Christian Byrne e119383072 feat: select group children on click (#9149) ...

## Summary

Add a setting to select all children (nodes, reroutes, nested groups)
when clicking a group on the canvas.

## Changes

- **What**: New `LiteGraph.Group.SelectChildrenOnClick` boolean setting
(default: `false`). When enabled, selecting a group cascades `select()`
to all its `_children`, and deselecting cascades `deselect()`. Recursion
handles nested groups naturally. No double-move risk — the drag handler
already uses `skipChildren=true`. The setting is wired via `onChange` to
`canvas.groupSelectChildren`, keeping litegraph free of platform
imports.

## Review Focus

- The select/deselect cascading in `LGraphCanvas.select()` /
`deselect()` — verify no infinite recursion risk with deeply nested
groups.
- The `groupSelectChildren` property is set via the setting's `onChange`
callback on `LGraphCanvas.active_canvas` — confirm this covers canvas
re-creation scenarios.

## Screenshots (if applicable)

N/A — behavioral change behind a setting toggle.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9149-feat-select-group-children-on-click-3116d73d365081a1a7b8c82dea95b242)
by [Unito](https://www.unito.io)

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Co-authored-by: GitHub Action <action@github.com>

2026-03-13 06:13:18 -07:00

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