Fix camel-ai NameError: define pdf_file_out and proper UI layout; wire run outputs and image preview

app.py

@@ -1628,12 +1628,27 @@ This work, developed in collaboration with [TVG@Oxford](https://torrvision.com/i
         # ========== RIGHT: OUTPUT ==========
         with gr.Column(scale=1):
             with gr.Accordion("Output", open=True):
-                logs_out     = gr.Textbox(label="🧾 Logs (8–10 minutes)", lines=30, max_lines=50)
-                pdf_out      = gr.HTML(label="📄 Poster (PDF Preview)")
-                zip_out      = gr.File(
-                    label="📦 Download Results (.zip)(select **XeLaTeX** as the Overleaf compile engine.)"
-                )                
-    run_btn.click(
+                # Preview on top
+                img_out      = gr.Image(label="🖼️ Poster (Image Preview)", interactive=False)
+                # Logs in the middle
+                logs_out     = gr.Textbox(label="🧾 Logs", lines=10, max_lines=20)
+                # Downloads at bottom
+                pdf_out      = gr.HTML(label="📄 Poster (PDF Preview)", visible=False)
+                with gr.Row():
+                    pdf_file_out = gr.File(label="📄 Download Poster (PDF)")
+                    zip_out      = gr.File(label="📦 Download Results (.zip)")
+                overleaf_out = gr.HTML(label="Open in Overleaf")
+                # Debug (hidden)
+                debug_zip_btn= gr.Button("🐞 Test repo output.zip", variant="secondary", visible=False)
+                debug_zip_out= gr.HTML(label="🐞 Real Output Preview", visible=False)
+                debug_zip_img= gr.Image(label="🐞 Real Output Image", interactive=False, visible=False)
+                debug_zip_pdfpath = gr.Textbox(visible=False)
+                debug_last_btn= gr.Button("🐞 Test last pipeline zip", variant="secondary", visible=False)
+                debug_last_out= gr.HTML(label="🐞 Last Pipeline Preview", visible=False)
+                debug_last_img= gr.Image(label="🐞 Last Output Image", interactive=False, visible=False)
+                debug_last_pdfpath = gr.Textbox(visible=False)
+
+    _run_evt = run_btn.click(
         fn=run_pipeline,
         inputs=[arxiv_in, pdf_in, key_in, inst_logo_in, conf_logo_in, theme_in],
         outputs=[logs_out, pdf_out, pdf_file_out, zip_out, overleaf_out],