Please run these commands in the browser console and tell me the results:

1. Check if you see the login screen:
   document.getElementById('login-screen').classList.contains('active')

2. Check localStorage state:
   localStorage.getItem('auth_token')
   localStorage.getItem('user')

3. Check what screen is showing:
   {
     loginActive: document.getElementById('login-screen').classList.contains('active'),
     appActive: document.getElementById('app-screen').classList.contains('active')
   }