chore: upgrade next from 15.5.9 to 16.1.2

- Remove deprecated eslint config from next.config.ts
- Fix revalidateTag type signature for Next.js 16

Co-Authored-By: Claude <noreply@anthropic.com>

Author: ericyangpan

next.config.ts

@@ -91,12 +91,6 @@ const nextConfig: NextConfig = {
     ignoreBuildErrors: false,
   },
 
-  // ESLint configuration
-  eslint: {
-    // Set to true only if you want to skip linting during build
-    ignoreDuringBuilds: false,
-  },
-
   // Redirects configuration
   async redirects() {
     return [

package-lock.json

@@ -48,7 +48,7 @@
     "@opennextjs/cloudflare": "^1.15.1",
     "cmdk": "^1.1.1",
     "lucide-react": "^0.563.0",
-    "next": "^15.5.9",
+    "next": "^16.1.4",
     "next-intl": "^4.7.0",
     "react": "^19.2.1",
     "react-dom": "^19.2.1",

package.json

@@ -131,7 +131,7 @@ export async function POST(request: NextRequest) {
       })
     } else if (tag) {
       // Revalidate by tag
-      revalidateTag(tag)
+      revalidateTag(tag, 'layout')
       return NextResponse.json({
         revalidated: true,
         type: 'tag',