Be consistent about using turbo stream templates

app/controllers/cards/assignments_controller.rb

@@ -8,6 +8,5 @@ class Cards::AssignmentsController < ApplicationController
 
   def create
     @card.toggle_assignment @collection.users.active.find(params[:assignee_id])
-    render turbo_stream: turbo_stream.replace([ @card, :meta ], partial: "/cards/display/perma/meta", method: "morph", locals: { card: @card.reload })
   end
 end

app/views/cards/assignments/create.turbo_stream.erb

@@ -0,0 +1 @@
+<%= turbo_stream.replace([ @card, :meta ], partial: "/cards/display/perma/meta", method: "morph", locals: { card: @card.reload }) %>