埋点
打开student_companion_opened
解析成功question_context_resolved
展示 L1/L2/L3hint_shown
L2 选择interactive_hint_choice_submitted
回题试试retry_after_hint
还是不会still_stuck
换种说法controlled_follow_up_requested
追问展示controlled_follow_up_shown
提交answer_submitted_after_hint