Follow-up to #78:
- Use primaryIp() so href targets the first IP when data.ip is comma-separated (e.g. "192.168.1.1, 2001:db8::1")
- Add primaryIp() helper to maskIp.ts
- Add 4 tests covering single IP link, absent IP, multi-IP href, multi-IP display text
- Add lasso/box selection via selectionOnDrag (Space to pan, lasso by default)
- Add lasso/pan toggle button in canvas controls (bottom-left)
- Multi-select panel in right panel when 2+ nodes selected (including zones)
- Create named Group node from selected nodes with bounding box math
- Group node: resizable, inline rename, show/hide border toggle, status summary
- GroupDetailPanel: lists members, online/offline count, ungroup action
- Fix group persistence after save/reload (extend proxmox container map to include group nodes)
- Fix groupRect serialization to preserve parent_id
- Remove background color from group and proxmox container node wrappers
- Add tests for all new store actions, GroupNode, MultiSelectPanel, GroupDetailPanel
- Add 'Delete' to deleteKeyCode so both Backspace and Delete remove nodes
- Call snapshotHistory() in onBeforeDelete (keyboard) and in DetailPanel
handleDelete (button) so deletions can be undone with Ctrl+Z
Pouzor