PDF-Export: Autotable-Plugin zuverlaessig laden vor der Generierung

loadPdfLibraries() hat im "bereits ladend"-Zweig aufgeloest, sobald jsPDF
vorhanden war — das Autotable-Plugin (zweites Script) war dann aber noch
nicht angehaengt, sodass doc.autoTable undefined war und die Generierung
mit "doc.autoTable is not a function" fehlschlug. Die Polling-Bedingung
prueft jetzt auch jsPDF.API.autoTable, und generatePDF wartet zusaetzlich
auf loadPdfLibraries(), bevor das Dokument gebaut wird.

Co-Authored-By: Claude <noreply@anthropic.com>

public/js/main.js

@@ -212,11 +212,17 @@ function generatePDF(event) {
         url += params.join('&') + '&';
     }
 
+    // loadPdfLibraries() is awaited here too (not only when the modal opens) so
+    // the autotable plugin is guaranteed to be attached before we build the doc.
+    // Without this, opening the modal and submitting before the plugin script
+    // finished loading would reach generatePdfDocument() with doc.autoTable
+    // still undefined ("doc.autoTable is not a function").
     Promise.all([
+        loadPdfLibraries(),
         fetch('/api/settings').then(res => res.json()),
         fetch(url).then(res => res.json())
     ])
-    .then(([settings, applications]) => {
+    .then(([_loaded, settings, applications]) => {
         generatePdfDocument(settings, applications, month, year);
         hideModal(pdfExportModal);
     })
@@ -603,7 +609,12 @@ function loadPdfLibraries() {
         // Check if already loading
         if (document.getElementById('jspdf-script')) {
             const checkLoaded = setInterval(() => {
-                if (window.jspdf && window.jspdf.jsPDF) {
+                // Wait for the autotable plugin too, not just jsPDF: jsPDF loads
+                // first (script1), the plugin second (script2). Resolving the
+                // moment jsPDF exists leaves doc.autoTable undefined if script2
+                // has not run yet.
+                if (window.jspdf && window.jspdf.jsPDF
+                    && typeof window.jspdf.jsPDF.API.autoTable === 'function') {
                     clearInterval(checkLoaded);
                     pdfLibrariesLoaded = true;
                     resolve();