fix(api): update songs endpoint to work with SpecialSong model

app/api/songs/route.ts

@@ -12,11 +12,15 @@ export async function GET() {
         include: {
             puzzles: true,
             genres: true,
-            specials: true,
+            specials: {
+                include: {
+                    special: true
+                }
+            },
         },
     });
 
-    // Map to include activation count
+    // Map to include activation count and flatten specials
     const songsWithActivations = songs.map(song => ({
         id: song.id,
         title: song.title,
@@ -27,7 +31,7 @@ export async function GET() {
         activations: song.puzzles.length,
         puzzles: song.puzzles,
         genres: song.genres,
-        specials: song.specials,
+        specials: song.specials.map(ss => ss.special),
     }));
 
     return NextResponse.json(songsWithActivations);
@@ -178,16 +182,51 @@ export async function PUT(request: Request) {
             };
         }
 
-        if (specialIds) {
-            data.specials = {
-                set: specialIds.map((sId: number) => ({ id: sId }))
-            };
+        // Handle SpecialSong relations separately
+        if (specialIds !== undefined) {
+            // First, get current special assignments
+            const currentSpecials = await prisma.specialSong.findMany({
+                where: { songId: Number(id) }
+            });
+
+            const currentSpecialIds = currentSpecials.map(ss => ss.specialId);
+            const newSpecialIds = specialIds as number[];
+
+            // Delete removed specials
+            const toDelete = currentSpecialIds.filter(sid => !newSpecialIds.includes(sid));
+            if (toDelete.length > 0) {
+                await prisma.specialSong.deleteMany({
+                    where: {
+                        songId: Number(id),
+                        specialId: { in: toDelete }
+                    }
+                });
+            }
+
+            // Add new specials
+            const toAdd = newSpecialIds.filter(sid => !currentSpecialIds.includes(sid));
+            if (toAdd.length > 0) {
+                await prisma.specialSong.createMany({
+                    data: toAdd.map(specialId => ({
+                        songId: Number(id),
+                        specialId,
+                        startTime: 0
+                    }))
+                });
+            }
         }
 
         const updatedSong = await prisma.song.update({
             where: { id: Number(id) },
             data,
-            include: { genres: true, specials: true }
+            include: {
+                genres: true,
+                specials: {
+                    include: {
+                        special: true
+                    }
+                }
+            }
         });
 
         return NextResponse.json(updatedSong);