feat: add device registry, DeviceNode, ConnectionEdge for React Flow

Creates the React Flow building blocks for the network diagram editor:
device type registry with icon/color mappings, DeviceNode component with
status indicators and connection handles, ConnectionEdge with per-type
styling, and nodeTypes/edgeTypes registration maps.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/components/network/edges/ConnectionEdge.tsx

@@ -0,0 +1,54 @@
+import { memo } from 'react'
+import { SmoothStepEdge, EdgeLabelRenderer, type EdgeProps } from '@xyflow/react'
+
+interface ConnectionEdgeData {
+  connectionType?: string
+  speed?: string | null
+  notes?: string | null
+  [key: string]: unknown
+}
+
+const CONNECTION_STYLES: Record<string, { stroke: string; strokeDasharray?: string; strokeWidth: number }> = {
+  ethernet: { stroke: '#60a5fa', strokeWidth: 2 },
+  fiber: { stroke: '#34d399', strokeWidth: 3 },
+  wifi: { stroke: '#a78bfa', strokeDasharray: '3,3', strokeWidth: 2 },
+  vpn: { stroke: '#eab308', strokeDasharray: '8,4', strokeWidth: 2 },
+  vlan: { stroke: '#848b9b', strokeWidth: 2 },
+  wan: { stroke: '#f87171', strokeDasharray: '12,4', strokeWidth: 2 },
+}
+
+const DEFAULT_STYLE = { stroke: '#848b9b', strokeWidth: 2 }
+
+function ConnectionEdgeComponent(props: EdgeProps) {
+  const edgeData = props.data as ConnectionEdgeData | undefined
+  const connectionType = edgeData?.connectionType || 'ethernet'
+  const style = CONNECTION_STYLES[connectionType] || DEFAULT_STYLE
+
+  return (
+    <>
+      <SmoothStepEdge
+        {...props}
+        style={{
+          ...style,
+          ...(props.selected ? { stroke: '#60a5fa', strokeWidth: style.strokeWidth + 1 } : {}),
+        }}
+      />
+      {props.label && (
+        <EdgeLabelRenderer>
+          <div
+            className="nodrag nopan rounded bg-page px-1.5 py-0.5 text-[10px] text-muted-foreground"
+            style={{
+              position: 'absolute',
+              transform: `translate(-50%, -50%) translate(${(props.sourceX + props.targetX) / 2}px, ${(props.sourceY + props.targetY) / 2}px)`,
+              pointerEvents: 'all',
+            }}
+          >
+            {props.label}
+          </div>
+        </EdgeLabelRenderer>
+      )}
+    </>
+  )
+}
+
+export const ConnectionEdge = memo(ConnectionEdgeComponent)

frontend/src/components/network/edges/edgeTypes.ts

@@ -0,0 +1,5 @@
+import { ConnectionEdge } from './ConnectionEdge'
+
+export const edgeTypes = {
+  connection: ConnectionEdge,
+}

frontend/src/components/network/nodes/DeviceNode.tsx

@@ -0,0 +1,51 @@
+import { memo } from 'react'
+import { Handle, Position, type NodeProps } from '@xyflow/react'
+import { cn } from '@/lib/utils'
+import { getDeviceRenderConfig } from './deviceRegistry'
+import type { DeviceProperties } from '@/types'
+
+export interface DeviceNodeData {
+  label: string
+  deviceType: string
+  category?: string
+  properties: DeviceProperties
+  [key: string]: unknown
+}
+
+const STATUS_COLORS: Record<string, string> = {
+  online: 'bg-emerald-400',
+  offline: 'bg-red-400',
+  degraded: 'bg-yellow-400',
+  unknown: 'bg-gray-500',
+}
+
+function DeviceNodeComponent({ data, selected }: NodeProps) {
+  const nodeData = data as unknown as DeviceNodeData
+  const { icon: Icon, color } = getDeviceRenderConfig(nodeData.deviceType, nodeData.category)
+  const status = nodeData.properties?.status || 'unknown'
+  const ip = nodeData.properties?.ip
+
+  return (
+    <div
+      className={cn(
+        'relative flex min-w-[120px] flex-col items-center gap-1 rounded-lg border bg-card px-4 py-3',
+        'border-default transition-colors',
+        'group',
+        selected && 'border-accent',
+      )}
+    >
+      <div className={cn('absolute right-2 top-2 h-2 w-2 rounded-full', STATUS_COLORS[status])} />
+      <Icon size={28} style={{ color }} />
+      <span className="text-center text-xs font-medium text-heading">{nodeData.label}</span>
+      {ip && (
+        <span className="font-mono text-[10px] text-muted-foreground">{ip}</span>
+      )}
+      <Handle type="target" position={Position.Top} className="!h-2 !w-2 !border-default !bg-elevated opacity-0 group-hover:opacity-100 transition-opacity" />
+      <Handle type="source" position={Position.Bottom} className="!h-2 !w-2 !border-default !bg-elevated opacity-0 group-hover:opacity-100 transition-opacity" />
+      <Handle type="target" position={Position.Left} id="left" className="!h-2 !w-2 !border-default !bg-elevated opacity-0 group-hover:opacity-100 transition-opacity" />
+      <Handle type="source" position={Position.Right} id="right" className="!h-2 !w-2 !border-default !bg-elevated opacity-0 group-hover:opacity-100 transition-opacity" />
+    </div>
+  )
+}
+
+export const DeviceNode = memo(DeviceNodeComponent)

frontend/src/components/network/nodes/deviceRegistry.ts

@@ -0,0 +1,73 @@
+import type { LucideIcon } from 'lucide-react'
+import {
+  Network, Layers, Shield, Wifi, Server, Monitor, Box, Cloud,
+  Printer, Smartphone, HardDrive, Scale, Database, CloudCog,
+  Cpu, Tablet, Laptop, BatteryCharging, LayoutGrid, RectangleVertical,
+  Cable, Camera, KeyRound,
+} from 'lucide-react'
+
+export interface DeviceRenderConfig {
+  icon: LucideIcon
+  color: string
+}
+
+const SYSTEM_DEVICE_ICONS: Record<string, DeviceRenderConfig> = {
+  'router': { icon: Network, color: 'var(--color-accent)' },
+  'switch': { icon: Layers, color: 'var(--color-text-muted-foreground)' },
+  'firewall': { icon: Shield, color: 'var(--color-accent)' },
+  'access-point': { icon: Wifi, color: 'var(--color-text-muted-foreground)' },
+  'load-balancer': { icon: Scale, color: 'var(--color-text-muted-foreground)' },
+  'server': { icon: Server, color: 'var(--color-text-muted-foreground)' },
+  'workstation': { icon: Monitor, color: 'var(--color-text-muted-foreground)' },
+  'vm': { icon: Box, color: 'var(--color-text-muted-foreground)' },
+  'container': { icon: Cpu, color: 'var(--color-text-muted-foreground)' },
+  'nas': { icon: Database, color: 'var(--color-text-muted-foreground)' },
+  'san': { icon: HardDrive, color: 'var(--color-text-muted-foreground)' },
+  'cloud-storage': { icon: CloudCog, color: 'var(--color-text-muted-foreground)' },
+  'cloud': { icon: Cloud, color: 'var(--color-text-muted-foreground)' },
+  'aws': { icon: Cloud, color: 'var(--color-text-muted-foreground)' },
+  'azure': { icon: Cloud, color: 'var(--color-text-muted-foreground)' },
+  'gcp': { icon: Cloud, color: 'var(--color-text-muted-foreground)' },
+  'printer': { icon: Printer, color: 'var(--color-text-muted-foreground)' },
+  'phone': { icon: Smartphone, color: 'var(--color-text-muted-foreground)' },
+  'iot': { icon: HardDrive, color: 'var(--color-text-muted-foreground)' },
+  'camera': { icon: Camera, color: 'var(--color-text-muted-foreground)' },
+  'tablet': { icon: Tablet, color: 'var(--color-text-muted-foreground)' },
+  'laptop': { icon: Laptop, color: 'var(--color-text-muted-foreground)' },
+  'ups': { icon: BatteryCharging, color: 'var(--color-text-muted-foreground)' },
+  'pdu': { icon: LayoutGrid, color: 'var(--color-text-muted-foreground)' },
+  'rack': { icon: RectangleVertical, color: 'var(--color-text-muted-foreground)' },
+  'patch-panel': { icon: Cable, color: 'var(--color-text-muted-foreground)' },
+  'nvr': { icon: Camera, color: 'var(--color-text-muted-foreground)' },
+  'badge-reader': { icon: KeyRound, color: 'var(--color-text-muted-foreground)' },
+}
+
+const CATEGORY_DEFAULTS: Record<string, DeviceRenderConfig> = {
+  'network': { icon: Network, color: 'var(--color-text-muted-foreground)' },
+  'compute': { icon: Server, color: 'var(--color-text-muted-foreground)' },
+  'storage': { icon: Database, color: 'var(--color-text-muted-foreground)' },
+  'cloud': { icon: Cloud, color: 'var(--color-text-muted-foreground)' },
+  'endpoint': { icon: Monitor, color: 'var(--color-text-muted-foreground)' },
+  'infrastructure': { icon: LayoutGrid, color: 'var(--color-text-muted-foreground)' },
+  'security': { icon: Shield, color: 'var(--color-text-muted-foreground)' },
+}
+
+const FALLBACK: DeviceRenderConfig = { icon: Box, color: 'var(--color-text-muted-foreground)' }
+
+export function getDeviceRenderConfig(slug: string, category?: string): DeviceRenderConfig {
+  if (SYSTEM_DEVICE_ICONS[slug]) return SYSTEM_DEVICE_ICONS[slug]
+  if (category && CATEGORY_DEFAULTS[category]) return CATEGORY_DEFAULTS[category]
+  return FALLBACK
+}
+
+export const CATEGORY_LABELS: Record<string, string> = {
+  'network': 'Network',
+  'compute': 'Compute',
+  'storage': 'Storage',
+  'cloud': 'Cloud',
+  'endpoint': 'Endpoints',
+  'infrastructure': 'Infrastructure',
+  'security': 'Security',
+}
+
+export const CATEGORY_ORDER = ['network', 'compute', 'storage', 'cloud', 'endpoint', 'infrastructure', 'security']

frontend/src/components/network/nodes/nodeTypes.ts

@@ -0,0 +1,5 @@
+import { DeviceNode } from './DeviceNode'
+
+export const nodeTypes = {
+  device: DeviceNode,
+}