Problem

The Manager UI allows modifying attributes of assets that belong to linked Gateways.

However, the backend rejects these changes. When users try to save, they get a generic "Failed to save asset" snackbar message.

This creates a confusing UX because the UI suggests the action is allowed, while the backend silently prevents it.

Current behavior

• User can click "Modify" and change attributes
• On save, request fails
• Snackbar shows: "Failed to save asset"
• Backend logs:

04/02/2026 15:41:10 	INFO 	ASSET 		Cannot directly add or modify a descendant asset on a gateway asset, do this on the gateway itself: Gateway ID=5QTaMlUSfjO0pC8TuZSECx 	
04/02/2026 15:32:31 	INFO 	ASSET 		Cannot directly add or modify a descendant asset on a gateway asset, do this on the gateway itself: Gateway ID=5QTaMlUSfjO0pC8TuZSECx

Expected behavior

Users should not be able to modify these assets from the Manager UI.

Proposed solution

Disable the "Modify" button for assets that are descendants of a linked Gateway.

Optionally:

• Show a tooltip explaining: "This asset is managed via its gateway"

Steps to reproduce

1. Open Manager UI
2. Navigate to an asset under a linked Gateway
3. Click "Modify"
4. Change any attribute
5. Click "Save"
6. Observe failure snackbar

Impact

• Confusing UX
• Wasted user effort
• No clear indication why the action is not allowed