fix: empty docs error in KnowledgeFile

server/knowledge_base/utils.py

@@ -311,6 +311,9 @@ class KnowledgeFile:
             else:
                 docs = text_splitter.split_documents(docs)
 
+        if not docs:
+            return []
+
         print(f"文档切分示例：{docs[0]}")
         if zh_title_enhance:
             docs = func_zh_title_enhance(docs)