fix(dashboard): rewrite topology graph for performance at scale

Replaced React state-driven animation with ECharts graph rendering.
Previous approach re-rendered 263+ SVG nodes via setState in rAF loop,
causing browser lockup. New approach uses ECharts which handles force
layout and rendering natively at scale.

Changes:
- Switch from D3 force sim + React state to ECharts graph
- Remove particle animation (was fake random noise, not real packets)
- Filter out nodes with zero edges by default
- Add filter controls: Connected, Infra, All
- ECharts handles zoom/pan/drag natively (roam: true)
- Node selection dims unrelated nodes
- Force config matches Meshview: repulsion 200, edgeLength [80,120]
- Animation disabled for performance (animation: false)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
zvx-echo6 2026-05-12 12:47:42 -06:00
commit 4625740057
2 changed files with 260 additions and 484 deletions

View file

@ -9,20 +9,27 @@
"preview": "vite preview"
},
"dependencies": {
"@types/d3": "^7.4.3",
"@types/leaflet": "^1.9.21",
"d3": "^7.9.0",
"echarts": "^6.0.0",
"echarts-for-react": "^3.0.6",
"leaflet": "^1.9.4",
"lucide-react": "^0.383.0",
"react": "^18.3.0",
"react-dom": "^18.3.0",
"react-leaflet": "^4.2.1",
"react-router-dom": "^6.23.0",
"recharts": "^2.12.0",
"lucide-react": "^0.383.0"
"recharts": "^2.12.0"
},
"devDependencies": {
"@types/react": "^18.3.0",
"@types/react-dom": "^18.3.0",
"@vitejs/plugin-react": "^4.3.0",
"typescript": "^5.4.0",
"vite": "^5.4.0",
"tailwindcss": "^3.4.0",
"autoprefixer": "^10.4.0",
"postcss": "^8.4.0",
"autoprefixer": "^10.4.0"
"tailwindcss": "^3.4.0",
"typescript": "^5.4.0",
"vite": "^5.4.0"
}
}

View file

@ -1,6 +1,7 @@
import { useEffect, useRef, useCallback, useState } from 'react'
import * as d3 from 'd3'
import { ZoomIn, ZoomOut, Maximize2 } from 'lucide-react'
import { useEffect, useRef, useMemo, useState, useCallback } from 'react'
import ReactECharts from 'echarts-for-react'
import type { EChartsOption } from 'echarts'
import { Filter } from 'lucide-react'
import type { NodeInfo, EdgeInfo } from '@/lib/api'
interface TopologyGraphProps {
@ -10,44 +11,34 @@ interface TopologyGraphProps {
onSelectNode: (nodeId: number | null) => void
}
interface SimNode extends d3.SimulationNodeDatum {
id: number
shortName: string
longName: string
role: string
isInfra: boolean
regionIndex: number
x?: number
y?: number
fx?: number | null
fy?: number | null
}
interface SimLink extends d3.SimulationLinkDatum<SimNode> {
source: SimNode | number
target: SimNode | number
snr: number
quality: string
}
interface Particle {
edgeIndex: number
t: number
speed: number
size: number
}
const REGION_COLORS = ['#3b82f6', '#a78bfa', '#06b6d4', '#f59e0b', '#22c55e', '#ec4899', '#8b5cf6', '#14b8a6']
const INFRA_ROLES = ['ROUTER', 'ROUTER_LATE', 'REPEATER', 'TRACKER']
function getQualityColor(snr: number): string {
if (snr > 12) return '#22c55e' // excellent - green
if (snr > 8) return '#4ade80' // good - light green
if (snr > 5) return '#f59e0b' // fair - amber
if (snr > 3) return '#f97316' // marginal - orange
return '#ef4444' // poor - red
if (snr > 12) return '#22c55e'
if (snr > 8) return '#4ade80'
if (snr > 5) return '#f59e0b'
if (snr > 3) return '#f97316'
return '#ef4444'
}
const INFRA_ROLES = ['ROUTER', 'ROUTER_LATE', 'REPEATER', 'TRACKER']
function getRegionIndex(lat: number | null): number {
if (lat === null) return 0
if (lat > 46) return 0
if (lat > 44.5) return 1
if (lat > 43) return 2
return 3
}
function getNodeSize(role: string): number {
if (role === 'ROUTER' || role === 'ROUTER_LATE') return 30
if (role === 'REPEATER' || role === 'TRACKER') return 25
if (role === 'CLIENT_MUTE') return 7
if (role === 'CLIENT_BASE') return 12
return 15 // CLIENT and others
}
type FilterMode = 'all' | 'infra' | 'connected'
export default function TopologyGraph({
nodes,
@ -55,480 +46,258 @@ export default function TopologyGraph({
selectedNodeId,
onSelectNode,
}: TopologyGraphProps) {
const svgRef = useRef<SVGSVGElement>(null)
const gRef = useRef<SVGGElement>(null)
const simulationRef = useRef<d3.Simulation<SimNode, SimLink> | null>(null)
const zoomRef = useRef<d3.ZoomBehavior<SVGSVGElement, unknown> | null>(null)
const transformRef = useRef<d3.ZoomTransform>(d3.zoomIdentity)
const particlesRef = useRef<Particle[]>([])
const animationRef = useRef<number>(0)
const dragNodeRef = useRef<SimNode | null>(null)
const chartRef = useRef<ReactECharts>(null)
const [filterMode, setFilterMode] = useState<FilterMode>('connected')
const [simNodes, setSimNodes] = useState<SimNode[]>([])
const [simLinks, setSimLinks] = useState<SimLink[]>([])
const [dimensions, setDimensions] = useState({ width: 800, height: 540 })
const [transform, setTransform] = useState<d3.ZoomTransform>(d3.zoomIdentity)
// Build region index map
const regionIndexMap = useCallback((lat: number | null) => {
if (lat === null) return 0
if (lat > 46) return 0 // Northern
if (lat > 44.5) return 1 // Central
if (lat > 43) return 2 // SW
return 3 // SC
}, [])
// Initialize zoom behavior
useEffect(() => {
if (!svgRef.current) return
const svg = d3.select(svgRef.current)
const zoom = d3.zoom<SVGSVGElement, unknown>()
.scaleExtent([0.3, 4])
.on('zoom', (event) => {
transformRef.current = event.transform
setTransform(event.transform)
})
svg.call(zoom)
zoomRef.current = zoom
// Double-click to reset zoom
svg.on('dblclick.zoom', () => {
svg.transition().duration(300).call(zoom.transform, d3.zoomIdentity)
// Build set of node IDs that have at least one edge
const connectedNodeIds = useMemo(() => {
const ids = new Set<number>()
edges.forEach((e) => {
ids.add(e.from_node)
ids.add(e.to_node)
})
return ids
}, [edges])
return () => {
svg.on('.zoom', null)
// Filter nodes based on mode
const filteredNodes = useMemo(() => {
let result = nodes
if (filterMode === 'connected') {
// Only nodes with edges (like Meshview)
result = result.filter((n) => connectedNodeIds.has(n.node_num))
} else if (filterMode === 'infra') {
// Only infrastructure nodes
result = result.filter((n) => INFRA_ROLES.includes(n.role))
}
}, [])
// Initialize simulation
useEffect(() => {
if (!nodes.length) return
return result
}, [nodes, filterMode, connectedNodeIds])
const width = dimensions.width
const height = dimensions.height
// Build node map for quick lookup
const nodeMap = useMemo(() => {
return new Map(filteredNodes.map((n) => [n.node_num, n]))
}, [filteredNodes])
// Create simulation nodes
const simNodesData: SimNode[] = nodes.map((n) => ({
id: n.node_num,
shortName: n.short_name,
longName: n.long_name,
role: n.role,
isInfra: INFRA_ROLES.includes(n.role),
regionIndex: regionIndexMap(n.latitude),
x: width / 2 + (Math.random() - 0.5) * 200,
y: height / 2 + (Math.random() - 0.5) * 200,
}))
const nodeMap = new Map(simNodesData.map((n) => [n.id, n]))
// Create simulation links
const simLinksData: SimLink[] = edges
.filter((e) => nodeMap.has(e.from_node) && nodeMap.has(e.to_node))
.map((e) => ({
source: e.from_node,
target: e.to_node,
snr: e.snr,
quality: e.quality,
}))
// FIX 1: Dynamic force scaling - compute metrics from data
const nodeCount = simNodesData.length
const edgeCount = simLinksData.length
const density = edgeCount / Math.max(nodeCount, 1)
const linkCount: Record<number, number> = {}
simLinksData.forEach((l) => {
const srcId = typeof l.source === 'object' ? l.source.id : l.source
const tgtId = typeof l.target === 'object' ? l.target.id : l.target
linkCount[srcId] = (linkCount[srcId] || 0) + 1
linkCount[tgtId] = (linkCount[tgtId] || 0) + 1
})
// Create D3 force simulation with dynamic parameters
const simulation = d3.forceSimulation<SimNode>(simNodesData)
.alphaDecay(0.008)
.velocityDecay(0.35)
.force('charge', d3.forceManyBody<SimNode>()
.strength(-Math.max(150, nodeCount * 5))
.distanceMax(Math.min(800, nodeCount * 10)))
.force('link', d3.forceLink<SimNode, SimLink>(simLinksData)
.id((d) => d.id)
.distance((d) => {
const snr = d.snr || 0
if (snr > 12) return 80
if (snr > 8) return 100
if (snr > 5) return 125
return 155
})
.strength((d) => {
const srcId = typeof d.source === 'object' ? d.source.id : d.source
const tgtId = typeof d.target === 'object' ? d.target.id : d.target
const srcDeg = linkCount[srcId] || 1
const tgtDeg = linkCount[tgtId] || 1
return 1 / Math.sqrt(Math.max(srcDeg, tgtDeg))
}))
.force('center', d3.forceCenter(width / 2, height / 2)
.strength(Math.min(0.15, 5 / Math.max(nodeCount, 1))))
.force('collide', d3.forceCollide<SimNode>((d) => d.isInfra ? 30 : 16)
.strength(Math.min(1, 20 / density)))
// Clamp positions on each tick to keep nodes in view
simulation.on('tick', () => {
simNodesData.forEach((n) => {
if (n.x !== undefined) n.x = Math.max(40, Math.min(width - 40, n.x))
if (n.y !== undefined) n.y = Math.max(40, Math.min(height - 40, n.y))
})
})
simulationRef.current = simulation
setSimNodes(simNodesData)
setSimLinks(simLinksData as SimLink[])
// Initialize particles
const particles: Particle[] = []
simLinksData.forEach((_, i) => {
const numParticles = 2 + Math.floor(Math.random() * 2)
for (let p = 0; p < numParticles; p++) {
particles.push({
edgeIndex: i,
t: Math.random(),
speed: 0.002 + Math.random() * 0.003,
size: 1.5 + Math.random() * 1.5,
})
}
})
particlesRef.current = particles
// Animation loop
let lastTime = 0
const animate = (time: number) => {
const dt = Math.min((time - lastTime) / 16.67, 2)
lastTime = time
particlesRef.current.forEach((p) => {
p.t += p.speed * dt
if (p.t > 1) p.t -= 1
})
setSimNodes([...simNodesData])
animationRef.current = requestAnimationFrame(animate)
}
animationRef.current = requestAnimationFrame(animate)
return () => {
cancelAnimationFrame(animationRef.current)
simulation.stop()
}
}, [nodes, edges, dimensions, regionIndexMap])
// Handle resize
useEffect(() => {
const handleResize = () => {
if (svgRef.current) {
const rect = svgRef.current.parentElement?.getBoundingClientRect()
if (rect) {
setDimensions({ width: rect.width, height: 540 })
}
}
}
handleResize()
window.addEventListener('resize', handleResize)
return () => window.removeEventListener('resize', handleResize)
}, [])
// Filter edges to only include those between filtered nodes
const filteredEdges = useMemo(() => {
return edges.filter((e) => nodeMap.has(e.from_node) && nodeMap.has(e.to_node))
}, [edges, nodeMap])
// Get neighbors of selected node
const selectedNeighbors = new Set<number>()
if (selectedNodeId !== null) {
edges.forEach((e) => {
if (e.from_node === selectedNodeId) selectedNeighbors.add(e.to_node)
if (e.to_node === selectedNodeId) selectedNeighbors.add(e.from_node)
const selectedNeighbors = useMemo(() => {
const neighbors = new Set<number>()
if (selectedNodeId !== null) {
filteredEdges.forEach((e) => {
if (e.from_node === selectedNodeId) neighbors.add(e.to_node)
if (e.to_node === selectedNodeId) neighbors.add(e.from_node)
})
}
return neighbors
}, [selectedNodeId, filteredEdges])
// Build ECharts data
const chartData = useMemo(() => {
const graphNodes = filteredNodes.map((n) => {
const regionIndex = getRegionIndex(n.latitude)
const color = REGION_COLORS[regionIndex % REGION_COLORS.length]
const isInfra = INFRA_ROLES.includes(n.role)
const isSelected = n.node_num === selectedNodeId
const isNeighbor = selectedNeighbors.has(n.node_num)
const isRelated = selectedNodeId === null || isSelected || isNeighbor
return {
id: String(n.node_num),
name: n.short_name,
value: n.node_num,
symbolSize: getNodeSize(n.role),
itemStyle: {
color: isInfra ? color : '#111827',
borderColor: color,
borderWidth: isInfra ? 0 : 2,
opacity: isRelated ? 1 : 0.15,
},
label: {
show: true,
position: 'bottom' as const,
distance: 5,
fontSize: 10,
fontFamily: 'JetBrains Mono, monospace',
color: isRelated ? '#94a3b8' : '#94a3b820',
},
// Store extra data for click handler
nodeNum: n.node_num,
longName: n.long_name,
role: n.role,
}
})
}
// FIX 2: Drag handlers with zoom transform
const handlePointerDown = useCallback((e: React.PointerEvent, node: SimNode) => {
e.preventDefault()
e.stopPropagation()
const svg = svgRef.current
if (!svg || !simulationRef.current) return
const graphLinks = filteredEdges.map((e) => {
const isRelated = selectedNodeId === null ||
e.from_node === selectedNodeId ||
e.to_node === selectedNodeId
svg.setPointerCapture(e.pointerId)
dragNodeRef.current = node
node.fx = node.x
node.fy = node.y
simulationRef.current.alphaTarget(0.3).restart()
}, [])
return {
source: String(e.from_node),
target: String(e.to_node),
value: e.snr,
lineStyle: {
color: getQualityColor(e.snr),
width: isRelated && selectedNodeId !== null ? 2 : 1,
opacity: selectedNodeId === null ? 0.4 : (isRelated ? 0.6 : 0.04),
},
}
})
const handlePointerMove = useCallback((e: React.PointerEvent) => {
if (!dragNodeRef.current || !svgRef.current) return
return { nodes: graphNodes, links: graphLinks }
}, [filteredNodes, filteredEdges, selectedNodeId, selectedNeighbors])
const svg = svgRef.current
const rect = svg.getBoundingClientRect()
const screenX = e.clientX - rect.left
const screenY = e.clientY - rect.top
// ECharts option
const option: EChartsOption = useMemo(() => ({
backgroundColor: '#111827',
tooltip: {
trigger: 'item',
backgroundColor: '#1e293b',
borderColor: '#334155',
textStyle: {
color: '#e2e8f0',
fontFamily: 'JetBrains Mono, monospace',
fontSize: 11,
},
// eslint-disable-next-line @typescript-eslint/no-explicit-any
formatter: (params: any) => {
if (params.data && params.data.longName) {
const d = params.data
return `<strong>${d.name}</strong><br/>${d.longName}<br/>Role: ${d.role}`
}
return ''
},
},
series: [
{
type: 'graph',
layout: 'force',
roam: true,
draggable: true,
animation: false,
data: chartData.nodes,
links: chartData.links,
force: {
repulsion: 200,
edgeLength: [80, 120],
gravity: 0.1,
},
emphasis: {
focus: 'adjacency',
blurScope: 'coordinateSystem',
lineStyle: {
width: 3,
},
},
label: {
show: true,
position: 'bottom',
distance: 5,
fontSize: 10,
fontFamily: 'JetBrains Mono, monospace',
},
edgeLabel: {
show: false,
},
// Selection styling handled via data opacity
},
],
}), [chartData])
// Convert screen coords to graph coords using current transform
const t = transformRef.current
const x = (screenX - t.x) / t.k
const y = (screenY - t.y) / t.k
dragNodeRef.current.fx = x
dragNodeRef.current.fy = y
}, [])
const handlePointerUp = useCallback((e: React.PointerEvent) => {
if (!dragNodeRef.current || !simulationRef.current) return
svgRef.current?.releasePointerCapture(e.pointerId)
dragNodeRef.current.fx = null
dragNodeRef.current.fy = null
dragNodeRef.current = null
simulationRef.current.alphaTarget(0)
}, [])
const handleNodeClick = useCallback((nodeId: number) => {
onSelectNode(selectedNodeId === nodeId ? null : nodeId)
// Handle chart events
const onChartClick = useCallback((params: { data?: { nodeNum?: number } }) => {
if (params.data && 'nodeNum' in params.data) {
const nodeNum = params.data.nodeNum
onSelectNode(selectedNodeId === nodeNum ? null : nodeNum ?? null)
}
}, [selectedNodeId, onSelectNode])
const handleBackgroundClick = useCallback(() => {
// Only deselect if clicking on background, not during drag
if (!dragNodeRef.current) {
onSelectNode(null)
const onChartEvents = useMemo(() => ({
click: onChartClick,
}), [onChartClick])
// Update chart when selection changes
useEffect(() => {
const chart = chartRef.current?.getEchartsInstance()
if (chart) {
chart.setOption(option, { notMerge: false, lazyUpdate: true })
}
}, [onSelectNode])
// Zoom control handlers
const handleZoomIn = useCallback(() => {
if (!svgRef.current || !zoomRef.current) return
const svg = d3.select(svgRef.current)
svg.transition().duration(200).call(zoomRef.current.scaleBy, 1.3)
}, [])
const handleZoomOut = useCallback(() => {
if (!svgRef.current || !zoomRef.current) return
const svg = d3.select(svgRef.current)
svg.transition().duration(200).call(zoomRef.current.scaleBy, 0.7)
}, [])
const handleZoomReset = useCallback(() => {
if (!svgRef.current || !zoomRef.current) return
const svg = d3.select(svgRef.current)
svg.transition().duration(300).call(zoomRef.current.transform, d3.zoomIdentity)
}, [])
}, [option])
return (
<div className="relative bg-bg-card rounded-lg border border-border overflow-hidden">
<svg
ref={svgRef}
width={dimensions.width}
height={dimensions.height}
className="cursor-grab active:cursor-grabbing"
onPointerMove={handlePointerMove}
onPointerUp={handlePointerUp}
onPointerLeave={handlePointerUp}
onClick={handleBackgroundClick}
>
{/* Background */}
<rect width="100%" height="100%" fill="#111827" />
<ReactECharts
ref={chartRef}
option={option}
style={{ height: '540px', width: '100%' }}
onEvents={onChartEvents}
opts={{ renderer: 'canvas' }}
/>
{/* Zoomable/pannable content group */}
<g ref={gRef} transform={`translate(${transform.x},${transform.y}) scale(${transform.k})`}>
{/* Edges */}
<g>
{simLinks.map((link, i) => {
const source = typeof link.source === 'object' ? link.source : simNodes.find(n => n.id === link.source)
const target = typeof link.target === 'object' ? link.target : simNodes.find(n => n.id === link.target)
if (!source?.x || !source?.y || !target?.x || !target?.y) return null
{/* Filter controls */}
<div className="absolute top-4 left-4 flex items-center gap-2 bg-bg-card/90 backdrop-blur-sm border border-border rounded px-3 py-2">
<Filter size={14} className="text-slate-500" />
<div className="flex gap-1">
{([
{ key: 'connected', label: 'Connected' },
{ key: 'infra', label: 'Infra' },
{ key: 'all', label: 'All' },
] as { key: FilterMode; label: string }[]).map(({ key, label }) => (
<button
key={key}
onClick={() => setFilterMode(key)}
className={`px-2 py-1 text-xs rounded transition-colors ${
filterMode === key
? 'bg-accent text-white'
: 'bg-bg-hover text-slate-400 hover:text-slate-200'
}`}
>
{label}
</button>
))}
</div>
<span className="text-xs text-slate-500 ml-2">
{filteredNodes.length} nodes {filteredEdges.length} edges
</span>
</div>
const isRelated = selectedNodeId === null ||
source.id === selectedNodeId ||
target.id === selectedNodeId
const opacity = selectedNodeId === null ? 0.4 : (isRelated ? 0.6 : 0.04)
const color = getQualityColor(link.snr)
const sx = source.x
const sy = source.y
const tx = target.x
const ty = target.y
return (
<g key={i}>
<line
x1={sx}
y1={sy}
x2={tx}
y2={ty}
stroke={color}
strokeWidth={isRelated && selectedNodeId !== null ? 2 : 1}
opacity={opacity}
/>
{selectedNodeId !== null && isRelated && (
<text
x={(sx + tx) / 2}
y={(sy + ty) / 2 - 4}
fill={color}
fontSize="9"
fontFamily="JetBrains Mono, monospace"
textAnchor="middle"
opacity={0.9}
>
{link.snr.toFixed(1)} dB
</text>
)}
</g>
)
})}
</g>
{/* Particles */}
<g>
{particlesRef.current.map((particle, i) => {
const link = simLinks[particle.edgeIndex]
if (!link) return null
const source = typeof link.source === 'object' ? link.source : simNodes.find(n => n.id === link.source)
const target = typeof link.target === 'object' ? link.target : simNodes.find(n => n.id === link.target)
if (!source?.x || !source?.y || !target?.x || !target?.y) return null
const isRelated = selectedNodeId === null ||
source.id === selectedNodeId ||
target.id === selectedNodeId
const sx = source.x
const sy = source.y
const tx = target.x
const ty = target.y
const x = sx + (tx - sx) * particle.t
const y = sy + (ty - sy) * particle.t
const color = getQualityColor(link.snr)
return (
<circle
key={i}
cx={x}
cy={y}
r={particle.size}
fill={color}
opacity={selectedNodeId === null ? 0.7 : (isRelated ? 0.8 : 0.05)}
/>
)
})}
</g>
{/* Nodes */}
<g>
{simNodes.map((node) => {
if (node.x === undefined || node.y === undefined) return null
const isSelected = node.id === selectedNodeId
const isNeighbor = selectedNeighbors.has(node.id)
const isRelated = selectedNodeId === null || isSelected || isNeighbor
const opacity = isRelated ? 1 : 0.1
const color = REGION_COLORS[node.regionIndex % REGION_COLORS.length]
const radius = node.isInfra ? 14 : 8
return (
<g
key={node.id}
transform={`translate(${node.x}, ${node.y})`}
opacity={opacity}
className="cursor-pointer"
onPointerDown={(e) => handlePointerDown(e, node)}
onClick={(e) => {
e.stopPropagation()
handleNodeClick(node.id)
}}
>
{isSelected && (
<circle
r={radius + 4}
fill="none"
stroke="white"
strokeWidth={2}
strokeDasharray="4 2"
opacity={0.8}
/>
)}
<circle
r={radius}
fill={node.isInfra ? color : '#111827'}
stroke={color}
strokeWidth={node.isInfra ? 0 : 2}
/>
<text
y={radius + 12}
textAnchor="middle"
fill="#94a3b8"
fontSize="10"
fontFamily="JetBrains Mono, monospace"
>
{node.shortName}
</text>
</g>
)
})}
</g>
</g>
{/* Legend - outside transform group so it stays fixed */}
<g transform={`translate(16, ${dimensions.height - 100})`}>
<rect x={-8} y={-8} width={140} height={96} fill="#0a0e17" fillOpacity={0.8} rx={4} />
<text fill="#94a3b8" fontSize="10" fontWeight="500" y={4}>Edge Quality</text>
{/* Legend */}
<div className="absolute bottom-4 left-4 bg-bg-card/90 backdrop-blur-sm border border-border rounded p-3">
<div className="text-xs text-slate-400 font-medium mb-2">Edge Quality (SNR)</div>
<div className="space-y-1">
{[
{ label: 'Excellent (>12)', color: '#22c55e' },
{ label: 'Good (8-12)', color: '#4ade80' },
{ label: 'Fair (5-8)', color: '#f59e0b' },
{ label: 'Marginal (3-5)', color: '#f97316' },
{ label: 'Poor (<3)', color: '#ef4444' },
].map((item, i) => (
<g key={item.label} transform={`translate(0, ${16 + i * 14})`}>
<line x1={0} y1={0} x2={16} y2={0} stroke={item.color} strokeWidth={2} />
<text x={22} y={3} fill="#64748b" fontSize="9">{item.label}</text>
</g>
].map((item) => (
<div key={item.label} className="flex items-center gap-2">
<div className="w-4 h-0.5" style={{ backgroundColor: item.color }} />
<span className="text-xs text-slate-500">{item.label}</span>
</div>
))}
</g>
</div>
</div>
{/* Node type legend */}
<g transform={`translate(${dimensions.width - 130}, ${dimensions.height - 50})`}>
<rect x={-8} y={-8} width={120} height={44} fill="#0a0e17" fillOpacity={0.8} rx={4} />
<g>
<circle cx={8} cy={6} r={6} fill="#3b82f6" />
<text x={20} y={9} fill="#64748b" fontSize="9">Infrastructure</text>
</g>
<g transform="translate(0, 18)">
<circle cx={8} cy={6} r={5} fill="#111827" stroke="#3b82f6" strokeWidth={1.5} />
<text x={20} y={9} fill="#64748b" fontSize="9">Client</text>
</g>
</g>
</svg>
{/* Zoom controls - outside SVG for easier styling */}
<div className="absolute bottom-4 right-4 flex flex-col gap-1">
<button
onClick={handleZoomIn}
className="w-8 h-8 bg-bg-hover/90 backdrop-blur-sm border border-border rounded flex items-center justify-center text-slate-400 hover:text-slate-200 hover:bg-bg-hover transition-colors"
title="Zoom in"
>
<ZoomIn size={16} />
</button>
<button
onClick={handleZoomOut}
className="w-8 h-8 bg-bg-hover/90 backdrop-blur-sm border border-border rounded flex items-center justify-center text-slate-400 hover:text-slate-200 hover:bg-bg-hover transition-colors"
title="Zoom out"
>
<ZoomOut size={16} />
</button>
<button
onClick={handleZoomReset}
className="w-8 h-8 bg-bg-hover/90 backdrop-blur-sm border border-border rounded flex items-center justify-center text-slate-400 hover:text-slate-200 hover:bg-bg-hover transition-colors"
title="Reset zoom"
>
<Maximize2 size={16} />
</button>
{/* Node type legend */}
<div className="absolute bottom-4 right-4 bg-bg-card/90 backdrop-blur-sm border border-border rounded p-3">
<div className="text-xs text-slate-400 font-medium mb-2">Node Type</div>
<div className="space-y-2">
<div className="flex items-center gap-2">
<div className="w-3 h-3 rounded-full bg-blue-500" />
<span className="text-xs text-slate-500">Infrastructure</span>
</div>
<div className="flex items-center gap-2">
<div className="w-3 h-3 rounded-full bg-gray-900 border-2 border-blue-500" />
<span className="text-xs text-slate-500">Client</span>
</div>
</div>
</div>
</div>
)