auto complete extention all broked at frontend1.47.10

### Prerequisites

- [x] I am running the latest version of ComfyUI
- [x] I have custom nodes enabled

### What happened?

The autocomplete extension works when editing multiline text inputs inside an opened subgraph and also works for standalone multiline text nodes on the main canvas. However, it does not work for multiline text inputs that are displayed on a Subgraph node (i.e., the node that represents the subgraph on the main canvas).
I tried many autocomplete extensions, they all won't work.

### Steps to Reproduce

1.Create a subgraph that contains a multiline text input node (or a node that exposes a multiline text field).
2.Try to edit the multiline text input that is shown on the Subgraph node (without opening the subgraph).
3.Observe that the autocomplete extension does not trigger or provide suggestions in this context, while it works inside the opened subgraph and for standalone multiline text nodes.

### How is this affecting you?

Visual/UI issue only

### ComfyUI Frontend Version

1.47.10~1.47.11

### Browser

Edge

### Console Errors

```javascript

```

### Logs

```shell

```

### Additional Context

_No response_

Start by reproducing the issue with a multiline text input exposed on a Subgraph node, then compare it with the same input inside the opened subgraph and with a standalone multiline text node. Trace the autocomplete behavior in these three contexts; done means suggestions trigger consistently on the Subgraph node as they do in the working cases.

Written by the indexing model from the issue text.