feat: 初始化考培练系统项目

- 从服务器拉取完整代码
- 按框架规范整理项目结构
- 配置 Drone CI 测试环境部署
- 包含后端(FastAPI)、前端(Vue3)、管理端

技术栈: Vue3 + TypeScript + FastAPI + MySQL

backend/requirements/base.txt

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+# Core dependencies
+fastapi==0.104.1
+uvicorn[standard]==0.24.0
+pydantic==2.5.0
+pydantic-settings==2.1.0
+python-multipart==0.0.6
+python-jose[cryptography]==3.3.0
+passlib[bcrypt]==1.7.4
+python-dotenv==1.0.0
+
+# Database
+sqlalchemy==2.0.23
+aiomysql==0.2.0
+pymysql==1.1.0
+alembic==1.12.1
+
+# Redis
+redis==5.0.1
+
+# HTTP client
+httpx==0.25.2
+aiofiles==23.2.1
+
+# Logging
+structlog==23.2.0
+
+# CORS
+fastapi-cors==0.0.6
+
+# Utils
+python-dateutil==2.8.2
+
+# Excel文件处理（用于课程资料预览）
+openpyxl==3.1.2

backend/requirements/dev.txt

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+# Include base requirements
+-r base.txt
+
+# Testing
+pytest==7.4.3
+pytest-asyncio==0.21.1
+pytest-cov==4.1.0
+httpx==0.25.2
+aiosqlite==0.19.0
+
+# Code quality
+black==23.11.0
+isort==5.12.0
+flake8==6.1.0
+mypy==1.7.1
+types-python-dateutil==2.8.19.14
+types-redis==4.6.0.11
+
+# Development tools
+ipython==8.18.1
+watchfiles==0.21.0

backend/requirements/prod.txt

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+# 包含基础依赖
+-r base.txt
+
+# 生产环境监控
+prometheus-client==0.19.0
+sentry-sdk[fastapi]==1.39.1
+
+# 性能优化
+orjson==3.9.10
+ujson==5.9.0