Privacy choices and fewer lost edits

What changed

• Settings has a new privacy section, and the privacy page has a Privacy choices button, so you can change your analytics choice at any time. That one choice covers all optional analytics on the site.
• Recruiters are less likely to lose unsaved work. The assessment settings page warns before you leave or reload, editing a question keeps your other pending changes, and a candidate report asks before closing with an unsaved decision or note.
• Rena's lesson whiteboard gained a full-screen button and a volume slider, and she stops talking when you leave the lesson. Password reset now shows its success screen and the real reason a code was rejected.