feat(driver-pwa): design tokens, entry, test setup

Co-Authored-By: claude-flow <ruv@ruv.net>

driver-pwa/frontend/src/App.tsx

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+export default function App() {
+  return <div className="p-4">Премиум Водитель</div>;
+}

driver-pwa/frontend/src/index.css

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+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+html, body, #root { height: 100%; }
+body { @apply bg-cream text-ink font-sans antialiased; margin: 0; }
+button { font-family: inherit; }
+
+@layer components {
+  .btn-primary { @apply bg-ink text-cream rounded-xl2 py-3.5 px-4 text-sm font-bold text-center w-full active:opacity-90 disabled:opacity-50; }
+  .btn-ghost { @apply border border-ink text-ink rounded-xl2 py-3 px-4 text-sm font-semibold text-center w-full; }
+  .card { @apply bg-surface border border-line rounded-2xl; }
+}

driver-pwa/frontend/src/main.tsx

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+import React from "react";
+import ReactDOM from "react-dom/client";
+import { BrowserRouter } from "react-router-dom";
+import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
+import { Toaster } from "sonner";
+import App from "./App";
+import "./index.css";
+
+const queryClient = new QueryClient({
+  defaultOptions: { queries: { retry: 1, staleTime: 15_000 } },
+});
+
+ReactDOM.createRoot(document.getElementById("root")!).render(
+  <React.StrictMode>
+    <QueryClientProvider client={queryClient}>
+      <BrowserRouter>
+        <App />
+        <Toaster richColors position="top-center" />
+      </BrowserRouter>
+    </QueryClientProvider>
+  </React.StrictMode>
+);

driver-pwa/frontend/src/test/setup.ts

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+import "@testing-library/jest-dom/vitest";