feature: localization's first implmentation

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

@@ -0,0 +1,18 @@
+'use client';
+
+import { TreatmentWorkspace } from '@/components/ui/treatment/TreatmentWorkspace';
+import { useAuth } from '@/lib/hooks/useAuth';
+
+export default function TreatmentPage() {
+  const { user, currentOrganization, isAuthReady } = useAuth();
+
+  if (!isAuthReady || !user) {
+    return (
+      <div className="text-sm text-text-muted">Loading…</div>
+    );
+  }
+
+  return (
+    <TreatmentWorkspace userId={user.id} currentOrganization={currentOrganization} />
+  );
+}