feat: add approval ui for join requests

test/support/fixtures.ex

@@ -323,10 +323,12 @@ defmodule Mv.Fixtures do
   """
   def submitted_join_request_fixture(attrs \\ %{}) do
     token = "fixture-token-#{System.unique_integer([:positive])}"
+
     base = %{
       email: "join#{System.unique_integer([:positive])}@example.com",
       confirmation_token: token
     }
+
     attrs = base |> Map.merge(attrs) |> Map.put(:confirmation_token, token)
 
     {:ok, _} = Membership.submit_join_request(attrs, actor: nil)