Update app.py

app.py

@@ -208,8 +208,7 @@ def index():
         function updateFormDataPreview(formJson) {
             const previewDiv = document.getElementById('formDataPreview');
             previewDiv.innerHTML = '<strong>Form data (JSON):</strong><br>' + 
-                JSON.stringify(formJson, null, 2) + 
-                ' <span class="comment">// この値がフォーム部分です。</span>';
+                JSON.stringify(formJson, null, 2);
         }
         
         function updateFetchCode() {
@@ -226,7 +225,7 @@ fetch('${apiUrl}', {
     headers: {
         'Content-Type': 'multipart/form-data'
     },
-    body: formData
+    body: ${JSON.stringify(formJson, null, 2)}
 })
 .then(response => {
     if (!response.ok) {