Merge branch 'beta' into 'master'

fix: 知识库上传文件格式显示有误

See merge request !25

src/views/personal-space/personal-knowledge/columns.tsx

@@ -138,7 +138,7 @@ export function createKnowledgeDocumentColumn(
       },
       width: 236,
       render(row: KnowledgeDocumentItem) {
-        return row.documentName.split('.')[1].toUpperCase() || '--'
+        return row.documentName.split('.')?.pop()?.toLowerCase() || '--'
       },
     },
     {