Interrupt run disapeared

### Prerequisites

- [x] I am running the latest version of ComfyUI
- [x] I have searched existing issues to make sure this isn't a duplicate
- [x] I have tested with all custom nodes disabled ([see how](https://docs.comfy.org/troubleshooting/custom-node-issues#step-1%3A-test-with-all-custom-nodes-disabled))

### What happened?

I don't know if this normal, but doesn't seems right.
Also the "missing node indicator" is still here on the run button even if no nodes are really missing.

### Steps to Reproduce

Install last frontend version (1.33.5)

### How is this affecting you?

Visual/UI issue only

### ComfyUI Frontend Version

1.33.5

### Browser

Chrome/Chromium

### Console Errors

```javascript

```

### Logs

```shell

```

### Additional Context

_No response_

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-6827-Interrupt-run-disapeared-2b36d73d365081c1bf57dc086de62d9b) by [Unito](https://www.unito.io)

Start by reproducing the visual issue in ComfyUI_frontend 1.33.5 using Chrome or Chromium, with custom nodes disabled, and compare the run button with the attached screenshot. Investigate why the interrupt control disappears and why the missing-node indicator remains when no nodes are missing. Done means both indicators accurately reflect the current workflow state.

Written by the indexing model from the issue text.