Add pricing badge when a subgraph contains partner nodes (#6354)

<img width="596" height="213" alt="image"
src="https://github.com/user-attachments/assets/174c5461-f638-42de-b3ad-0e108dee3983"
/>


![api-badge-subgraph_00003](https://github.com/user-attachments/assets/067d0398-47e9-4e97-9e1d-67fac2935e55)


┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6354-Add-pricing-badge-when-a-subgraph-contains-partner-nodes-29b6d73d365081c685bec3e9446970eb)
by [Unito](https://www.unito.io)

src/core/graph/subgraph/proxyWidget.ts

@@ -1,4 +1,7 @@
-import { demoteWidget } from '@/core/graph/subgraph/proxyWidgetUtils'
+import {
+  demoteWidget,
+  promoteRecommendedWidgets
+} from '@/core/graph/subgraph/proxyWidgetUtils'
 import { parseProxyWidgets } from '@/core/schemas/proxyWidget'
 import type { NodeProperty } from '@/lib/litegraph/src/LGraphNode'
 import type {
@@ -62,6 +65,10 @@ export function registerProxyWidgets(canvas: LGraphCanvas) {
       }
     }
   })
+  canvas.canvas.addEventListener<'subgraph-converted'>(
+    'subgraph-converted',
+    (e) => promoteRecommendedWidgets(e.detail.subgraphNode)
+  )
   SubgraphNode.prototype.onConfigure = onConfigure
 }