feat(#22): Driver profile page

Implemented by claude via .agents/dev dispatch.

frontend/src/router.tsx

@@ -6,11 +6,16 @@ import { DataLibraryPage } from './pages/DataLibraryPage'
 import { LiveTimingPage } from './pages/LiveTimingPage'
 import { BriefingPage } from './pages/BriefingPage'
 import { ChampionshipPage } from './pages/ChampionshipPage'
+import { DriverProfilePage } from './pages/DriverProfilePage'
 
 type RaceHubSearch = {
   session_key?: number
 }
 
+type DriverProfileSearch = {
+  year?: number
+}
+
 const rootRoute = createRootRoute({
   component: () => (
     <>
@@ -64,6 +69,20 @@ export const championshipRoute = createRoute({
   component: ChampionshipPage,
 })
 
+export const driverProfileRoute = createRoute({
+  getParentRoute: () => rootRoute,
+  path: '/drivers/$driverNumber',
+  validateSearch: (search: Record<string, unknown>): DriverProfileSearch => {
+    const year = Number(search.year)
+    return Number.isFinite(year) && year > 0 ? { year } : {}
+  },
+  component: function DriverProfileRoute() {
+    const { driverNumber } = driverProfileRoute.useParams()
+    const { year } = driverProfileRoute.useSearch()
+    return <DriverProfilePage driverNumber={Number(driverNumber) || 0} year={year} />
+  },
+})
+
 export const briefingRoute = createRoute({
   getParentRoute: () => rootRoute,
   path: '/briefing',
@@ -77,6 +96,7 @@ const routeTree = rootRoute.addChildren([
   dataLibraryRoute,
   liveTimingRoute,
   championshipRoute,
+  driverProfileRoute,
   briefingRoute,
 ])