Add confirmations to warn about destructive consequences

app/helpers/workflows_helper.rb

@@ -22,4 +22,14 @@ module WorkflowsHelper
       "It's not being used in any collections."
     end
   end
+
+  def workflow_switch_confirmation_message(workflow, collection)
+    if workflow == collection.workflow
+      "Stop using #{workflow.name}? Cards you're working on will lose their current stage."
+    elsif collection.workflow.present?
+      "Switch to #{workflow.name}? This will return all cards you're working on to the first stage."
+    else
+      nil
+    end
+  end
 end

app/views/collections/edit/_workflows.html.erb

@@ -7,7 +7,10 @@
   <div class="flex flex-wrap gap justify-center">
     <% Workflow.all.each do |workflow| %>
       <div class="workflow-preview txt-align-start border-radius <%= 'workflow-preview--selected' if workflow == collection.workflow %>">
-        <%= button_to collection_workflow_path(collection), method: :patch, aria: { label: workflow == collection.workflow ? "Stop using this workflow" : "Use this workflow" } do %>
+        <% confirmation_message = workflow_switch_confirmation_message(workflow, collection) %>
+        <%= button_to collection_workflow_path(collection), method: :patch, 
+              aria: { label: workflow == collection.workflow ? "Stop using this workflow" : "Use this workflow" },
+              data: confirmation_message ? { turbo_confirm: confirmation_message } : {} do %>
           <%= hidden_field_tag "collection[workflow_id]", workflow == collection.workflow ? "" : workflow.id %>
           <strong class="txt-small overflow-ellipsis flex-item-no-shrink"><%= workflow.name %></strong>
           <ul class="list-style-none txt-xx-small margin-none flex flex-column gap-half">
@@ -22,5 +25,6 @@
       </div>
     <% end %>
   </div>
+
   <%= link_to "Manage workflows", workflows_path, class: "btn btn--plain txt-link", data: { turbo_frame: "_top" } %>
 <% end %>