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

frontend/src/components/ui/treatment/CaseSentLabel.tsx

@@ -1,3 +1,6 @@
+'use client';
+
+import { useTranslations } from 'next-intl';
 import { formatCaseSentLines } from '@/components/treatment/caseSendLabel';
 import type { LinkedOrganizationOption, PastTreatmentCase, TreatmentCaseDraft } from '@/types/treatment';
 
@@ -11,11 +14,12 @@ interface CaseSentLabelProps {
 }
 
 export function CaseSentLabel({ treatmentCase, orgs, className = 'text-xs text-text-muted' }: CaseSentLabelProps) {
+  const t = useTranslations('treatment');
   const lines = formatCaseSentLines(treatmentCase.sends, {
     organizationIds: treatmentCase.sendToOrganizationIds ?? [],
     sentAt: treatmentCase.sentAt ?? null,
     orgs,
-  });
+  }, t);
 
   if (lines.length === 0) return null;