Handle pointercancel and scope disposal in Vue node resize

[coderabbitai]

Description

The resize implementation in useNodeResize currently sets layoutStore.isResizingVueNodes to true during resize operations and resets it in the pointerup handler. However, if the pointer sequence is interrupted (e.g., OS gesture, window blur, device-specific cancel) and pointerup never fires, the flag can remain true, permanently blocking drag activation until reload.

Tasks

• Add handling for pointercancel event to ensure cleanup happens even when pointer sequences are interrupted
• Add onScopeDispose hook to defensively reset the isResizingVueNodes flag if the component is unmounted mid-resize
• Ensure releasePointerCapture is wrapped in try-catch to handle cases where capture was already released

Context

Related PR: #7064
Original discussion: #7064 (comment)
Requested by: @christian-byrne

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