[FR]: Offline warning snackbar is too naggy

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Describe the problem

We have a snackbar which is constantly on when the user is offline. This is probably a bit too naggy.

### Describe the solution

We should consider only showing the snackbar for a few seconds and/or allowing the user to dismiss the snackbar. This frees up screen real estate for the user to browse the offline content.

### Additional context

_No response_

### Code of Conduct

- [X] I agree to follow this project's Code of Conduct

Start by locating the offline snackbar in the Android app and review how its current persistent behavior is implemented. Confirm whether the intended result is a timed notification, a dismissible notification, or both; done means the snackbar no longer permanently occupies space while offline content remains browsable.

Written by the indexing model from the issue text.