Fix: Bug fixes #9869 (#10600)

### What problem does this PR solve?

Fix: Bug fixes #9869
- Added the disabled attribute to control the modal confirmation button
state
- Conditionally rendered the catalog enhancement toggle component
- Replaced the selector component and removed unused imports
- Removed redundant catalog enhancement text in the Chinese language
pack

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/locales/zh.ts

@@ -258,7 +258,6 @@ export default {
       theDocumentBeingParsedCannotBeDeleted: '正在解析的文档不能被删除',
     },
     knowledgeConfiguration: {
-      tocExtraction: '目录增强',
       tocExtractionTip:
         '对于已有的chunk生成层级结构的目录信息（每个文件一个目录）。在查询时，激活`目录增强`后，系统会用大模型去判断用户问题和哪些目录项相关，从而找到相关的chunk。',
       deleteGenerateModalContent: `