Scope general broadcasts by account

Because DoS ourselves is not fun

app/models/board/broadcastable.rb

@@ -3,5 +3,6 @@ module Board::Broadcastable
 
   included do
     broadcasts_refreshes
+    broadcasts_refreshes_to ->(board) { [ board.account, :all_boards ] }
   end
 end

app/views/cards/_broadcasts.html.erb

@@ -3,5 +3,5 @@
     <%= turbo_stream_from board %>
   <% end %>
 <% else %>
-  <%= turbo_stream_from :all_boards %>
+  <%= turbo_stream_from [ Current.account, :all_boards ] %>
 <% end %>