Refactor app.py to include lazy loading for images

app.py

@@ -174,9 +174,8 @@ with demo:
     with gr.Row():
         with gr.Accordion("📙 Citation", open=False):
             citation_button = gr.Textbox(
-                value=CITATION_BUTTON_TEXT,
+                value=gr.Markdown("```bib\n" + CITATION_BUTTON_TEXT + "\n```"),
                 label=CITATION_BUTTON_LABEL,
-                # lines=20,
                 elem_id="citation-button",
                 show_copy_button=True,
             )