Fix idempotency issue during partner info upload (#5304)

Author: juliannatetreault

app/views/partners/_form.html.erb

@@ -53,6 +53,7 @@
                       <% if doc.persisted? %>
                         <li class="attached-document d-flex justify-content-between align-items-center p-2 border rounded mb-2" data-document-id="<%= doc.signed_id %>">
                           <%= link_to doc.blob.filename.to_s, rails_blob_path(doc), class: "font-weight-bold w-75 text-truncate" %>
+                          <%= f.hidden_field :documents, multiple: true, value: doc.signed_id %>
                           <%= delete_button_to attachment_path(doc), { text: "Remove", size: "md", confirm: "Are you sure you want to permanently remove this document?" } %>
                         </li>
                       <% end %>

spec/system/partner_system_spec.rb

@@ -403,6 +403,34 @@
         expect(page).to have_link("distribution_program_address.pdf")
         expect(page).to have_link("distribution_same_address.pdf")
       end
+
+      it "allows documents to be uploaded and persists documents across multiple refreshes", :aggregate_failures do
+        document_1 = Rails.root.join("spec/fixtures/files/distribution_program_address.pdf")
+        document_2 = Rails.root.join("spec/fixtures/files/distribution_same_address.pdf")
+        documents = [document_1, document_2]
+
+        # Upload the documents
+        visit subject
+        attach_file(documents, make_visible: true) do
+          page.find('input#partner_documents').click
+        end
+
+        # Test document persistence across multiple refresh cycles
+        3.times do |iteration|
+          # Save progress
+          click_button "Update Partner"
+
+          # Verify documents on show page
+          expect(page).to have_current_path(partner_path(partner.id))
+          expect(page).to have_link("distribution_program_address.pdf")
+          expect(page).to have_link("distribution_same_address.pdf")
+
+          # Visit edit page and verify documents persist
+          visit subject
+          expect(page).to have_link("distribution_program_address.pdf")
+          expect(page).to have_link("distribution_same_address.pdf")
+        end
+      end
     end
 
     describe "#edit_profile" do