fix: 修复 Next.js 15 动态路由 params 参数类型

将 /api/projects/[slug]/route.ts 中的 params 类型从同步改为 Promise，以符合 Next.js 15 的类型要求

src/app/api/projects/[slug]/route.ts

@@ -15,10 +15,10 @@ import { prisma } from '@/lib/prisma'
  */
 export async function DELETE(
   request: NextRequest,
-  { params }: { params: { slug: string } }
+  { params }: { params: Promise<{ slug: string }> }
 ) {
   try {
-    const slug = params.slug
+    const { slug } = await params
 
     // Verify API Key
     const apiKey = request.headers.get('x-api-key') || process.env.WEBHOOK_API_KEY
@@ -104,10 +104,10 @@ export async function DELETE(
  */
 export async function GET(
   request: NextRequest,
-  { params }: { params: { slug: string } }
+  { params }: { params: Promise<{ slug: string }> }
 ) {
   try {
-    const slug = params.slug
+    const { slug } = await params
 
     const project = await prisma.project.findUnique({
       where: { slug },