Week 6: allow links in brief and source text (Markdown [label](url) and plain URLs); no other changes

client/src/pages/TutorialTasks.tsx

@@ -116,6 +116,10 @@ const TutorialTasks: React.FC = () => {
   const renderFormatted = (text: string) => {
     const escape = (s: string) => s.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
     const html = escape(text)
+      // Markdown-style links: [label](https://example.com)
+      .replace(/\[([^\]]+?)\]\((https?:\/\/[^\s)]+)\)/g, '<a href="$2" target="_blank" rel="noopener noreferrer">$1</a>')
+      // Plain URLs: https://example.com
+      .replace(/(https?:\/\/[^\s<]+[^\s<\.)])/g, '<a href="$1" target="_blank" rel="noopener noreferrer">$1</a>')
       .replace(/\*\*(.+?)\*\*/g, '<strong>$1</strong>')
       .replace(/\*(.+?)\*/g, '<em>$1</em>')
       .replace(/\n/g, '<br/>');