feat(renderer): wire App.tsx shell with theme provider and top-bar

src/renderer/main.tsx

@@ -1,10 +1,13 @@
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import App from './App';
+import { ThemeProvider } from './components/theme-provider';
 import './styles/globals.css';
 
 ReactDOM.createRoot(document.getElementById('root')!).render(
   <React.StrictMode>
-    <App />
+    <ThemeProvider defaultTheme="dark" attribute="class" enableSystem>
+      <App />
+    </ThemeProvider>
   </React.StrictMode>
-);
+);