Fix require() of ES Module /app/node_modules/marked/lib/marked.esm.js from /app/server.js not supported.

server.js

@@ -18,7 +18,6 @@ const pdfParse = require('pdf-parse'); // For PDF files
 const ExcelJS = require('exceljs'); // For Excel files
 
 // Markdown and HTML processing
-const { marked } = require('marked');
 const createDOMPurify = require('dompurify');
 const { JSDOM } = require('jsdom');
 
@@ -26,6 +25,16 @@ const { JSDOM } = require('jsdom');
 const window = new JSDOM('').window;
 const DOMPurify = createDOMPurify(window);
 
+// Dynamic import for marked (ES module)
+let marked = null;
+async function initializeMarked() {
+  if (!marked) {
+    const markedModule = await import('marked');
+    marked = markedModule.marked;
+  }
+  return marked;
+}
+
 // Helper function to extract text from various document formats
 async function extractTextFromDocument(filePath, fileExtension) {
   try {
@@ -1454,7 +1463,7 @@ app.post('/api/render-revised-content', requireAuth, async (req, res) => {
       case 'html':
         if (isMarkdownContent || autoDetect === false) {
           // Convert markdown to safe HTML
-          renderedContent = markdownToSafeHtml(content);
+          renderedContent = await markdownToSafeHtml(content);
         } else {
           // Just escape HTML and preserve line breaks for plain text
           renderedContent = escapeHtml(content).replace(/\n/g, '<br>');
@@ -2705,10 +2714,13 @@ app.listen(PORT, () => {
 });
 
 // Helper function to convert markdown to safe HTML
-function markdownToSafeHtml(markdownText) {
+async function markdownToSafeHtml(markdownText) {
   try {
+    // Initialize marked with dynamic import
+    const markedInstance = await initializeMarked();
+    
     // Configure marked options for better security and features
-    marked.setOptions({
+    markedInstance.setOptions({
       gfm: true, // GitHub Flavored Markdown
       breaks: true, // Convert line breaks to <br>
       sanitize: false, // We'll use DOMPurify instead for better control
@@ -2718,7 +2730,7 @@ function markdownToSafeHtml(markdownText) {
     });
 
     // Convert markdown to HTML
-    const rawHtml = marked.parse(markdownText);
+    const rawHtml = markedInstance.parse(markdownText);
 
     // Sanitize the HTML with DOMPurify
     const cleanHtml = DOMPurify.sanitize(rawHtml, {