- settings: study.mode fast|normal and study.parallel 1-5
- normal mode: one headless browser per video, visibility keep-alive, auto-degrade when the platform enforces order
- report study/log/detail/save before isComplete; drop lastProgressTime on completion
- complete periodType 10/13 container nodes and recompute counters via PUT calFinalScore
- capture mode: POST /api/capture records all XHR/fetch including new tabs
- UI: study mode in settings, capture / stop-capture menu items
study-tool