Learning Paths can now tell you what you already know

Each not-yet-completed module in a Learning Path now has a quick self-check: New to me, Somewhat familiar, or Confident already.

Say you already know something, and it's badged "Suggested: skip." Say it's new, and it gets a "New to you" badge. Nothing is ever actually locked -- this is just a nudge to help you spend your time where it matters.