Why are you submitting this feature request
Accounts are not currently protected in the event of the password database becoming public, or if the individual account holder has their password compromised.

Describe the solution you'd like
Yubikey support.

Describe alternatives you've considered
Please don't use SMS.

Additional context
The account is worth protecting. It

If the user is using i2p-zero for I2P, chances are they don't have an I2CP port exposed, which we use to detect the presence of an I2P router before attempting to connect to SAM. That way if the router is present but SAM isn't enabled we can advise the user to enable it. So instead, we need to check for I2CP, then attempt to connect to SAM. That way we have 4 states. No I2CP or SAM, I2CP but not S

When the proxy isn't ready, but the user enters an I2P browsing tab, provide a descriptive error page to guide the user to a solution, even if that solution is to tell them to wait 2 minutes.

States should be described:

• Router Not Present: There is no indication that I2P is installed on the system. Direct them to an I2P distribution.
• HTTP Proxy Not Ready: The router is present, but th