Function
Every course the signed-in learner is enrolled in, as one snapshot of course slugs.
A stable set of course slugs; empty before hydration
A learner joins a course by enrolling from the course pages or by opening one of its lessons (capability course-enrollment), and stays enrolled.
course-enrollment
Browser-side only — do NOT call from a Server Component.
Every course the signed-in learner is enrolled in, as one snapshot of course slugs.