build(deps): upgrade Next.js to v16 and enable React Compiler

- Upgrade Next.js from 15.3.2 to 16.0.3
- Enable React Compiler with babel-plugin-react-compiler
- Update tsconfig.json to use react-jsx for compiler compatibility
- Remove turbopack from dev script
- Remove eslint.ignoreDuringBuilds configuration
- Refactor auth cookie handling to avoid double await

features/dashboard/actions/auth.ts

@@ -68,7 +68,8 @@ export async function signIn(prevState: { message: string | null, formData: { em
     }
 
     // Set the auth token cookie
-    await (await cookies()).set('keystonejs-session', response.data.authenticate.sessionToken, {
+    const cookieStore = await cookies();
+    cookieStore.set('keystonejs-session', response.data.authenticate.sessionToken, {
       secure: process.env.NODE_ENV === 'production',
       sameSite: 'lax',
       path: '/',

next.config.ts

@@ -1,10 +1,8 @@
 import type { NextConfig } from 'next';
 
 const nextConfig: NextConfig = {
+  reactCompiler: true,
   serverExternalPackages: ['graphql'],
-  eslint: {
-    ignoreDuringBuilds: true,
-  },
   // Workaround since we diverged from Keystone reltionship and document views
   // typescript: {
   //   ignoreBuildErrors: true,

package.json

@@ -3,7 +3,7 @@
   "version": "3.0.0",
   "private": true,
   "scripts": {
-    "dev": "keystone build --no-ui && npm run migrate && next dev --turbopack",
+    "dev": "keystone build --no-ui && npm run migrate && next dev",
     "build": "keystone build --no-ui && npm run migrate && next build",
     "start": "next start",
     "lint": "next lint",
@@ -71,7 +71,7 @@
     "graphql-yoga": "^3.1.0",
     "input-otp": "^1.4.2",
     "lucide-react": "^0.511.0",
-    "next": "15.3.2",
+    "next": "16.0.3",
     "next-themes": "^0.4.6",
     "nodemailer": "^7.0.5",
     "pluralize": "^8.0.0",
@@ -105,8 +105,9 @@
     "@types/pluralize": "^0.0.33",
     "@types/react": "^19",
     "@types/react-dom": "^19",
+    "babel-plugin-react-compiler": "^1.0.0",
     "eslint": "^9",
-    "eslint-config-next": "15.3.2",
+    "eslint-config-next": "16.0.3",
     "jsdom": "^26.1.0",
     "node-fetch": "^3.3.2",
     "prisma": "6.5.0",

proxy.ts

@@ -1,7 +1,7 @@
 import { handleDashboardRoutes, getAuthenticatedUser } from '@/features/dashboard/middleware';
 import { NextRequest, NextResponse } from 'next/server';
 
-export async function middleware(request: NextRequest) {
+export async function proxy(request: NextRequest) {
   // Get authenticated user once
   const { user, redirectToInit } = await getAuthenticatedUser(request);
   

tsconfig.json

@@ -1,7 +1,11 @@
 {
   "compilerOptions": {
     "target": "ES2017",
-    "lib": ["dom", "dom.iterable", "esnext"],
+    "lib": [
+      "dom",
+      "dom.iterable",
+      "esnext"
+    ],
     "allowJs": true,
     "skipLibCheck": true,
     "strict": true,
@@ -11,7 +15,7 @@
     "moduleResolution": "bundler",
     "resolveJsonModule": true,
     "isolatedModules": true,
-    "jsx": "preserve",
+    "jsx": "react-jsx",
     "incremental": true,
     "plugins": [
       {
@@ -19,9 +23,19 @@
       }
     ],
     "paths": {
-      "@/*": ["./*"]
+      "@/*": [
+        "./*"
+      ]
     }
   },
-  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
-  "exclude": ["node_modules"]
+  "include": [
+    "next-env.d.ts",
+    "**/*.ts",
+    "**/*.tsx",
+    ".next/types/**/*.ts",
+    ".next/dev/types/**/*.ts"
+  ],
+  "exclude": [
+    "node_modules"
+  ]
 }