Update app.py

app.py

@@ -247,7 +247,7 @@ with gr.Blocks(css=custom_css, title="Entrenador LLM Ultimate") as demo:
     with gr.Row():
         with gr.Column(scale=1):
             hf_token_input = gr.Textbox(label="HuggingFace Token", type="password", placeholder="hf_...", value=os.getenv("HF_TOKEN", ""))
-            model_input = gr.Textbox(label="Modelo Base", value="", placeholder="Ej: Qwen/Qwen2.5-0.5B")
+            model_input = gr.Textbox(label="Modelo Base", value="", placeholder="Ej: Qwen/Qwen2.5-0.5B (Requerido)")
             repo_input = gr.Textbox(label="Nombre Nuevo Repo", value="multi-dataset-model-v1")
         
         with gr.Column(scale=1):