### What problem does this PR solve?
Fixes (web): Optimized search page style and functionality #3221
- Updated search page and view title styles
- Modified dataset list and multi-select control styles
- Optimized text field and button styles
- Updated filter button icons
- Adjusted metadata filter styles
- Added default descriptions for the smart assistant
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Fix (search): Search application list supports renaming function #3221
-Update the search application list page and add a renaming operation
entry
-Modify the search application details interface to support obtaining
detailed information
-Optimize search settings page layout and style
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
feat(next-search): Implements document preview functionality
- Adds a new document preview modal component
- Implements document preview page logic
- Adds document preview-related hooks
- Optimizes document preview rendering logic
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat(next-search): Added AI summary functionality #3221
- Added the LlmSettingFieldItems component for AI summary settings
- Updated the SearchSetting component to integrate AI summary
functionality
- Added the updateSearch hook and related service methods
- Modified the ISearchAppDetailProps interface to add the llm_setting
field
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
