Add note to signatures

frontend/src/components/SignatureCard.tsx

@@ -74,6 +74,13 @@ export const SignatureCard = ({ signature, onDelete, onUpdate }: SignatureCardPr
               <h3 className="text-white font-medium text-lg">
                 {signature.signame || 'Unnamed Signature'}
               </h3>
+              {signature.note && (
+                <div className="mt-2">
+                  <Badge variant="outline" className="bg-blue-900/50 text-blue-200 border-blue-500 px-3 py-1 text-sm font-semibold">
+                    {signature.note}
+                  </Badge>
+                </div>
+              )}
             </div>
             
             {/* Additional Info */}