Update app.py

app.py

@@ -237,16 +237,14 @@ def generate_pdf_report(original_img: Image.Image, mask: np.ndarray, overlay: Im
         pdf.set_font("helvetica", "I", 10)
         pdf.cell(text="This report was generated by DR Analysis System", new_x="LMARGIN", new_y="NEXT", align='C')
         
-        # Get PDF as bytes
-        pdf_bytes = pdf.output(dest='S').encode('latin1')
+        # Get PDF as bytes - updated for fpdf2>=2.7.6
+        pdf_bytes = pdf.output()  # Returns bytes directly in newer versions
         return pdf_bytes
     
     except Exception as e:
         st.error(f"PDF generation failed: {str(e)}")
         return None
 
-
-
 # ====================== MAIN APP ======================
 def main():
     st.set_page_config(layout="wide")