User Option: Limit to users with Activitypub cap

[obenland]

See #1747 (review)

Proposed changes:

• Changes user query from authors to anyone with the activitypub capability.

Other information:

• Have you written new tests for your changes, if applicable?

Testing instructions:

• Go to the Editor and insert a Follow Me or Followers block.
• In the sidebar, make sure that all users with the activitypub capability are listed, even if they have the Subscriber role.

Changelog entry

• Automatically create a changelog entry from the details below.

Changelog Entry Details

Significance

• Patch
• Minor
• Major

Type

• Added - for new features
• Changed - for changes in existing functionality
• Deprecated - for soon-to-be removed features
• Removed - for now removed features
• Fixed - for any bug fixes
• Security - in case of vulnerabilities

Message

Follow Me and Followers blocks can now list any user that is Activitypub-enabled, even if they have the Subscriber role.

[Copilot]

Pull Request Overview

This PR updates the user query used in several blocks to filter for ActivityPub‐enabled users rather than just authors. Key changes include updating the query in use-user-options.js, adding a default parent value in the reactions render, and ensuring that dynamic user queries in the Followers and Follow Me blocks use the ActivityPub capability filter.

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

File	Description
src/shared/use-user-options.js	Updated query to use capabilities:"activitypub" and added documentation.
build/reactions/render.php	Added a default "parent" key with value 0.
build/followers/index.js	Adjusted the Followers block to use ActivityPub capability filtering.
build/follow-me/index.js	Updated the Follow Me block to ensure consistency in querying users.

[pfefferle]

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