feat: Add Backtest route to App

frontend/src/App.tsx

@@ -3,6 +3,7 @@ import Dashboard from './pages/Dashboard'
 import TradeHistory from './pages/TradeHistory'
 import MCPStatus from './pages/MCPStatus'
 import StrategySettings from './pages/StrategySettings'
+import Backtest from './pages/Backtest'
 import Layout from './components/Layout'
 
 function App() {
@@ -13,6 +14,7 @@ function App() {
                 <Route path="/trades" element={<TradeHistory />} />
                 <Route path="/mcp" element={<MCPStatus />} />
                 <Route path="/strategy" element={<StrategySettings />} />
+                <Route path="/backtest" element={<Backtest />} />
             </Routes>
         </Layout>
     )