feat(web): React-фронтенд вместо Flet + fix restore rmtree на bind-mount

web-react/: SPA Vite+React+TS, nginx раздаёт статику и проксирует /api на api:8000 по локалке. docker-compose: web(Flet)->web-react на :80. transfer_crud.backup_restore: чистим содержимое data/radar вместо rmtree точки монтирования (EBUSY).

web-react/src/App.tsx

@@ -0,0 +1,38 @@
+import { BrowserRouter, Navigate, Route, Routes } from "react-router-dom";
+import { AuthProvider } from "./auth/AuthContext";
+import { ThemeProvider } from "./theme/ThemeContext";
+import { ProtectedRoute } from "./components/ProtectedRoute";
+import { LoginPage } from "./pages/LoginPage";
+import { RegisterPage } from "./pages/RegisterPage";
+import { HomePage } from "./pages/HomePage";
+import { TestListPage } from "./pages/TestListPage";
+import { PollPage } from "./pages/PollPage";
+import { MyTestsPage } from "./pages/MyTestsPage";
+import { ResponsePage } from "./pages/ResponsePage";
+import { ProfilePage } from "./pages/ProfilePage";
+
+function protect(el: React.ReactNode) {
+  return <ProtectedRoute>{el}</ProtectedRoute>;
+}
+
+export default function App() {
+  return (
+    <ThemeProvider>
+      <AuthProvider>
+        <BrowserRouter>
+          <Routes>
+            <Route path="/login" element={<LoginPage />} />
+            <Route path="/register" element={<RegisterPage />} />
+            <Route path="/" element={protect(<HomePage />)} />
+            <Route path="/tests" element={protect(<TestListPage />)} />
+            <Route path="/poll/:pollId" element={protect(<PollPage />)} />
+            <Route path="/my-tests" element={protect(<MyTestsPage />)} />
+            <Route path="/response/:responseId" element={protect(<ResponsePage />)} />
+            <Route path="/profile" element={protect(<ProfilePage />)} />
+            <Route path="*" element={<Navigate to="/" replace />} />
+          </Routes>
+        </BrowserRouter>
+      </AuthProvider>
+    </ThemeProvider>
+  );
+}