- Added WebLLM service for client-side AI summarization and translation
- Improved summary quality (5 sentences, 600 char limit)
- Added Vietnamese character detection for proper language labels
- Added Copy button for summary content
- Key Points now extract conceptual ideas, not transcript excerpts
- Removed mini player (scroll-to-minimize) feature
- Fixed main.js null container error
- Silent WebLLM loading (no overlay/toasts)
- Added transcript service with yt-dlp
