Fix subgraph conversion of primitives (#6606)

![AnimateDiff_00001](https://github.com/user-attachments/assets/a40db1c7-5f0e-43b2-a7fc-a324188a3930)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6606-Fix-subgraph-conversion-of-primitives-2a36d73d3650818e9e74dd383a7f9007)
by [Unito](https://www.unito.io)

src/extensions/core/widgetInputs.ts

@@ -168,16 +168,14 @@ export class PrimitiveNode extends LGraphNode {
 
   #onFirstConnection(recreating?: boolean) {
     // First connection can fire before the graph is ready on initial load so random things can be missing
-    if (!this.outputs[0].links) {
+    if (!this.outputs[0].links || !this.graph) {
       this.onLastDisconnect()
       return
     }
     const linkId = this.outputs[0].links[0]
-    // @ts-expect-error fixme ts strict error
     const link = this.graph.links[linkId]
     if (!link) return
 
-    // @ts-expect-error fixme ts strict error
     const theirNode = this.graph.getNodeById(link.target_id)
     if (!theirNode || !theirNode.inputs) return
 

src/lib/litegraph/src/LGraph.ts

@@ -1566,6 +1566,8 @@ export class LGraph
 
     const subgraph = this.createSubgraph(data)
     subgraph.configure(data)
+    for (const node of subgraph.nodes) node.onGraphConfigured?.()
+    for (const node of subgraph.nodes) node.onAfterGraphConfigured?.()
 
     // Position the subgraph input nodes
     subgraph.inputNode.arrange()