### What problem does this PR solve?
feat: Added UI functions related to data-flow knowledge base #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Fix: Optimize search functionality
- Fixed search limitations when no dataset is selected
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### 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?
feat(search): Optimized search functionality and user interface #3221
### Type of change
- Added similarity threshold adjustment function
- Optimized mind map display logic
- Adjusted search settings interface layout
- Fixed related search and document viewing functions
- Optimized time display and node selection logic
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Fix (search): Optimize the search page functionality and UI #3221
- Add a search list component
- Implement search settings
- Optimize search result display
- Add related search functionality
- Adjust the search input box style
- Unify internationalized text
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
feat(search): Added app embedding functionality and optimized search
page #3221
- Added an Embed App button and related functionality
- Optimized the layout and interaction of the search settings interface
- Adjusted the search result display method
- Refactored some code to support new features
### 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: New search page components and features #3221
- Added search homepage, search settings, and ongoing search components
- Implemented features such as search app list, creating search apps,
and deleting search apps
- Optimized the multi-select component, adding disabled state and suffix
display
- Adjusted navigation hooks to support search page navigation
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
