update app

app.py

@@ -1429,7 +1429,8 @@ def create_demo() -> gr.Blocks:
     )
     _DEMO_THEME, _DEMO_CSS = theme, css
 
-    with gr.Blocks(title="DataChef", theme=_DEMO_THEME, css=_DEMO_CSS) as demo:
+    # Gradio 6: theme/css should be passed at launch, not Blocks constructor
+    with gr.Blocks(title="DataChef") as demo:
         with gr.Row(elem_classes=["header-container"]):
             gr.HTML(get_header_html())
             
@@ -1482,7 +1483,7 @@ def create_demo() -> gr.Blocks:
                     headers=["HuggingFace Dataset ID"],
                     datatype=["str"],
                     row_count=(1, "dynamic"),
-                    col_count=(1, "fixed"),
+                    column_count=(1, "fixed"),
                     value=default_dataset_rows,
                     interactive=True,
                     label=None,
@@ -1532,7 +1533,7 @@ def create_demo() -> gr.Blocks:
                         run_code_btn = gr.Button("▶️ Run Code", variant="secondary", size="sm")
                         run_output = gr.Code(
                             value="",
-                            language="text",
+                            language="plaintext",
                             label=None,
                             interactive=False,
                             lines=16,