### 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: Restore the button's background color #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Add InnerBlurInput component to avoid frequent updates of zustand
causing the input box to lose focus #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Add ChatInput component #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Add DatasetCreatingDialog #3221
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
