[backend] fix: 修复projects.py和conftest.py中的类型和导入问题

backend/src/routes/projects.py.backup

@@ -1,6 +1,6 @@
-from fastapi import APIRouter, Depends, Query
+from fastapi import APIRouter, Depends, Query, HTTPException, status
 from sqlalchemy.ext.asyncio import AsyncSession
-from sqlalchemy import select, func, and_, desc, asc
+from sqlalchemy import select, func, and_
 from config.database import get_db
 from src.models.user import User
 from src.models.project import Project

backend/tests/conftest.py

@@ -10,8 +10,16 @@ from httpx import AsyncClient
 from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine, async_sessionmaker
 from sqlalchemy.pool import StaticPool
 
+try:
+    from src.main import app
+except ImportError:
     from main import app
-from config.database import Base, get_db
+
+try:
+    from src.config.database import get_db
+except ImportError:
+    from config.database import get_db
+
 from src.models.user import User
 from src.utils.password import hash_password