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/tests/conftest.py

@@ -0,0 +1,100 @@
+"""测试配置和fixtures"""
+import asyncio
+from typing import AsyncGenerator, Generator
+import pytest
+from httpx import AsyncClient
+from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine, async_sessionmaker
+
+from app.main import app
+from app.models.base import Base
+from app.config.database import SessionLocal
+from app.core.deps import get_db
+
+
+# 测试数据库URL
+TEST_DATABASE_URL = "sqlite+aiosqlite:///:memory:"
+
+# 创建测试引擎
+test_engine = create_async_engine(
+    TEST_DATABASE_URL,
+    connect_args={"check_same_thread": False}
+)
+
+# 创建测试会话工厂
+TestSessionLocal = async_sessionmaker(
+    test_engine,
+    class_=AsyncSession,
+    expire_on_commit=False,
+    autocommit=False,
+    autoflush=False
+)
+
+
+@pytest.fixture(scope="session")
+def event_loop() -> Generator:
+    """创建事件循环"""
+    loop = asyncio.get_event_loop_policy().new_event_loop()
+    yield loop
+    loop.close()
+
+
+@pytest.fixture(scope="function")
+async def db_session() -> AsyncGenerator[AsyncSession, None]:
+    """创建测试数据库会话"""
+    async with test_engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+    
+    async with TestSessionLocal() as session:
+        yield session
+        await session.rollback()
+    
+    async with test_engine.begin() as conn:
+        await conn.run_sync(Base.metadata.drop_all)
+
+
+@pytest.fixture(scope="function")
+async def client(db_session: AsyncSession) -> AsyncGenerator[AsyncClient, None]:
+    """创建测试客户端"""
+    async def override_get_db():
+        yield db_session
+    
+    app.dependency_overrides[get_db] = override_get_db
+    
+    async with AsyncClient(app=app, base_url="http://test") as ac:
+        yield ac
+    
+    app.dependency_overrides.clear()
+
+
+@pytest.fixture
+def test_user():
+    """测试用户"""
+    return {
+        "id": 1,
+        "username": "test_user",
+        "role": "user",
+        "token": "test_token"
+    }
+
+
+@pytest.fixture
+def test_admin():
+    """测试管理员"""
+    return {
+        "id": 2,
+        "username": "test_admin",
+        "role": "admin",
+        "token": "admin_token"
+    }
+
+
+@pytest.fixture
+def auth_headers(test_user):
+    """认证请求头"""
+    return {"Authorization": f"Bearer {test_user['token']}"}
+
+
+@pytest.fixture
+def admin_auth_headers(test_admin):
+    """管理员认证请求头"""
+    return {"Authorization": f"Bearer {test_admin['token']}"}