Include FastAPI backend router and reorder routes ahead of catchall

app.py

@@ -60,12 +60,14 @@ with gr.Blocks(title="🌾 CropAI Agronomic Cloud") as demo:
     * **Drone VRA:** Autonomous Spot-Spraying Lawnmower Grid Generator
     """)
 
-# Attach all FastAPI backend routes to the FRONT of Gradio's router
-# This ensures REST API endpoints (/api/v1/..., /health, /docs) take precedence
-# over Gradio's catch-all SPA route, while the root '/' serves the Gradio UI.
-backend_routes = [r for r in backend_app.routes]
-gradio_routes = [r for r in demo.app.router.routes if getattr(r, 'path', '') not in {getattr(br, 'path', '') for br in backend_routes}]
-demo.app.router.routes = backend_routes + gradio_routes
+# Attach all FastAPI backend routes onto Gradio's internal FastAPI app
+demo.app.include_router(backend_app.router)
+
+# Move Gradio's catch-all SPA routes to the very end so that REST API endpoints
+# (/api/v1/..., /health, /docs) take full precedence without interference.
+non_catchall = [r for r in demo.app.router.routes if '{path:path}' not in getattr(r, 'path', '')]
+catchall = [r for r in demo.app.router.routes if '{path:path}' in getattr(r, 'path', '')]
+demo.app.router.routes = non_catchall + catchall
 
 if __name__ == "__main__":
     demo.launch(ssr_mode=False)