Context menu fix:
- Group nodes pass pointer events through to children in React Flow, so
right-clicking a group fires onPaneContextMenu instead of onNodeContextMenu
- handlePaneContextMenu now checks for selected nodes and shows the node
context menu (with align/group options) when any nodes are selected
Properties panel multi-select:
- Add Group section with type dropdown (Subnet, VLAN, Site, DMZ, Custom)
- "Group into [Type]" button creates a group of the chosen type
- Ungroup button appears when a group node is in the selection
- useDiagramCommands.groupSelection now accepts a groupType param and
uses it as the label and color key for the new group node
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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