Auto redirect on login page

[daniel-illi]

closes #59739

[Kagemaru]

Reduction of the double negatives

Suggested change

	def local_auth?
	Settings.auth.db.active
	end
	def omniauth_providers
	Settings.auth&.omniauth&.map(&:second)&.map(&:active)
	end
	def single_omniauth_provider?
	omniauth_providers&.one?
	end
	def auto_login_disabled?
	ActiveRecord::Type::Boolean.new.deserialize(params[:prevent_auto_login]) || false
	end
	def auto_redirect?
	!auto_login_disabled? && !local_auth? && single_omniauth_provider?
	end
	def no_local_auth?
	!Settings.auth.db.active
	end
	def omniauth_providers_active
	Settings.auth&.omniauth&.map(&:second)&.map(&:active)
	end
	def single_omniauth_provider?
	omniauth_providers_active&.one?
	end
	def auto_login_enabled?
	return true unless prevent = params[:prevent_auto_login]
	!ActiveRecord::Type::Boolean.new.deserialize(prevent)
	end
	def auto_redirect?
	auto_login_enabled? && no_local_auth? && single_omniauth_provider?
	end