Initial commit: backend scaffold, auth, frontend login

- FastAPI + SQLAlchemy async + Alembic + Postgres backend
- Auth: JWT access + rotating refresh tokens, argon2, roles, audit log
- React 19 + Vite frontend: login page, protected route, auth context
- Docker Compose: postgres, redis, migrate, api, worker (placeholder), frontend/nginx

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

frontend/src/app/routes.tsx

@@ -0,0 +1,19 @@
+import { Navigate, Route, Routes } from 'react-router-dom'
+
+import { LoginPage } from '@/features/auth/LoginPage'
+import { ProtectedRoute } from '@/features/auth/ProtectedRoute'
+import { DashboardPage } from '@/pages/DashboardPage'
+
+export function AppRoutes() {
+  return (
+    <Routes>
+      <Route path="/login" element={<LoginPage />} />
+
+      <Route element={<ProtectedRoute />}>
+        <Route path="/" element={<DashboardPage />} />
+      </Route>
+
+      <Route path="*" element={<Navigate to="/" replace />} />
+    </Routes>
+  )
+}