Add full AARS system - Attendance & Accident Record System

- FastAPI backend with SQLite database
- React + TailwindCSS frontend
- JWT authentication
- Excel upload/download for attendance and accident records
- Shift roster management with S7a/S7b split
- Lateness/OT calculation based on shift times
- Roster info API endpoints
- Export API with token query parameter support
- Docker compose deployment

frontend/src/main.jsx

@@ -0,0 +1,18 @@
+import React from 'react'
+import ReactDOM from 'react-dom/client'
+import App from './App.jsx'
+import './index.css'
+import { BrowserRouter } from 'react-router-dom'
+import { Toaster } from 'react-hot-toast'
+import { AuthProvider } from './context/AuthContext.jsx'
+
+ReactDOM.createRoot(document.getElementById('root')).render(
+  <React.StrictMode>
+    <BrowserRouter>
+      <AuthProvider>
+        <App />
+        <Toaster position="bottom-right" />
+      </AuthProvider>
+    </BrowserRouter>
+  </React.StrictMode>,
+)