Question sharing (edits now propagate):
- quiz_question_links junction table: quizzes reference questions, not own copies
- Existing questions migrated to junction (idempotent ON CONFLICT DO NOTHING)
- from-bank and from-category create quiz by adding junction links (no copying)
- Editing a question via QuizEditPage or bank Edit modal updates the ONE record
visible in all quizzes that reference it
- Delete from quiz: only deletes Question record if no other quiz references it
- quiz_service: fixed position counter (was using len() incorrectly, now enumerate)
- question.quiz_id renamed to source_quiz_id in Python (DB column still quiz_id)
- All attempts/quizzes/search code updated to use junction helper or source_quiz_id
Bug fixes:
- PostgreSQL en_US.utf8 collation B-tree index corruption on users.email
Fixed by ALTERing column to COLLATE "C" in migration + immediate repair
- get_current_user now blocks unverified users on ALL endpoints (403 + X-Unverified header)
api/client.js intercepts X-Unverified=true and auto-logs out to /login
- Search (quiz + bank): correct_answer and explanation now included in matching_questions
so study modals work correctly
- Keyword search: order_by updated to use source_quiz_id
- Bulk category: changed from PATCH with body array to POST with Pydantic body
(fixes null category_id removal)
- Question bank: edit button added, answer highlighting removed from list view
- QuestionBankPage: Keyword/Semantic/Hybrid search toggle
- Login: login error message stays visible (removed immediate reload)
Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>
Architecture:
- Questions are primary objects in a bank, tagged with question categories
- QuestionCategory is a separate taxonomy from QuizCategory (different concepts)
- Extraction → questions added to bank, optionally tagged to a question category
- Quizzes can be created from: individual question selection, question category, or PDF extraction
Backend:
- QuestionCategory model + question_categories table
- question_category_id column on questions table (nullable, SET NULL on delete)
- GET/POST/PATCH/DELETE /api/question-categories/
- POST /api/question-categories/{id}/create-quiz — create quiz from all questions in a category
- PATCH /api/questions/{id}/category — assign single question to category
- PATCH /api/questions/bulk-category — assign multiple questions at once
- GET /api/questions/bank?category_id=&uncategorized= — filter by category
- QuizCreate schema now accepts question_category_id for extraction
- quiz_service.create_quiz_from_section accepts question_category_id param
Frontend:
- DocumentDetailPage: Add to Bank Category dropdown in Quiz Settings (optional)
Labels extracted questions with the selected category on creation
- QuestionBankPage: full rewrite
- Category chips for filtering (All / Uncategorized / named categories)
- Create category button inline
- Checkbox multi-select with bulk category assignment
- Create Quiz modal: choose from selected questions OR all from a category
- Each question shows its category badge and quiz source
- Study modal with instant answer feedback
Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>
Security:
- Nginx: X-Frame-Options, X-Content-Type-Options, X-XSS-Protection, CSP, Referrer-Policy, Permissions-Policy headers
- Redis-backed login rate limiting (survives container restarts)
- Admin litellm/models endpoint: api_key moved from GET query param to POST body
- Nextcloud credentials moved from localStorage to sessionStorage (cleared on tab close)
UX / Layout:
- Login: unverified users see inline "Resend verification email" option
- QuizPage mobile: TTS Listen button on its own row below question text
- QuizPage mobile: Voice selector on its own row in header card (not squashed with timer)
- QuizEditPage: scroll position preserved after saving a question edit
Quiz Categories:
- New QuizCategory model + quiz_categories table
- category_id column added to quizzes table
- GET/POST/DELETE /api/categories endpoints
- Quizzes grouped by category in QuizzesPage; moderators can assign via 🏷 menu
- Uncategorized section shown when categories exist
Question Bank:
- GET /api/questions/bank — search all questions across quizzes
- POST /api/questions/from-bank — create new quiz from selected questions (copies, originals untouched)
- QuestionBankPage: search, checkbox select, study modal, create quiz form
- "Question Bank" link added to Navbar
Search:
- "View all N questions →" button expands to full question list
- Each question has a Study button opening in-place modal with study mode
- Summary view shows 2 questions per quiz with Study button
Extraction prompt:
- Stronger emphasis on correct_answer field with step-by-step letter → full text example
- Explicit instruction never to store just the letter
Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>
- FastAPI backend with JWT auth, roles (admin/moderator/user)
- PDF upload (up to 500MB) with streaming, PyMuPDF text extraction
- ChromaDB vectorization per page with metadata
- LiteLLM AI question extraction from PDF (not generation)
- Image extraction from PDF pages, graceful fallback
- Quiz modes: timed (countdown timer) + learning (answers shown inline)
- Page-by-page question navigation with dot navigator
- TTS endpoint using LiteLLM (Google Vertex / OpenAI voices)
- Admin dashboard: AI model management per task, user role management
- Moderator role: upload PDFs, create sections, generate quizzes
- Spaced repetition reminders via SMTP email (SM-2 intervals)
- APScheduler daily reminder jobs
- Celery + Redis for background PDF processing
- React frontend with all pages
- Docker Compose deployment (nginx + backend + celery + redis)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
