Add browser navigation for feed → cast / conversation navigation

[hellno]

please allow the use of the browser's back button. Once going feed > cast, clicking the browser's back button or swiping (very common use), instead of using the 'back' on the app's interface, will lead the user to the previous page on the browser's history.

(mobile below)

https://warpcast.com/rodrigobardin/0x05390151