Update app.py

app.py

@@ -364,7 +364,8 @@ def create_and_link_pdfs(source_pdf="TestSource.pdf", target_pdf="TestTarget.pdf
             writer.add_page(page)
         page = writer.pages[0]
         y_position = 800 - (7 * 20)
-        writer.add_bookmark("Seven Bookmark", 0, [50, y_position])
+        # Use add_outline_item instead of add_bookmark
+        writer.add_outline_item("Seven Bookmark", 0, dest=page, fit="/XYZ", left=50, top=y_position)
         with open(pdf_file, "wb") as f:
             writer.write(f)
 
@@ -513,7 +514,6 @@ with st.sidebar:
             mime="audio/mpeg"
         )
     
-    # Existing "Create Linked PDFs" button
     if st.button("📑 Create Linked PDFs"):
         with st.spinner("Creating and linking PDFs..."):
             source_pdf, target_pdf = create_and_link_pdfs()
@@ -527,12 +527,10 @@ with st.sidebar:
                         mime="application/pdf"
                     )
     
-    # New "Test PDFs" button
     if st.button("🧪 Test PDFs"):
         with st.spinner("Generating and testing PDFs..."):
             source_pdf, target_pdf = create_and_link_pdfs()
             st.success(f"Generated {source_pdf} and {target_pdf}")
-            # Display PDFs as images
             for pdf_file in [source_pdf, target_pdf]:
                 with open(pdf_file, "rb") as f:
                     pdf_bytes = f.read()
@@ -541,7 +539,6 @@ with st.sidebar:
                     st.subheader(f"Preview of {pdf_file}")
                     for img in images:
                         st.image(img, caption=f"{pdf_file} Page", use_container_width=True)
-                # Provide download option
                 with open(pdf_file, "rb") as f:
                     st.download_button(
                         label=f"💾 Download {pdf_file}",