### What problem does this PR solve?
Fix: Optimized the style and functionality of multiple components #3221
- Modified the SkeletonCard component, adding a className attribute and
adjusting the style
- Updated the RAGFlowSelect component, adding a disabled attribute
- Adjusted the style of the Tooltip component
- Optimized the layout of the RetrievalTesting and TestingResult pages
- Updated the style and loading status display of NextSearch-related
pages
- Removed unnecessary logs from the Spotlight component
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
