Fix SVG generation in PDF by using temp files for svg2rlg

app.py

@@ -78,15 +78,21 @@ def generate_all_reactions_pdf():
                 rxn = AllChem.ReactionFromSmarts(reaction_smiles)
                 if rxn:
                     svg_content = Draw.ReactionToImage(rxn, useSVG=True)
+                    # Save SVG to temp file
+                    svg_temp = tempfile.NamedTemporaryFile(delete=False, suffix='.svg')
+                    svg_temp.write(svg_content.encode('utf-8'))
+                    svg_temp.close()
                     # Convert SVG to ReportLab drawing
-                    drawing = svg2rlg(io.StringIO(svg_content))
+                    drawing = svg2rlg(svg_temp.name)
                     if drawing:
                         # Scale the drawing to fit
                         drawing.width = 400
-                        drawing.height = 200
-                        drawing.scale(0.5, 0.5)
+                        drawing.height = 150
+                        drawing.scale(0.8, 0.8)
                         story.append(drawing)
                         story.append(Spacer(1, 12))
+                    # Clean up temp file
+                    os.unlink(svg_temp.name)
         except Exception as e:
             # If SVG generation fails, just continue
             pass