Update app.py

app.py

@@ -721,7 +721,7 @@ with gr.Blocks(theme=custom_theme, css=custom_css) as demo:
                 load_space_button = gr.Button("🔄 Load Existing Space", variant="secondary")
 
             with gr.Accordion("🤖 AI Model Settings", open=True):
-                provider_select = gr.Dropdown(label="AI Provider", choices=get_available_providers(), value=get_default_model_for_provider(get_available_providers()[0] if get_available_providers() else None))
+                provider_select = gr.Dropdown(label="AI Provider", choices=get_available_providers(), value=get_default_model_for_provider(get_available_providers()[0] if get_available_providers() else 'Groq'))
                 model_select = gr.Dropdown(label="AI Model", choices=[])
                 system_prompt_input = gr.Textbox(label="System Prompt", lines=10, value=DEFAULT_SYSTEM_PROMPT, elem_id="system-prompt")