Fix: Next.js 16 async params in API routes

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

@@ -3,11 +3,12 @@ import { prisma } from "@/lib/prisma"
 
 export async function GET(
   request: NextRequest,
-  { params }: { params: { id: string } }
+  { params }: { params: Promise<{ id: string }> }
 ) {
   try {
+    const { id } = await params
     const customer = await prisma.customer.findUnique({
-      where: { id: params.id },
+      where: { id },
       include: {
         timeEntries: {
           include: {
@@ -33,9 +34,10 @@ export async function GET(
 
 export async function PUT(
   request: NextRequest,
-  { params }: { params: { id: string } }
+  { params }: { params: Promise<{ id: string }> }
 ) {
   try {
+    const { id } = await params
     const body = await request.json()
     const { name, email, phone, company, address, notes } = body
 
@@ -44,7 +46,7 @@ export async function PUT(
     }
 
     const customer = await prisma.customer.update({
-      where: { id: params.id },
+      where: { id },
       data: {
         name,
         email: email || null,
@@ -64,11 +66,12 @@ export async function PUT(
 
 export async function DELETE(
   request: NextRequest,
-  { params }: { params: { id: string } }
+  { params }: { params: Promise<{ id: string }> }
 ) {
   try {
+    const { id } = await params
     await prisma.customer.delete({
-      where: { id: params.id },
+      where: { id },
     })
 
     return NextResponse.json({ success: true })

app/api/time-entries/[id]/route.ts

@@ -3,11 +3,12 @@ import { prisma } from "@/lib/prisma"
 
 export async function DELETE(
   request: NextRequest,
-  { params }: { params: { id: string } }
+  { params }: { params: Promise<{ id: string }> }
 ) {
   try {
+    const { id } = await params
     await prisma.timeEntry.delete({
-      where: { id: params.id },
+      where: { id },
     })
 
     return NextResponse.json({ success: true })