Fix: Implement DOMPurify to sanitize HTML content before rendering (#1498)

### What problem does this PR solve?

This PR resolves issue #1491 related to HTML Injection and Cross-Site
Scripting (XSS). The issue was caused by the unsafe usage of
`dangerouslySetInnerHTML` without proper sanitization of user input.

### Changes
- Added DOMPurify dependency.
- Updated the following components to use DOMPurify:
-
`web/src/pages/add-knowledge/components/knowledge-chunk/components/chunk-card/index.tsx`
  - `web/src/pages/chat/markdown-content/index.tsx`
-
`web/src/pages/add-knowledge/components/knowledge-setting/category-panel.tsx`

### Type of change

- [x] Other (please describe): Security Fix

web/src/pages/add-knowledge/components/knowledge-setting/category-panel.tsx

@@ -2,6 +2,7 @@ import SvgIcon from '@/components/svg-icon';
 import { useTranslate } from '@/hooks/commonHooks';
 import { useSelectParserList } from '@/hooks/userSettingHook';
 import { Col, Divider, Empty, Row, Typography } from 'antd';
+import DOMPurify from 'dompurify';
 import { useMemo } from 'react';
 import styles from './index.less';
 import { ImageMap } from './utils';
@@ -39,7 +40,7 @@ const CategoryPanel = ({ chunkMethod }: { chunkMethod: string }) => {
           </Title>
           <p
             dangerouslySetInnerHTML={{
-              __html: item.description,
+              __html: DOMPurify.sanitize(item.description),
             }}
           ></p>
           <Title level={5}>