AI conversation tiles have a new learner UI and a full set of author grading controls:
- Learners choose voice or text at the start, with real-time status shown throughout the conversation
- Authors can configure pass/fail scoring, set the passing threshold, and choose what learners see afterward
- Grading is driven by agenda items, replacing the separate Objectives configuration
- Attempt limits let authors cap retries and optionally lock retakes once a learner passes
- Elapsed time is preserved when learners resume, and a loading indicator shows while the AI is responding