Restore hiding of linked inputs in app mode (#9671)

As a temporary fix for widgets being incorrectly hidden, #9669 allowed
all disabled widgets to be displayed.

This PR provides a more robust implementation to derive whether the
widget, as would be displayed from the root graph, is disabled.

Potential regression:
- Drag drop handlers are applied on node, not widgets. A subgraph
containing a "Load Image" node, does not allow dragging and dropping an
image onto the subgraphNode in order to load it. Because app mode
widgets would display from the original owning node prior to this PR,
these drag/drop handlers would apply. Placing "Load Image" nodes. I
believe this change makes behavior more consistent, but it warrants
consideration.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9671-Restore-hiding-of-linked-inputs-in-app-mode-31e6d73d365081688e37fbb931f3af68)
by [Unito](https://www.unito.io)

src/utils/litegraphUtil.ts

@@ -1,5 +1,6 @@
 import _ from 'es-toolkit/compat'
 
+import { isPromotedWidgetView } from '@/core/graph/subgraph/promotedWidgetTypes'
 import type { ColorOption, LGraph } from '@/lib/litegraph/src/litegraph'
 import type { ExecutedWsMessage } from '@/schemas/apiSchema'
 import {
@@ -319,6 +320,31 @@ export function resolveNode(
   }
   return undefined
 }
+export function resolveNodeWidget(
+  nodeId: NodeId,
+  widgetName?: string,
+  graph: LGraph = app.rootGraph
+): [LGraphNode, IBaseWidget] | [LGraphNode] | [] {
+  const node = graph.getNodeById(nodeId)
+  if (!widgetName) return node ? [node] : []
+  if (node) {
+    const widget = node.widgets?.find((w) => w.name === widgetName)
+    return widget ? [node, widget] : []
+  }
+
+  for (const node of graph.nodes) {
+    if (!node.isSubgraphNode()) continue
+    const widget = node.widgets?.find(
+      (w) =>
+        isPromotedWidgetView(w) &&
+        w.sourceWidgetName === widgetName &&
+        w.sourceNodeId === nodeId
+    )
+    if (widget) return [node, widget]
+  }
+
+  return []
+}
 
 export function isLoad3dNode(node: LGraphNode) {
   return (