feat: add plain text only setting for email composer #105

components/settings/email-settings.tsx

@@ -40,6 +40,7 @@ export function EmailSettings() {
     permanentlyDeleteJunk,
     showPreview,
     disableThreading,
+    plainTextMode,
     emailsPerPage,
     externalContentPolicy,
     mailAttachmentAction,
@@ -221,6 +222,14 @@ export function EmailSettings() {
         />
       </SettingItem>
 
+      {/* Plain Text Mode */}
+      <SettingItem label={t('plain_text_mode.label')} description={t('plain_text_mode.description')}>
+        <ToggleSwitch
+          checked={plainTextMode}
+          onChange={(checked) => updateSetting('plainTextMode', checked)}
+        />
+      </SettingItem>
+
       {/* Quick Hover Actions */}
       {isFeatureEnabled('hoverActionsConfigEnabled') && (
       <div className="py-3 border-b border-border space-y-3">