Upload server/main.py with huggingface_hub

server/main.py

@@ -238,11 +238,10 @@ the <strong>Live LLM War Room</strong> (Theme #1) on the same page.</p>
 """
 
 
-@app.get("/", response_class=PlainTextResponse)
-async def root():
-    """Landing page. Judges land here → see the big 'Launch demo' button."""
+@app.get("/landing", response_class=HTMLResponse)
+async def landing_page():
+    """Former landing page, now moved to /landing."""
     from fastapi.responses import HTMLResponse
-
     return HTMLResponse(_LANDING_HTML)
 
 
@@ -421,7 +420,11 @@ async def get_logs():
     """Returns the captured application logs for troubleshooting."""
     return {"logs": log_stream.getvalue()}
 
-# ─── Mount the Gradio visual demo at /demo ──────────────────────────────────
+# ─── Mount the Gradio visual demo at / ──────────────────────────────────────
+#
+# By mounting at / instead of /demo, the main Space URL on the Hugging Face Hub
+# will load the Gradio UI directly, which is the best experience for judges.
+# API routes (/health, /reset, /step) defined above still take precedence.
 
 try:
     import gradio as gr
@@ -430,15 +433,15 @@ try:
     logger.info("Building Gradio demo UI...")
     _demo = build_demo()
     
-    # Mount the Gradio app to the FastAPI app
-    app = gr.mount_gradio_app(app, _demo, path="/demo")
-    logger.info("Gradio demo UI mounted at /demo")
+    # Mount the Gradio app at the root /
+    app = gr.mount_gradio_app(app, _demo, path="/")
+    logger.info("Gradio demo UI mounted at /")
     
+    @app.get("/demo")
     @app.get("/launch")
-    @app.get("/demo-redirect")
     async def demo_redirect():
         from fastapi.responses import RedirectResponse
-        return RedirectResponse(url="/demo")
+        return RedirectResponse(url="/")
 
 except Exception as _demo_exc:
     logger.error("Failed to mount Gradio demo UI: %s", _demo_exc, exc_info=True)