fix: prevent block duplication when typing in input fields (#4788)

[vikas-sharma123]

This PR fixes a bug where typing inside an input field (like the “Set Pen Size” block) caused other blocks in the workspace to duplicate or glitch.

The issue happened because workspace keyboard events were still active while typing in input fields.

I’ve added a simple check in activity.js to stop keydown events from propagating when the event target is an input box.

Tested locally — the duplication no longer happens and other keyboard shortcuts still work fine.

Fixes #4788

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[harshrajsoni]

Hyy @vikas-sharma123
I tested your code but the issue still persists...

Screen.Recording.2025-11-12.085843.mp4

[vikas-sharma123]

hi @harshrajsoni it works fine on my system but thanks for the heads-up

[walterbender]

I am not able to reproduce the issue as described. Can you provide detailed instructions on reproducing the problem with the set pen size block?

[vikas-sharma123]

@walterbender Hey, here are the exact steps to see the issue:

1. Open Music Blocks (local build).
2. Go to Pen → drag “Set pen size” into the workspace.
3. Click on the input at the top of that block.
4. Type any numbers.

Before the fix, the workspace duplicates/glitches blocks when typing.
After my change, typing stays inside the input field and nothing duplicates.