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/app/core/security.py

@@ -0,0 +1,72 @@
+"""
+安全相关功能
+"""
+
+from datetime import datetime, timedelta
+from typing import Any, Dict, Optional, Union
+
+import bcrypt
+from jose import JWTError, jwt
+
+from .config import settings
+
+
+def create_access_token(
+    subject: Union[str, Any],
+    expires_delta: Optional[timedelta] = None,
+) -> str:
+    """创建访问令牌"""
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(
+            minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES
+        )
+
+    to_encode = {"exp": expire, "sub": str(subject), "type": "access"}
+    encoded_jwt = jwt.encode(
+        to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM
+    )
+    return encoded_jwt
+
+
+def create_refresh_token(
+    subject: Union[str, Any],
+    expires_delta: Optional[timedelta] = None,
+) -> str:
+    """创建刷新令牌"""
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(days=settings.REFRESH_TOKEN_EXPIRE_DAYS)
+
+    to_encode = {"exp": expire, "sub": str(subject), "type": "refresh"}
+    encoded_jwt = jwt.encode(
+        to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM
+    )
+    return encoded_jwt
+
+
+def decode_token(token: str) -> Dict[str, Any]:
+    """解码令牌"""
+    try:
+        payload = jwt.decode(
+            token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM]
+        )
+        return payload
+    except JWTError:
+        raise ValueError("Invalid token")
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    """验证密码"""
+    return bcrypt.checkpw(
+        plain_password.encode("utf-8"), hashed_password.encode("utf-8")
+    )
+
+
+def get_password_hash(password: str) -> str:
+    """生成密码哈希"""
+    salt = bcrypt.gensalt()
+    hashed_password = bcrypt.hashpw(password.encode("utf-8"), salt)
+    return hashed_password.decode("utf-8")