Add support for growable inputs (#6830)

![autogrow-optional_00002](https://github.com/user-attachments/assets/79bfe703-23d7-45fb-86ce-88baa9eaf582)

Also fixes connections to widget inputs created by a dynamic combo
breaking on reload.

Performs some refactoring to group the prior dynamic inputs code.

See also, the overarching frontend PR: comfyanonymous/ComfyUI#10832

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6830-Add-support-for-growable-inputs-2b36d73d365081c484ebc251a10aa6dd)
by [Unito](https://www.unito.io)

src/services/litegraphService.ts

@@ -7,6 +7,7 @@ import { useNodeCanvasImagePreview } from '@/composables/node/useNodeCanvasImage
 import { useNodeImage, useNodeVideo } from '@/composables/node/useNodeImage'
 import { addWidgetPromotionOptions } from '@/core/graph/subgraph/proxyWidgetUtils'
 import { showSubgraphNodeDialog } from '@/core/graph/subgraph/useSubgraphNodeDialog'
+import { applyDynamicInputs } from '@/core/graph/widgets/dynamicWidgets'
 import { st, t } from '@/i18n'
 import {
   LGraphCanvas,
@@ -93,7 +94,11 @@ export const useLitegraphService = () => {
     const widgetConstructor = widgetStore.widgets.get(
       inputSpec.widgetType ?? inputSpec.type
     )
-    if (widgetConstructor && !inputSpec.forceInput) return
+    if (
+      (widgetConstructor && !inputSpec.forceInput) ||
+      applyDynamicInputs(node, inputSpec)
+    )
+      return
 
     const input = node.addInput(inputName, inputSpec.type, {
       shape: inputSpec.isOptional ? RenderShape.HollowCircle : undefined,