fix: Reset deadline state on error and add upload timing logs

fix: correct timeRemaining variable in countdown timer

feat: rewrite QuizPlayer with clean single-page UI and fix PDF upload FormData

fix: Enable quiz scroll and increase API timeout to 3 minutes

fix: Enable scroll in QuizPlayer modal

fix: Remove dead code from pagination mode conversion

feat: Convert QuizPlayer to single-page scroll mode

fix: Update countdown timer to use ref for non-retriggering updates

fix: Consistent error messages and archive terminology across quiz components

fix: Improve quiz error messages and modal overflow handling

feat: Fix countdown timer, rename quiz list, and add sorting

fix: Add clock skew buffer and better deadline error handling

fix: Fix quiz deadline bug and add user profile names in results

feat: Cải thiện đầy đủ hệ thống quiz

fix: Chữa timezone và tránh flash khi reload quiz

feat: Thêm countdown timer và deadline validation cho quiz

feat: thêm hạn nộp quiz và cải thiện at-risk scoring

fix: Fix at-risk scoring bugs and update UI

feat: Implement PDF indexing to Qdrant and improve quiz send notification

feat: add QuizResults component for displaying quiz results and analytics

feat: Add Quiz Interactive feature - Phase 1 (Database + Backend)

feat: Enhance TA service and UI components

feat: initialize AI TA Copilot dashboard UI and add supporting utility scripts and documentation

feat: implement AI compose modal for smart message generation and add supporting documentation and utility scripts

sửa prompt của TA AI DM

update danh sách quán lý thông báo và recap 3

feat: implement AI-driven TA dashboard core services, UI integration, and comprehensive system documentation

feat: implement AnnouncementWorkflow component and associated documentation for automated TA communication module

feat: implement AI-assisted messaging and summary workflow for Teaching Assistant dashboard

feat: implement AI-powered recap workflow with configuration, file upload, and content refinement capabilities

feat: initialize TA dashboard architecture with React UI, core service modules, and supporting documentation.

feat: implement TA dashboard recap workflow, AI analysis integration, and backend service modules

bản TA dashboard chưa kết nối api agent