feat: add attribution footer when UI is personalized (v1.3.0) (#12)

- Add Docuseal.personalized?(account) helper that returns true when
  a custom logo is attached OR a brand name is configured
- Show 'Powered by DocuSeal' footer in the app layout when personalized
- Show 'Powered by DocuSeal' line in email attribution when personalized
- No footer shown in default (non-personalized) state

Co-authored-by: Bob Develop <developbob50@gmail.com>

app/views/layouts/application.html.erb

@@ -32,6 +32,11 @@
     <div class="max-w-6xl mx-auto px-4 md:px-2 mb-8">
       <%= yield %>
     </div>
+    <% if defined?(current_account) && Docuseal.personalized?(current_account) %>
+      <footer class="text-center text-xs text-base-content/50 pb-4">
+        <%= t('powered_by') %> <a href="<%= Docuseal::PRODUCT_URL %>" class="underline"><%= Docuseal.product_name %></a>
+      </footer>
+    <% end %>
     <%= render 'shared/body_scripts' %>
   </body>
 </html>

app/views/shared/_email_attribution.html.erb

@@ -1,3 +1,4 @@
+<% email_attr_account = @current_account || @submitter&.account || @submission&.account %>
 <p>
   ---
 </p>
@@ -8,3 +9,8 @@
     <%= t('sent_using_product_name_free_document_signing_html', product_url: "#{Docuseal::PRODUCT_EMAIL_URL}/start", product_name: Docuseal.product_name) %>
   <% end %>
 </p>
+<% if Docuseal.personalized?(email_attr_account) %>
+  <p style="font-size: 11px; color: #9ca3af;">
+    <%= t('powered_by') %> <a href="<%= Docuseal::PRODUCT_URL %>" style="color: #9ca3af;"><%= Docuseal.product_name %></a>
+  </p>
+<% end %>

lib/docuseal.rb

@@ -120,6 +120,14 @@ module Docuseal
     ENV.fetch('CUSTOM_LOGO_URL', nil)
   end
 
+  def personalized?(account)
+    return false unless account
+
+    account.logo.attached? ||
+      custom_logo_url.present? ||
+      account.config_value(AccountConfig::BRAND_NAME_KEY).first.present?
+  end
+
   def product_name
     PRODUCT_NAME
   end