fix: resolve PHPCS Plugin Check false positives and wp_redirect security warnings

[faisalahammad]

Summary

Replace wp_redirect() with wp_safe_redirect() in the template loader and lesson progression controller to mitigate open redirect risks flagged by the WordPress Plugin Check tool.

Changes

includes/class.llms.template.loader.php

Before: wp_redirect() used for content restriction redirects.

After: wp_safe_redirect().

Why: Restricts redirect destinations to local URLs, prevents open redirect.

includes/controllers/class.llms.controller.lesson.progression.php

Before: wp_redirect() used for lesson auto-advance after completion.

After: wp_safe_redirect().

Why: Same open redirect mitigation.

Testing

Test: Lesson auto-advance

1. Enroll student in course with multiple lessons
2. Complete lesson
3. Verify redirect goes to next lesson

Result: Works as expected

Test: Content restriction redirect

1. Set course to members only
2. Access course page as logged-out user
3. Verify redirect to configured page

[brianhogg]

@faisalahammad The "fixes" number is pointing to a pull request. Not sure if there's an issue this is fixing or if that should be removed from the description?

[faisalahammad]

Removed the Fixes #3194 line. That PR is unrelated, you were right. Also reverted the parent-course.php translation change and the meta-box field phpcs:ignore per your review. PR now only contains the two wp_safe_redirect() swaps and the changelog entry.

[brianhogg]

@faisalahammad I see the description change but could you confirm the changes have been pushed? I'm still seeing the change to includes/admin/post-types/meta-boxes/fields/llms.interface.meta.box.field.php and templates/course/parent-course.php in the diff https://github.com/gocodebox/lifterlms/pull/3209/changes. Thanks!

[faisalahammad]

@brianhogg I had to step away from my desk halfway through because of Jumma prayer, so the changes weren’t fully pushed yet. When you get a chance, could you please take another look and re-review it? Really appreciate your help! Thanks a lot.