Finalize scoring system, release year integration, and fix song deletion

app/api/songs/route.ts

@@ -29,6 +29,7 @@ export async function GET() {
         filename: song.filename,
         createdAt: song.createdAt,
         coverImage: song.coverImage,
+        releaseYear: song.releaseYear,
         activations: song.puzzles.length,
         puzzles: song.puzzles,
         genres: song.genres,
@@ -179,12 +180,25 @@ export async function POST(request: Request) {
             console.error('Failed to extract cover image:', e);
         }
 
+        // Fetch release year from MusicBrainz
+        let releaseYear = null;
+        try {
+            const { getReleaseYear } = await import('@/lib/musicbrainz');
+            releaseYear = await getReleaseYear(artist, title);
+            if (releaseYear) {
+                console.log(`Fetched release year ${releaseYear} for "${title}" by "${artist}"`);
+            }
+        } catch (e) {
+            console.error('Failed to fetch release year from MusicBrainz:', e);
+        }
+
         const song = await prisma.song.create({
             data: {
                 title,
                 artist,
                 filename,
                 coverImage,
+                releaseYear,
             },
             include: { genres: true, specials: true }
         });
@@ -201,7 +215,7 @@ export async function POST(request: Request) {
 
 export async function PUT(request: Request) {
     try {
-        const { id, title, artist, genreIds, specialIds } = await request.json();
+        const { id, title, artist, releaseYear, genreIds, specialIds } = await request.json();
 
         if (!id || !title || !artist) {
             return NextResponse.json({ error: 'Missing fields' }, { status: 400 });
@@ -209,6 +223,11 @@ export async function PUT(request: Request) {
 
         const data: any = { title, artist };
 
+        // Update releaseYear if provided (can be null to clear it)
+        if (releaseYear !== undefined) {
+            data.releaseYear = releaseYear;
+        }
+
         if (genreIds) {
             data.genres = {
                 set: genreIds.map((gId: number) => ({ id: gId }))