fix: restore rag chat permission feedback

fastapi_modules/fastapi_leaudit/services/impl/ragChatServiceImpl.py

@@ -1,3 +1,5 @@
+"""RAG 聊天服务实现。"""
+
 from __future__ import annotations
 
 import asyncio
@@ -49,6 +51,8 @@ MANUAL_TITLE_SOURCE = "manual"
 
 
 class RagChatServiceImpl(IRagChatService):
+    """RAG 聊天服务实现。"""
+
     _message_tasks: dict[str, asyncio.Task] = {}
     _task_events: dict[str, list[dict]] = {}
     _task_done: dict[str, bool] = {}
@@ -1143,14 +1147,17 @@ class RagChatServiceImpl(IRagChatService):
                 except Exception:
                     followups = []
 
+                sources = self._build_sources(context_chunks, dataset_name)
                 if message_end_payload:
-                    message_end_payload.setdefault("metadata", {})["suggested_questions"] = followups
+                    message_end_metadata = message_end_payload.setdefault("metadata", {})
+                    message_end_metadata["suggested_questions"] = followups
+                    message_end_metadata["retriever_resources"] = sources
                     await self._append_task_event(task_id, message_end_payload)
                 await self._finalize_message_record(
                     conversation_id=conversation_id,
                     message_id=message_id,
                     content=collected_answer,
-                    sources=self._build_sources(context_chunks, dataset_name),
+                    sources=sources,
                     metadata={"suggested_questions": followups, "status": "completed", "task_id": task_id},
                 )
                 await self._maybe_schedule_auto_title(