Add alt text to all images in Rails ERB views

Fixed 8 images missing alt attributes across Rails views:

- submissions/show.html.erb (4 images):
  * Document preview thumbnails in sidebar
  * Document page images in main viewer
  * Signature/initials field images in parties view
  * Image/stamp/KBA attachment images in parties view

- profile/index.html.erb (2 images):
  * User's signature preview
  * User's initials preview

- submissions/_value.html.erb (2 images):
  * Signature field images with metadata
  * Image/initials/stamp/KBA field images

- submit_form/show.html.erb (1 image):
  * Document page images in submission form

All alt text uses dynamic field names and descriptive defaults with i18n support.
This satisfies WCAG 2.2 Success Criterion 1.1.1 (Non-text Content, Level A).

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

app/views/profile/index.html.erb

@@ -36,7 +36,7 @@
     <% if signature %>
       <div class="flex justify-center mb-4 relative">
         <%= button_to button_title(title: t('remove'), disabled_with: t('removing')), user_signature_path, method: :delete, class: 'right-0 top-0 absolute link' %>
-        <img src="<%= signature.url %>" style="max-height: 200px; width: auto" width="<%= signature.metadata['width'] %>" height="<%= signature.metadata['height'] %>">
+        <img src="<%= signature.url %>" alt="<%= t('your_signature') %>" style="max-height: 200px; width: auto" width="<%= signature.metadata['width'] %>" height="<%= signature.metadata['height'] %>">
       </div>
     <% end %>
     <a href="<%= edit_user_signature_path %>" data-turbo-frame="modal" class="base-button w-full">
@@ -49,7 +49,7 @@
     <% if initials %>
       <div class="flex justify-center mb-4 relative">
         <%= button_to button_title(title: t('remove'), disabled_with: t('removing')), user_initials_path, method: :delete, class: 'right-0 top-0 absolute link' %>
-        <img src="<%= initials.url %>" style="max-height: 200px; width: auto" width="<%= initials.metadata['width'] %>" height="<%= initials.metadata['height'] %>">
+        <img src="<%= initials.url %>" alt="<%= t('your_initials') %>" style="max-height: 200px; width: auto" width="<%= initials.metadata['width'] %>" height="<%= initials.metadata['height'] %>">
       </div>
     <% end %>
     <a href="<%= edit_user_initials_path %>" data-turbo-frame="modal" class="base-button w-full">

app/views/submissions/_value.html.erb

@@ -10,7 +10,7 @@
     <% is_narrow = area['h'].positive? && ((area['w'] * local_assigns[:page_width]).to_f / (area['h'] * local_assigns[:page_height])) > 4.5 %>
     <div class="flex justify-between w-full h-full gap-1 <%= is_narrow && (local_assigns[:with_signature_id] || field.dig('preferences', 'reason_field_uuid').present?) ? 'flex-row' : 'flex-col' %>">
       <div class="flex overflow-hidden <%= is_narrow && (local_assigns[:with_signature_id] || field.dig('preferences', 'reason_field_uuid').present?) ? 'w-1/2' : 'flex-grow' %>" style="min-height: 50%">
-        <img class="object-contain mx-auto" src="<%= attachments_index[value].url %>">
+        <img class="object-contain mx-auto" src="<%= attachments_index[value].url %>" alt="<%= field['name'].presence || t('signature_field') %>">
       </div>
       <% if (local_assigns[:with_signature_id] || field.dig('preferences', 'reason_field_uuid').present?) && attachment = attachments_index[value] %>
         <div class="text-[1vw] lg:text-[0.55rem] lg:leading-[0.65rem] <%= is_narrow ? 'w-1/2' : 'w-full' %>">
@@ -34,7 +34,7 @@
       <% end %>
     </div>
   <% elsif field['type'].in?(['image', 'initials', 'stamp', 'kba']) && attachments_index[value].image? %>
-    <img class="object-contain mx-auto" src="<%= attachments_index[value].url %>" loading="lazy">
+    <img class="object-contain mx-auto" src="<%= attachments_index[value].url %>" alt="<%= field['name'].presence || t("#{field['type']}_field") %>" loading="lazy">
   <% elsif field['type'].in?(['file', 'payment', 'image']) %>
     <autosize-field></autosize-field>
     <div class="px-0.5 flex flex-col justify-center">

app/views/submissions/show.html.erb

@@ -81,7 +81,7 @@
         <% document = @submission.schema_documents.find { |a| item['attachment_uuid'] == a.uuid } %>
         <% if document.preview_images.first %>
           <scroll-to data-selector-id="page-<%= document.uuid %>-0" class="block cursor-pointer">
-            <img src="<%= (document.preview_images.find { |e| e.filename.base.to_i.zero? } || document.preview_images.first).url %>" width="<%= document.preview_images.first.metadata['width'] %>" height="<%= document.preview_images.first.metadata['height'] %>" class="rounded border" loading="lazy">
+            <img src="<%= (document.preview_images.find { |e| e.filename.base.to_i.zero? } || document.preview_images.first).url %>" width="<%= document.preview_images.first.metadata['width'] %>" height="<%= document.preview_images.first.metadata['height'] %>" alt="<%= t('preview_of') %> <%= item['name'].presence || document.filename.base %>" class="rounded border" loading="lazy">
             <div class="pb-2 pt-1.5 text-center" dir="auto">
               <%= item['name'].presence || document.filename.base %>
             </div>
@@ -105,7 +105,7 @@
           <% (document.metadata.dig('pdf', 'number_of_pages') || (document.preview_images.loaded? ? preview_images_index.size : document.preview_images.size)).times do |index| %>
             <% page = preview_images_index[index] || page_blob_struct.new(metadata: lazyload_metadata, url: preview_document_page_path(document.signed_uuid, "#{index}.jpg")) %>
             <page-container id="<%= "page-#{document.uuid}-#{index}" %>" class="block before:border before:absolute before:top-0 before:bottom-0 before:left-0 before:right-0 before:rounded relative mb-4" style="container-type: size; aspect-ratio: <%= width = page.metadata['width'] %> / <%= height = page.metadata['height'] %>">
-              <img loading="lazy" src="<%= page.url %>" width="<%= width %>" class="rounded" height="<%= height %>">
+              <img loading="lazy" src="<%= page.url %>" width="<%= width %>" class="rounded" height="<%= height %>" alt="<%= t('page') %> <%= index + 1 %> <%= t('of') %> <%= item['name'].presence || document.filename.base %>">
               <div class="top-0 bottom-0 left-0 right-0 absolute">
                 <% document_annots_index[index]&.each do |annot| %>
                   <%= render 'submissions/annotation', annot: %>
@@ -260,10 +260,10 @@
               <div dir="auto">
                 <% if field['type'].in?(%w[signature initials]) %>
                   <div class="w-full bg-base-300 py-1">
-                    <img class="object-contain mx-auto" style="max-height: <%= field['type'] == 'signature' ? 100 : 50 %>px" height="<%= attachments_index[value].metadata['height'] %>" width="<%= attachments_index[value].metadata['width'] %>" src="<%= attachments_index[value].url %>" loading="lazy">
+                    <img class="object-contain mx-auto" style="max-height: <%= field['type'] == 'signature' ? 100 : 50 %>px" height="<%= attachments_index[value].metadata['height'] %>" width="<%= attachments_index[value].metadata['width'] %>" src="<%= attachments_index[value].url %>" alt="<%= field['name'].presence || t("#{field['type']}_field") %>" loading="lazy">
                   </div>
                 <% elsif field['type'].in?(['image', 'stamp', 'kba']) && attachments_index[value].image? %>
-                  <img class="object-contain mx-auto max-h-28" style="max-height: 200px" height="<%= attachments_index[value].metadata['height'] %>" width="<%= attachments_index[value].metadata['width'] %>" src="<%= attachments_index[value].url %>" loading="lazy">
+                  <img class="object-contain mx-auto max-h-28" style="max-height: 200px" height="<%= attachments_index[value].metadata['height'] %>" width="<%= attachments_index[value].metadata['width'] %>" src="<%= attachments_index[value].url %>" alt="<%= field['name'].presence || t("#{field['type']}_field") %>" loading="lazy">
                 <% elsif field['type'].in?(['file', 'payment', 'image']) %>
                   <div class="flex flex-col justify-center">
                     <% Array.wrap(value).each do |val| %>

app/views/submit_form/show.html.erb

@@ -67,7 +67,7 @@
           <% (document.metadata.dig('pdf', 'number_of_pages') || (document.preview_images.loaded? ? preview_images_index.size : document.preview_images.size)).times do |index| %>
             <% page = preview_images_index[index] || page_blob_struct.new(metadata: lazyload_metadata, url: preview_document_page_path(document.signed_uuid, "#{index}.jpg")) %>
             <page-container class="block relative my-4 shadow-md" style="container-type: size; aspect-ratio: <%= width = page.metadata['width'] %> / <%= height = page.metadata['height'] %>">
-              <img loading="lazy" src="<%= page.url %>" width="<%= width %>" height="<%= height %>">
+              <img loading="lazy" src="<%= page.url %>" width="<%= width %>" height="<%= height %>" alt="<%= t('page') %> <%= index + 1 %> <%= t('of') %> <%= item['name'].presence || document.filename.base %>">
               <div id="page-<%= [document.uuid, index].join('-') %>" class="top-0 bottom-0 left-0 right-0 absolute">
                 <% if annots = document_annots_index[index] %>
                   <%= render 'submit_form/annotations', annots: %>