refactor(login): remove LoadingOverlay from LoginPage and return null

app/login/page.tsx

@@ -2,7 +2,6 @@
 
 import { useEffect } from 'react'
 import { initiateOAuthFlow } from '@/lib/api/oauth'
-import LoadingOverlay from '@/components/LoadingOverlay'
 
 export default function LoginPage() {
   useEffect(() => {
@@ -10,10 +9,5 @@ export default function LoginPage() {
     initiateOAuthFlow()
   }, [])
 
-  return (
-    <LoadingOverlay 
-      logoSrc="/ciphera_icon_no_margins.png"
-      title="Redirecting to sign in..."
-    />
-  )
+  return null
 }