Adding a token by its contract address is checked against the address
screen's balance list. TransactionDetail opened from the token screen is
checked on the persisted navigation stack, on arrival and after Back,
which is what tells it apart from the address screen's entry point. The
token contract row's explorer link is read off the anchor, not followed,
so it needs no network fixture.
The network stub now answers symbol() and name() for the stub token,
which Add Token reads; before, both decoded as empty strings. The token
stays tracked for the rest of the run.
Model: opus-5-5
sneak