Opencode's 'web' command makes your local session run on the browser with same access rights as the cli. It's a pretty slick interface too. I sometimes use it instead of the cli even when I can access both.
You can test it right now if you want with the included free models.
It's changing super fast. I am using it on the desktop mostly and when I tried on my phone there were issues yes. But do try it out again in a few weeks.
(I am actually using zellij on the remote and using various CLIs more than I am using only opencode on the web. I was using wezterm mux until about a week ago but the current state of the terminal is not very good for this scenario. It seems like almost all the CLIs are choking because of nodejs ink library)
You can test it right now if you want with the included free models.
https://opencode.ai/docs/web/