fix: "convert to subgraph" not shown in context menu if subgraph inside the selection context (#7470)

Fixes https://github.com/Comfy-Org/ComfyUI_frontend/issues/7453.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7470-fix-convert-to-subgraph-not-shown-in-context-menu-if-subgraph-inside-the-selection-con-2c96d73d36508146a475e8d39c64183c)
by [Unito](https://www.unito.io)

src/composables/graph/useMoreOptionsMenu.ts

@@ -177,7 +177,12 @@ export function useMoreOptionsMenu() {
     }
 
     // Section 5: Subgraph operations
-    options.push(...getSubgraphOptions(hasSubgraphsSelected))
+    options.push(
+      ...getSubgraphOptions({
+        hasSubgraphs: hasSubgraphsSelected,
+        hasMultipleSelection: hasMultipleNodes.value
+      })
+    )
 
     // Section 6: Multiple nodes operations
     if (hasMultipleNodes.value) {