Move bubble stagings out from double nesting

app/helpers/workflows_helper.rb

@@ -1,6 +1,6 @@
 module WorkflowsHelper
   def button_to_set_stage(bubble, stage)
-    button_to bucket_bubble_stagings_path(bubble.bucket, bubble, stage_id: stage),
+    button_to bubble_stagings_path(bubble, stage_id: stage),
         method: :post, class: [ "btn full-width justify-start workflow-stage txt-uppercase", { "workflow-stage--current": stage == bubble.stage } ],
         form_class: "flex align-center gap-half",
         data: { turbo_frame: "_top" } do

config/routes.rb

@@ -20,6 +20,7 @@ Rails.application.routes.draw do
 
       resources :assignments
       resources :boosts
+      resources :stagings
       resources :taggings
     end
   end
@@ -52,7 +53,6 @@ Rails.application.routes.draw do
       resource :readings, only: :create
 
       scope module: :bubbles do
-        resources :stagings
       end
     end
   end

test/integration/bubble_messages.rb

@@ -34,14 +34,14 @@ class BubbleMessagesTest < ActionDispatch::IntegrationTest
     assert_equal "assigned", bubble.messages.last.messageable.events.last.action
 
     # Stage it
-    post bucket_bubble_stagings_url(buckets(:writebook), bubble), params: { stage_id: workflow_stages(:qa_triage).id }
+    post bubble_stagings_url(bubble), params: { stage_id: workflow_stages(:qa_triage).id }
     assert_equal 3, bubble.messages.count
     assert_predicate bubble.messages.last, :event_summary?
     assert_equal 2, bubble.messages.last.event_summary.events.count
     assert_equal "staged", bubble.messages.last.messageable.events.last.action
 
     # Unstage it
-    post bucket_bubble_stagings_url(buckets(:writebook), bubble), params: { stage_id: workflow_stages(:qa_triage).id }
+    post bubble_stagings_url(bubble), params: { stage_id: workflow_stages(:qa_triage).id }
     assert_equal 3, bubble.messages.count
     assert_predicate bubble.messages.last, :event_summary?
     assert_equal 3, bubble.messages.last.event_summary.events.count