Add link to drawingPaperTemplate in UI

src/App.jsx

@@ -484,6 +484,14 @@ export default function App() {
         </div>
 
         <div className="flex items-center space-x-3">
+          <a
+            href="./drawingPaperTemplate.html"
+            target="_blank"
+            rel="noopener noreferrer"
+            className="flex items-center gap-2 px-3 py-1.5 bg-purple-600 hover:bg-purple-500 rounded text-xs font-medium transition-all text-white no-underline"
+          >
+            Template
+          </a>
           <div className="flex space-x-2">
             <label className="flex items-center gap-2 px-3 py-1.5 bg-gray-700 hover:bg-gray-600 rounded cursor-pointer text-xs transition-colors border border-gray-600">
               <Upload size={14} /> <span>Image A</span>