Artboard Tool creates new artboard instead of moving existing one on infinite canvas (causes background disappearance)

[Lokesh0224]

When working on an infinite canvas, using the Artboard Tool creates a new artboard instead of simply moving the existing one.
This causes the background of the infinite canvas to disappear, while the shapes previously drawn remain visible.
Essentially, it seems to create a new canvas, removing the original infinite canvas background.
I did not see any specific error message in the console, so it appears the background layer might be getting replaced or hidden rather than the node graph failing completely.

Screencast.from.2025-10-30.10-44-29.webm

Steps to Reproduce

1. Open a new document with the infinite canvas option.
2. Draw one or more shapes (e.g., a rectangle).
3. Switch to the Artboard Tool.
4. Try to click and drag to move the artboard or create a new one.

Observed result:

• A new artboard is created instead of moving the existing one.
• The background disappears, leaving only the drawn shapes visible.

Expected result:

• The existing artboard should be moved.
• No new artboard should be created.
• The background should remain visible and the graph valid.