Fix Gradio runtime error by moving theme to gr.Blocks

app.py

@@ -101,7 +101,7 @@ def run_llm_training(
 
 # ── Gradio UI ─────────────────────────────────────────────────────────────────
 
-with gr.Blocks(title="Cloud Arena RL") as demo:
+with gr.Blocks(title="Cloud Arena RL", theme=gr.themes.Base()) as demo:
     gr.Markdown("# ☁️ Cloud Arena — RL Training Space")
     gr.Markdown("Two separate RL systems: **Mathematical Model** (MaskablePPO) and **LLM Model** (LLaMA + LoRA)")
 
@@ -153,4 +153,4 @@ with gr.Blocks(title="Cloud Arena RL") as demo:
         )
 
 if __name__ == "__main__":
-    demo.launch(server_name="0.0.0.0", server_port=7860, theme=gr.themes.Base())
+    demo.launch(server_name="0.0.0.0", server_port=7860)