update

app.py

@@ -370,19 +370,28 @@ with gr.Blocks(head=GOOGLE_FONTS_URL, css=custom_css, theme=gr.themes.Soft()) as
                     example_url_vl = gr.State(value=None)
 
                     if targeted_recognition_examples:
-                        targeted_paths = [e[0] for e in targeted_recognition_examples]
+                        targeted_paths = [e[0] for e in targeted_recognition_examples]  # List[str]
                         targeted_state = gr.State(targeted_paths)
-                        gr.Markdown("**Element-level Recognition Examples (Click an image to load)**")
-                        gallery_targeted = gr.Gallery(value=targeted_paths, columns=4, height=400, preview=False, label=None, allow_preview=False)
 
-                        def on_gallery_select_for_vl(paths, evt):
-                            url = _on_gallery_select(paths, evt)
+                        gallery_targeted = gr.Gallery(
+                            value=targeted_paths, columns=4, height=400,
+                            preview=False, label=None, allow_preview=False
+                        )
+
+                        def on_gallery_select_for_vl(paths, evt: gr.SelectData):
+                            idx = evt.index
+                            if isinstance(idx, (list, tuple)):
+                                idx = idx[0]
+                            try:
+                                url = paths[int(idx)]
+                            except Exception:
+                                raise gr.Error(f"Invalid index from gallery: {evt.index}")
                             return url, update_preview_visibility(url)
 
                         gallery_targeted.select(
                             fn=on_gallery_select_for_vl,
                             inputs=[targeted_state],
-                            outputs=[example_url_vl, preview_vl_html]
+                            outputs=[example_url_vl, preview_vl_html],
                         )
 
                 with gr.Column(scale=7):