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>
   )
 }