chore: Add unit tests for media and settings modules - phase 2

[sabbir1991]

What

Adds PHPUnit unit tests for Phase 2, covering six previously untested classes across the MediaLibrary, MediaSharing, and Settings modules.

Why

Continuing the PHPUnit test coverage initiative started in Phase 1.

Related Issue(s):

• Part of: #

How

Six new test files added following established Phase 1 patterns (smoke tests for hooks, assertSame for logic methods):

File	Class	Tests
Unit/Modules/Settings/AdminTest.php	Settings\Admin	5
Unit/Modules/MediaSharing/AttachmentTest.php	MediaSharing\Attachment	6
Unit/Modules/MediaLibrary/ConsumerAdminTest.php	MediaLibrary\ConsumerAdmin	4
Unit/Modules/MediaSharing/UserInterfaceTest.php	MediaSharing\UserInterface	4
Unit/Modules/MediaSharing/MediaProtectionTest.php	MediaSharing\MediaProtection	4
Unit/Modules/MediaLibrary/AdminTest.php	MediaLibrary\Admin	7

No source files were modified.

Testing Instructions

1. Ensure test wp-env is running: npm run wp-env:test start
2. Run npm run test:php
3. All 81 tests should pass

Checklist

• I have read the Contribution Guidelines.
• I have read the Development Guidelines.
• My code is tested to the best of my abilities.
• My code passes all lints (ESLint etc.).
• My code has detailed inline documentation.
• I have updated the project documentation as needed.
• I have added a changeset for this PR using npm run changeset.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 17.97%. Comparing base (69e9219) to head (b6f74f0).

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #130      +/-   ##
============================================
+ Coverage     12.73%   17.97%   +5.24%     
  Complexity      666      666              
============================================
  Files            22       22              
  Lines          2748     2748              
============================================
+ Hits            350      494     +144     
+ Misses         2398     2254     -144     

Flag	Coverage Δ
unit	17.97% <ø> (+5.24%)	⬆️

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[Copilot]

Pull request overview

This PR adds Phase 2 PHPUnit coverage for previously untested Media Library, Media Sharing, and Settings module classes without modifying production code.

Changes:

• Adds unit tests for Settings admin rendering/action links/body class handling.
• Adds Media Sharing tests for attachment metadata helpers, UI action filtering, and edit protection.
• Adds Media Library admin tests for sync query filtering and consumer-site action restrictions.

Reviewed changes

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

Show a summary per file

File	Description
tests/phpunit/Unit/Modules/Settings/AdminTest.php	Adds Settings admin unit tests.
tests/phpunit/Unit/Modules/MediaSharing/UserInterfaceTest.php	Adds media sync column and row-action tests.
tests/phpunit/Unit/Modules/MediaSharing/MediaProtectionTest.php	Adds synced attachment capability protection tests.
tests/phpunit/Unit/Modules/MediaSharing/AttachmentTest.php	Adds attachment sync metadata helper tests.
tests/phpunit/Unit/Modules/MediaLibrary/ConsumerAdminTest.php	Adds consumer admin hook and action filtering tests.
tests/phpunit/Unit/Modules/MediaLibrary/AdminTest.php	Adds media library AJAX sync filter query tests.

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