Redesign admin UI as transit operations command center with sidebar navigation, design system, and dashboard

admin_ui/index.html

@@ -1,13 +1,20 @@
 <!doctype html>
-<html>
+<html lang="nl">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>Transit Admin</title>
+    <meta name="theme-color" content="#0e1526" />
+    <link rel="preconnect" href="https://fonts.googleapis.com" />
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+    <link
+      href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;550;600;700;800&display=swap"
+      rel="stylesheet"
+    />
+    <title>Transit Beheercentrum</title>
   </head>
   <body>
     <div id="root"></div>
     <script src="/env-config.js"></script>
     <script type="module" src="/src/main.jsx"></script>
   </body>
-</html>
+</html>