Just open one turbo stream per card

Per comment is excessive and needless

app/controllers/cards/comments/reactions_controller.rb

@@ -34,11 +34,11 @@ class Cards::Comments::ReactionsController < ApplicationController
     end
 
     def broadcast_create(reaction)
-      reaction.broadcast_append_to @comment, :reactions,
+      reaction.broadcast_append_to @card,
         target: "reactions_comment_#{@comment.id}", partial: "cards/comments/reactions/reaction", locals: { comment: @comment }
     end
 
     def broadcast_remove(reaction)
-      reaction.broadcast_remove_to @comment, :reactions
+      reaction.broadcast_remove_to @card
     end
 end

app/views/cards/comments/reactions/_reactions.html.erb

@@ -1,6 +1,4 @@
 <%= turbo_frame_tag comment, :reacting do %>
-  <%= turbo_stream_from comment, :reactions %>
-
   <div class="reactions flex flex-wrap align-center gap full-width">
     <div class="flex-inline flex-wrap gap" id="<%= dom_id(comment, :reactions) %>" data-turbo-streaming-target="container">
       <%= render partial: "cards/comments/reactions/reaction", collection: comment.reactions.ordered, locals: { comment: comment }, cached: true %>

app/views/cards/show.html.erb

@@ -1,4 +1,5 @@
 <% @page_title = card_title(@card) %>
+<%= turbo_stream_from @card %>
 
 <% content_for :header do %>
   <% if @card.creating? && @card.can_recover_abandoned_creation? %>

test/controllers/cards/comments/reactions_controller_test.rb

@@ -4,10 +4,11 @@ class Cards::Comments::ReactionsControllerTest < ActionDispatch::IntegrationTest
   setup do
     sign_in_as :jz
     @comment = comments(:logo_agreement_jz)
+    @card = @comment.card
   end
 
   test "create" do
-    assert_turbo_stream_broadcasts [ @comment, :reactions ], count: 1 do
+    assert_turbo_stream_broadcasts @card, count: 1 do
       assert_difference -> { @comment.reactions.count }, 1 do
         post card_comment_reactions_url(@comment.card, @comment, format: :turbo_stream), params: { reaction: { content: "Great work!" } }
         assert_redirected_to card_comment_reactions_url(@comment.card, @comment)
@@ -16,7 +17,7 @@ class Cards::Comments::ReactionsControllerTest < ActionDispatch::IntegrationTest
   end
 
   test "destroy" do
-    assert_turbo_stream_broadcasts [ @comment, :reactions ], count: 1 do
+    assert_turbo_stream_broadcasts @card, count: 1 do
       assert_difference -> { @comment.reactions.count }, -1 do
         delete card_comment_reaction_url(@comment.card, @comment, reactions(:kevin), format: :turbo_stream)
         assert_response :success