Update app.py

app.py

@@ -776,8 +776,10 @@ with gr.Blocks(title="Engine Part CV System v5") as demo:
                 rst_btn = gr.Button("💥 Reset ALL", variant="stop")
                 rst_st  = gr.Textbox(label="Reset Status", lines=2)
 
-        ref_btn.click(update_library_preview, [], [lib_txt, lib_roi])
-        del_btn.click(delete_class_ui, [del_cls], [del_st, lib_txt, lib_roi])
+        ref_btn.click(update_library_preview, [], [lib_txt, lib_roi],
+                      api_name="list_classes")
+        del_btn.click(delete_class_ui, [del_cls], [del_st, lib_txt, lib_roi],
+                      api_name="delete_class")
         rst_btn.click(reset_all_ui, [], [rst_st, lib_txt, lib_roi])
         demo.load(update_library_preview, [], [lib_txt, lib_roi])
 
@@ -786,6 +788,6 @@ if __name__ == "__main__":
     demo.launch(
         share      = False,
         show_error = True,
-        theme      = gr.themes.Soft(),   # ← Gradio 6.0 fix: moved from Blocks()
+        theme      = gr.themes.Soft(),   
         css        = custom_css,
     )