diff --git a/src/pages/KnowledgeBase/Detail/components/DocumentList.jsx b/src/pages/KnowledgeBase/Detail/components/DocumentList.jsx
index f7fe2a5..bdf5ee7 100644
--- a/src/pages/KnowledgeBase/Detail/components/DocumentList.jsx
+++ b/src/pages/KnowledgeBase/Detail/components/DocumentList.jsx
@@ -73,7 +73,7 @@ const DocumentList = ({ knowledgeBaseId }) => {
                                 <td>
                                     <div className='btn-group' role='group'>
                                         <button
-                                            className='btn btn-sm btn-outline-primary me-2 d-none'
+                                            className='btn btn-sm btn-outline-dark me-2'
                                             onClick={() => handlePreviewDocument(doc.document_id)}
                                         >
                                             预览
diff --git a/src/pages/KnowledgeBase/Detail/components/DocumentPreviewModal.jsx b/src/pages/KnowledgeBase/Detail/components/DocumentPreviewModal.jsx
index 94973e2..1afea74 100644
--- a/src/pages/KnowledgeBase/Detail/components/DocumentPreviewModal.jsx
+++ b/src/pages/KnowledgeBase/Detail/components/DocumentPreviewModal.jsx
@@ -72,14 +72,14 @@ const DocumentPreviewModal = ({ show, documentId, knowledgeBaseId, onClose }) =>
                     maxWidth: '90%',
                     maxHeight: '80vh',
                     padding: '20px',
-                    overflow: 'auto',
+                    overflow: 'hidden',
                 }}
             >
                 <div className='modal-header d-flex justify-content-between align-items-center mb-3'>
                     <h5 className='modal-title m-0'>{documentContent?.document_info?.name || '文档预览'}</h5>
                     <button type='button' className='btn-close' onClick={onClose} aria-label='Close'></button>
                 </div>
-                <div className='modal-body'>
+                <div className='modal-body' style={{ overflow: 'auto' }}>
                     {loading ? (
                         <div className='text-center py-4'>
                             <div className='spinner-border text-primary' role='status'>
@@ -118,7 +118,7 @@ const DocumentPreviewModal = ({ show, documentId, knowledgeBaseId, onClose }) =>
                     )}
                 </div>
                 <div className='modal-footer'>
-                    <button type='button' className='btn btn-outline-secondary' onClick={onClose}>
+                    <button type='button' className='btn btn-outline-dark' onClick={onClose}>
                         关闭
                     </button>
                 </div>
diff --git a/src/pages/KnowledgeBase/Detail/components/KnowledgeBaseForm.jsx b/src/pages/KnowledgeBase/Detail/components/KnowledgeBaseForm.jsx
index d8502f8..e70ef13 100644
--- a/src/pages/KnowledgeBase/Detail/components/KnowledgeBaseForm.jsx
+++ b/src/pages/KnowledgeBase/Detail/components/KnowledgeBaseForm.jsx
@@ -127,7 +127,7 @@ const KnowledgeBaseForm = ({
                     </div>
 
                     {/* 仅当不是私有知识库时才显示部门选项 */}
-                    {formData.type === 'member' && (
+                    {formData.type === 'member' || formData.type === 'leader' && (
                         <div className='mb-3'>
                             <label htmlFor='department' className='form-label'>
                                 部门 {isAdmin && <span className='text-danger'>*</span>}
@@ -246,7 +246,7 @@ const KnowledgeBaseForm = ({
                     )}
 
                     <div className='d-flex justify-content-between mt-4'>
-                        <button type='submit' className='btn btn-primary' disabled={isSubmitting|| !formData.permissions.can_edit}>
+                        <button type='submit' className='btn btn-dark' disabled={isSubmitting|| !formData.permissions.can_edit}>
                             {isSubmitting ? (
                                 <>
                                     <span
@@ -262,7 +262,7 @@ const KnowledgeBaseForm = ({
                         </button>
                         <button
                             type='button'
-                            className='btn btn-danger'
+                            className='btn btn-outline-danger'
                             onClick={onDelete}
                             // disabled='true'
                             disabled={isSubmitting || !formData.permissions.can_edit}
diff --git a/src/store/chat/chat.thunks.js b/src/store/chat/chat.thunks.js
index 8bd1fa5..a50ff05 100644
--- a/src/store/chat/chat.thunks.js
+++ b/src/store/chat/chat.thunks.js
@@ -282,41 +282,63 @@ export const createChatRecord = createAsyncThunk(
                 // 获取知识库信息
                 const state = getState();
                 const availableDatasets = state.chat.availableDatasets.items || [];
+                const existingChats = state.chat.history.items || [];
 
-                // 创建一个新的聊天记录对象添加到历史列表
-                const newChatEntry = {
-                    conversation_id: chatInfo.conversation_id,
-                    datasets: dataset_id_list.map((id) => {
-                        // 尝试查找知识库名称
-                        const formattedId = id.includes('-')
-                            ? id
-                            : id.replace(/(.{8})(.{4})(.{4})(.{4})(.{12})/, '$1-$2-$3-$4-$5');
-                        const dataset = availableDatasets.find((ds) => ds.id === formattedId);
-                        return {
-                            id: formattedId,
-                            name: dataset?.name || '新知识库对话',
-                        };
-                    }),
-                    create_time: new Date().toISOString(),
-                    last_message: question,
-                    message_count: 2, // 用户问题和助手回复
-                };
+                // 检查是否已存在此会话ID的记录
+                const existingChat = existingChats.find((chat) => chat.conversation_id === chatInfo.conversation_id);
 
-                // 更新当前聊天
-                dispatch({
-                    type: 'chat/fetchChats/fulfilled',
-                    payload: {
-                        results: [newChatEntry],
-                        total: 1,
-                        append: true, // 标记为追加，而不是替换
-                    },
-                });
+                // 只有在不存在相同会话ID的记录时才创建新的记录
+                if (!existingChat) {
+                    console.log('创建新的聊天sidebar记录:', chatInfo.conversation_id);
+
+                    // 创建一个新的聊天记录对象添加到历史列表
+                    const newChatEntry = {
+                        conversation_id: chatInfo.conversation_id,
+                        datasets: dataset_id_list.map((id) => {
+                            // 尝试查找知识库名称
+                            const formattedId = id.includes('-')
+                                ? id
+                                : id.replace(/(.{8})(.{4})(.{4})(.{4})(.{12})/, '$1-$2-$3-$4-$5');
+                            const dataset = availableDatasets.find((ds) => ds.id === formattedId);
+                            return {
+                                id: formattedId,
+                                name: dataset?.name || '新知识库对话',
+                            };
+                        }),
+                        create_time: new Date().toISOString(),
+                        last_message: question,
+                        message_count: 2, // 用户问题和助手回复
+                    };
+
+                    // 更新当前聊天
+                    dispatch({
+                        type: 'chat/fetchChats/fulfilled',
+                        payload: {
+                            results: [newChatEntry],
+                            total: 1,
+                            append: true, // 标记为追加，而不是替换
+                        },
+                    });
+                } else {
+                    console.log('聊天sidebar记录已存在，不再创建:', chatInfo.conversation_id);
+                }
 
                 // 设置为当前聊天
                 dispatch(
                     setCurrentChat({
                         conversation_id: chatInfo.conversation_id,
-                        datasets: newChatEntry.datasets,
+                        datasets: existingChat
+                            ? existingChat.datasets
+                            : dataset_id_list.map((id) => {
+                                  const formattedId = id.includes('-')
+                                      ? id
+                                      : id.replace(/(.{8})(.{4})(.{4})(.{4})(.{12})/, '$1-$2-$3-$4-$5');
+                                  const dataset = availableDatasets.find((ds) => ds.id === formattedId);
+                                  return {
+                                      id: formattedId,
+                                      name: dataset?.name || '新知识库对话',
+                                  };
+                              }),
                     })
                 );
             }