guest:operator's authenticated-user redirect had no console-aware
override, so it fell to Laravel's own default: the named 'dashboard'
route, the portal. An operator revisiting admin.login while already
signed in bounced to the portal's own login instead — in exclusive
mode, to a 404, since dashboard isn't a console route there.
redirectUsersTo() now mirrors the existing redirectGuestsTo() override
right above it, keyed on the same AdminArea::isConsole($request)
condition, so the two read as a pair.
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