fix(audience): decode HTML entities in campaign prompt titles

[adekbadek]

All Submissions:

• Have you followed the Newspack Contributing guideline?
• Does your code follow the WordPress' coding standards and VIP Go coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

Prompt titles come back from the REST API HTML-encoded (a prompt named Foo & Bar arrives as Foo & Bar). The Campaigns wizard rendered the raw title string in two places, so the entity showed through literally:

1. The "Conflict detected" notice shown when two prompts target the same placement + segment – it listed the conflicting prompt's title verbatim.
2. The prompt preview modal title (Prompt: …).

Both now run the title through decodeEntities from @wordpress/html-entities, matching how prompt titles are already displayed elsewhere (e.g. prompt-action-card).

Before / After (conflict notice)

	Rendered text
Before	Spring Membership Drive & Renewal: If multiple overlays are rendered…
After	Spring Membership Drive & Renewal: If multiple overlays are rendered…

How to test the changes in this Pull Request:

1. Have Newspack Campaigns set up with at least two published overlay (or above-header / custom-placement) prompts assigned to the same segment, where one prompt's title contains an & that WordPress stored as & (e.g. set it directly: wp db query "UPDATE wp_posts SET post_title='Donate &amp; Subscribe' WHERE ID=<prompt_id>").
2. Open Audience → Campaigns. Find the segment group with the conflicting prompts.
3. The "Conflict detected" notice should list the other prompt's title with a literal &, not &.
4. Also click Preview on a prompt whose title contains an entity – the modal heading should read Prompt: Donate & Subscribe, not Prompt: Donate & Subscribe.

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes, as applicable? (SegmentGroup.test.js – "decodes HTML entities in conflicting prompt titles"; red/green verified)
• Have you successfully ran tests with your changes locally? (SegmentGroup.test.js suite passes; wp-scripts lint-js clean on changed files)

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR fixes HTML-encoded prompt titles (e.g. &) showing up literally in the Audience → Campaigns UI by decoding entities before rendering, aligning these surfaces with other components that already decode prompt titles.

Changes:

• Decode HTML entities for conflicting prompt titles shown in the “Conflict detected” notice.
• Decode HTML entities for the prompt preview modal title (Prompt: …).
• Add a unit test to verify entity decoding in conflict notice titles.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/wizards/audience/views/campaigns/utils.js	Decodes entities when rendering conflicting prompt titles in the conflict warning UI.
src/wizards/audience/views/campaigns/index.js	Decodes entities in the preview modal title before interpolating into Prompt: %s.
src/wizards/audience/components/segment-group/SegmentGroup.test.js	Adds coverage ensuring conflicting prompt titles are decoded in rendered notices.

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