fix: name the search and filter fields for screen readers

src/screens/EmailListScreen.tsx

@@ -393,10 +393,13 @@ const EmailListItem = React.memo(function EmailListItem({
 function DebouncedFilterInput({
   value,
   onCommit,
+  accessibilityLabel,
   ...props
-}: Omit<React.ComponentProps<typeof TextInput>, 'value' | 'onChangeText'> & {
+}: Omit<React.ComponentProps<typeof TextInput>, 'value' | 'onChangeText' | 'accessibilityLabel'> & {
   value: string;
   onCommit: (value: string) => void;
+  /** The field's name for screen readers: its label sits beside it as separate Text. */
+  accessibilityLabel: string;
 }) {
   const [text, setText] = React.useState(value);
   React.useEffect(() => { setText(value); }, [value]);
@@ -410,6 +413,7 @@ function DebouncedFilterInput({
   return (
     <TextInput
       {...props}
+      accessibilityLabel={accessibilityLabel}
       value={text}
       onChangeText={setText}
       returnKeyType="search"
@@ -1280,6 +1284,7 @@ export default function EmailListScreen({
           disableFullscreenUI
           ref={searchInputRef}
           style={styles.searchInput}
+          accessibilityLabel={t('advanced_search.search', 'Search')}
           placeholder={t('email_list.search_placeholder', 'Search mail...')}
           placeholderTextColor={c.textMuted}
           value={searchInput}
@@ -1831,6 +1836,7 @@ export default function EmailListScreen({
                       <DebouncedFilterInput
                         value={filters.from ?? ''}
                         onCommit={(v) => setFilterField('from', v)}
+                        accessibilityLabel={t('advanced_search.from', 'From')}
                         placeholder={t('advanced_search.from_placeholder', 'Sender email or name')}
                         placeholderTextColor={c.textMuted}
                         autoCapitalize="none"
@@ -1843,6 +1849,7 @@ export default function EmailListScreen({
                       <DebouncedFilterInput
                         value={filters.to ?? ''}
                         onCommit={(v) => setFilterField('to', v)}
+                        accessibilityLabel={t('advanced_search.to', 'To')}
                         placeholder={t('advanced_search.to_placeholder', 'Recipient email or name')}
                         placeholderTextColor={c.textMuted}
                         autoCapitalize="none"
@@ -1857,6 +1864,7 @@ export default function EmailListScreen({
                     <DebouncedFilterInput
                       value={filters.subject ?? ''}
                       onCommit={(v) => setFilterField('subject', v)}
+                      accessibilityLabel={t('advanced_search.subject', 'Subject')}
                       placeholder={t('advanced_search.subject_placeholder', 'Subject contains...')}
                       placeholderTextColor={c.textMuted}
                       style={styles.filterFieldInput}
@@ -1868,6 +1876,7 @@ export default function EmailListScreen({
                     <DebouncedFilterInput
                       value={filters.body ?? ''}
                       onCommit={(v) => setFilterField('body', v)}
+                      accessibilityLabel={t('advanced_search.body', 'Body')}
                       placeholder={t('advanced_search.body_placeholder', 'Body contains...')}
                       placeholderTextColor={c.textMuted}
                       style={styles.filterFieldInput}

src/screens/UnifiedInboxScreen.tsx

@@ -517,6 +517,7 @@ export default function UnifiedInboxScreen({ navigation, route }: Props) {
           // and the text around the field.
           disableFullscreenUI
           style={styles.searchInput}
+          accessibilityLabel={t('advanced_search.search', 'Search')}
           placeholder={t('email_list.search_placeholder', 'Search mail...')}
           placeholderTextColor={c.textMuted}
           value={searchInput}

src/screens/__tests__/search-field-names.test.ts

@@ -0,0 +1,41 @@
+// Text fields need a name a screen reader can say (webmail ef13556a0,
+// dcc21acd0, 4e2affe40, f73643bbb). The search field of the folder list and
+// the unified views, and the From/To/Subject/Body fields of the filter
+// panel, had only a placeholder, which isn't read once the field holds
+// text; the filter labels are separate Text beside the field. Same scan as
+// components/__tests__/field-names.test.ts.
+import { describe, expect, it } from 'vitest';
+import { readFileSync } from 'node:fs';
+import { join } from 'node:path';
+
+const SRC = join(__dirname, '..', '..');
+
+function elementEnd(source: string, from: number): number {
+  let depth = 0;
+  for (let i = from; i < source.length; i++) {
+    const ch = source[i];
+    if (ch === '{') depth += 1;
+    else if (ch === '}') depth -= 1;
+    else if (ch === '/' && depth === 0 && source[i + 1] === '>') return i;
+  }
+  return source.length;
+}
+
+/** `file:line` of every TextInput, Input or DebouncedFilterInput element without a name. */
+function unnamedFields(file: string): string[] {
+  const source = readFileSync(join(SRC, file), 'utf8');
+  const out: string[] = [];
+  for (const m of source.matchAll(/<(TextInput|Input|DebouncedFilterInput)\b/g)) {
+    const element = source.slice(m.index!, elementEnd(source, m.index! + m[0].length));
+    if (/\baccessibilityLabel=/.test(element)) continue;
+    if (m[1] === 'Input' && /\blabel=/.test(element)) continue;
+    out.push(`${file}:${source.slice(0, m.index!).split('\n').length}`);
+  }
+  return out;
+}
+
+describe('search field names', () => {
+  it('every field of the mail list, its filter panel and the unified views has a name', () => {
+    expect(['screens/EmailListScreen.tsx', 'screens/UnifiedInboxScreen.tsx'].flatMap(unnamedFields)).toEqual([]);
+  });
+});