Refactor AdminPage and remove AdminPanel component: Simplify admin navigation by redirecting to preferences page and eliminating the AdminPanel component, streamlining the admin interface.

app/admin/preferences/page.tsx

@@ -0,0 +1,30 @@
+import { sitePreferencesService } from "@/services/preferences/site-preferences.service";
+import BackgroundPreferences from "@/components/admin/BackgroundPreferences";
+import EventPointsPreferences from "@/components/admin/EventPointsPreferences";
+import EventFeedbackPointsPreferences from "@/components/admin/EventFeedbackPointsPreferences";
+import HousePointsPreferences from "@/components/admin/HousePointsPreferences";
+import { Card } from "@/components/ui";
+
+export const dynamic = "force-dynamic";
+
+export default async function AdminPreferencesPage() {
+  const sitePreferences =
+    await sitePreferencesService.getOrCreateSitePreferences();
+
+  return (
+    <Card variant="dark" className="p-4 sm:p-6">
+      <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-6">
+        <h2 className="text-xl sm:text-2xl font-gaming font-bold text-pixel-gold break-words">
+          Préférences UI Globales
+        </h2>
+      </div>
+      <div className="space-y-4">
+        <BackgroundPreferences initialPreferences={sitePreferences} />
+        <EventPointsPreferences initialPreferences={sitePreferences} />
+        <EventFeedbackPointsPreferences initialPreferences={sitePreferences} />
+        <HousePointsPreferences initialPreferences={sitePreferences} />
+      </div>
+    </Card>
+  );
+}
+