feat: routes page — deep-link to specific route, sport-colour tiles over real map, sort filter (distance/completions/last-completed), group custom vs auto-detected, taller map tiles

frontend/src/App.jsx

@@ -37,6 +37,7 @@ export default function App() {
         <Route path="summary" element={<SummaryPage />} />
         <Route path="health" element={<HealthPage />} />
         <Route path="routes" element={<RoutesPage />} />
+        <Route path="routes/:routeId" element={<RoutesPage />} />
         <Route path="records" element={<RecordsPage />} />
         <Route path="upload" element={<UploadPage />} />
         <Route path="profile" element={<ProfilePage />} />