The native <input type="color"> only supports 6-digit hex, stripping alpha
and forcing background/border/text colors to be fully opaque on edit.
Each color field now shows an opacity slider (0–100%) below the swatch.
Values are stored as 8-digit hex (#rrggbbaa). Existing zones with 6-digit
colors are handled transparently (alpha defaults to 100%).
- colorUtils.ts: hexToRgba / rgbaToHex8 helpers
- GroupRectModal: opacity sliders for all three color fields
- 26 new tests across colorUtils and GroupRectModal
- Label position toggle: inside (default) or outside the border
- Outside mode renders the label above/below the zone based on text_position
- Text size selector: 10/12/14/16/18/20px (default 12)
- Both fields persisted in custom_colors (no backend schema change needed)
- 8 new frontend tests, 1 new backend test
- Rename "Rectangle" → "Zone" in sidebar, add modal and edit modal
- Add border width selector (1–5px, default 2px) to the Zone modal
- Border width persisted in custom_colors.border_width and applied in GroupRectNode
- Fix DockerNode default icon: use Anchor instead of Package
- Add border_style option to Group Rectangle (solid/dashed/dotted/double/none)
- Group node type selector by category (Hardware, Virtualization, IoT, Generic)
- Add tests for border style feature
- Add groupRect entry to NODE_DEFAULT_COLORS (required by Record<NodeType, NodeColors>)
- Explicitly type Select onValueChange callbacks as (v: string) to satisfy
stricter type inference in tsc -b build mode
- New GroupRectNode: rounded rect with NodeResizer (8 handles), no
connection handles, always behind network nodes via negative zIndex
- GroupRectModal: label, font preset (Inter/Mono/Serif), 3×3 text
position grid, text/border/background color pickers, z-order 1–9
- Sidebar: "Add Rectangle" button (below Add Node), group rects
excluded from node count stats
- Save/load: size persisted in custom_colors.width/height, no backend
schema changes required
- elevateNodesOnSelect=false on ReactFlow so selected rects never
pop above network nodes
- Tests: 3 new store tests + 9 GroupRectModal tests (66 total, all pass)