dragging and dropping to open workflows seems to be broken

### Prerequisites

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

### What happened?

[ComfyUI 0.21.1]
[ComfyUI_frontend v1.43.18]

nothing happens when I drag an image or video onto the canvas, same thing even if I drag a JSON workflow onto it. Is this a bug, or is the new version just supposed to work like this?

### Steps to Reproduce

1. any png or mp4 with metadata
2. any json workflow files
3.

### How is this affecting you?

Feature doesn't work as expected

### ComfyUI Frontend Version

1.43.18

### Browser

Chrome/Chromium

### Console Errors

```javascript
no error messages
```

### Logs

```shell
no logs
```

### Additional Context

win 11, rtx5090

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-12376-dragging-and-dropping-to-open-workflows-seems-to-be-broken-3666d73d36508197b67bffb959f24358) by [Unito](https://www.unito.io)