feature: a mocked implementation of v1 UI done.

frontend/src/app/(dashboard)/treatment/page.tsx

@@ -1,10 +1,18 @@
+'use client';
+
+import { TreatmentWorkspace } from '@/components/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 (
-    <div className="space-y-3">
-      <h1 className="text-2xl font-semibold text-text-primary">Treatment</h1>
-      <p className="text-sm text-text-secondary">
-        Treatment module is coming soon.
-      </p>
-    </div>
+    <TreatmentWorkspace userId={user.id} currentOrganization={currentOrganization} />
   );
 }