Refa: refactor metadata filter (#11907)

### What problem does this PR solve?

Refactor metadata filter.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
- [x] Refactoring

---------

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

web/src/hooks/use-knowledge-request.ts

@@ -75,6 +75,7 @@ export const useTestRetrieval = () => {
       page,
       size: pageSize,
       doc_ids: filterValue.doc_ids,
+      highlight: true,
     };
   }, [filterValue, knowledgeBaseId, page, pageSize, values]);