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-chats/index.tsx

@@ -72,7 +72,7 @@ export default function ChatList() {
               searchString={searchString}
             >
               <Button onClick={handleShowCreateModal}>
-                <Plus className="size-2.5" />
+                <Plus className="h-4 w-4" />
                 {t('chat.createChat')}
               </Button>
             </ListFilterBar>