feat: Add genre validation with 404 for inactive genres and filter genre list to active ones.

app/[genre]/page.tsx

@@ -2,6 +2,7 @@ import Game from '@/components/Game';
 import { getOrCreateDailyPuzzle } from '@/lib/dailyPuzzle';
 import Link from 'next/link';
 import { PrismaClient } from '@prisma/client';
+import { notFound } from 'next/navigation';
 
 export const dynamic = 'force-dynamic';
 
@@ -14,8 +15,21 @@ interface PageProps {
 export default async function GenrePage({ params }: PageProps) {
     const { genre } = await params;
     const decodedGenre = decodeURIComponent(genre);
+
+    // Check if genre exists and is active
+    const currentGenre = await prisma.genre.findUnique({
+        where: { name: decodedGenre }
+    });
+
+    if (!currentGenre || !currentGenre.active) {
+        notFound();
+    }
+
     const dailyPuzzle = await getOrCreateDailyPuzzle(decodedGenre);
-    const genres = await prisma.genre.findMany({ orderBy: { name: 'asc' } });
+    const genres = await prisma.genre.findMany({
+        where: { active: true },
+        orderBy: { name: 'asc' }
+    });
     const specials = await prisma.special.findMany({ orderBy: { name: 'asc' } });
 
     const now = new Date();