Fix form data files being replaced by the last decrypted file

src/main/resources/static/js/downloader.js

@@ -75,9 +75,10 @@
           // Check if any PDF files are encrypted and handle decryption if necessary
           const decryptedFiles = await checkAndDecryptFiles(url, files);
           files = decryptedFiles;
+          formData.delete('fileInput'); // Reset fileInput and Append
           // Append decrypted files to formData
           decryptedFiles.forEach((file, index) => {
-            formData.set(`fileInput`, file);
+            formData.append(`fileInput`, file);
           });
         }