feat: 添加推送通知功能，支持Web Push订阅和发送

app/api/push/subscribe/route.ts

@@ -0,0 +1,30 @@
+import { NextResponse } from 'next/server';
+import { prisma } from '@/lib/prisma';
+
+export async function POST(request: Request) {
+  try {
+    const subscription = await request.json();
+
+    if (!subscription || !subscription.endpoint || !subscription.keys) {
+      return NextResponse.json({ error: 'Invalid subscription object' }, { status: 400 });
+    }
+
+    await prisma.pushSubscription.upsert({
+      where: { endpoint: subscription.endpoint },
+      update: {
+        p256dh: subscription.keys.p256dh,
+        auth: subscription.keys.auth,
+      },
+      create: {
+        endpoint: subscription.endpoint,
+        p256dh: subscription.keys.p256dh,
+        auth: subscription.keys.auth,
+      },
+    });
+
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    console.error('Error saving subscription:', error);
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}