feat: Cameleer3 design system — complete standalone implementation

Wires up all 5 routes in App.tsx (/, /metrics, /routes/:id,
/exchanges/:id, /agents). Fixes pre-existing build errors: vite.config.ts
now uses vitest/config defineConfig so the test property is typed
correctly; removes unused imports in Collapsible.tsx and _chart-utils.ts;
removes unused parameter in metrics.ts generateTimeSeries.

Build: tsc -b && vite build passes clean. Test suite: 72/72 pass.
Bundle: 334kB JS (101kB gzip) + 54kB CSS (10kB gzip).

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

src/App.tsx

@@ -1,10 +1,18 @@
 import { Routes, Route } from 'react-router-dom'
 import { Dashboard } from './pages/Dashboard/Dashboard'
+import { Metrics } from './pages/Metrics/Metrics'
+import { RouteDetail } from './pages/RouteDetail/RouteDetail'
+import { ExchangeDetail } from './pages/ExchangeDetail/ExchangeDetail'
+import { AgentHealth } from './pages/AgentHealth/AgentHealth'
 
 export default function App() {
   return (
     <Routes>
       <Route path="/" element={<Dashboard />} />
+      <Route path="/metrics" element={<Metrics />} />
+      <Route path="/routes/:id" element={<RouteDetail />} />
+      <Route path="/exchanges/:id" element={<ExchangeDetail />} />
+      <Route path="/agents" element={<AgentHealth />} />
     </Routes>
   )
 }

src/design-system/composites/_chart-utils.ts

@@ -80,7 +80,7 @@ export function formatAxisLabel(val: number): string {
   return val.toFixed(1)
 }
 
-export function formatXLabel(val: number | Date, totalPoints: number): string {
+export function formatXLabel(val: number | Date, _totalPoints: number): string {
   if (val instanceof Date || (typeof val === 'number' && val > 1e10)) {
     const d = val instanceof Date ? val : new Date(val)
     return d.toLocaleTimeString([], { hour: '2-digit', minute: '2-digit' })

src/design-system/primitives/Collapsible/Collapsible.tsx

@@ -1,4 +1,4 @@
-import { useState, useRef, useEffect } from 'react'
+import { useState, useRef } from 'react'
 import styles from './Collapsible.module.css'
 import type { ReactNode } from 'react'
 

src/mocks/metrics.ts

@@ -25,7 +25,6 @@ function generateTimeSeries(
   baseValue: number,
   variance: number,
   points: number,
-  startHour = 6,
 ): TimeSeriesPoint[] {
   const result: TimeSeriesPoint[] = []
   const now = new Date('2026-03-18T09:15:00')