diff --git a/src/renderer/src/pages/knowledge/components/KnowledgeSettingsPopup.tsx b/src/renderer/src/pages/knowledge/components/KnowledgeSettingsPopup.tsx
deleted file mode 100644
index 237c4a8bc..000000000
--- a/src/renderer/src/pages/knowledge/components/KnowledgeSettingsPopup.tsx
+++ /dev/null
@@ -1,326 +0,0 @@
-import { DownOutlined, WarningOutlined } from '@ant-design/icons'
-import { TopView } from '@renderer/components/TopView'
-import { DEFAULT_KNOWLEDGE_DOCUMENT_COUNT } from '@renderer/config/constant'
-import { getEmbeddingMaxContext } from '@renderer/config/embedings'
-import { isEmbeddingModel, isRerankModel } from '@renderer/config/models'
-import { NOT_SUPPORTED_REANK_PROVIDERS } from '@renderer/config/providers'
-// import { SUPPORTED_REANK_PROVIDERS } from '@renderer/config/providers'
-import { useKnowledge } from '@renderer/hooks/useKnowledge'
-import { useProviders } from '@renderer/hooks/useProvider'
-import { SettingHelpText } from '@renderer/pages/settings'
-import { getModelUniqId } from '@renderer/services/ModelService'
-import { KnowledgeBase } from '@renderer/types'
-import { Alert, Form, Input, InputNumber, Modal, Select, Slider } from 'antd'
-import { sortBy } from 'lodash'
-import { useEffect, useState } from 'react'
-import { useTranslation } from 'react-i18next'
-import styled from 'styled-components'
-
-interface ShowParams {
-  base: KnowledgeBase
-}
-
-interface FormData {
-  name: string
-  model: string
-  documentCount?: number
-  dimensions?: number
-  chunkSize?: number
-  chunkOverlap?: number
-  threshold?: number
-  rerankModel?: string
-}
-
-interface Props extends ShowParams {
-  resolve: (data: any) => void
-}
-
-const PopupContainer: React.FC<Props> = ({ base: _base, resolve }) => {
-  const [open, setOpen] = useState(true)
-  const [showAdvanced, setShowAdvanced] = useState(false)
-  const [form] = Form.useForm<FormData>()
-  const { t } = useTranslation()
-  const { providers } = useProviders()
-  const { base, updateKnowledgeBase } = useKnowledge(_base.id)
-
-  useEffect(() => {
-    form.setFieldsValue({ documentCount: base?.documentCount || 6 })
-  }, [base, form])
-
-  if (!base) {
-    resolve(null)
-    return null
-  }
-
-  const selectOptions = providers
-    .filter((p) => p.models.length > 0)
-    .map((p) => ({
-      label: p.isSystem ? t(`provider.${p.id}`) : p.name,
-      title: p.name,
-      options: sortBy(p.models, 'name')
-        .filter((model) => isEmbeddingModel(model) && !isRerankModel(model))
-        .map((m) => ({
-          label: m.name,
-          value: getModelUniqId(m)
-        }))
-    }))
-    .filter((group) => group.options.length > 0)
-
-  const rerankSelectOptions = providers
-    .filter((p) => p.models.length > 0)
-    .filter((p) => !NOT_SUPPORTED_REANK_PROVIDERS.includes(p.id))
-    .map((p) => ({
-      label: p.isSystem ? t(`provider.${p.id}`) : p.name,
-      title: p.name,
-      options: sortBy(p.models, 'name')
-        .filter((model) => isRerankModel(model))
-        .map((m) => ({
-          label: m.name,
-          value: getModelUniqId(m)
-        }))
-    }))
-    .filter((group) => group.options.length > 0)
-
-  const onOk = async () => {
-    try {
-      const values = await form.validateFields()
-      const newBase = {
-        ...base,
-        name: values.name,
-        documentCount: values.documentCount || DEFAULT_KNOWLEDGE_DOCUMENT_COUNT,
-        dimensions: values.dimensions || base.dimensions,
-        chunkSize: values.chunkSize,
-        chunkOverlap: values.chunkOverlap,
-        threshold: values.threshold ?? undefined,
-        rerankModel: values.rerankModel
-          ? providers.flatMap((p) => p.models).find((m) => getModelUniqId(m) === values.rerankModel)
-          : undefined
-      }
-      updateKnowledgeBase(newBase)
-      setOpen(false)
-      setTimeout(() => resolve(newBase), 350)
-    } catch (error) {
-      console.error('Validation failed:', error)
-    }
-  }
-
-  const onCancel = () => {
-    setOpen(false)
-  }
-
-  const onClose = () => {
-    resolve(null)
-  }
-
-  KnowledgeSettingsPopup.hide = onCancel
-
-  return (
-    <Modal
-      title={t('knowledge.settings')}
-      open={open}
-      onOk={onOk}
-      onCancel={onCancel}
-      afterClose={onClose}
-      destroyOnClose
-      maskClosable={false}
-      transitionName="animation-move-down"
-      centered>
-      <Form form={form} layout="vertical" className="compact-form">
-        <Form.Item
-          name="name"
-          label={t('common.name')}
-          initialValue={base.name}
-          rules={[{ required: true, message: t('message.error.enter.name') }]}>
-          <Input placeholder={t('common.name')} />
-        </Form.Item>
-
-        <Form.Item
-          name="model"
-          label={t('models.embedding_model')}
-          initialValue={getModelUniqId(base.model)}
-          tooltip={{ title: t('models.embedding_model_tooltip'), placement: 'right' }}
-          rules={[{ required: true, message: t('message.error.enter.model') }]}>
-          <Select style={{ width: '100%' }} options={selectOptions} placeholder={t('settings.models.empty')} disabled />
-        </Form.Item>
-
-        <Form.Item
-          name="rerankModel"
-          label={t('models.rerank_model')}
-          tooltip={{ title: t('models.rerank_model_tooltip'), placement: 'right' }}
-          initialValue={getModelUniqId(base.rerankModel) || undefined}
-          rules={[{ required: false, message: t('message.error.enter.model') }]}>
-          <Select
-            style={{ width: '100%' }}
-            options={rerankSelectOptions}
-            placeholder={t('settings.models.empty')}
-            allowClear
-          />
-        </Form.Item>
-        <SettingHelpText style={{ marginTop: -15, marginBottom: 20 }}>
-          {t('models.rerank_model_not_support_provider', {
-            provider: NOT_SUPPORTED_REANK_PROVIDERS.map((id) => t(`provider.${id}`))
-          })}
-        </SettingHelpText>
-
-        <Form.Item
-          name="documentCount"
-          label={t('knowledge.document_count')}
-          tooltip={{ title: t('knowledge.document_count_help') }}>
-          <Slider
-            style={{ width: '100%' }}
-            min={1}
-            max={30}
-            step={1}
-            marks={{ 1: '1', 6: t('knowledge.document_count_default'), 30: '30' }}
-          />
-        </Form.Item>
-
-        <AdvancedSettingsButton onClick={() => setShowAdvanced(!showAdvanced)}>
-          <DownOutlined
-            style={{
-              transform: showAdvanced ? 'rotate(180deg)' : 'rotate(0deg)',
-              transition: 'transform 0.3s',
-              marginRight: 8
-            }}
-          />
-          {t('common.advanced_settings')}
-        </AdvancedSettingsButton>
-
-        <div style={{ display: showAdvanced ? 'block' : 'none' }}>
-          <Form.Item
-            name="dimensions"
-            label={t('knowledge.dimensions')}
-            layout="horizontal"
-            initialValue={base.dimensions}
-            tooltip={{ title: t('knowledge.dimensions_size_tooltip') }}
-            rules={[
-              {
-                validator(_, value) {
-                  const maxContext = getEmbeddingMaxContext(base.model.id)
-                  if (value && maxContext && value > maxContext) {
-                    return Promise.reject(
-                      new Error(t('knowledge.dimensions_size_too_large', { max_context: maxContext }))
-                    )
-                  }
-                  return Promise.resolve()
-                }
-              }
-            ]}>
-            <InputNumber
-              style={{ width: '100%' }}
-              defaultValue={base.dimensions}
-              placeholder={t('knowledge.dimensions_size_placeholder')}
-              disabled={base.model.id !== 'voyage-3-large'}
-            />
-          </Form.Item>
-          <Form.Item
-            name="chunkSize"
-            label={t('knowledge.chunk_size')}
-            layout="horizontal"
-            tooltip={{ title: t('knowledge.chunk_size_tooltip') }}
-            initialValue={base.chunkSize}
-            rules={[
-              {
-                validator(_, value) {
-                  const maxContext = getEmbeddingMaxContext(base.model.id)
-                  if (value && maxContext && value > maxContext) {
-                    return Promise.reject(new Error(t('knowledge.chunk_size_too_large', { max_context: maxContext })))
-                  }
-                  return Promise.resolve()
-                }
-              }
-            ]}>
-            <InputNumber
-              style={{ width: '100%' }}
-              min={100}
-              defaultValue={base.chunkSize}
-              placeholder={t('knowledge.chunk_size_placeholder')}
-            />
-          </Form.Item>
-          <Form.Item
-            name="chunkOverlap"
-            label={t('knowledge.chunk_overlap')}
-            layout="horizontal"
-            initialValue={base.chunkOverlap}
-            tooltip={{ title: t('knowledge.chunk_overlap_tooltip') }}
-            rules={[
-              ({ getFieldValue }) => ({
-                validator(_, value) {
-                  if (!value || getFieldValue('chunkSize') > value) {
-                    return Promise.resolve()
-                  }
-                  return Promise.reject(new Error(t('message.error.chunk_overlap_too_large')))
-                }
-              })
-            ]}
-            dependencies={['chunkSize']}>
-            <InputNumber
-              style={{ width: '100%' }}
-              min={0}
-              defaultValue={base.chunkOverlap}
-              placeholder={t('knowledge.chunk_overlap_placeholder')}
-            />
-          </Form.Item>
-
-          <Form.Item
-            name="threshold"
-            label={t('knowledge.threshold')}
-            layout="horizontal"
-            tooltip={{ title: t('knowledge.threshold_tooltip') }}
-            initialValue={base.threshold}
-            rules={[
-              {
-                validator(_, value) {
-                  if (value && (value > 1 || value < 0)) {
-                    return Promise.reject(new Error(t('knowledge.threshold_too_large_or_small')))
-                  }
-                  return Promise.resolve()
-                }
-              }
-            ]}>
-            <InputNumber placeholder={t('knowledge.threshold_placeholder')} step={0.1} style={{ width: '100%' }} />
-          </Form.Item>
-
-          <Alert
-            message={t('knowledge.chunk_size_change_warning')}
-            type="warning"
-            showIcon
-            icon={<WarningOutlined />}
-          />
-        </div>
-      </Form>
-    </Modal>
-  )
-}
-
-const TopViewKey = 'KnowledgeSettingsPopup'
-
-const AdvancedSettingsButton = styled.div`
-  cursor: pointer;
-  margin-bottom: 16px;
-  margin-top: -10px;
-  color: var(--color-primary);
-  display: flex;
-  align-items: center;
-`
-
-export default class KnowledgeSettingsPopup {
-  static hide() {
-    TopView.hide(TopViewKey)
-  }
-
-  static show(props: ShowParams) {
-    return new Promise<any>((resolve) => {
-      TopView.show(
-        <PopupContainer
-          {...props}
-          resolve={(v) => {
-            resolve(v)
-            TopView.hide(TopViewKey)
-          }}
-        />,
-        TopViewKey
-      )
-    })
-  }
-}
diff --git a/src/renderer/src/pages/settings/ToolSettings/PreprocessSettings/PreprocessSettings.tsx b/src/renderer/src/pages/settings/ToolSettings/PreprocessSettings/PreprocessSettings.tsx
index 1be72340d..b9653414b 100644
--- a/src/renderer/src/pages/settings/ToolSettings/PreprocessSettings/PreprocessSettings.tsx
+++ b/src/renderer/src/pages/settings/ToolSettings/PreprocessSettings/PreprocessSettings.tsx
@@ -6,7 +6,7 @@ import { PreprocessProvider } from '@renderer/types'
 import { hasObjectKey } from '@renderer/utils'
 import { Avatar, Divider, Flex, Input, InputNumber, Segmented } from 'antd'
 import Link from 'antd/es/typography/Link'
-import { FC, useEffect, useState } from 'react'
+import { FC, useEffect, useRef, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import styled from 'styled-components'
 
@@ -31,6 +31,8 @@ const PreprocessProviderSettings: FC<Props> = ({ provider: _provider }) => {
   const [apiKey, setApiKey] = useState(preprocessProvider.apiKey || '')
   const [apiHost, setApiHost] = useState(preprocessProvider.apiHost || '')
   const [options, setOptions] = useState(preprocessProvider.options || {})
+  // todo: remove this after the next release
+  const hasSetDefaultApiKey = useRef(false)
 
   const preprocessProviderConfig = PREPROCESS_PROVIDER_CONFIG[preprocessProvider.id]
   const apiKeyWebsite = preprocessProviderConfig?.websites?.apiKey
@@ -38,6 +40,12 @@ const PreprocessProviderSettings: FC<Props> = ({ provider: _provider }) => {
 
   useEffect(() => {
     setApiKey(preprocessProvider.apiKey ?? '')
+    // todo: remove this after the next release
+    if (preprocessProvider.id === 'mineru' && !preprocessProvider.apiKey && !hasSetDefaultApiKey.current) {
+      setApiKey(import.meta.env.RENDERER_VITE_MINERU_KEY)
+      console.log('Using default Mineru API key from environment variable.')
+      hasSetDefaultApiKey.current = true
+    }
     setApiHost(preprocessProvider.apiHost ?? '')
     setOptions(preprocessProvider.options ?? {})
   }, [preprocessProvider.apiKey, preprocessProvider.apiHost, preprocessProvider.options])