fix sign out and empty member

app/helpers/application_helper.rb

@@ -11,6 +11,7 @@ module ApplicationHelper
   end
 
   def markdown(text)
+    return "" if text.blank?
     text = text.text unless text.is_a?(String)
     return "" if text.blank?
     self.renderer.render(text).html_safe

app/views/layouts/_member_menu.haml

@@ -7,7 +7,7 @@
     - if current_member.admin?
       %a.block.rounded-lg.px-4.py-2.text-sm.text-gray-500.hover:bg-gray-50.hover:text-gray-700{:href => merged.pages_path(), :role => "menuitem"}
         CMS
-    %form{:action => "#", :method => "POST"}
+  = form_tag( main_app.destroy_member_session_path , {method: :delete  } ) do
     %button.flex.w-full.items-center.gap-2.rounded-lg.px-4.py-2.text-sm.text-blue-700.hover:bg-red-50{:role => "menuitem", :type => "submit"}
       %svg.h-4.w-4{:fill => "none", :stroke => "currentColor", "stroke-width" => "2", :viewbox => "0 0 24 24", :xmlns => "http://www.w3.org/2000/svg"}
         %path{:d => "M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16", "stroke-linecap" => "round", "stroke-linejoin" => "round"}

app/views/members/show.html.haml

@@ -1,6 +1,7 @@
 .px-4.py-16.mx-auto.sm:max-w-xl.md:max-w-full.lg:max-w-screen-xl.md:px-24.lg:px-8.lg:py-20
   .flex.flex-col.max-w-screen-lg.overflow-hidden.bg-white.border.rounded.shadow-sm.lg:flex-row.sm:mx-auto
     .relative{:class => "lg:w-1/2"}
+      -if @member.picture_url
         = image_tag @member.picture_url, class: "object-cover w-full lg:absolute h-80 lg:h-full"
     .flex.flex-col.justify-center.p-8.lg:p-16.lg:pl-10{:class => "lg:w-1/2"}
       %div