Update app.py

app.py

@@ -213,11 +213,13 @@ HTML_CONTENT = """
         const resultContainer = document.getElementById('resultContainer');
         const dropZone = document.getElementById('dropZone');
 
+        let selectedFiles = [];
+
         fileInput.addEventListener('change', handleFiles);
 
         uploadBtn.addEventListener('click', () => {
-            if (fileInput.files.length > 0) {
-                uploadFiles(fileInput.files);
+            if (selectedFiles.length > 0) {
+                uploadFiles(selectedFiles);
             }
         });
 
@@ -253,8 +255,9 @@ HTML_CONTENT = """
         });
 
         function handleFiles(e) {
-            if (e.target.files.length > 0) {
-                const fileNames = Array.from(e.target.files).map(file => file.name).join(', ');
+            selectedFiles = Array.from(e.target.files);
+            if (selectedFiles.length > 0) {
+                const fileNames = selectedFiles.map(file => file.name).join(', ');
                 fileName.textContent = fileNames;
                 uploadBtn.style.display = 'inline-block';
             }
@@ -268,7 +271,7 @@ HTML_CONTENT = """
             resultContainer.innerHTML = '';
             resultContainer.style.display = 'none';
 
-            Array.from(files).forEach((file, index) => {
+            files.forEach((file, index) => {
                 const progressBar = createProgressBar(file.name);
                 progressContainer.appendChild(progressBar);
                 uploadFile(file, progressBar, index);
@@ -309,13 +312,13 @@ HTML_CONTENT = """
                 } else {
                     alert('Upload failed: ' + xhr.statusText);
                 }
-                if (index === fileInput.files.length - 1) {
+                if (index === selectedFiles.length - 1) {
                     resetUploadState();
                 }
             };
             xhr.onerror = function() {
                 alert('Upload failed: Network error');
-                if (index === fileInput.files.length - 1) {
+                if (index === selectedFiles.length - 1) {
                     resetUploadState();
                 }
             };
@@ -335,6 +338,7 @@ HTML_CONTENT = """
             uploadBtn.style.display = 'none';
             uploadBtn.disabled = false;
             loadingSpinner.style.display = 'none';
+            selectedFiles = [];
         }
 
         function addResultLink(url, fileName) {