fix: name the settings switches for screen readers

A settings switch had a role and a checked state but no label, so
TalkBack only announced "switch, off". A switch inside a SettingItem now
takes that row's label, and the switches outside one (filter rules,
expanded view, template and sidebar app editors, filter rule options)
get their visible label passed explicitly.

src/components/ToggleSwitch.tsx

@@ -7,6 +7,8 @@ interface ToggleSwitchProps {
   value: boolean;
   onValueChange: (val: boolean) => void;
   disabled?: boolean;
+  /** What the switch turns on or off, read out by screen readers. */
+  accessibilityLabel?: string;
 }
 
 /**
@@ -16,7 +18,7 @@ interface ToggleSwitchProps {
  * - thumb: h-4 w-4 rounded-full bg-background
  * - translate-x-6 (checked) / translate-x-1 (unchecked)
  */
-export default function ToggleSwitch({ value, onValueChange, disabled = false }: ToggleSwitchProps) {
+export default function ToggleSwitch({ value, onValueChange, disabled = false, accessibilityLabel }: ToggleSwitchProps) {
   const c = useColors();
   const styles = React.useMemo(() => makeStyles(c), [c]);
   return (
@@ -28,6 +30,7 @@ export default function ToggleSwitch({ value, onValueChange, disabled = false }:
       ]}
       onPress={() => !disabled && onValueChange(!value)}
       accessibilityRole="switch"
+      accessibilityLabel={accessibilityLabel}
       accessibilityState={{ checked: value, disabled }}
     >
       <View

src/components/filters/FilterRuleModal.tsx

@@ -400,6 +400,7 @@ export function FilterRuleModal({ visible, rule, mailboxes, onSave, onClose }: F
                           <ToggleSwitch
                             checked={!!action.keepCopy}
                             onChange={(v) => updateAction(index, { keepCopy: v || undefined })}
+                            accessibilityLabel={t('settings.filters.forward_keep_copy', 'Keep a copy')}
                           />
                         </View>
                       </>
@@ -446,7 +447,11 @@ export function FilterRuleModal({ visible, rule, mailboxes, onSave, onClose }: F
               <Text style={styles.stopLabel}>
                 {t('settings.filters.stop_processing', 'Stop processing subsequent rules')}
               </Text>
-              <ToggleSwitch checked={stopProcessing} onChange={setStopProcessing} />
+              <ToggleSwitch
+                checked={stopProcessing}
+                onChange={setStopProcessing}
+                accessibilityLabel={t('settings.filters.stop_processing', 'Stop processing subsequent rules')}
+              />
             </View>
 
             {/* Folder rules skip spam unless the rule opts in (webmail 6241ed61). */}
@@ -455,7 +460,11 @@ export function FilterRuleModal({ visible, rule, mailboxes, onSave, onClose }: F
                 <Text style={styles.stopLabel}>
                   {t('settings.filters.include_spam', 'Also move messages marked as spam')}
                 </Text>
-                <ToggleSwitch checked={includeSpam} onChange={setIncludeSpam} />
+                <ToggleSwitch
+                  checked={includeSpam}
+                  onChange={setIncludeSpam}
+                  accessibilityLabel={t('settings.filters.include_spam', 'Also move messages marked as spam')}
+                />
               </View>
             )}
           </ScrollView>

src/components/settings/FilterSettings.tsx

@@ -385,7 +385,7 @@ export function FilterSettings({ onOpenVacation }: FilterSettingsProps = {}) {
               return (
                 <View key={rule.id} style={[styles.ruleRow, !rule.enabled && styles.ruleDisabled]}>
                   <View style={{ paddingTop: 2 }}>
-                    <ToggleSwitch checked={rule.enabled} onChange={() => handleToggle(rule.id)} />
+                    <ToggleSwitch checked={rule.enabled} onChange={() => handleToggle(rule.id)} accessibilityLabel={rule.name} />
                   </View>
 
                   <Pressable
@@ -458,7 +458,11 @@ export function FilterSettings({ onOpenVacation }: FilterSettingsProps = {}) {
           {!isOpaque && rules.length > 0 && (
             <View style={styles.expandedToggle}>
               <Text style={styles.expandedLabel}>{t('settings.filters.expanded_view', 'Expanded view')}</Text>
-              <ToggleSwitch checked={expandedView} onChange={(v) => updateSetting('filtersExpandedView', v)} />
+              <ToggleSwitch
+                checked={expandedView}
+                onChange={(v) => updateSetting('filtersExpandedView', v)}
+                accessibilityLabel={t('settings.filters.expanded_view', 'Expanded view')}
+              />
             </View>
           )}
         </View>

src/components/settings/SidebarAppsSettings.tsx

@@ -188,7 +188,11 @@ function AppForm({ initial, onSave, onCancel }: AppFormProps) {
 
       <View style={{ flexDirection: 'row', alignItems: 'center', justifyContent: 'space-between' }}>
         <Text style={formStyles.label}>{t('settings.sidebar_apps.form.show_on_mobile', "Show on mobile")}</Text>
-        <ToggleSwitch checked={showOnMobile} onChange={setShowOnMobile} />
+        <ToggleSwitch
+          checked={showOnMobile}
+          onChange={setShowOnMobile}
+          accessibilityLabel={t('settings.sidebar_apps.form.show_on_mobile', "Show on mobile")}
+        />
       </View>
 
       <View style={{ flexDirection: 'row', gap: spacing.sm, justifyContent: 'flex-end' }}>

src/components/settings/TemplateSettings.tsx

@@ -246,11 +246,19 @@ export function TemplateSettings() {
               </Text>
               <View style={styles.toggleRow}>
                 <Text style={styles.toggleLabel}>{tr('settings.templates.favorite', 'Favorite')}</Text>
-                <ToggleSwitch checked={draftFavorite} onChange={setDraftFavorite} />
+                <ToggleSwitch
+                  checked={draftFavorite}
+                  onChange={setDraftFavorite}
+                  accessibilityLabel={tr('settings.templates.favorite', 'Favorite')}
+                />
               </View>
               <View style={styles.toggleRow}>
                 <Text style={styles.toggleLabel}>{tr('settings.templates.is_html', 'Body is HTML')}</Text>
-                <ToggleSwitch checked={draftIsHtml} onChange={setDraftIsHtml} />
+                <ToggleSwitch
+                  checked={draftIsHtml}
+                  onChange={setDraftIsHtml}
+                  accessibilityLabel={tr('settings.templates.is_html', 'Body is HTML')}
+                />
               </View>
             </ScrollView>
             <View style={styles.modalActions}>

src/components/settings/settings-section.tsx

@@ -1,4 +1,4 @@
-import React, { useState } from 'react';
+import React, { useContext, useState } from 'react';
 import {
   View,
   Text,
@@ -65,6 +65,10 @@ export function SettingsSection({
   );
 }
 
+// The label of the SettingItem a control sits in. A switch has no text of
+// its own, so without it a screen reader only announces "switch, off".
+const SettingLabelContext = React.createContext<string | undefined>(undefined);
+
 interface SettingItemProps {
   label: string;
   description?: string;
@@ -96,7 +100,11 @@ export function SettingItem({
         </View>
         {description && <Text style={styles.settingDescription}>{description}</Text>}
       </View>
-      {children && <View style={styles.settingRight}>{children}</View>}
+      {children && (
+        <SettingLabelContext.Provider value={label}>
+          <View style={styles.settingRight}>{children}</View>
+        </SettingLabelContext.Provider>
+      )}
     </View>
   );
 }
@@ -105,14 +113,18 @@ interface ToggleSwitchProps {
   checked: boolean;
   onChange: (v: boolean) => void;
   disabled?: boolean;
+  /** Defaults to the label of the enclosing SettingItem. */
+  accessibilityLabel?: string;
 }
 
-export function ToggleSwitch({ checked, onChange, disabled }: ToggleSwitchProps) {
+export function ToggleSwitch({ checked, onChange, disabled, accessibilityLabel }: ToggleSwitchProps) {
+  const settingLabel = useContext(SettingLabelContext);
   return (
     <ToggleSwitchComponent
       value={checked}
       onValueChange={onChange}
       disabled={disabled}
+      accessibilityLabel={accessibilityLabel ?? settingLabel}
     />
   );
 }