Install as main frontend for mastodon instance

[reesericci]

Is your feature request related to a problem? Please describe.
The official mastodon UI is not as pretty as Phanpy, and I would like to be able to have it available as the primary frontend for my instance's users (and myself).

Describe the solution you'd like
An ability to use Phanpy as the primary frontend for a Mastodon instance, and a button for accessing instance/user settings.

Describe alternatives you've considered
Putting up with the official UI

Additional context