Fix 法规对话

backend/app/api/routes/agent.py

@@ -2,7 +2,6 @@
 
 from __future__ import annotations
 
-import asyncio
 import json
 from typing import AsyncGenerator, List, Optional
 
@@ -20,6 +19,7 @@ from app.api.models import (
     SessionInfo,
 )
 from app.config.settings import settings
+from app.shared.async_utils import iter_in_thread
 from app.shared.bootstrap import get_agent_conversation_service, get_conversation_store
 # Keep route handlers close to their transport-layer wiring for easier auditing.
 
@@ -101,14 +101,13 @@ async def chat_stream_get(
                 top_k=settings.rag_top_k,
             )
             yield f"event: session\ndata: {json.dumps({'session_id': session_id_})}\n\n"
-            for event_data in event_stream:
+            async for event_data in iter_in_thread(event_stream):
                 event_type = event_data.get("event", "content")
                 data = event_data.get("data", "")
                 if isinstance(data, (dict, list)):
                     yield f"event: {event_type}\ndata: {json.dumps(data, ensure_ascii=False)}\n\n"
                 else:
                     yield f"event: {event_type}\ndata: {data}\n\n"
-                await asyncio.sleep(0)
         except Exception as exc:
             yield f"event: error\ndata: {str(exc)}\n\n"