### What problem does this PR solve?
- Update search_app.py to use SearchService instead of
KnowledgebaseService for duplicate
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Add MCP server dashboard operations.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
Yongteng Lei
Liu An