fix: prevent default browser context menu from appearing on edge righ…

[Edouard-Tby]

…t-click

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[X] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

When right-clicking on an edge, the custom context menu appears but the default browser context menu also shows up, causing UI overlap and unintended behavior.

Issue Number: 346

What is the new behavior?

Right-clicking on an edge now only opens the custom context menu.
The default browser context menu is suppressed using preventDefault() in the onContextMenu handler, and event propagation is stopped to prevent interference from other scene elements.

Does this PR introduce a breaking change?

[ ] Yes
[X] No

Other information

onPointerDown fires before contextmenu, but the browser doesn’t care unless you also stop the contextmenu event.
onContextMenu directly intercepts the event that causes the browser menu.
event.preventDefault() removes the default menu, and event.stopPropagation() keeps it from triggering higher-level handlers.

[netlify]

✅ Deploy Preview for reagraph ready!

Name	Link
🔨 Latest commit	ef0ab38
🔍 Latest deploy log	https://app.netlify.com/projects/reagraph/deploys/689b934e21b8aa000820b2a2
😎 Deploy Preview	https://deploy-preview-363--reagraph.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[AntonJames-Sistence]

Looks good and works on my machine in Chrome and Safari. However, I don’t have access to a Windows environment to test it there