Add house leaderboard feature: Integrate house leaderboard functionality in LeaderboardPage and LeaderboardSection components. Update userStatsService to fetch house leaderboard data, and enhance UI to display house rankings, scores, and member details. Update Prisma schema to include house-related models and relationships, and seed database with initial house data.

app/leaderboard/page.tsx

@@ -7,8 +7,9 @@ export const dynamic = "force-dynamic";
 
 export default async function LeaderboardPage() {
   // Paralléliser les appels DB
-  const [leaderboard, backgroundImage] = await Promise.all([
+  const [leaderboard, houseLeaderboard, backgroundImage] = await Promise.all([
     userStatsService.getLeaderboard(10),
+    userStatsService.getHouseLeaderboard(10),
     getBackgroundImage("leaderboard", "/leaderboard-bg.jpg"),
   ]);
 
@@ -17,6 +18,7 @@ export default async function LeaderboardPage() {
       <NavigationWrapper />
       <LeaderboardSection
         leaderboard={leaderboard}
+        houseLeaderboard={houseLeaderboard}
         backgroundImage={backgroundImage}
       />
     </main>