[pfefferle]

Follow-up to #3876.

Proposed changes:

• Remove the comment transformer's redundant contentMap rebuild. The base transformer already builds it as a logged-out visitor; rebuilding it after restoring the current user could include member-only text added by content filters.
• Add regression coverage for both comment_text and activitypub_the_content, verifying public content in the language map and restoration of the current user.

Other information:

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

Both regression cases fail against the original code. All 11 comment-transformer tests (26 assertions), repository PHP lint, and PHPStan pass with the fix. The code review found no actionable issues.

The full local suite ran 4,080 tests with two failures: Test_Actors_Inbox_Controller::test_user_inbox_post_verification (also present in the saved trunk run) and Test_Remote_Posts::test_add_recipients (passes when rerun in isolation). These results are not a clean full-suite pass.

The existing unreleased .github/changelog/fix-render-as-visitor entry covers this correction; this PR uses Skip Changelog.

Testing instructions:

• Run npm run env-test -- --filter=Transformer.Test_Comment.
• The two test_content_map_renders_as_visitor cases simulate filters that append different text for members and visitors. Confirm that content and every language-map value contain the visitor text and that the logged-in user is restored.
• Restore the removed set_content_map() block to verify both new cases fail because the map contains member-only text.

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