feature: dashboard settings and invite activation flow consistency fixed. frontend warnings fixed

frontend/src/components/ui/patient/TreatmentHistoryPreview.tsx

@@ -0,0 +1,37 @@
+import { TreatmentHistoryItem } from '@/types/patient';
+
+interface TreatmentHistoryPreviewProps {
+  items: TreatmentHistoryItem[];
+  loading?: boolean;
+}
+
+export function TreatmentHistoryPreview({ items, loading = false }: TreatmentHistoryPreviewProps) {
+  return (
+    <div className="surface-card p-4 space-y-3">
+      <h3 className="text-base font-semibold text-text-primary">Treatment History</h3>
+
+      {loading && <p className="text-sm text-text-muted">Loading treatment history...</p>}
+
+      {!loading && items.length === 0 && (
+        <p className="text-sm text-text-muted">No treatment history yet.</p>
+      )}
+
+      <div className="space-y-2">
+        {items.map((item) => (
+          <div key={item.id} className="border border-border/60 rounded-[var(--radius-sm)] p-3">
+            <div className="flex items-center justify-between">
+              <p className="text-sm font-medium text-text-primary">{item.title}</p>
+              <p className="text-xs text-text-muted">
+                {new Date(item.treatmentAt).toLocaleDateString()}
+              </p>
+            </div>
+            <p className="text-xs text-text-secondary mt-1">
+              Status: {item.status}
+              {item.tooth ? ` | Tooth: ${item.tooth}` : ''}
+            </p>
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}