fix

frontend/src/components/PDFGenerator.js

@@ -20,9 +20,20 @@ class PDFGenerator {
     }
 
     async addSchedule(element) {
-        const originalFontSize = element.style.fontSize;
-        element.style.fontSize = '12pt';
-        const canvas = await html2canvas(element, { scale: 2 });
+        const canvas = await html2canvas(element, {
+            scale: 2,
+            onclone: (clonedDoc) => {
+              // Klon des Wurzel-Elements
+              const tbl = clonedDoc.getElementById(element.id);
+              if (!tbl) return;
+        
+              // Alle Zellen und Überschriften-Elemente auswählen
+              const cells = tbl.querySelectorAll('td, th');
+              cells.forEach(cell => {
+                cell.style.fontSize = '12pt';
+              });
+            }
+          });
         const imgData = canvas.toDataURL('image/png');
         const imgWidth = 210 - this.margin * 2;
         const imgHeight = (canvas.height * imgWidth) / canvas.width;