Fix: page break insertion functionality in Multi Tool (#2350)

Fix page break insertion functionality

- Page Break insertion functionality now successfully inserts page breaks upon request

src/main/resources/static/js/multitool/PdfContainer.js

@@ -165,43 +165,14 @@ class PdfContainer {
 
 
   async addFilesBlank(nextSiblingElement) {
-    const pdfContent = `
+    let doc = await PDFLib.PDFDocument.create();
-      %PDF-1.4
+    let docBytes = await doc.save();
-      1 0 obj
+
-      << /Type /Catalog /Pages 2 0 R >>
+    const url = URL.createObjectURL(new Blob([docBytes], { type: 'application/pdf' }));
-      endobj
+
-      2 0 obj
+    const renderer = await this.toRenderer(url);
-      << /Type /Pages /Kids [3 0 R] /Count 1 >>
+
-      endobj
+    await this.addPdfFile(renderer, doc, nextSiblingElement);
-      3 0 obj
-      << /Type /Page /Parent 2 0 R /MediaBox [0 0 595 842] /Contents 5 0 R >>
-      endobj
-      5 0 obj
-      << /Length 44 >>
-      stream
-      0 0 0 595 0 842 re
-      W
-      n
-      endstream
-      endobj
-      xref
-      0 6
-      0000000000 65535 f
-      0000000010 00000 n
-      0000000071 00000 n
-      0000000121 00000 n
-      0000000205 00000 n
-      0000000400 00000 n
-      trailer
-      << /Size 6 /Root 1 0 R >>
-      startxref
-      278
-      %%EOF
-    `;
-    const blob = new Blob([pdfContent], { type: 'application/pdf' });
-    const url = URL.createObjectURL(blob);
-    const file = new File([blob], "blank_page.pdf", { type: "application/pdf" });
-    await this.addPdfFile(file, nextSiblingElement);
   }