Add database and Prisma configurations, enhance event and leaderboard components with API integration, and update navigation for session management

app/api/leaderboard/route.ts

@@ -0,0 +1,37 @@
+import { NextResponse } from "next/server";
+import { prisma } from "@/lib/prisma";
+
+export async function GET() {
+  try {
+    const users = await prisma.user.findMany({
+      orderBy: {
+        score: "desc",
+      },
+      take: 10,
+      select: {
+        id: true,
+        username: true,
+        score: true,
+        level: true,
+        avatar: true,
+      },
+    });
+
+    const leaderboard = users.map((user: { id: string; username: string; score: number; level: number; avatar: string | null }, index: number) => ({
+      rank: index + 1,
+      username: user.username,
+      score: user.score,
+      level: user.level,
+      avatar: user.avatar,
+    }));
+
+    return NextResponse.json(leaderboard);
+  } catch (error) {
+    console.error("Error fetching leaderboard:", error);
+    return NextResponse.json(
+      { error: "Erreur lors de la récupération du leaderboard" },
+      { status: 500 }
+    );
+  }
+}
+