refactor: migrate authentication to NextAuth and clean up related services

app/page.tsx

@@ -1,5 +1,5 @@
 import { redirect } from "next/navigation";
-import { AuthService } from "@/services";
+import { auth } from "@/auth";
 import { evaluationService, SkillsService, TeamsService } from "@/services";
 import { generateRadarData } from "@/lib/evaluation-utils";
 import {
@@ -14,12 +14,14 @@ import {
 
 export default async function HomePage() {
   // Charger les données côté serveur
-  const userUuid = await AuthService.getUserUuidFromCookie();
+  const session = await auth();
 
-  if (!userUuid) {
+  if (!session?.user) {
     redirect("/login");
   }
 
+  const userUuid = session.user.id;
+
   const [userEvaluation, skillCategories, teams] = await Promise.all([
     evaluationService.getServerUserEvaluation(userUuid!),
     SkillsService.getSkillCategories(),