feat: add 'Correct signature' button to reset a signer and re-request signature

Adds an admin-only 'Correct signature' button on completed submitters in the
submission view. It clears the submitter's existing signature (documents,
attachments and field values), reopens their form, and re-sends the invitation
email so they can sign again — useful when a signature was made incorrectly.

- New SubmittersResetSignatureController#update (authorized via :update)
- New route: resources :submitters_reset_signature, only: [:update]
- Button in submissions/show.html.erb for completed submitters (with confirm)
- EN/ES i18n strings

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/controllers/submitters_reset_signature_controller.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+class SubmittersResetSignatureController < ApplicationController
+  load_and_authorize_resource :submitter, parent: false
+
+  def update
+    authorize!(:update, @submitter)
+
+    if @submitter.completed_at.blank?
+      return redirect_back(fallback_location: submission_path(@submitter.submission),
+                           alert: I18n.t('signature_has_not_been_completed_yet'))
+    end
+
+    # Remove the previously generated signature artifacts.
+    @submitter.documents.purge
+    @submitter.attachments.purge
+    @submitter.preview_documents.purge
+
+    # Re-open the submitter's form so they can sign again from scratch.
+    @submitter.update!(completed_at: nil, opened_at: nil, declined_at: nil, values: {})
+
+    # Email the signer a fresh invitation to correct their signature.
+    SendSubmitterInvitationEmailJob.perform_async('submitter_id' => @submitter.id)
+
+    @submitter.update!(sent_at: Time.current)
+
+    redirect_back(fallback_location: submission_path(@submitter.submission),
+                  notice: I18n.t('correction_request_has_been_sent'))
+  end
+end

app/views/submissions/show.html.erb

@@ -283,6 +283,11 @@
                 <%= button_to t('resubmit'), submitters_resubmit_path(submitter), method: :put, class: 'btn btn-sm btn-primary w-full', form: { target: '_blank' }, data: { turbo: false } %>
               </div>
             <% end %>
+            <% if signed_in? && submitter && submitter.completed_at? && !@submission.archived_at? && !@submission.template&.archived_at? && can?(:update, @submission) && (Docuseal.multitenant? || Accounts.can_send_emails?(current_account)) && !@submission.expired? %>
+              <div class="mt-2 mb-1">
+                <%= button_to t('correct_signature'), submitters_reset_signature_path(submitter), method: :put, class: 'btn btn-sm btn-outline w-full', data: { turbo_confirm: t('are_you_sure_you_want_to_reset_this_signature') } %>
+              </div>
+            <% end %>
           </div>
         </div>
         <div class="px-1.5 mb-4">

config/locales/i18n.yml

@@ -195,6 +195,10 @@ en: &en
   send_copy_to_email: Send copy to Email
   sending: Sending
   resubmit: Resubmit
+  correct_signature: Correct Signature
+  correction_request_has_been_sent: A request to correct the signature has been emailed to the signer.
+  signature_has_not_been_completed_yet: This signature has not been completed yet.
+  are_you_sure_you_want_to_reset_this_signature: This will delete the signer's current signature and email them to sign again. Continue?
   form_has_been_deleted_by_html: 'Form has been deleted by <span class="font-semibold">%{name}</span>.'
   or: or
   download_documents: Download documents
@@ -1512,6 +1516,10 @@ es: &es
   microsoft_account_has_been_connected: La cuenta de Microsoft ha sido conectada.
   but_not_activated: pero no activado
   email_has_been_sent: El correo ha sido enviado.
+  correct_signature: Corregir firma
+  correction_request_has_been_sent: Se envió al firmante un correo para corregir su firma.
+  signature_has_not_been_completed_yet: Esta firma aún no ha sido completada.
+  are_you_sure_you_want_to_reset_this_signature: Esto eliminará la firma actual del firmante y le enviará un correo para firmar de nuevo. ¿Continuar?
   email_has_been_sent_already: El correo ya ha sido enviado.
   initial_setup: Configuración inicial
   demo_environment: Entorno de demostración

config/routes.rb

@@ -82,6 +82,7 @@ Rails.application.routes.draw do
   resources :testing_api_settings, only: %i[index]
   resources :submitters_autocomplete, only: %i[index]
   resources :submitters_resubmit, only: %i[update]
+  resources :submitters_reset_signature, only: %i[update]
   resources :template_folders_autocomplete, only: %i[index]
   resources :webhook_secret, only: %i[show update]
   resources :webhook_hmac, only: %i[show]