diff --git a/src/pages/_components/column-wrapper/index.tsx b/src/pages/_components/column-wrapper/index.tsx
index be772fc0..46c52308 100644
--- a/src/pages/_components/column-wrapper/index.tsx
+++ b/src/pages/_components/column-wrapper/index.tsx
@@ -1,8 +1,28 @@
 import useOverlayScroller from '@/hooks/use-overlay-scroller';
 import React, { useCallback } from 'react';
-import './style.less';
+import styled from 'styled-components';
 import { WrapperContext } from './use-wrapper-context';
 
+const Wrapper = styled.div`
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  justify-content: space-between;
+  position: relative;
+  width: 100%;
+`;
+
+const ContentWrapper = styled.div`
+  flex: 1;
+  position: relative;
+  overflow-y: auto;
+`;
+
+const Footer = styled.div`
+  padding-block: 0;
+  background-color: var(--ant-color-bg-elevated);
+`;
+
 interface ColumnWrapperProps {
   children: React.ReactNode;
   footer?: React.ReactNode;
@@ -44,29 +64,8 @@ const ColumnWrapper: React.FC<ColumnWrapperProps> = ({
     }
   }, []);
 
-  React.useLayoutEffect(() => {
-    if (!scroller.current || !footerRef.current || !contentRef.current) return;
-
-    const updatePadding = () => {
-      const height = footerRef.current!.getBoundingClientRect().height;
-      contentRef.current!.style.paddingBottom = `${height - 22}px`;
-    };
-
-    updatePadding();
-
-    const observer = new ResizeObserver(updatePadding);
-    observer.observe(footerRef.current);
-
-    return () => observer.disconnect();
-  }, []);
-
   const setContentPaddingBottom = useCallback((padding: number) => {
-    if (footerRef.current) {
-      const height = footerRef.current.getBoundingClientRect().height;
-      contentRef.current!.style.paddingBottom = `${height + padding - 22}px`;
-    } else {
-      contentRef.current!.style.paddingBottom = `${padding}px`;
-    }
+    contentRef.current!.style.paddingBottom = `${padding}px`;
   }, []);
 
   return (
@@ -81,25 +80,18 @@ const ColumnWrapper: React.FC<ColumnWrapperProps> = ({
         setSScrollContentPaddingBottom: setContentPaddingBottom
       }}
     >
-      <div
-        className="column-wrapper-footer"
-        style={{ height: maxHeight || '100%', ...styles.wrapper }}
-      >
-        <div
-          className="column-wrapper"
+      <Wrapper style={{ height: maxHeight || '100%', ...styles.wrapper }}>
+        <ContentWrapper
           ref={scroller}
-          style={{ padding: '16px 24px', ...styles.container }}
+          style={{
+            padding: '16px 24px',
+            ...styles.container
+          }}
         >
-          <div ref={contentRef} className="child-content">
-            {children}
-          </div>
-        </div>
-        {footer && (
-          <div className="footer" ref={footerRef}>
-            {footer}
-          </div>
-        )}
-      </div>
+          <div ref={contentRef}>{children}</div>
+        </ContentWrapper>
+        {footer && <Footer ref={footerRef}>{footer}</Footer>}
+      </Wrapper>
     </WrapperContext.Provider>
   );
 };
diff --git a/src/pages/_components/column-wrapper/style.less b/src/pages/_components/column-wrapper/style.less
deleted file mode 100644
index 5770f24f..00000000
--- a/src/pages/_components/column-wrapper/style.less
+++ /dev/null
@@ -1,32 +0,0 @@
-.column-wrapper {
-  flex: 1;
-  position: relative;
-  height: 100%;
-  overflow-y: auto;
-}
-
-.simplebar-scrollbar::before {
-  width: var(--scrollbar-size);
-  background: var(--scrollbar-handle-bg);
-}
-
-.column-wrapper-footer {
-  flex: 1;
-  display: flex;
-  position: relative;
-  width: 100%;
-
-  .column-wrapper {
-    border-left: none;
-  }
-
-  .footer {
-    position: absolute;
-    bottom: 0;
-    left: 0;
-    right: 0;
-    z-index: 100;
-    padding-block: 0;
-    background-color: var(--ant-color-bg-elevated);
-  }
-}
diff --git a/src/pages/api-keys/components/add-apikey-modal/index.tsx b/src/pages/api-keys/components/add-apikey-modal/index.tsx
index a5ec408c..1c5a1879 100644
--- a/src/pages/api-keys/components/add-apikey-modal/index.tsx
+++ b/src/pages/api-keys/components/add-apikey-modal/index.tsx
@@ -16,6 +16,12 @@ import { expirationOptions } from '../../config';
 import { FormData, ListItem } from '../../config/types';
 import APIKeyForm from './form';
 
+const ModalFooterStyle = {
+  padding: '16px 24px 8px',
+  display: 'flex',
+  justifyContent: 'flex-end'
+};
+
 type AddModalProps = {
   title: string;
   action: PageActionType;
@@ -209,16 +215,15 @@ const AddModal: React.FC<AddModalProps> = ({
     >
       <ColumnWrapper
         styles={{
-          container: { paddingTop: 0 }
+          container: { paddingBlock: 0 }
         }}
         footer={
           !showKey ? (
             <>
               {isChanged && (
-                <div style={{ marginInline: 24 }}>
+                <div style={{ marginInline: 24, paddingTop: 8 }}>
                   <AlertBlockInfo
                     type="warning"
-                    style={{ marginBottom: 16 }}
                     contentStyle={{ paddingInline: 0 }}
                     message={intl.formatMessage({
                       id: 'models.button.accessSettings.tips'
@@ -230,11 +235,7 @@ const AddModal: React.FC<AddModalProps> = ({
                 onOk={handleSumit}
                 onCancel={onCancel}
                 loading={loading}
-                style={{
-                  padding: '16px 24px',
-                  display: 'flex',
-                  justifyContent: 'flex-end'
-                }}
+                style={ModalFooterStyle}
               ></ModalFooter>
             </>
           ) : (
@@ -245,11 +246,7 @@ const AddModal: React.FC<AddModalProps> = ({
                 loading={loading}
                 okText={intl.formatMessage({ id: 'common.button.done' })}
                 showCancelBtn={false}
-                style={{
-                  padding: '16px 24px',
-                  display: 'flex',
-                  justifyContent: 'flex-end'
-                }}
+                style={ModalFooterStyle}
               ></ModalFooter>
             </>
           )
diff --git a/src/pages/backends/components/add-modal.tsx b/src/pages/backends/components/add-modal.tsx
index d5e75ca3..eb8dbe4f 100644
--- a/src/pages/backends/components/add-modal.tsx
+++ b/src/pages/backends/components/add-modal.tsx
@@ -20,7 +20,7 @@ import BackendForm from '../forms';
 import ImportYAML from './import-yaml';
 
 const ModalFooterStyle = {
-  padding: '16px 24px',
+  padding: '16px 24px 8px',
   display: 'flex',
   justifyContent: 'flex-end'
 };
@@ -220,7 +220,7 @@ const AddModal: React.FC<AddModalProps> = (props) => {
         maxHeight={'calc(100vh - 140px)'}
         styles={{
           container: {
-            paddingTop: 0
+            paddingBlock: 0
           }
         }}
         footer={
diff --git a/src/pages/llmodels/components/compatible-alert.tsx b/src/pages/llmodels/components/compatible-alert.tsx
index 250784a5..3ce8825e 100644
--- a/src/pages/llmodels/components/compatible-alert.tsx
+++ b/src/pages/llmodels/components/compatible-alert.tsx
@@ -26,7 +26,7 @@ interface CompatibilityAlertProps {
 const DivWrapper = styled.div`
   position: relative;
   padding-inline: 24px;
-  padding-block: 10px 0;
+  padding-block: 8px 0;
   &:hover {
     .close-wrapper {
       display: block;
diff --git a/src/pages/llmodels/components/deploy-builtin-modal.tsx b/src/pages/llmodels/components/deploy-builtin-modal.tsx
index 2ff62fc7..00cecebf 100644
--- a/src/pages/llmodels/components/deploy-builtin-modal.tsx
+++ b/src/pages/llmodels/components/deploy-builtin-modal.tsx
@@ -357,7 +357,7 @@ const AddModal: React.FC<AddModalProps> = (props) => {
           <ColumnWrapper
             styles={{
               container: {
-                paddingTop: 0
+                paddingBlock: 0
               }
             }}
             footer={
@@ -387,7 +387,7 @@ const AddModal: React.FC<AddModalProps> = (props) => {
                     )
                   }
                   style={{
-                    padding: '16px 24px',
+                    padding: '16px 24px 8px',
                     display: 'flex',
                     justifyContent: 'flex-end'
                   }}
diff --git a/src/pages/llmodels/components/deploy-modal.tsx b/src/pages/llmodels/components/deploy-modal.tsx
index e2ad6e8f..4959659d 100644
--- a/src/pages/llmodels/components/deploy-modal.tsx
+++ b/src/pages/llmodels/components/deploy-modal.tsx
@@ -41,7 +41,7 @@ const dropFieldsFromForm = [
 const resetFields = ['worker_selector', 'env'];
 
 const ModalFooterStyle = {
-  padding: '16px 24px',
+  padding: '16px 24px 8px',
   display: 'flex',
   justifyContent: 'flex-end'
 };
@@ -586,7 +586,7 @@ const AddModal: FC<AddModalProps> = (props) => {
         <FormWrapper>
           <ColumnWrapper
             styles={{
-              container: { paddingTop: 0 }
+              container: { paddingBlock: 0 }
             }}
             footer={
               <>
diff --git a/src/pages/llmodels/components/update-modal.tsx b/src/pages/llmodels/components/update-modal.tsx
index dd4f4b41..ee46c82a 100644
--- a/src/pages/llmodels/components/update-modal.tsx
+++ b/src/pages/llmodels/components/update-modal.tsx
@@ -35,7 +35,7 @@ type AddModalProps = {
 };
 
 const ModalFooterStyle = {
-  padding: '16px 24px',
+  padding: '16px 24px 8px',
   display: 'flex',
   justifyContent: 'flex-end'
 };
@@ -249,7 +249,7 @@ const UpdateModal: React.FC<AddModalProps> = (props) => {
       <ColumnWrapper
         styles={{
           container: {
-            paddingTop: 0
+            paddingBlock: 0
           }
         }}
         footer={
diff --git a/src/pages/llmodels/config/backend-parameters/vllm.ts b/src/pages/llmodels/config/backend-parameters/vllm.ts
index ac6f4012..fb8df9e3 100644
--- a/src/pages/llmodels/config/backend-parameters/vllm.ts
+++ b/src/pages/llmodels/config/backend-parameters/vllm.ts
@@ -490,6 +490,7 @@ const options: BackendParameter[] = [
       'quark',
       'moe_wna16',
       'torchao',
+      'ascend',
       'None'
     ]
   },
diff --git a/src/pages/llmodels/config/index.ts b/src/pages/llmodels/config/index.ts
index 1a93c238..8f5a828d 100644
--- a/src/pages/llmodels/config/index.ts
+++ b/src/pages/llmodels/config/index.ts
@@ -375,7 +375,7 @@ export const defaultFormValues = {
   gpu_selector: {},
   worker_selector: {},
   backend_parameters: [],
-  backend_version: ''
+  backend_version: null
 };
 
 export const getBackendParamsTips = (backend: string) => {
diff --git a/src/pages/llmodels/download/index.tsx b/src/pages/llmodels/download/index.tsx
index 411e1276..7f766fd3 100644
--- a/src/pages/llmodels/download/index.tsx
+++ b/src/pages/llmodels/download/index.tsx
@@ -207,7 +207,7 @@ const DownloadModel: React.FC<AddModalProps> = (props) => {
         <FormWrapper>
           <ColumnWrapper
             styles={{
-              container: { paddingTop: 0 }
+              container: { paddingBlock: 0 }
             }}
             footer={
               <>
@@ -218,7 +218,7 @@ const DownloadModel: React.FC<AddModalProps> = (props) => {
                     loading: loading
                   }}
                   style={{
-                    padding: '16px 24px',
+                    padding: '16px 24px 8px',
                     display: 'flex',
                     justifyContent: 'flex-end'
                   }}
diff --git a/src/pages/llmodels/forms/backend.tsx b/src/pages/llmodels/forms/backend.tsx
index b4016887..f26d5146 100644
--- a/src/pages/llmodels/forms/backend.tsx
+++ b/src/pages/llmodels/forms/backend.tsx
@@ -118,6 +118,11 @@ const BackendFields: React.FC = () => {
     return option.title;
   };
 
+  const backendVersionLabelRender = (option: any) => {
+    console.log('backendVersionLabelRender option:', option);
+    return option.title;
+  };
+
   const renderVersionOptions = (values: any[], label: string) => {
     if (!values || values.length === 0) {
       return null;
@@ -188,7 +193,8 @@ const BackendFields: React.FC = () => {
           <SealSelect
             allowClear
             showSearch
-            labelRender={labelRender}
+            allowNull
+            labelRender={backendVersionLabelRender}
             placeholder={intl.formatMessage({
               id: 'models.form.backendVersion.holder'
             })}
@@ -216,6 +222,19 @@ const BackendFields: React.FC = () => {
               </dl>
             }
           >
+            {(backendVersions.builtIn.length > 0 ||
+              backendVersions.custom.length > 0) && (
+              <Select.Option
+                key="auto"
+                value={null}
+                title={intl.formatMessage({ id: 'common.options.auto' })}
+                label={intl.formatMessage({
+                  id: 'common.options.auto'
+                })}
+              >
+                {intl.formatMessage({ id: 'common.options.auto' })}
+              </Select.Option>
+            )}
             {renderVersionOptions(
               backendVersions.builtIn,
               intl.formatMessage({ id: 'backend.builtin' })
diff --git a/src/pages/llmodels/forms/index.tsx b/src/pages/llmodels/forms/index.tsx
index 6c6e0d01..b3b8e429 100644
--- a/src/pages/llmodels/forms/index.tsx
+++ b/src/pages/llmodels/forms/index.tsx
@@ -95,8 +95,7 @@ const DataForm: React.FC<DataFormProps> = forwardRef((props, ref) => {
     onClusterChange,
     onOk
   } = props;
-  const { getScrollElementScrollableHeight, osInstance, scrollEventElement } =
-    useWrapperContext();
+  const { getScrollElementScrollableHeight } = useWrapperContext();
   const { backendOptions, getBackendOptions } = useQueryBackends();
   const { getGPUOptionList, gpuOptions, workerLabelOptions } =
     useGenerateGPUOptions();
@@ -105,8 +104,6 @@ const DataForm: React.FC<DataFormProps> = forwardRef((props, ref) => {
   const [activeKey, setActiveKey] = React.useState<string[]>([]);
   const [target, setTarget] = React.useState<string>(TABKeysMap.BASIC);
 
-  console.log('scroller instance in form:', osInstance, scrollEventElement);
-
   const segmentOptions = [
     {
       value: TABKeysMap.BASIC,
@@ -226,7 +223,7 @@ const DataForm: React.FC<DataFormProps> = forwardRef((props, ref) => {
     });
     form.setFieldsValue({
       env: null,
-      backend_version: '', // don't set default version here, let the user select it
+      backend_version: null, // don't set default version here, let the user select it
       backend_parameters: option.default_backend_param || [],
       ...updateKVCacheConfig(val, option),
       ...updateGPUSelector(val)
@@ -454,7 +451,8 @@ const DataForm: React.FC<DataFormProps> = forwardRef((props, ref) => {
             ngram_max_match_length:
               initialValues?.speculative_config?.ngram_max_match_length || 10
           },
-          ...initialValues
+          ...initialValues,
+          backend_version: initialValues?.backend_version || null
         }}
       >
         <BasicForm
diff --git a/src/pages/llmodels/forms/schedule-type.tsx b/src/pages/llmodels/forms/schedule-type.tsx
index f22dc6c3..d9d484b1 100644
--- a/src/pages/llmodels/forms/schedule-type.tsx
+++ b/src/pages/llmodels/forms/schedule-type.tsx
@@ -4,7 +4,6 @@ import SealCascader from '@/components/seal-form/seal-cascader';
 import SealSelect from '@/components/seal-form/seal-select';
 import TooltipList from '@/components/tooltip-list';
 import useAppUtils from '@/hooks/use-app-utils';
-import { useWrapperContext } from '@/pages/_components/column-wrapper/use-wrapper-context';
 import { useIntl } from '@umijs/max';
 import { Form, InputNumber } from 'antd';
 import _ from 'lodash';
@@ -72,8 +71,6 @@ const ScheduleTypeForm: React.FC = () => {
     clearCacheFormValues,
     initialValues
   } = useFormContext();
-  const { setSScrollContentPaddingBottom, getScrollElementScrollableHeight } =
-    useWrapperContext();
   const { getRuleMessage } = useAppUtils();
   const form = Form.useFormInstance();
   const scheduleType = Form.useWatch('scheduleType', form);
@@ -82,29 +79,6 @@ const ScheduleTypeForm: React.FC = () => {
     ['gpu_selector', 'gpus_per_replica'],
     form
   );
-  const gpuSekectorElRef = React.useRef<HTMLElement | null>(null);
-
-  const setContentPaddingBottom = () => {
-    if (!gpuSekectorElRef.current) {
-      gpuSekectorElRef.current = document.querySelector(
-        '[data-field="gpu_selector.gpu_ids"]'
-      );
-    }
-    if (gpuSekectorElRef.current) {
-      const { scrollHeight, scrollTop } =
-        getScrollElementScrollableHeight?.() || {
-          scrollHeight: 0,
-          scrollTop: 0
-        };
-
-      const rect = gpuSekectorElRef.current.getBoundingClientRect();
-      const bottomSpace =
-        window.innerHeight - rect.bottom + (scrollHeight - scrollTop);
-      if (bottomSpace < 340) {
-        setSScrollContentPaddingBottom?.(340 - bottomSpace);
-      }
-    }
-  };
 
   const handleScheduleTypeChange = async (value: string) => {
     await new Promise((resolve) => {
@@ -118,11 +92,9 @@ const ScheduleTypeForm: React.FC = () => {
         gpu_ids: [],
         gpus_per_replica: null
       });
-      requestAnimationFrame(() => {
-        setContentPaddingBottom();
-      });
     }
   };
+
   const handleGpusPerReplicasChange = (val: string | number | null) => {
     if (val === null) {
       form.setFieldValue(['gpu_selector', 'gpus_per_replica'], null);
diff --git a/src/pages/playground/hooks/use-chat-completion.ts b/src/pages/playground/hooks/use-chat-completion.ts
index b248bbb1..cb479149 100644
--- a/src/pages/playground/hooks/use-chat-completion.ts
+++ b/src/pages/playground/hooks/use-chat-completion.ts
@@ -43,6 +43,7 @@ export default function useChatCompletion(
   };
 
   const joinMessage = (chunk: any) => {
+    console.log('chunk:', chunk);
     setTokenResult({
       ...(chunk?.usage ?? {})
     });