## Summary
Fixes https://github.com/Comfy-Org/ComfyUI_frontend/issues/5688 by
adding shift modifier support for multi-selecting Vue nodes, enabling
standard shift+click selection behavior alongside existing
ctrl/cmd+click.
## Changes
- **What**: Updated Vue node event handlers to include `event.shiftKey`
in multi-select logic
- **Testing**: Added browser tests for both ctrl and shift modifier
selection behaviors
## Review Focus
Multi-select behavior consistency across different input modifiers and
platform compatibility (Windows/Mac/Linux shift key handling).
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5714-fix-using-shift-modifier-to-de-select-Vue-nodes-2756d73d365081bcb5e0fe80eacdb2f0)
by [Unito](https://www.unito.io)