fix: mdToHtml rendert Ueberschriften und Listen korrekt

Vorherige Version entfernte alle ## Headlines und ignorierte
Aufzaehlungen. Neue Version rendert h2/h3 und ul/li.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

vorschau/js/app.js

@@ -113,21 +113,36 @@
     });
 
     /* ==================== SIMPLE MARKDOWN ==================== */
-    function mdToHtml(md) {
+function mdToHtml(md) {
         if (!md) return '';
-        return md
-            .replace(/^## .+$/gm, '')
-            .replace(/^### .+$/gm, '')
-            .replace(/\*\*(.+?)\*\*/g, '<strong>$1</strong>')
-            .replace(/\[(\d+[a-z]?)\]/g, '')
-            .replace(/\n{3,}/g, '\n\n')
-            .trim()
-            .split('\n\n')
-            .filter(function (p) { return p.trim().length > 0; })
-            .map(function (p) { return '<p>' + p.trim().replace(/\n/g, ' ') + '</p>'; })
-            .join('');
+        var lines = md.split('\n');
+        var html = '';
+        var inList = false;
+        for (var i = 0; i < lines.length; i++) {
+            var line = lines[i].trim();
+            if (!line) {
+                if (inList) { html += '</ul>'; inList = false; }
+                continue;
+            }
+            line = line.replace(/\[(\d+[a-z]?)\]/g, '');
+            line = line.replace(/\*\*(.+?)\*\*/g, '<strong>$1</strong>');
+            if (/^## /.test(line)) {
+                if (inList) { html += '</ul>'; inList = false; }
+                html += '<h2>' + line.replace(/^## /, '') + '</h2>';
+            } else if (/^### /.test(line)) {
+                if (inList) { html += '</ul>'; inList = false; }
+                html += '<h3>' + line.replace(/^### /, '') + '</h3>';
+            } else if (/^- /.test(line)) {
+                if (!inList) { html += '<ul>'; inList = true; }
+                html += '<li>' + line.replace(/^- /, '') + '</li>';
+            } else {
+                if (inList) { html += '</ul>'; inList = false; }
+                html += '<p>' + line + '</p>';
+            }
+        }
+        if (inList) html += '</ul>';
+        return html;
     }
-
     /* ==================== LIVE DATA ==================== */
     function timeAgo(dateStr) {
         var diffMin = Math.floor((Date.now() - new Date(dateStr).getTime()) / 60000);