fix: remove unused imports + duplicate breadcrumb

src/layouts/AdminLayout.tsx

@@ -20,7 +20,6 @@ const breadcrumbMap: Record<string, string> = {
   '/imports': '文档导入',
   '/files': '文件与 COS',
   '/settings': '系统配置',
-  '/knowledge/bases': '知识库列表',
   '/billing': 'API 用量',
   '/git': '代码仓库',
   '/servers': '服务器运维',

src/pages/KnowledgeBases.tsx

@@ -1,11 +1,11 @@
 import { useState } from 'react'
 import { useQuery, useQueryClient } from '@tanstack/react-query'
-import { Table, Tag, Typography, Button, Space, App, Input } from 'antd'
+import { Table, Tag, Typography, Button, Space, App } from 'antd'
 import { ReloadOutlined, EyeOutlined, DeleteOutlined } from '@ant-design/icons'
 import { getKnowledgeBases, deleteKnowledgeBase, type KnowledgeBase } from '@/services/knowledge-api'
 import dayjs from 'dayjs'
 
-const { Title, Text } = Typography
+const { Title } = Typography
 
 function KBPage() {
   const { modal, message } = App.useApp()