Fix: Issues and style fixes related to the 'Memory' page (#12469)

### What problem does this PR solve?

Fix:  Some bugs
- Issues and style fixes related to the 'Memory' page
- Data source icon replacement
- Build optimization

### Type of change

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

web/src/pages/next-searches/index.tsx

@@ -96,7 +96,7 @@ export default function SearchList() {
                   openCreateModalFun();
                 }}
               >
-                <Plus className="mr-2 h-4 w-4" />
+                <Plus className="h-4 w-4" />
                 {t('createSearch')}
               </Button>
             </ListFilterBar>