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

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

@@ -1,14 +1,16 @@
 'use client';
 
+import { useTranslations } from 'next-intl';
 import { TreatmentWorkspace } from '@/components/ui/treatment/TreatmentWorkspace';
 import { useAuth } from '@/lib/hooks/useAuth';
 
 export default function TreatmentPage() {
+  const t = useTranslations('treatment');
   const { user, currentOrganization, isAuthReady } = useAuth();
 
   if (!isAuthReady || !user) {
     return (
-      <div className="text-sm text-text-muted">Loading…</div>
+      <div className="text-sm text-text-muted">{t('loading')}</div>
     );
   }