Fix: Append API routes instead of inserting to preserve Gradio static asset routes

app.py

@@ -505,11 +505,13 @@ with gr.Blocks(
 gradio_app.queue(max_size=8)
 
 # Add routes after Blocks context when router is definitely ready
+# Append routes instead of inserting to avoid interfering with Gradio's static asset routes
 try:
     if hasattr(gradio_app, '_api_handlers'):
         from starlette.routing import Route
         for path, handler, methods in gradio_app._api_handlers:
-            gradio_app.app.router.routes.insert(0, Route(path, handler, methods=methods))
+            # Append routes so Gradio's routes (especially /_app/*) are checked first
+            gradio_app.app.router.routes.append(Route(path, handler, methods=methods))
         print(f"FastAPI routes added after Blocks context. Total routes: {len(gradio_app.app.router.routes)}")
         # Clean up
         del gradio_app._api_handlers