feat: add Logs route and nav item

frontend/src/App.tsx

@@ -6,6 +6,7 @@ import { DashboardPage } from './pages/DashboardPage';
 import { SettingsPage } from './pages/SettingsPage';
 import { GetStartedPage } from './pages/GetStartedPage';
 import { AgentsPage } from './pages/AgentsPage';
+import { LogsPage } from './pages/LogsPage';
 import { CommandPalette } from './components/CommandPalette';
 import { SetupScreen } from './components/SetupScreen';
 import { useAppStore } from './lib/store';
@@ -134,6 +135,7 @@ export default function App() {
           <Route path="settings" element={<SettingsPage />} />
           <Route path="get-started" element={<GetStartedPage />} />
           <Route path="agents" element={<AgentsPage />} />
+          <Route path="logs" element={<LogsPage />} />
         </Route>
       </Routes>
       {commandPaletteOpen && <CommandPalette />}

frontend/src/components/Sidebar/Sidebar.tsx

@@ -15,6 +15,7 @@ import {
   Moon,
   Monitor,
   Loader2,
+  ScrollText,
 } from 'lucide-react';
 import { ConversationList } from './ConversationList';
 import { useAppStore } from '../../lib/store';
@@ -47,6 +48,7 @@ export function Sidebar() {
     { path: '/', icon: MessageSquare, label: 'Chat' },
     { path: '/dashboard', icon: BarChart3, label: 'Dashboard' },
     { path: '/agents', icon: Bot, label: 'Agents' },
+    { path: '/logs', icon: ScrollText, label: 'Logs' },
     { path: '/settings', icon: Settings, label: 'Settings' },
     { path: '/get-started', icon: Rocket, label: 'Get Started' },
   ];