ui: add note between downloads and Overleaf about compiling ZIP with XeLaTeX

app.py

@@ -4400,6 +4400,7 @@ This work, developed in collaboration with [TVG@Oxford](https://torrvision.com/i
                 with gr.Row():
                     pdf_file_out = gr.File(label="📄 Download Poster (PDF)", interactive=False, visible=True)
                     zip_out      = gr.File(label="📦 Download Results (.zip)", interactive=False, visible=True)
+                gr.Markdown("The ZIP can be uploaded to Overleaf and compiled with XeLaTeX.")
                 overleaf_out = gr.HTML(label="Open in Overleaf")
                 # Debug (hidden)
                 debug_zip_btn= gr.Button("🐞 Test repo output.zip", variant="secondary", visible=False)