feat：优化流式输出，增加临时多轮对话记录

app/api/conversations.py

@@ -0,0 +1,30 @@
+"""会话创建与历史查询接口"""
+
+from fastapi import APIRouter, Request
+
+from app.common.response import ApiResponse, success_response
+from app.core.exceptions import BizException
+from app.schemas.conversation import ConversationCreated, ConversationDetail
+
+router = APIRouter(prefix="/conversations", tags=["Conversation"])
+
+
+@router.post("")
+async def create_conversation(
+    request: Request,
+) -> ApiResponse[ConversationCreated]:
+    store = request.app.state.conversation_store
+    return success_response(ConversationCreated(conversation_id=await store.create()))
+
+
+@router.get("/{conversation_id}")
+async def get_conversation(
+    conversation_id: str, request: Request
+) -> ApiResponse[ConversationDetail]:
+    store = request.app.state.conversation_store
+    if not await store.exists(conversation_id):
+        raise BizException(404, "会话不存在或已过期")
+    turns = await store.load_turns(conversation_id, None)
+    return success_response(
+        ConversationDetail(conversation_id=conversation_id, turns=turns)
+    )