fix

views/detail.ejs

@@ -140,7 +140,7 @@
                             const a = document.createElement('a');
                             a.style.display = 'none';
                             a.href = url;
-                            a.download = '<%= detail._id %>.jpeg';
+                            a.download = '<%= detail._id %>.webp';
                             document.body.appendChild(a);
                             a.click();
                             URL.revokeObjectURL(url);