Fix WCAG 2.1 AA low-priority issues: aria-busy, keyboard nav, live regions, ARIA states

- L1: download_button.js — set aria-busy="true/false" in toggleState() during downloads (WCAG 4.1.3)
- L2: submit_form.js — announce auto-submit via data-announce-submit + announcePolite (WCAG 4.1.3)
- L3: toggle_submit.js — set aria-busy="true" on submit button when form submits (WCAG 4.1.2)
- L4: indeterminate_checkbox.js — set aria-checked="mixed" when indeterminate; update on click (WCAG 4.1.2)
- L5: review_form.js — announcePolite("Rating submitted") before auto-submit at rating 10 (WCAG 4.1.3)
- L6: masked_input.js — append sr-only hint with aria-describedby explaining masking behavior (WCAG 3.3.2)
- L7: check_on_click.js — add keydown handler for Enter/Space keys (WCAG 2.1.1)
- L9: submit_form/show.html.erb — add aria-label to icon-only download button in scroll-buttons (WCAG 4.1.2)
- L11: initials_step.vue — add :aria-label="t('minimize')" to minimize button (WCAG 4.1.2)
- L13: _drawer_events.html.erb — fix CSS typo border-base-content-/60 → border-base-content/60
- L8: app_tour.js — driver.js provides keyboard support natively (Escape/Enter); no change needed
- L10: _html_modal.html.erb — role="button" tabindex="0" aria-label already applied in Sprint 1
- L12: text-base-content/60 contrast — verified compliant at typical DaisyUI theme ratios

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/javascript/elements/check_on_click.js

@@ -1,11 +1,19 @@
 export default class extends HTMLElement {
   connectedCallback () {
-    this.addEventListener('click', () => {
+    this.addEventListener('click', this.handleCheck)
+    this.addEventListener('keydown', (e) => {
+      if (e.key === 'Enter' || e.key === ' ') {
+        e.preventDefault()
+        this.handleCheck()
+      }
+    })
+  }
+
+  handleCheck = () => {
     if (this.element && !this.element.disabled && !this.element.checked) {
       this.element.checked = true
       this.element.dispatchEvent(new Event('change', { bubbles: true }))
     }
-    })
   }
 
   get element () {

app/javascript/elements/download_button.js

@@ -27,6 +27,8 @@ export default targetable(class extends HTMLElement {
   toggleState () {
     this.defaultButton?.classList?.toggle('hidden')
     this.loadingButton?.classList?.toggle('hidden')
+    // aria-busy reflects whether the loading state is now active (loadingButton visible)
+    this.setAttribute('aria-busy', this.loadingButton?.classList?.contains('hidden') ? 'false' : 'true')
   }
 
   downloadFiles () {

app/javascript/elements/indeterminate_checkbox.js

@@ -3,6 +3,7 @@ export default class extends HTMLElement {
     if (this.dataset.indeterminate === 'true') {
       this.checkbox.indeterminate = true
       this.checkbox.readOnly = true
+      this.checkbox.setAttribute('aria-checked', 'mixed')
     }
 
     this.checkbox.addEventListener('click', () => {
@@ -14,6 +15,7 @@ export default class extends HTMLElement {
 
       if (this.checkbox.readOnly) {
         this.checkbox.checked = this.checkbox.readOnly = false
+        this.checkbox.setAttribute('aria-checked', 'false')
       } else if (!this.checkbox.checked) {
         if (this.showIndeterminateEl) {
           this.showIndeterminateEl.classList.remove('hidden')
@@ -21,6 +23,9 @@ export default class extends HTMLElement {
 
         this.checkbox.setAttribute('name', this.dataset.indeterminateName)
         this.checkbox.checked = this.checkbox.readOnly = this.checkbox.indeterminate = true
+        this.checkbox.setAttribute('aria-checked', 'mixed')
+      } else {
+        this.checkbox.setAttribute('aria-checked', 'true')
       }
     })
   }

app/javascript/elements/masked_input.js

@@ -2,6 +2,16 @@ export default class extends HTMLElement {
   connectedCallback () {
     const maskedToken = this.input.value
 
+    const hintId = `masked-input-hint-${Math.random().toString(36).slice(2, 8)}`
+    const hint = document.createElement('span')
+    hint.id = hintId
+    hint.className = 'sr-only'
+    hint.textContent = this.dataset.maskHint || 'Value is masked. Focus to reveal.'
+    this.appendChild(hint)
+
+    const existing = this.input.getAttribute('aria-describedby')
+    this.input.setAttribute('aria-describedby', existing ? `${existing} ${hintId}` : hintId)
+
     this.input.addEventListener('focus', () => {
       this.input.value = this.dataset.token
       this.input.select()

app/javascript/elements/review_form.js

@@ -1,3 +1,5 @@
+import { announcePolite } from './aria_announce'
+
 export default class extends HTMLElement {
   connectedCallback () {
     this.querySelectorAll('input[type="radio"]').forEach(radio => {
@@ -8,6 +10,7 @@ export default class extends HTMLElement {
           window.review_comment.value = ''
           window.review_comment.classList.add('hidden')
           window.review_submit.classList.add('hidden')
+          announcePolite('Rating submitted')
           event.target.form.submit()
         } else {
           window.review_comment.classList.remove('hidden')

app/javascript/elements/submit_form.js

@@ -1,3 +1,5 @@
+import { announcePolite } from './aria_announce'
+
 export default class extends HTMLElement {
   connectedCallback () {
     const form = this.querySelector('form') || (this.querySelector('input, button, select') || this.lastElementChild).form
@@ -14,9 +16,11 @@ export default class extends HTMLElement {
 
         if (this.dataset.submitIfValue === 'true') {
           if (event.target.value) {
+            if (this.dataset.announceSubmit) announcePolite(this.dataset.announceSubmit)
             form.requestSubmit()
           }
         } else {
+          if (this.dataset.announceSubmit) announcePolite(this.dataset.announceSubmit)
           form.requestSubmit()
         }
       })

app/javascript/elements/toggle_submit.js

@@ -4,6 +4,7 @@ export default class extends HTMLElement {
 
     this.form.addEventListener('submit', () => {
       this.button.disabled = true
+      this.button.setAttribute('aria-busy', 'true')
     })
   }
 

app/javascript/submission_form/initials_step.vue

@@ -89,6 +89,7 @@
         </a>
         <a
           :title="t('minimize')"
+          :aria-label="t('minimize')"
           href="#"
           class="py-1.5 inline md:hidden"
           @click.prevent="$emit('minimize')"

app/views/submit_form/show.html.erb

@@ -48,7 +48,7 @@
               </span>
             </label>
           <% end %>
-          <download-button data-src="<%= submit_form_download_index_path(@submitter.slug) %>" class="btn btn-neutral text-white btn-sm px-2">
+          <download-button data-src="<%= submit_form_download_index_path(@submitter.slug) %>" class="btn btn-neutral text-white btn-sm px-2" aria-label="<%= t('download') %>">
             <span data-target="download-button.defaultButton">
               <%= svg_icon('download', class: 'w-5 h-5') %>
             </span>

app/views/webhook_events/_drawer_events.html.erb

@@ -5,7 +5,7 @@
       <% last_attempt = webhook_attempts.select { |e| e.attempt < SendWebhookRequest::MANUAL_ATTEMPT }.max_by(&:attempt) %>
       <% if webhook_event.webhook_attempts.none?(&:success?) && last_attempt.attempt <= 10 %>
         <li class="ml-7">
-          <span class="btn btn-outline btn-xs btn-circle pointer-events-none absolute justify-center border-base-content-/60 text-base-content/60 bg-base-100" style="left: -12px;">
+          <span class="btn btn-outline btn-xs btn-circle pointer-events-none absolute justify-center border-base-content/60 text-base-content/60 bg-base-100" style="left: -12px;">
             <%= svg_icon('clock', class: 'w-4 h-4 shrink-0') %>
           </span>
           <p class="leading-none text-base-content/90 pt-1">