feat(special-curation): complete implementation with all components

- Database: SpecialSong model with startTime
- Backend: API endpoints for curation
- Admin: Waveform editor and curation page
- Game: startTime support in AudioPlayer
- UI: Curate button in admin dashboard

app/api/specials/[id]/route.ts

@@ -0,0 +1,60 @@
+import { NextResponse } from 'next/server';
+import { PrismaClient } from '@prisma/client';
+
+const prisma = new PrismaClient();
+
+export async function GET(
+    request: Request,
+    { params }: { params: { id: string } }
+) {
+    try {
+        const specialId = parseInt(params.id);
+
+        const special = await prisma.special.findUnique({
+            where: { id: specialId },
+            include: {
+                songs: {
+                    include: {
+                        song: true
+                    },
+                    orderBy: {
+                        order: 'asc'
+                    }
+                }
+            }
+        });
+
+        if (!special) {
+            return NextResponse.json({ error: 'Special not found' }, { status: 404 });
+        }
+
+        return NextResponse.json(special);
+    } catch (error) {
+        console.error('Error fetching special:', error);
+        return NextResponse.json({ error: 'Internal Server Error' }, { status: 500 });
+    }
+}
+
+export async function PUT(
+    request: Request,
+    { params }: { params: { id: string } }
+) {
+    try {
+        const specialId = parseInt(params.id);
+        const { name, maxAttempts, unlockSteps } = await request.json();
+
+        const special = await prisma.special.update({
+            where: { id: specialId },
+            data: {
+                name,
+                maxAttempts,
+                unlockSteps: JSON.stringify(unlockSteps)
+            }
+        });
+
+        return NextResponse.json(special);
+    } catch (error) {
+        console.error('Error updating special:', error);
+        return NextResponse.json({ error: 'Internal Server Error' }, { status: 500 });
+    }
+}

app/api/specials/[id]/songs/route.ts

@@ -0,0 +1,86 @@
+import { NextResponse } from 'next/server';
+import { PrismaClient } from '@prisma/client';
+
+const prisma = new PrismaClient();
+
+export async function POST(
+    request: Request,
+    { params }: { params: { id: string } }
+) {
+    try {
+        const specialId = parseInt(params.id);
+        const { songId, startTime = 0, order } = await request.json();
+
+        const specialSong = await prisma.specialSong.create({
+            data: {
+                specialId,
+                songId,
+                startTime,
+                order
+            },
+            include: {
+                song: true
+            }
+        });
+
+        return NextResponse.json(specialSong);
+    } catch (error) {
+        console.error('Error adding song to special:', error);
+        return NextResponse.json({ error: 'Internal Server Error' }, { status: 500 });
+    }
+}
+
+export async function PUT(
+    request: Request,
+    { params }: { params: { id: string } }
+) {
+    try {
+        const specialId = parseInt(params.id);
+        const { songId, startTime, order } = await request.json();
+
+        const specialSong = await prisma.specialSong.update({
+            where: {
+                specialId_songId: {
+                    specialId,
+                    songId
+                }
+            },
+            data: {
+                startTime,
+                order
+            },
+            include: {
+                song: true
+            }
+        });
+
+        return NextResponse.json(specialSong);
+    } catch (error) {
+        console.error('Error updating special song:', error);
+        return NextResponse.json({ error: 'Internal Server Error' }, { status: 500 });
+    }
+}
+
+export async function DELETE(
+    request: Request,
+    { params }: { params: { id: string } }
+) {
+    try {
+        const specialId = parseInt(params.id);
+        const { songId } = await request.json();
+
+        await prisma.specialSong.delete({
+            where: {
+                specialId_songId: {
+                    specialId,
+                    songId
+                }
+            }
+        });
+
+        return NextResponse.json({ success: true });
+    } catch (error) {
+        console.error('Error removing song from special:', error);
+        return NextResponse.json({ error: 'Internal Server Error' }, { status: 500 });
+    }
+}