In-progress quizzes section (Quizzes page):
- Shows all incomplete (not submitted) attempts in an amber ⏸ panel
- Each shows quiz title, start date, question count
- Resume button → navigates to quiz (which loads saved answers from Redis)
- Delete button (ConfirmButton) → deletes attempt + clears reminders
Quiz navigation warning:
- beforeunload handler warns when closing browser tab/window mid-quiz
- Leave confirmation modal when navigating away via React Router
(shows "Your progress is saved — resume later" + Stay/Leave buttons)
Quiz progress:
- Scroll on Next/Previous REMOVED per user request — page no longer scrolls
- Progress saved to Redis on every answer/navigation (1.5s debounce)
- Works across browsers, survives logout
- ModeSelectScreen loads saved progress from API and shows Resume button
Attempt management:
- POST /attempts/start now REUSES existing incomplete attempt (no more
creating duplicate incomplete attempts on every quiz start)
Pass fresh=true to force a new attempt
- GET /attempts/in-progress — list incomplete attempts for current user
- DELETE /attempts/{id} — delete attempt + reminders
Cleaned up 10 duplicate incomplete attempts from the database
Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>
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