentlet cannot be added again.
• Ensure that the notification disappears automatically