chore(frontend): change scrollbar invisible (#177)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Added new configuration files: `container-state.json` and
`port-state.json`.
  
- **Style**
- Refined scrollbar styling to achieve a cleaner, minimalist look across
browsers. The updated design simplifies the appearance by making
scrollbar elements transparent and ensuring consistency on both
WebKit-based browsers and Firefox. Additionally, the scrollbar is now
hidden from view.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Co-authored-by: Sma1lboy <541898146chen@gmail.com>

Author: 2 people

frontend/src/app/globals.css

@@ -94,6 +94,7 @@
 }
 
 ::-webkit-scrollbar {
+  display: none;
   width: 6px;
   height: 6px;
 }