edr-platform/apps/edr-freight-web/backoffice/src/main.tsx

import { StrictMode } from "react";
import { createRoot } from "react-dom/client";
import { BrowserRouter } from "react-router-dom";
import "@edr/ui-common/styles.css";
import "../index.css";
import "@edr/ui-common/theme.css";

import App from "./App";
import { AuthProvider } from "./auth/AuthProvider";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";

const THEME_STORAGE_KEY = "edr-theme";

const applyStoredTheme = () => {
  const storedTheme = window.localStorage.getItem(THEME_STORAGE_KEY);
  const prefersDark = window.matchMedia?.("(prefers-color-scheme: dark)").matches;
  const theme = storedTheme === "dark" || storedTheme === "light"
    ? storedTheme
    : prefersDark
      ? "dark"
      : "light";

  if (theme === "dark") {
    document.documentElement.classList.add("dark");
    return;
  }

  document.documentElement.classList.remove("dark");
};

applyStoredTheme();

const rootElement = document.getElementById("root");

if (!rootElement) {
  throw new Error("Root element not found");
}

const queryClient = new QueryClient();

createRoot(rootElement).render(
  <QueryClientProvider client={queryClient}>

  <StrictMode>
    <BrowserRouter>
      <AuthProvider>
        <App />
      </AuthProvider>
    </BrowserRouter>
  </StrictMode>,
  </QueryClientProvider>
);