优化

backend/app/main.py

@@ -156,10 +156,25 @@ async def read_task(task_id: str) -> JSONResponse:
     task["requirements_markdown"] = requirements or None
     completion_checklist = store.read_completion_checklist(task["task_id"])
     task["completion_checklist_markdown"] = completion_checklist or None
+    modeling_plan = store.read_modeling_plan(task["task_id"])
+    task["modeling_plan_markdown"] = modeling_plan or None
+    task["modeling_plan_review"] = store.read_modeling_plan_review(task["task_id"])
     task["agent_state"] = store.read_agent_state(task["task_id"])
     return JSONResponse(task)
 
 
+@app.delete("/v1/tasks/{task_id}")
+async def cancel_task(task_id: str) -> JSONResponse:
+    try:
+        safe_id = safe_task_id(task_id)
+        task = await agent.cancel(safe_id)
+    except ValueError as error:
+        raise HTTPException(status_code=400, detail=str(error)) from error
+    if task is None:
+        raise HTTPException(status_code=404, detail="Task not found")
+    return JSONResponse(task)
+
+
 @app.get("/v1/tasks/{task_id}/artifacts/{artifact_path:path}")
 async def read_artifact(task_id: str, artifact_path: str) -> StreamingResponse:
     from fastapi.responses import FileResponse