Add table of contents snippet and update menu config

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

site/config/menu.php

@@ -2,22 +2,13 @@
 
 return [
   'home' => [
-    'label'   => 'Soutien',
-    'icon'    => 'money',
-    'link'    => 'pages/soutien',
-    'current' => function ($current) {
-        $path = Kirby::instance()->request()->path()->toString();
-        return Str::contains($path, 'pages/soutien');
-    },
-  ],
-  'shop' => [
-    'label'   => 'Boutique',
-    'icon'    => 'cart',
-    'link'    => 'pages/boutique',
-    'current' => function ($current) {
-        $path = Kirby::instance()->request()->path()->toString();
-        return Str::contains($path, 'pages/boutique');
-    },
+    'label'   => 'Dashboard',
+    'icon'    => 'bolt',
+    'link'    => '/',
+    'current' => function (string $current): bool {
+      $path = Kirby\Cms\App::instance()->path();
+      return Str::contains($path, '/site');
+    }
   ],
   '-',
   'users'