Initial commit: TradeMate 外贸小助手 MVP

项目结构:
- backend/     Python FastAPI 后端
- uni-app/     uni-app跨端前端
- docs/        设计文档
- docker-compose.yml  Docker编排
- nginx/scripts/systemd 运维配置

已完成功能:
- 用户认证 (JWT)
- 智能翻译 + 回复建议
- 营销素材生成
- 客户管理 + 沉默检测
- 报价单管理
- 产品库管理
- 汇率换算
- 推送通知 (uni-push)
- WhatsApp Webhook框架
- Celery定时任务

backend/tests/conftest.py

@@ -0,0 +1,81 @@
+import pytest
+import asyncio
+from typing import AsyncGenerator
+from httpx import AsyncClient, ASGITransport
+from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine
+from sqlalchemy.orm import sessionmaker
+import sys
+import os
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from app.main import app
+from app.database import Base, get_db
+from app.models.user import User
+from app.core.security import hash_password
+
+
+TEST_DATABASE_URL = "postgresql+asyncpg://admin:dWFNi67nHNbPbjmP@localhost:5432/foreign_trade_test"
+
+test_engine = create_async_engine(TEST_DATABASE_URL, echo=False)
+TestAsyncSessionLocal = sessionmaker(
+    test_engine,
+    class_=AsyncSession,
+    expire_on_commit=False,
+)
+
+
+@pytest.fixture(scope="session")
+def event_loop():
+    loop = asyncio.get_event_loop_policy().new_event_loop()
+    yield loop
+    loop.close()
+
+
+@pytest.fixture(scope="function")
+async def db_session() -> AsyncGenerator[AsyncSession, None]:
+    async with test_engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+
+    async with TestAsyncSessionLocal() as session:
+        yield session
+
+    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]:
+    async def override_get_db():
+        yield db_session
+
+    app.dependency_overrides[get_db] = override_get_db
+
+    async with AsyncClient(
+        transport=ASGITransport(app=app),
+        base_url="http://test"
+    ) as ac:
+        yield ac
+
+    app.dependency_overrides.clear()
+
+
+@pytest.fixture
+async def test_user(db_session: AsyncSession) -> User:
+    user = User(
+        phone="13800138000",
+        username="test_user",
+        password_hash=hash_password("test123456"),
+        tier="free",
+    )
+    db_session.add(user)
+    await db_session.commit()
+    await db_session.refresh(user)
+    return user
+
+
+@pytest.fixture
+async def auth_headers(test_user: User) -> dict:
+    from app.core.security import create_access_token
+    token = create_access_token({"sub": str(test_user.id), "tier": test_user.tier})
+    return {"Authorization": f"Bearer {token}"}