application/json - family_key in pathPATCH /users/intents. Requires a valid Bearer token.intents - list of intent slugs (max 3 kept; unknown slugs are ignored; empty list clears them). Fetch the available slugs from GET /lookup/intents.200 - intents updated successfully. Re-fetch via GET /users/family.401 - missing/invalid token | 404 - family member not found | 422 - invalid body