🎉 Initial commit: QQuiz - 智能刷题与题库管理平台

## 功能特性

✅ **核心功能**
- 多文件上传与智能去重（基于 content_hash）
- 异步文档解析（支持 TXT/PDF/DOCX/XLSX）
- AI 智能题目提取与评分（OpenAI/Anthropic/Qwen）
- 断点续做与进度管理
- 自动错题本收集

✅ **技术栈**
- Backend: FastAPI + SQLAlchemy 2.0 + PostgreSQL
- Frontend: React 18 + Vite + Tailwind CSS
- Deployment: Docker Compose

✅ **项目结构**
- 53 个文件
- 完整的前后端分离架构
- Docker/源码双模部署支持

🚀 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,58 @@
+version: '3.8'
+
+services:
+  postgres:
+    image: postgres:15-alpine
+    container_name: qquiz_postgres
+    environment:
+      POSTGRES_USER: qquiz
+      POSTGRES_PASSWORD: qquiz_password
+      POSTGRES_DB: qquiz_db
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    ports:
+      - "5432:5432"
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U qquiz"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+  backend:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    container_name: qquiz_backend
+    environment:
+      - DATABASE_URL=postgresql+asyncpg://qquiz:qquiz_password@postgres:5432/qquiz_db
+    env_file:
+      - .env
+    volumes:
+      - ./backend:/app
+      - upload_files:/app/uploads
+    ports:
+      - "8000:8000"
+    depends_on:
+      postgres:
+        condition: service_healthy
+    command: uvicorn main:app --host 0.0.0.0 --port 8000 --reload
+
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
+    container_name: qquiz_frontend
+    volumes:
+      - ./frontend:/app
+      - /app/node_modules
+    ports:
+      - "3000:3000"
+    environment:
+      - REACT_APP_API_URL=http://localhost:8000
+    depends_on:
+      - backend
+    command: npm start
+
+volumes:
+  postgres_data:
+  upload_files: