updated PDF report metadata

S2FApp/app.py

@@ -171,6 +171,7 @@ def _heatmap_to_png_bytes(scaled_heatmap, colormap_name="Jet"):
 
 def _create_pdf_report(img, scaled_heatmap, pixel_sum, force, force_scale, base_name, colormap_name="Jet"):
     """Create a PDF report with input image, heatmap, and metrics."""
+    from datetime import datetime
     from reportlab.lib.pagesizes import A4
     from reportlab.lib.units import inch
     from reportlab.pdfgen import canvas
@@ -178,9 +179,21 @@ def _create_pdf_report(img, scaled_heatmap, pixel_sum, force, force_scale, base_
 
     buf = io.BytesIO()
     c = canvas.Canvas(buf, pagesize=A4)
+    c.setTitle("Shape2Force")
+    c.setAuthor("Angione-Lab")
     w, h = A4
     img_w, img_h = 2.5 * inch, 2.5 * inch
 
+    # Footer area (reserve space at bottom)
+    footer_y = 40
+    c.setFont("Helvetica", 8)
+    c.setFillColorRGB(0.4, 0.4, 0.4)
+    gen_date = datetime.now().strftime("%Y-%m-%d %H:%M")
+    c.drawString(72, footer_y, f"Generated by Shape2Force (S2F) on {gen_date}")
+    c.drawString(72, footer_y - 12, "Model: https://huggingface.co/Angione-Lab/Shape2Force")
+    c.drawString(72, footer_y - 24, "Web app: https://huggingface.co/spaces/Angione-Lab/Shape2force")
+    c.setFillColorRGB(0, 0, 0)
+
     # Images first (drawn lower so title can go on top)
     img_top = h - 70
     img_pil = Image.fromarray(img) if img.ndim == 2 else Image.fromarray(cv2.cvtColor(img, cv2.COLOR_BGR2RGB))