Broadcast bucket changes to index page

This will cause each filtered view to stay updated as the items in the
buckets change.

For filters that are specific to buckets, we listen to broadcasts on
those buckets; for filters on "All projects" we listen instead for
broadcasts on an account-specific channel. This is so that "All
projects" views will be aware of any new buckets that are added, while
also avoid unnecessary refreshes from buckets that are filtered out.

app/models/bucket.rb

@@ -1,5 +1,5 @@
 class Bucket < ApplicationRecord
-  include Accessible, Filterable
+  include Accessible, Broadcastable, Filterable
 
   belongs_to :account
   belongs_to :creator, class_name: "User", default: -> { Current.user }

app/models/bucket/broadcastable.rb

@@ -0,0 +1,8 @@
+module Bucket::Broadcastable
+  extend ActiveSupport::Concern
+
+  included do
+    broadcasts_refreshes
+    broadcasts_refreshes_to ->(bucket) { [ bucket.account, :buckets ] }
+  end
+end

app/views/bubbles/index.html.erb

@@ -1,5 +1,8 @@
 <% @page_title = @filter.plain_summary %>
 
+<% turbo_refreshes_with method: :morph, scroll: :preserve %>
+<%= render "filters/broadcasts", filter: @filter %>
+
 <% content_for :header do %>
   <nav class="align-start">
     <%= link_to root_path, class: "btn flex-item-justify-start" do %>

app/views/filters/_broadcasts.html.erb

@@ -0,0 +1,7 @@
+<% if filter.buckets.any? %>
+  <% filter.buckets.each do |bucket| %>
+    <%= turbo_stream_from bucket %>
+  <% end %>
+<% else %>
+  <%= turbo_stream_from Current.account, :buckets %>
+<% end %>