feature: localization's first implmentation done. all frontend hardcoded text is now localized.

frontend/src/app/[locale]/(dashboard)/settings/account/page.tsx

@@ -1,8 +1,12 @@
 'use client';
 
+import { useTranslations } from 'next-intl';
 import { Link } from '@/i18n/navigation';
 
 export default function AccountSettingsPage() {
+  const t = useTranslations('settings');
+  const tCommon = useTranslations('common');
+
   return (
     <div className="space-y-6">
       <div>
@@ -10,19 +14,14 @@ export default function AccountSettingsPage() {
           href="/today"
           className="text-sm text-primary hover:opacity-90"
         >
-          ← Back to app
+          {tCommon('backToApp')}
         </Link>
-        <h1 className="text-2xl font-semibold text-text-primary mt-4">Account</h1>
-        <p className="text-text-secondary text-sm mt-2">
-          Profile and security settings for your login.
-        </p>
+        <h1 className="text-2xl font-semibold text-text-primary mt-4">{t('accountTitle')}</h1>
+        <p className="text-text-secondary text-sm mt-2">{t('accountSubtitle')}</p>
       </div>
 
       <div className="surface-card p-6 space-y-3">
-        <p className="text-sm text-text-secondary">
-          Password change and profile editing will be wired here next (e.g. invite
-          flow, reset password).
-        </p>
+        <p className="text-sm text-text-secondary">{t('accountPlaceholder')}</p>
       </div>
     </div>
   );