feat: UI

frontend/src/pages/Panel.tsx

@@ -27,6 +27,7 @@ import {
 
 import Download from './Download'
 import { Separator } from '@/components/ui/separator'
+import { Loader2 } from 'lucide-react'
 
 const Panel: React.FC = () => {
   const [macInputDisabled, setMacInputDisabled] = useState(false)
@@ -67,7 +68,7 @@ const Panel: React.FC = () => {
         GetLatestVersion().then(res => {
           if (res === null) {
             toast('Get database failed.', {
-              description: '⛓️‍💥 Please check your internet connection.'  
+              description: '⛓️‍💥 Please check your internet connection.',
             })
           } else {
             setNewVersion(res)
@@ -186,6 +187,7 @@ const Panel: React.FC = () => {
           onClick={handleCheck}
           disabled={checkDisabled}
         >
+          {checkDisabled ?? <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
           Check
         </Button>
       </div>