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App.tsx

@@ -393,13 +393,16 @@ const App: React.FC = () => {
             const newPdf = await PDFDocument.create();
             const { width, height } = originalPdf.getPage(0).getSize();
             
-            // Corrected imposition logic to create the print-ready page sequence.
+            // Imposition logic to create the print-ready page sequence for booklet printing.
             const reorderedPages: (number | 'BLANK')[] = [];
-            let low = 0;
-            let high = paddedPageCount - 1;
-            while(low < high) {
-                reorderedPages.push(finalSequence[high--]); // e.g., Page 8
-                reorderedPages.push(finalSequence[low++]);  // e.g., Page 1
+            const n = paddedPageCount;
+            if (n > 0) {
+                for (let i = 0; i < n / 2; i += 2) {
+                    reorderedPages.push(finalSequence[n - 1 - i]);
+                    reorderedPages.push(finalSequence[i]);
+                    reorderedPages.push(finalSequence[i + 1]);
+                    reorderedPages.push(finalSequence[n - 2 - i]);
+                }
             }
             
             setProgress(40);
@@ -642,4 +645,4 @@ const App: React.FC = () => {
     );
 };
 
-export default App;
+export default App;