fix(api): 修复projects.py中DELETE接口204响应体问题

添加response_class=Response，确保204响应无body。

apps/api/app/api/routes/projects.py

@@ -7,7 +7,7 @@ from app.schemas.project import (
     ListProjectsResponse,
     ProjectResponse,
 )
-from fastapi import APIRouter, Depends, HTTPException, status
+from fastapi import APIRouter, Depends, HTTPException, status, Response
 
 from packages.application import (
     CreateProjectCommand,
@@ -72,7 +72,7 @@ def create_project(
     return _to_project_response(project)
 
 
-@router.delete("/{project_id}")
+@router.delete("/{project_id}", status_code=status.HTTP_204_NO_CONTENT, response_class=Response)
 def delete_project(
     project_id: str,
     authenticated_user: AuthenticatedUser = Depends(get_current_user),
@@ -88,4 +88,4 @@ def delete_project(
         )
     if not deleted:
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Project not found")
-    return {"message": "Project deleted successfully"}
+    return