Browser with 80% zoom and window width >= 3000px causes manager layout to break.

### Prerequisites

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

### What happened?

Having the page loaded in browser with 80% zoom and the window width 3000px or larger causes the manager to break.

if I minimise the window to 2999px

Tried on Firefox and Edge with same result

### Steps to Reproduce

1. Open browser to ComfyUI
2. maximize window
3. lower page zoom with Ctrl + - until it breaks.

### How is this affecting you?

Visual/UI issue only

### ComfyUI Frontend Version

1.47.11

### Browser

Firefox

### Console Errors

```javascript
N/A
```

### Logs

```shell

```

### Additional Context

_No response_

Reproduce in ComfyUI with browser zoom at 80%, then adjust the window width around 3000px and inspect the manager layout in the frontend. The issue names no component or test; identify the layout entry point before tracing the breakpoint behavior. Done means the manager layout remains usable at and above 3000px, including across Firefox and Edge.

Written by the indexing model from the issue text.