fix set template with/without cards mismatch

app/controllers/merged/sections_controller.rb

@@ -41,6 +41,15 @@ module Merged
     def set_template
       template = params[:template]
       raise "no template given" if template.blank?
+      style = SectionStyle.where(template: template).first
+      raise "no such template #{template}" unless style
+      if(! style.has_cards?)
+        if( @section.cards.length > 0 )
+          redirect_to section_url(@section.id) , alert: "Must delete cards first"
+          return
+        end
+        @section.card_style = ""
+      end
       @section.set_template( template )
       @section.edit_save(current_member.email)
       redirect_to section_url(@section.id)

app/views/merged/cards/index.haml

@@ -1,8 +1,8 @@
 .mx-20.flex.h-16.items-center.gap-16
   = render "merged/sections/sections_pagination" , section: @section
-  .text-xl.text-gray-900
-    Cards for Section #{@section.index} -
-    = link_to @section.header , merged.section_path( @section.id) , class: "underline"
+  .text-3xl.font-bold.text-gray-900
+    = @section.cards.length
+    Cards
   = link_to( "New Card" , merged.new_section_card_path(@section.id) , class: "p-2 border border-gray-200 bg-cyan-100 font-bold rounded-lg hover:bg-sky-100")
 
 = render_section( @section )

app/views/merged/sections/_sections_pagination.haml

@@ -7,7 +7,7 @@
     Section
     \:
     = link_to section.header, section_path(section), class: "underline text-3xl ml-3"
-.link
+
 .inline-flex.items-center.justify-center.gap-3
   - if section.previous_section
     =link_to merged.section_path(section.previous_section.id) , class: "inline-flex h-8 w-8 items-center justify-center rounded border border-gray-100 hover:bg-sky-100" do