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 { MantineProvider } from "@mantine/core";
import "@mantine/core/styles.css";
import "@edr/ui-common/styles.css";
import "../index.css";
import "@edr/ui-common/theme.css";

import { Toaster } from "react-hot-toast";

import App from "./App";
import { ErrorBoundary } from "./components/ErrorBoundary";
import { AuthProvider } from "./auth/AuthProvider";
import { queryClient } from "./lib/queryClient";
import { freightMantineTheme } from "./theme/freight-brand";
import { 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");
}

createRoot(rootElement).render(
  <QueryClientProvider client={queryClient}>
    <MantineProvider theme={freightMantineTheme}>
      <StrictMode>
        <BrowserRouter>
          <AuthProvider>
            <ErrorBoundary>
              <App />
            </ErrorBoundary>
            <Toaster position="top-right" />
          </AuthProvider>
        </BrowserRouter>
      </StrictMode>
    </MantineProvider>
  </QueryClientProvider>
);