[Feature Request] Use Mask Editor on mobile (no stylus)

### Prerequisites

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

### What happened?

Issue:
When using the LoadImage node and attempting to edit a mask on mobile: The image only pans around. There is no way (I can find) to draw a mask using touch only. I saw the PR about adding Android support for masking when using a stylus, but that doesn't apply to this issue [#7216](https://github.com/Comfy-Org/ComfyUI_frontend/pull/7216)

Expected behavior:
1 finger touch to draw, 2 finger touch to pan/zoom.

Attempted Solutions:
I've tried using both Chrome and Firefox on mobile.
Only solution on mobile is to VNC into a desktop machine and draw using VNC mouse, not very practical.

### Steps to Reproduce

1. Instantiate a LoadImage node
2. Load an image from file
3. Select the "Edit or mask image" half moon button
4. Swipe on the image to try to draw a mask line
5. Image pans instead of draws

### How is this affecting you?

Feature doesn't work as expected

### ComfyUI Frontend Version

1.43.18

### Browser

Firefox

### Console Errors

```javascript

```

### Logs

```shell

```

### Additional Context

OS: GrapheneOS (Android 16)
Browser: Firefox 150.0.3
Phone: Pixel Fold 1

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-12315-Unable-to-use-Mask-Editor-on-mobile-no-stylus-3646d73d365081f09136d7af06050756) by [Unito](https://www.unito.io)

Start by reproducing the issue in a LoadImage node, open the “Edit or mask image” control, and test one-finger drawing versus two-finger pan/zoom on mobile Firefox. Trace the mask editor’s touch behavior from that entry point; done means touch-only users can draw masks while two-finger gestures still pan and zoom without breaking existing stylus or desktop behavior.

Written by the indexing model from the issue text.