feat: redirect logged user to home

[wa0x6e]

Summary

This PR restore feature from #640

How to test

1. Go to / as a guest user
2. You should see the home page
3. Go to / as a logged in user
4. You should be redirect to /home

[bonustrack]

The flashing landing page is a bit annoying, would be great to find a workaround

[wa0x6e]

Ideal solution would be to have a splash screen, which would show for the first 1 second, or when the app is ready (logged in, or when sure it's a guest), whichever come first.

From claude:

YouTube TV: When launching the web app, it shows a brief splash screen with the YouTube TV logo.

Slack: The desktop and web applications show a splash screen while loading.

Discord: The desktop and web apps display a splash screen during startup.

Some Google Web Applications: Certain Google apps like Google Docs or Google Sheets may show a brief splash screen when opening a document.

Trello: The web app shows a loading splash screen when initializing.

Notion: The web application displays a splash screen while loading.

He also recommended a few alternatives, the most I like is showing a skeleton screen

[bonustrack]

We can go with the splash screen but we will need to solve this first: #478