revert ssr_mode=False (Gradio 5.x Space edge routes via SSR; forcing off broke routing)

app.py

@@ -606,7 +606,4 @@ with gr.Blocks(
     )
 
 if __name__ == "__main__":
-    # ssr_mode=False: Gradio 5.x defaults SSR on, but the experimental SSR (Node) layer
-    # was returning intermittent 500s / truncated responses on the Space ("Too little data
-    # for declared Content-Length") while the Python process stayed up. Disable it for stability.
-    demo.launch(ssr_mode=False)
+    demo.launch()