Replace CRA boilerplate with custom dashboard setup, remove unused files, and add new styles and components.

src/App.js

@@ -1,23 +1,31 @@
-import logo from './logo.svg';
-import './App.css';
+import React, { useState } from 'react';
+import './styles/globals.css';
+import { Sidebar, Header } from './components/Layout';
+import { DashboardCards } from './components/Dashboard';
+import RequestTable from './components/Requests/RequestTable';
+import RequestForm from './components/Requests/RequestForm';
 
 function App() {
+  const [isMobileMenuOpen, setIsMobileMenuOpen] = useState(false);
+
+  const handleToggleMobileMenu = () => setIsMobileMenuOpen(!isMobileMenuOpen);
+
   return (
-    <div className="App">
-      <header className="App-header">
-        <img src={logo} className="App-logo" alt="logo" />
-        <p>
-          Edit <code>src/App.js</code> and save to reload.
-        </p>
-        <a
-          className="App-link"
-          href="https://reactjs.org"
-          target="_blank"
-          rel="noopener noreferrer"
-        >
-          Learn React
-        </a>
-      </header>
+    <div className="container">
+      <Sidebar 
+        isMobileMenuOpen={isMobileMenuOpen} 
+        onToggleMobileMenu={handleToggleMobileMenu}
+      />
+      <main className="main-content">
+        <Header />
+        <section className="content-wrapper">
+          <DashboardCards />
+          <div className="content-grid">
+            <RequestForm />
+            <RequestTable />
+          </div>
+        </section>
+      </main>
     </div>
   );
 }