Fix root route redirect to /home

The root FastAPI app needs an explicit handler for / to redirect to
/home since Gradio multi-page apps don't handle the bare root path.

app.py

@@ -380,11 +380,18 @@ logger.info("All routes configured")
 
 # Mount the REST API on /api
 from fastapi import FastAPI
+from fastapi.responses import RedirectResponse
 from api import api_app
 
 # Create a parent FastAPI app that will host both the API and Gradio
 root_app = FastAPI()
 root_app.mount("/api", api_app)
+
+# Add redirect from / to /home (Gradio's multi-page apps need explicit routes)
+@root_app.get("/", include_in_schema=False)
+async def root_redirect():
+    return RedirectResponse(url="/home")
+
 app = gr.mount_gradio_app(root_app, demo, path="/")
 logger.info("REST API mounted at /api, Gradio app mounted at /")